Water Resources Data Minnesota Water Year 1982

Volume 2. Upper Mississippi and Missouri River Basins

Volume 1. Great Lakes and Souris-Red-Rainy River Basins

U.S. GEOLOGICAL SURVEY WATER-DATA REPORT MN-82-2 Prepared in cooperation with the Minnesota Department of Natural Resources, Division of Waters; the Minnesota Department of Transportation; and with other State, municipal, and Federal agencies CALENDAR FOR WATER YEAR 1982

1981

OCTOBER NOVEMBER DECEMBER

S M T W T F S S M T W T F S S M T W T F S

123 1234567 12345 4 5 6 7 8 9 10 8 9 10 11 12 13 14 6 7 8 9 10 11 12 11 12 13 14 15 16 17 15 16 17 18 19 20 21 13 14 15 16 17 18 19 18 19 20 21 22 23 24 22 23 24 25 26 27 28 20 21 22 23 24 25 26 25 26 27 28 29 30 31 29 30 27 28 29 30 31

1982

JANUARY FEBRUARY MARCH

S M T W T F S S M T W T F S S M T W T F S

1 2 123456 123456 3456789 7 8 9 10 11 12 13 7 8 9 10 11 12 13 10 11 12 13 14 15 16 14 15 16 17 18 19 20 14 15 16 17 18 19 20 17 18 19 20 21 22 23 21 22 23 24 25 26 27 21 22 23 24 25 26 27 24 25 26 27 28 29 30 28 28 29 30 31 31

APRIL MAY JUNE

S M T W T F S S M T W T F S S M T W T F S

1 2 3 1 12345 4 5 6 7 8 9 10 2345678 6 7 8 9 10 11 12 11 12 13 14 15 16 17 9 10 11 12 13 14 15 13 14 15 16 17 18 19 18 19 20 21 22 23 24 16 17 18 19 20 21 22 20 21 22 23 24 25 26 25 26 27 28 29 30 23 24 25 26 27 28 29 27 28 29 30 30 31

JULY AUGUST SEPTEMBER

S M T W T F S S M T W T F S S M T W T F S

1 2 3 1234567 1234 4 5 6 7 8 9 10 8 9 10 11 12 13 14 5 6 7 8 9 10 11 11 12 13 14 15 16 17 15 16 17 18 19 20 21 12 13 14 15 16 17 18 18 19 20 21 22 23 24 22 23 24 25 26 27 28 19 20 21 22 23 24 25 25 26 27 28 29 30 31 29 30 31 26 27 28 29 30 Water Resources Data Minnesota Water Year 1982

Volume 2. Upper Mississippi and Missouri River Basins by Kurt T. Gunard, Joseph H. Hess, James L. Zirbel, and Charles E. Cornelius

Volume 1. Great Lakes and Souris-Red-Rainy River Basins

U.S. GEOLOGICAL SURVEY WATER-DATA REPORT MN-82-2 Prepared in cooperation with the Minnesota Department of Natural Resources, Division of Waters; the Minnesota Department of Transportation; and with other State, municipal, and Federal agencies UNITED STATES DEPARTMENT OP THE INTERIOR

JAMES G. WATT, Secretary

GEOLOGICAL SURVEY

Dallas L. Peck, Director

For additional information write to:

District Chief, Water Resources Division U.S. Geological Survey 702 Post Office Building St. Paul, Minnesota 55101

1983 PREFACE This volume of the annual hydrologic data report of Minnesota is one of a series of annual reports that document hydrologic data gathered from the U.S. Geological Survey 1 a surface- and ground-water data-collection networks in each State, Puerto Rico, and the Trust Territories. These records of streamflow, ground-water levels, and water quality provide the hydrologic information needed by State, local, and Federal agencies, and the private sector for developing and managing our Nation's land and water resources. Hydrologic data for Minnesota are contained in 2 volumes: Volume 1. Great Lakes and Souris-Red-Rainy River Basins Volume 2. Upper Mississippi and Missouri River Basins This report is the culmination of a concerted effort by dedicated personnel of the U.S. Geological Survey who collected, compiled, analyzed, verified, and organized the data, and who typed, edited, and assembled the report. In addition to the authors, who had primary responsibility for assuring that the information contained herein is accurate, complete, and adheres to Geological Survey policy and established guidelines, the following individuals contrib­ uted significantly to the preparation of this report: Donald W. Ericson, Subdistrict Chief, Grand Rapids, Minnesota Mark R. Have, Water-Quality Specialist, Minnesota District Henry W. Anderson, Jr., Ground-Water Project Chief, Minnesota District Most of the data were collected, processed, and tabulated by the following individuals: David J. Bauer Jeffrey L. Henry William D. Bemis Jerry K. Hicks Ruth E. Bergstrom James E. Jacques Howard D. Braden Roderick L. Johnson Alex Brietkrietz Gregory R. Melhus Robin G. Brown Gregory B. Mitton John L. Callahan Luanne Nelson Linda M. Christenson Charles J. Shiith Paul E. "flelsheim Gregory W. Stratton Patrick J. Blnnegan Lan H. Tornes William A. Gothard Duane A. Wicklund Tillie L. Yocus Jo Anne A. Jannis typed the text of the report. This report was prepared in cooperation with the State of Minnesota and with other agencies under the general supervision of Donald R. Albin, District Chief, Minnesota.

in 50272-10) REPORT DOCUMENTATION 1. REPORT NO. 3. Recipient's Accession No. PAGE USGS/WRD/HD-84/004 4. Title and Subtitle 5. Report Date Water Resources for Minnesota, Water year 1982 October 1983 Volume 2, Upper Mississippi and Missouri River Basins

7. Author(s) Kurt T. Gunard, Joseph H. Hess, James L. Zirbel, 8. Performing Organization Rept. No. and Charles E. Cornelius 9. Performing Organization Name and Address 10. Project/Task/Work Unit No. USGS-WRD-MN-82-2 U.S. Geological Survey, Water Resources Division 11. Contract(C) or Grant(G) No. 702 Post Office Building (C) St. Paul, Minnesota 55101 (G)

12. Sponsoring Organization Name and Address 13. Type of Report & Period Covered Annual Oct. 1, 1981 U.S. Geological Survey, Water Resources Division to Sept. 30, 1982 702 Post Office Building 14. St. Paul, Minnesota 55101______15. Supplementary Notes Prepared in cooperation with the State of Minnesota and with other agencies.

16. Abstract (Limit: 200 words)

Water-resources data for the 1982 water year for Minnesota consist of records of stage, discharge and water quality of streams; stage, contents, and water quality of lakes and reservoirs; and water levels and water quality in wells and springs. This volume contains discharge records for 83 gaging stations; stage and contents for 9 lakes and reservoirs; water quality for 27 stream stations, 19 partial-record stations, 1 precipitation station, and 63 wells; and water levels for 238 observation wells. Also included are 108 high-flow partial-record stations. Additional water data were collected at various sites, not part of the systematic data collection program, and are published as miscellaneous measurements. These data, together with the data in Volume 1, represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in Minnesota.

17. Document Analysis a. Descriptors *Minnesota, *Hydrologic data, *Surface water, *Ground water, *Water quality, Plow rate, Gaging stations, Lakes, Reservoirs, Chemical analyses, Sediments, Water temperatures, Sampling sites, Water levels, Water analyses, Data collection

b. Identifiers/Open-Ended Terms

c. COSATI Field/Group

is. Availability state.™: No restriction on distribution 19. Security Class (This Report) 21. No. of Pages This report may be purchased from UNCLASSIFIED National Technical Information Service 20. Security Class (This Page) 22. Price _____Qrveixia-f* -i /=>! r\ VA TJMfJLASSTFTED (See ANSI-Z39.1 See Instructions on Reverse OPTIONAL FORM 272 (4-77) (Formerly NTIS-35) Department of Commerce CONTENTS

Page Preface...... Ill List of gaging stations, in downstream order, for which records are published...... VI List of ground-water wells, by county, for which records are published...... VIII Introduction...... 1 Cooperation...... 1 Hydrologlc conditions...... 2 Definition of terms...... 3 Downstream order and station number...... 14 Numbering system for wells and miscellaneous sites...... 14 Special networks and programs...... 14 Explanation of stage and water-discharge records...... 15 Collection and computation of data...... 15 Accuracy of field data and computed results...... 17 Other data available...... 17 Records of discharge collected by agencies other than the Geological Survey...... 17 Explanation of water-quality records...... 17 Collection and examination of data...... 17 Water analysis...... 18 Water temperature...... 18 Sediment...... 18 Explanation of ground-water level records...... 18 Collection of the data...... 18 Publications on techniques of water-resources investigations...... 24 Discontinued gaging stations ...... 25 Gaglng-statlon records...... 29 Discharge at partial-record stations and miscellaneous sites...... 289 High-flow partial-record stations...... 291 Miscellaneous sites...... 305 Analyses of samples collected at water-quality miscellaneous sites...... 307 Miscellaneous analyses of streams...... 325 Ground-water records...... 335 Ground-water level records...... 338 Quality of ground-water records...... 437 Index...... 445

ILLUSTRATIONS

Figure 1. Graph showing comparison of discharge at four long-term representative gaging stations for the current year with median discharge for water years 1951-80..., 2. Graph showing comparison of dissolved-solids concentrations for the current year with mean monthly values for the periods of record...... 3. Graph showing comparison of suspended-sediment loads for the current year with mean monthly values for the periods of record...... 4. Hydrograph showing long-term changes in water level for period of record in well 130N 29W08DCCO1, Morrison County...... 5 Diagram showing system for numbering wells and miscellaneous sites...... 14 6. Map showing location of water-discharge stations...... 20 7. Map showing location of water-quality stations...... 22 8. Map showing location of high-flow partial-record stations...... 292 9. Map showing location of ground-water wells...... 336 VI GAGING STATIONS, IN DOWNSTREAM ORDER, FOR WHICH RECORDS ARE PUBLISHED Letter after station name designates type of data: (d) discharge; (e) gage height, elevation, or contents; (a) chemical, radio-chemical , or pesticides; (b) biological or micro-biological; (p) physical (water temperature, sediment, or specific conductance) Page

UPPER MISSISSIPPI RIVER BASIN Mississippi River: Winnibigoshish Lake near Deer River...... (- 29 Mississippi River at Winnibigoshish Dam, near Deer River...... (d 30 LEECH LAKE RIVER BASIN Williams Lake near Akeley...... i(- - c b p) 31 Leech Lake at Federal Dam...... (- e - - -) 41 Leech Lake River at Federal Dam...... (d - - - -) 42 Pokegama Lake near Grand Rapids...... i(- e - - -) 43 Mississippi River at Grand Rapids...... (d - - - p) 44,325 PRAIRIE RIVER BASIN Prairie River near Taconite...... (d - - - p) 45,325 SWAN RIVER BASIN Swan River near Calumet...... (d - - - p) 46,325 SANDY RIVER BASIN Sandy Lake at Libby...... (- e - - -) 47 Sandy Rive r at Sandy Lake Dam, at Libby...... (d - - - 48 Mississippi River below Sandy River, near Libby...... (d - - - -) 49 Mississippi River at Aitkin...... (d - - - P) 50,325 PINE RIVER BASIN Pine River Reservoir at Cross Lake...... (- e - - 51 Pine River at Cross Lake Dam, at Cross Lake...... (d - - - 52 CROW WING RIVER BASIN Long Prairie River at Long Prairie...... (d - - - p), 53,326 Gull River: Gull Lake near Brainerd...... (- e - - -) 54 Gull River at Gull Lake Dam, near Brainerd...... (d - - - -)• 55 Crow Wing River near Pillager...... (d - - - p) 56,326 Mississippi River near Royalton...... (d - c b p), 57,326 ELK RIVER BASIN St. Francis River above Zimmerman...... (d 64 Elk Rive r nea r Big Lake...... (d 65,326 CROW RIVER BASIN North Fork Crow River: Middle Fork Crow River near Spicer...... (d. - - - p) 66,326 Crow River at Rockford...... (d - - - p) 67,326 RUM RIVER BASIN Mille Lacs Lake (head of Rum River) at Garrison...... (- e - - -) 68 Rum River near St. Francis...... (d - - - p) 69,327 ELM CREEK BASIN Fish Lake Inlet before wetland near Maple Grove...... (d - - - -) 70 Fish Lake Inlet after wetland near Maple Grove...... (d - - - -) 72 Fish Lake Outlet near Interstate 94 in Maple Grove...... (d - - 74 Elm Creek near Champlin...... (d - - - P) 76,327 Mississippi River near Anoka...... (d - c - P) ,77-80,327 Mississippi River at Fridley...... (- - c - P) 81 Bassett Creek in Golden Valley...... (d - - 88,327 Mississippi River at Ford Plant, St. Paul...... (- - - - P) 89 MINNESOTA RIVER BASIN Whetstone River near Big Stone City, SD...... (d - - P) 96,327 Big Stone Lake at Ortonville...... (- - - -) 99 Minnesota River at Ortonville...... (d - - - p) . 100,327 Yellow Bank River: La Bolt Impoundment Inlet at La Bolt, SD...... (d - c b p) 101 La Bolt Impoundment Pool at La Bolt, SD...... (- e c b p) 104 La Bolt Impoundment Outlet at La Bolt, SD...... (d - c b p) 110 Yellow Bank River near Odessa...... (d - - - P) , 112,328 Pomme de Terre River at Appleton...... (d - - P) , 117,328 Lac qui Parle River near Canby...... (d - c b p) 118 Lac qui Parle River near Lac qui Parle...... |(d - P) , 121,328 Minnesota River near Lac qui Parle...... (d - - - P) , 122,328 Chippewa River near Milan...... (d - - - P) , 123,328 Minnesota River at Montevideo...... (d - - - P) , 124,329 Yellow Medicine River: North Branch Yellow Medicine River: Dillon-Syltie Impoundment Inlet near Porter...... (d - c b p) 125 Dillon-Syltie Impoundment Pool near Porter...... (- e c b p) 129 Dillon-Syltie Impoundment Outlet near Porter...... (d - c b p) 137 Yellow Medicine River near Granite Falls...... (d - - - p) 141,329 Redwood River near Marshall...... (d - - - p) 142,329 Redwood River near Redwood Falls...... (d - - - p) 143,329 Cottonwood River: Dry Creek near Jeffers...... (d - - - p) 144 Cottonwood River near New Ulra...... (d - - - p) 145,329 Little Cottonwood River near Courtland...... (d - - - p) 146,329 GAGING STATIONS, IN DOWNSTREAM ORDER—Continued r VII Page UPPER MISSISSIPPI RIVER BASIN—Continued Blue Earth River: Watonwan River near Garden City...... (d „ - - - p)... 147,330 Blue Earth River near Rapidan...... (d - - - p)... 148,330 Le Sueur River near Rapidan...... (d - - - p)... 149,330 Minnesota River at Mankato...... (d - - - p)... 150,330 High Island Creek near Henderson...... (d - - - p)... 153,330 Minnesota River near Jordan...... (d - c b p)... 154,330 Riley Creek: Lake Susan Outlet near Chanhassen...... (d - - - -)... 164 Lake Riley Inlet near Shakopee...... (d - - - -)... 165 Spring Lake Inlet before pond near Prior Lake...... (d - - - -)... 166 Spring Lake Inlet after pond near Prior Lake...... (d - - - -)... 168 Spring Lake Outlet near Prior Lake...... (d - - - -)... 170 South Pork Nine Mile Creek: Bryant Lake Inlet near Eden Prairie...... (d - - - -)... 172 Bryant Lake Outlet near Eden Prairie...... (d - - - -)... 174 Minnesota River at Burnsville...... (- - c - p)... 175 Minnesota River at Port Snelling State Park, at St. Paul...... (d - c - p)... 182 Mississippi River at St. Paul...... (d - - - p)... 189,331 Mississippi River at Industrial Molasses at St. Paul...... (- - c - p)... 193 Mississippi River at Fifth Street at Newport...... (- - c - p)... 199 Mississippi River at Grey Cloud Island near Cottage Grove...... (d - c - p)... 206 Mississippi River at NIninger...... (d - c b p)... 213 Mississippi River at lock and dam 2, at Hastings...... (- - c - p)... 215 ST. CROIX RIVER BASIN St. Croix River: Kettle River: Kettle River below Sandstone...... (d - - - p)... 222,331 Kettle River near Cloverdale...... (d - c b p)... 223 Snake River: Knife River near Mora...... (d - - - p)... 224,331 Snake River near Pine City...... (d - c b p)... 225,300 Sunrise River near Lindstrora...... (d - - - p)... 226,331 St. Croix River at St. Croix Palls, WI...... (d - c b p)... 227 Square Lake Outlet near Stillwater...... (d - - - -)... 230 Eagle Point Lake Inlet near Oakdale...... (d ----)... 232 Lake Elmo Inlet from Eagle Point Lake near Oakdale...... (d - - - -)... 234 Lake Elmo Outlet on County Road 17 near Oakdale...... (d - - - -)... 235 St. Croix River at Afton...... (- - c - p)... 237 Mississippi River at Prescott, WI...... (d - - - p)... 243,331 Mississippi River at lock and dam 3, near Red Wing...... (- - c - p)... 244 VERMILLION RIVER BASIN Vermillion River near Empire...... (d - c - p)... 251,331 CANNON RIVER BASIN Cannon River: Straight River near Paribault...... (d - - - p)... 259,331 ZUMBRO RIVER BASIN South Pork Zumbro River at Rochester...... (d - - - p)... 260,332 Zumbro River at Kellogg...... (d - - - p)... 263,332 WHITEWATER RIVER BASIN North Pork Whitewater River near Elba...... (d - c b p)... 264,332 Whitewater River near Beaver...... (d - - - p)... 269,332 GARVIN BROOK BASIN Garvin Brook at Stockton...... (d - - - p)... 270,332 Stockton Valley Creek at Stockton...... (d - - - p)... 271,332 Garvin Brook near Minnesota City...... (d - - - p)... 274,332 Rollingstone Creek: Straight Valley Creek near Rollingstone...... (d - - - p)... 277,333 Mississippi River at Winona...... (d - c b p)... 278,333 ROOT RIVER BASIN Root River near Lanesboro...... (d - - - p)... 284,333 Root River near Houston...... (d - - - p)... 285,333 South Pork Root River near Houston...... (d - - - p)... 286,333 IOWA RIVER BASIN Iowa River: Cedar River near Austin...... (d - - - p)... 287,333 DBS MOINES RIVER BASIN Des Moines River at Jackson...... (d - - - p)... 288,333 VIII GROUND-WATER WELLS, BY COUNTY, . FOR WHICH RECORDS ARE PUBLISHED Page AITKIN Well 045N23W05ADD01...... 338 Well 047N27W26BBC01...... 338 ANOKA Well 031N22W18AAA01...... 339 Well 031N22W18AAA05...... 339 Well 031N22W23CBCO1...... 339 Well 031N22W23CBCO 2...... ^...... 340 Well 031N24W01CBB01...... 3^0 Well 032N23W04AADO 2...... 341 Well 033N23W05BAB01...... 341 Well 033N24W30ABBO1...... 31*! Well 034N24W25DAC01...... 3^2 BECKER Well 139N36WO 2CCC01...... 3^2 Well 141N37W17AAA01...... 343 Well 141N37W34DDD01...... 343 BELTRAMI Well 147N34W35ADC01...... 344 BENTON Well 036N 29W30BCCO 2...... 344 Well 038N31W18DCA01...... 345 Well 038N31W18DCD02...... 3*»5 BIG STONE Well 121N44W27CCC01...... 3^6 Well 124N48W17AAA01...... 346 Well 124N48W23AAA04...... 3^6 BLUE EARTH Well 106N28WO 3DBAO1...... 347 Well 108N25WO 4BBCO1...... 347 BROWN Well 108N30W09ADD01...... 347 Well 110N3 2W30DDB01...... 3^8 CARLTON Well 046N19W21CBB01...... 348 Well 048N18W21ACD01...... 3^9 CARVER Well 116N 23W12CDB01...... 349 CASS Well 135N32W33CDD01...... 350 Well 138N3 2W15AAA01...... 351 CHIPPEWA Well 119N41W29DDD01...... 351 Well 119N4 2W17DDD01...... 352 CHISAGO Well 033N21W20BBCO 2...... 352 Well 035N19W17BABO 2...... 353 Well 035N19W17BDB01...... 353 Well 035N21W26BCC01...... 353 COTTONWOOD Well 105N36W08ACA01...... 354 Well 105N38W20BAA01...... 354 CROW WING Well 135N28W16CCD01...... 355 DAKOTA Well 0 27N 23W09ABDO1...... 355 Wel1 0 27N24W34BDCO1...... 356 Well 028N22W19DCCO2...... 356 Well 112N18W08ABA01...... 356 Well 112N18W08BBC01...... 357 Well 112N19W30DBD01...... 358 Well 113N18W07BAC01...... 358 Well 114N17W10AAA01...... 358 Well 114N17W15ADA01...... 359 Well 114N17W16CBB01...... 359 Well 114N17W33BBC01...... 360 Well 114N18W17AABO1...... 360 Well 114N18W35CCB01...... 360 Well 114N19W04DAC01...... 36l Well 114N19W32BAD01...... 361 Well 115N18W18BCB01...... 36l DODGE Well 105N18W13DDD01...... 362 Well 107N17W13BBAO1...... 362 DOUGLAS Well 127N40W27CBB01...... 363 Well 129N36W15BBB01...... 363 Well 129N36W18CBB01...... 363 Well 130N36W04BCC01...... 364 Well 130N36W23DDD01...... j...... 364 GROUND-WATER WELLS, BY COUNTY, FOR WHICH RECORDS ARE PUBLISHED—Continued IX Page

FARIBAULT Well 103N28W24BDC01...... 365 Well 104N26W36CAC01...... 365 Well 104N27W16/VBA01...... 366 PREEBORN Well 101N23W02DAC01...... 366 Well 102N21W09CCB01...... 366 Well 103N20W36CCB01...... 367 Well 103N23W13CDA01...... 367 GOODHUE Well 110N15W31BBD01...... 367 Well 111N15W21CDA01...... 368 Well 113N15W27BAB01...... 368 GRANT Well 127N41W06CAGO 1...... 369 Well 127N41W32BBA01...... 369 Well 129N41W31ACA01...... 369 Well 130N42W23DBD01...... 370 Well 130N42W36CCC02...... 370 HEKNEPIN Well 027N24W30AAA01...... 370 Well 027N24W30BDA01...... 371 Well 028N24W23ADD01...... 371 Well 029N24W06CCCO 1...... 372 Well 029N24W23CCB02...... 372 Well 029N24W26BAB01...... 372 Well 029N24W27A8D01...... 373 Well 116N21W07DAD01...... 373 Well 117N21W16CCA01...... 373 Well 117N21W16CDB01...... 374 Well 117N21W32DAD01...... 374 Well 117N22W03ADC01...... 374 Well 117N23W11BBD01...... 375 Well 118N21W07DCB01...... 375 Well 118N21W32CBB01...... 376 Well 118N21W32CBD01...... 376 Well 119N21W0488A01...... 376 Well 119N21W19DDD01...... 377 Well 119N22W28ACC01...... 377 HUBBARD \ Well 139N32W16AAA01...... 378 Well 139N35W13DAD01...... 378 Well 140N32W32BBA01...... 378 Well 140N35W168CC01...... 379 ISAMTI Well 035N24W14BCD01...... 379 Well 035N24W14CDC01...... 380 Well 036N23W32ACB01...... 380 ITASCA Well 055N25W17ACD01...... 38! JACKSON Well 104N37W19DBD01...... 38! KANABEC Well 038N23W07DBB01...... 381 Well 039N23W05DAC01...... 382 Well 039N24W11DDC01...... 382 Well 039N24W20DDD01...... 383 KANDIYOHI Well 119N35W14ABB01...... 383 Well 122N33W04BCD01...... 383 Well 122N34W06CBC01...... 384 LE SUEUR Well 111N26W14ADA01...... 384 Well 112N23W02BAB01...... 384 Well 112N23W06DDD01...... 385 LINCOLN Well 110N44W33DCD01...... 385 MARTIN Well 103N32W08CCD01...... 385 Well 104N33W28BAB01...... 386 MC LEOD Well 115N27W14ABA01...... 386 Well 115N28W05ACC01...... 386 Well 115N28W11ADD01...... 387 Well 116N29W35DDC01...... 387 Well 117N27W10DAA01...... 388 MEEKER Well 119N30W19AAB01...... 388 Well 121N31W26BDC01...... 389 X GROUND-WATER WELLS, BY COUNTY, FOR WHICH RECORDS ARE PUBLISHED—Continued

MILLE LACS Well 038N27W35ABC01...... 389 MORRISON Well 039N31W23DAA01...... 389 Well 039N32W09DCC01...... 390 Well 041N32W13DCA01...... 390 Well 130N29W08DCC01...... 391 MOWER Well 102N18W05AC301...... 391 Well 103N17W09DAA01...... 391 MURRAY Well 105N43W18BCC01...... 392 Well 106N40W12ABB01...... 392 OLMSTED Well 106N14W14ADB01...... 393 OTTER TAIL Well 131N36W20BGC01...... 393 Well 133N37W23CCB01...... 393 Well 133N39W10CCD01...... 394 PINE Well 040N18W18DBC01...... 394 Well 041N18W33AAD01...... 395 Well 041N20W32B8B01...... 395 Well 044N20W13AA

SHERBURNE Well 033N27W21CCA01...... 415 Well 033N27W29CDC01...... 415 Well 034N27W18AAB01...... 4l6 Well 034N28W31BDD02...... 4l6 Well 035N26W15DBB01...... 417 Well 035N27W29DBBO 2...... 417 Well 035N29W28ABC01...... 4l8 STEARNS Well 122N28W07ABA02...... 418 Well 123N32W33AAD02...... 419 Well 124N28W21CDA01...... 419 Well 125N33W03CDA02...... 419 Well 126N30W17ABC02...... 420 STBELE Well 106N20W30BAD01...... 420 Well 107N20W16ABD01...... 421 SWIFT Well 120N43W02DDD01...... 421 Well 121N39W06BDB01...... 421 Well 122N42W21BBB01...... 422 TODD Well 128N33W17CCB01...... 422 Well 130N33W16BBA01...... 423 Well 132N33W26DCC01...... 423 Well 133N32W14CCC01...... 423 Well 133N35W07CCC01...... 424 WABASHA Well 111N12W04BBD01...... 424 WADENA Well 134N34W19ADD01...... 425 Well 135N33W14ADD01...... 425 Well 137N33W29DAA01...... t ...... 425 Well 137N34W07DDD01...... 426 WASHINGTON Well 027N20W02BCC01...... 427 Well 027N20W02BCC02...... 427 Well 027N20W02BCC03...... 427 Well 027N21W28BCC01...... 428 Well 028N20W11C/U01...... 428 Well 029N21W06CAD01...... 429 Well 029N21W10CCC01...... 429 Well 029N21W13CAB01...... 430 Well 030N20W03CAD01...... 430 Well 030N20W03CAD03...... 430 Well 031N21W28ABD01...... 431 Well 032N20W30BCD01...... 431 WATONWAN Well 106N32W01DDB01...... 431 Well 107N31W14DAC01...... 432 Well 107N31W35CAC01...... 432 WINONA Well 106N10W19DDA01...... 432 WRIGHT Well 118N27W03CAC01...... 433 Well 118N27W03CAC03...... 433 Well 119N26W24BAB02...... 433 Well 119N26W35DDA01...... 434 Well 121N25W153BA02...... 434 YELLOW MEDICINE Well 1UN4CW16BAC01...... 435 Well 114N45W04DCD01...... 436 XII

ir- WATER RESOURCES DATA FOR MINNESOTA, 1982 INTRODUCTION Water resources data for the 1982 water year for Minnesota consist of records of stage, dis­ charge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; and water levels and water quality of ground water. This volume contains discharge records for 83 gaging stations; stage and contents for 9 lakes and reservoirs; water quality for 27 stream sta­ tions, 19 partial-record stations, 1 precipitation station, and 63 wells; and water levels for 238 observation wells. Also included are 108 high-flow partial-record stations. Additional water data were collected at various sites, not involved in the systematic data collection program, and are published as miscellaneous measurements. These data, together with the data in Volume 1, represent that part of the National Water Data System collected by the U.S. Geological Survey and cooperating State and Federal agencies in Minnesota. Records of discharge or stage of streams, and contents or stage of lakes and reservoirs were first published in a series of U.S. Geological Survey water-supply papers titled "Surface Water Supply of the United States." Through September 30, I960, these water-supply papers were in an annual series and then in a 5-year series for 1961-65 and 1966-70. Records of chemical quality, water temperatures, and suspended sediment were published from 1941 to 1970 in an annual series of water supply papers titled "Quality of Surface Waters of the United States." Records of ground- water levels were published from 1935 to 1974 in a series of water-supply papers titled "Ground- Water Levels in the United States." Water-supply papers may be consulted in the libraries of the principal cities in the United States or may be purchased from Branch of Distribution, U.S. Geological Survey, 1200 South Eads Street, Arlington, VA 22202. For water years 1961 through 1974, streamflow data were released by the Geological Survey in annual reports on a State-boundary basis. Water-quality records for water years 1964 through 1974 were similarly released either in separate reports or in conjunction with streamflow records. Beginning with the 1975 water year, water data for streamflow, water quality, and ground water are published as an official Survey report on a State-boundary basis. These official Survey reports carry an identification number consisting of the two letter State abbreviation, the last two digits of the water year, and the volume number. For example, this report is identified as "U.S. Geological Survey Water-Data Report MN-82-2." Water-Data reports are for sale by the National Technical Information Service, U.S. Department of Commerce, Springfield, VA 22l6l. Additional information, including current prices, for ordering specific reports may be obtained from the district chief at the address given on the back of the title page or by telephone (612) 725-7841.

COOPERATION The U.S. Geological Survey and organizations of the State of Minnesota have had cooperative agreements for the systematic collection of streamflow records since 1909, for ground-water levels since 1948, and for water-quality records since 1952. Organizations that assisted in collecting data through cooperative agreement with the Survey are: Minnesota Department of Natural Resources, Division of Waters, Larry Seymour, director. Minnesota Department of Transportation, Richard P. Braun, commissioner. Minnesota Pollution Control Agency, Sandra Gardebring, executive director. Metropolitan Waste Control Commission of the Twin Cities Area, George H. Prison, chairman. Metropolitan Council of the Twin Cities Area, Gerald J. Isaacs, chairman. Elm Creek Conservation Commission, Fred G. Moore, chairman. Red Lake Watershed District, Paul Brekken, president. Middle River-Snake River Watershed District, Donald Rivard, chairman. City of Eagan, Bea Blomquist, mayor. Assistance in the form of funds or services was given by the Corps of Engineers, U.S. Army, in collecting records for 43 gaging stations and 17 water-quality stations published in this report. Eleven gaging stations in the Hudson Bay and St. Lawrence River basins were maintained by funds appropriated to the United States Department of State. Eight of these, on waters adjacent to the international boundary, are maintained by the United States (or Canada) under agreement with Canada (or the United States), and the records are obtained and compiled in a manner equally acceptable in both countries. These stations are designated herein as "International gaging stations." 1 2 WATER RESOURCES DATA FOR MINNESOTA, 1982 Some records for the Red River of the North, which borders the State on the west, were obtained at the request of other Federal agencies as a part of the program of the U.S. Department of the Interior for development of the Missouri River basin.

HYDROLOGIC CONDITIONS

PRECIPITATION AND STREAMFLOW

Normal annual precipitation in Minnesota ranges from 19 inches in the northwest to 32 inches in the southeast. The average annual runoff ranges from less than 2 inches in the west to more than 16 inches in the northeast. The 1982 water year began with rainfall amounts that were considerably above normal throughout the State during October. Total precipitation for the year was above normal over the entire State, except in the east-central part where it was slightly below normal. Annual runoff in 1982 ranged from 0.3 inch in parts of the west to more than 20 inches in the northeast. Runoff statewide averaged 130 percent of normal. Records from stations in central and southern Minnesota indicate a considerable variation in annual runoff from near average to much above average. Runoff in the Crow River at Rockford in east-central Minnesota was 6.85 inches, which is much above average for the year. In southeast Minnesota, runoff in the Root River near Houston was 9«57 inches, which also was much above average. Chippewa River near Milan, in west-central Minnesota, and Des Moines River at Jackson, in southwest Minnesota, had near average runoff for the year with 2.76 and 2.75 inches, respectively. Annual and monthly mean discharges for these stations are compared to median discharges for a 30- year base period in figure 1. Annual mean streamflow was below average at a few gaging stations in west-central and southwest Minnesota, but average or above at the remaining stations in these areas. Streamflow at most stations in central, east-central, south-central, and southeast Minnesota was average or above; several stations in each of these areas recorded excessive streamflow. No peaks of record were exceeded during 1982 at any gaging stations on streams for which records are published in this volume. The combined storage in the six Mississippi River Headwater Reservoirs (Winnibigoshish, Leech, Pokegama, Pine, Sandy, and Gull) was 1,470,119 acre-feet at the end of the 1982 water year—an increase of 21,798 acre-feet from the corresponding date a year ago.

WATER QUALITY

Dissolved-solids data from selected NASQAN stations and suspended-sediment-load data from selected daily sediment stations were used to indicate variations in water quality in the Upper Mississippi River basin. No water-quality stations in Minnesota monitor water quality in the Missouri River basin. Dissolved-solids concentrations in the Upper Mississippi River basin, including the Minnesota River basin, were -generally higher than average (fig. 2). Other factors besides streamflow appear to have significant influence on the concentrations of dissolved solids. Suspended-sediment loads are higher than average during spring runoff in the Mississippi River near Anoka and Mississippi River at Winona, but lower than average in the Minnesota River at Mankato and Root River near Houston (fig. 3). Sediment discharge was extremely low during spring runoff in the Yellow Bank River near Odessa in west-central Minnesota. Several samples of ground water collected throughout the Upper Mississippi River basin exceeded the U.S. Environmental Protection Agency's drinking water standards of 50 ug/L and 10 mg/L for manganese and nitrite plus nitrate nitrogen, respectively.

GROUND-WATER LEVELS

Water levels in surficial aquifers throughout Minnesota remained near average during most of the year. Levels generally rose during the first quarter of the water year but varied from above average in the south-central part of Minnesota to below average throughout the western part. Water levels were stable during winter and rose in response to snowmelt in April and May. Springtime water levels in southern Minnesota continued above average; levels in central and northern Minnesota rose to average or above; levels in the northwest remained below average. Water levels in summer remained near seasonal average throughout the State, rising slightly in July and declining in August and September. Water levels in wells completed in confined aquifers in Minnesota remained near seasonal averages, rising to the highest level in spring and declining to the lowest level in summer. A hydrograph of water levels in a representative observation well is shown, in figure 4 for the period 19^9 to 1982. WATER RESOURCES DATA FOR MINNESOTA, 1982 DEFINITION OF TERMS Terms related to streamflow, water-quality, and other hydrologic data, as used in this report, are defined below. See also table for converting inch-pound units to International System of units (SI) on the inside of the back cover. Acre-foot (AC-FT, acre-ft) is the quantity of water required to cover 1 acre to a depth of 1 foot and is equivalent to 43,560 cubic feet or about 326,000 gallons or 1,233 cubic meters. Adenosine triphosphate (ATP) is the primary energy donor in cellular life process. Its central role in living cells makes it an excellent indicator of the presence of living material in water. A measure of ATP, therefore, provides a sensitive and rapid estimate of biomass. ATP is reported in micrograms per liter of the original water sample. Algae are mostly aquatic single-celled, colonial, or multi-celled plants, containing chloro­ phyll and lacking roots, stems, and leaves. Algal growth potential (AGP) is the maximum algal dry weight biomass that can be produced in a natural water sample under standardized laboratory conditions. The growth potential is the algal biomass present at stationary phase and is expressed as milligrams dry weight of algae produced per liter of sample. Aquifer is a geologic formation, group of formations, or part of a formation that contains sufficient saturated permeable material to yield significant quantities of water to wells and springs. Artesian means confined and is used to describe a well in which the water level stands above the top of the aquifer tapped by the well. A flowing artesian well is one in which the water level is above the land surface. Bacteria are microscopic unicellular organisms, typically spherical, rodlike, or spiral and threadlike in shape, often clumped into colonies. Some bacteria cause disease, others perform an essential role in nature in the recycling of materials; for example, by decomposing organic matter into a form available for reuse by plants. Total coliform bacteria are a particular group of bacteria that are used as indi­ cators of possible sewage pollution. They are characterized as aerobic or facultative anaerobic, gram-negative, nonspore-forming, rod-shaped bacteria which ferment lactose with gas formation within 48 hours at 35°C. In the laboratory these bacteria are defined as the organisms which produce colonies with a golden-green metallic sheet within 24 hours when incubated at 35"C ± 1.0°C on M-Endo medium (nutrient medium for bacterial growth). Their concentrations are expressed as number of colonies per 100 mL of sample. Fecal coliform bacteria are bacteria that are present in the intestine or feces of warmblooded animals. They are often used as indicators of the sanitary quality of the water. In the laboratory they are defined as all organisms which produce blue colonies within 24 hours whien incubated at 44.5°C ± 0.2°C on M-FC medium (nutrient medium for bacterial growth). Their concentrations are expressed as number of colonies per 100 mL of sample. Fecal streptococcal bacteria are bacteria found also in the intestine of warmblooded animals. Their presence in water is considered to verify fecal pollution. They are char­ acterized as gram-positive, cocci bacteria which are capable of growth in brain-heart infusion broth. In the laboratory they are defined as all the organisms which produce red or pink colonies within 48 hours at 355C ± 1.0°C on M-FC medium (nutrient medium for bacterial growth). Their concentrations are expressed as number of colonies per 100 mL of sample. Bed material is the unconsolidated material of which a streambed, lake, pond, reservoir, or estuary bottom is composed. Biochemical oxygen demand (BOD) is a measure of the quantitiy of dissolved oxygen, in milli­ grams per liter, necessary for the decomposition of organic matter by microorganisms, such as bacteria. Biomass is the amount of living matter present at any given time, expressed as the mass per unit area or volume of habitat. Ash mass is the mass or amount of residue present after the residue from the dry mass determination has been ashed in a muffle furnace at a temperature of 500°C for 1 hour. The ash mass values of zooplankton and phytoplankton are expressed in grams per cubic meter (g/m^), and periphyton and benthic organisms in grams per square meter (g/m^). Dry mass refers to the weight of residue present after drying in an oven at 60°C for zooplankton and 105°C for periphyton, until the mass remains unchanged. This mass repre­ sents the total organic matter, ash and sediment, in the sample. Dry mass values are expressed in the same units as ash mass. Organic mass or volatile mass of the living substance is the difference between the dry mass and the ash mass, and represents the actual mass of the living matter. The organic mass is expressed in the same units as for ash mass and dry mass. 6000 05280000 Crow River at Rockford 5600 Drainage area 2520 square miles

5200

4800

4400

4000

3600

3200 O 2800

2400

2000 LU LU U. 1600 CJ CD O 1200 CJ — 800 LU 2 40° 5< o OCT. NOV. DEC. JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEPT THE WATER YEAR YEAR 2000 1800 05304500 Chippewa River near Milan 1600 Drainage area 1870 square miles 1400 1200 1000 800 600 400 200 0 OCT. NOV. DEC. JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEPT. THE WATER YEAR YEAR

Figure 1.—Comparison of discharges at four long-term representative gaging 05385000 Root River near Houston Drainage area 1270 square miles

OCT. NOV. DEC. JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEPT. THE WATER YEAR YEAR O 800 DC 05476000 Des Moines River X 700 at Jackson O Drainage area 1220 square miles <2 600 O 500

400

300

200

100

0 OCT. NOV. DEC. JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEPT. THE WATER YEAR YEAR

EXPLANATION Monthly and yearly mean discharges during 1982 water year

Median of monthly and yearly mean discharges for water years 1951-80

stations for the current year with median discharges for a 30-year base period 220

200

180

QC UJ 160

140 05267OOO Mississippi River QC UJ near Royalton Q. 120 I I I I I I I I I I CO 800 i ui T i r i rri i 05330000 Minnesota River QC 700 near Jordan O EXPLANATION 600 Mean monthly dissolved- solids concentration for 500 period of record (minimum CO of five years) 3 400 O Monthly dissolved-solids CO concentration for 1982 300 O water year UJ 280 05378500 Mississippi River O 260 at Winona CO CO O 240

220

200

180 111

Figure 2."Comparison of dlssolved-sollds concentrations for the current year with mean monthly values for the periods of record SUSPENDED-SEDIMENT LOAD, IN TONS PER DAY 21 o c o o b o o -* o o o • o o o o o o 6> • I • H

I "c • CD m Q. -D X I • •I 3 • a. ! a. • > I J Z H SUSPENDED-SEDIMENT LOAD, IN TONS PER DAY o 8 8 b O b § O o § o 8 8 O o • -. 2 2 * ?

O o O. o 3. o o o DEPTH BELOW LAND SURFACE, IN FEET

3 «Q •te o 4k • I

§ it

x •

CO o

CO

O 00 O o o o WATER RESOURCES DATA FOR MINNESOTA, 1982 Wet mass is the mass of living matter plus contained water. Bottom material: See Bed Material. Cells/volume refers to the number of cells or any organism which is counted by using a microscope and grid or counting cell. Many pianktonic organisms are multicelled and are counted according to the number of contained cells per sample, usually milliliters (mL) or liters (L). Gfs-day is the volume of water represented by a flow of 1 cubic foot per second for 24 hours. It is equivalent to 86,400 cubic feet, approximately 1.9835 acre-feet, or about 646,000 gallons or 2,447 cubic meters. Chemical oxygen demand (COD) is a measure of the chemically oxidizable material in the water, and furnishes an approximation of the amount of organic and reducing material present. The deter­ mined value may correlate with natural water color or with carbonaceous organic pollution from sewage or i-ndustrial wastes. Chlorophyll refers to the green pigments of plants. Chlorophyll _a_ and _b_ are the two most common pigments in plants. Color unit is produced by one milligram per liter of platinum in the form of the chloro- platinate ion. Color is expressed in units of the platinum-cobalt scale. Contents is the volume of water in a reservoir or lake. Unless otherwise indicated, volume is computed on the basis of a level pool and does not include bank storage. Control designates a feature downstream from the gage that determines the stage-discharge relation at the gage. This feature may be a natural constriction of the channel, an artificial structure, or a uniform cross section over a long reach of the channel. Cubic feet per second per square mile (CPSM) is the average number of cubic feet of water flowing per second from each square mile of area drained, assuming that the runoff is distributed uniformly in time and area. Cubic foot per second (PT^/s, ftVs) is the rate of discharge representing a volume of 1 cubic foot passing a given point during 1 second and is equivalent to approximately 7.48 gallons per second or 448.8 gallons per minute or 0.02832 cubic meters per second. Discharge is the volume of water (or more broadly, volume of fluid plus suspended sediment), that passes a given point within a given period of time. Mean discharge (MEAN) is the arithmetic mean of individual daily mean discharges during a specific period. Instantaneous discharge is the discharge at a particular instant of time. Dissolved refers to the amount of substance present in true chemical solution. In practice, however, the term includes all forms of substance that will pass through a 0.45 micrometer memrnbrane filter, and thus may include some very small (colloidal) suspended particles. Analyses are per­ formed on filtered samples. Diversity index is a numerical expression of evenness of distribution of aquatic organisms. The formula for diversity index is:

Where n. is the number of individuals per taxon, n is the total number of individuals, and s is the total number of taxa in the sample of the community. Diversity index values range from zero, when all the organisms in the sample are the same, to some positive number, when some or all of the organisms in the sample are different. Drainage area of a stream at a specified location is that area, measured in a horizontal plane, enclosed by a topographic divide from which direct surface runoff from precipitation normally drains by gravity into the river above the specified point. Figures of drainage area given herein include all closed basins, or noncontributing areas, within the area unless otherwise noted. Drainage basin is a part of the surface of the earth that is occupied by a drainage system, which consists of a surface stream or a body of impounded surface water together with all tributary surface streams and bodies of impounded surface water. Gage height (G.H.) is the water-surface elevation referred to some arbitrary gage datum. Gage height is often used interchangeably with the more general term "stage," although gage height is more appropriate when used with a reading on a gage. Gaging station is a particular site on a stream, canal, lake, or reservoir where systematic observations of hydrologic data are obtained. 10 WATER RESOURCES DATA FOR MINNESOTA, 1982 Hardness of water is a physical-chemical characteristic that is commonly recognized by the increased quantity of soap required to produce lather. It is attributable to the presence of alkaline earths (principally calcium and magnesium) and is expressed as equivalent calcium carbonate (CaC0 3 ). Hydrologic unit is a geographic area rep'resenting part or all of a surface drainage basin or distinct hydrologic feature as delineated by the Office of Water Data Coordination on the State Hydrologic Unit Maps; each hydrologic unit is identified by an 8-digit number. Metamorphic stage refers to the stage of development that an organism exhibits during its transformation from an immature form to an adult form. This developmental process exists for most insects, and the degree of difference from the immature stage to the adult form varies from rela­ tively slight to pronounced, with many intermediates. Examples of metamorphic stages of insects are egg-larva-adult or egg-nymph-adult. Methylene blue active substance (MBAS) is a measure of apparent detergents. This determination depends on the formation of a blue color when methylene blue dye reacts with synthetic detergent compounds. Microgranis per gram (UG/G, ug/g) is a unit expressing the concentration of a chemical element as the mass (micrograms) of the element sorbed per unit mass (gram) of sediment. Micrograms per kilogram (MG/KG, mg/kg) is a unit expressing the concentration of a chemical element as the mass(micrograms) of the element sorbed per unit mass (kilogram) of sediment. Micrograms per liter (UG/L, ug/L) is a unit expressing the concentration of chemical constituents in solution as mass (micrograms) of solute per unit volume (liter) of water. One thousand micrograms per liter is equivalent to one milligram per liter. Milligrams per liter (MG/L, mg/L) is a unit for expressing the concentration of chemical con­ stituents in solution. Milligrams per liter represent the mass of solute per unit volume (liter) of water. Concentration of suspended sediment also is expressed in mg/L, and is based on the mass of sediment per liter of water-sediment mixture. National Geodetic Vertical Datum of 1929 (NGVD) is a geodetic datum derived from a general ad­ justment of the first order level nets of both the United States and Canada. It was formerly called "Sea Level Datum of 1929" or "mean sea level" in this series of reports. Although the datum was de­ rived from the average sea level over a period of many years at 26 tide stations along the Atlantic, Gulf of Mexico, and Pacific Coasts, it does not necessarily represent local mean sea level at any particular place. Organism is any living entity, such as an insect, phytoplankter, or zooplankter. Organism count/area refers to the number of organisms collected and enumerated in a sample and adjusted to the number per area habitat, usually square meters (m ), acres, or hectares. Periphyton benthic organisms, and macrophytes are expressed in these terms. Organism count/volume refers to the number of organisms collected and enumerated in a sample and adjusted to the number per sample volume, usually milliters (mL) or liters (L). Numbers of planktonic organisms can be expressed in these terms. Total organism count is the total number of organisms collected and enumerated in any particular sample. Parameter code numbers are unique five-digit code numbers assigned to each parameter placed into storage. These codes are assigned by the Environmental Protection Agency and are also used to identify data exchanged among agencies. Partial-record station is a particular site where limited streamflow and(or) water-quality data are collected systematically over a period of years for use in hydrologic analyses. Particle size is the diameter, in millimeters (mm), of suspended sediment or bed material de­ termined by either sieve or sedimentation methods. Sedimentation methods (pipet, bottom-withdrawal tube, visual-accumulation tube) determine fall diameter of particles in distilled water (chemically dispersed). Particle-size classification used in this report agrees with recommendations made by the American Geophysical Union Subcommittee on Sediment Terminology. The classification is as follows: Classification Size (mm) Method of analysis Clay 0.00024 - 0.004 Sedimentation. Silt .004 - .062 Sedimentation. Sand .062 - 2.0 Sedimentation or sieve. Gravel 2.0 - 64.0 Sieve. The particle-size distributions given in this report are not necessarily representative of all particles in transport in the stream. Most of the organic material is removed and the sample is subjected to mechanical and chemical dispersion before analysis in distifLled water. 11 WATER RESOURCES DATA FOR MINNESOTA, 1982 Percent composition is a unit for expressing the ratio of a particular part of a sample or population to the total sample or population, in terms of types, numbers, mass or volume. Periphyton is the assemblage of microorganisms attached to and growing upon solid surfaces. While primarily consisting of algae, they also include bacteria, fungi, protozoa, rotifers, and other small organisms. Periphyton is a useful indicator of water quality. Pesticides are chemical compounds used to control undesirable plants and animals. Major cat­ egories of pesticides include insecticides, miticides, fungicides, herbicides, and rodenticides. Insecticides and herbicides, which control insects and plants respectively, are the two categories reported. Picocurie (PC, pCi) is one trillionth (1 x 10~ 12 ) of the amount of radioactivity represented by a curie (Cl). A curie is the amount of radioactivity that yields 3.7 x 10 10 radioactive disintegra­ tions per second. A picocurie yields 2.22 dpm (disintegrations per minute). Plankton is the community of suspended, floating, or weakly swimming organisms that live in the open water of lakes and rivers. Phytoplankton is the plant part of the plankton. They are usually microscopic and their movement is subject to the water currents. Phytoplankton growth is dependent upon solar radiation and nutrient substances. Because they are able to incorporate as well as release materials to the surrounding water, the phytoplankton have a profound effect upon the quality of the water. They are the primary food producers in the aquatic environment, and are commonly known as algae. Blue-green algae are a group of phytoplankton organisms having a blue pigment, in addition to the green pigment called chlorophyll. Blue-green algae often cause nuisance conditions in water. Diatoms are the unicellular or colonial algae having a siliceous shell. Their concentrations are expressed as number of cells/mL of sample. Green algae have chlorophyll pigments similar in color to those of higher green plants. Some forms produce algal mats or floating "moss" in lakes. Their concentrations are expressed as number of cells/mL of sample.

Zooplankton is the animal part of the plankton. Zooplankton are capable of extensive movements within the water column, and are often large enough to be seen with the unaided eye. Zooplankton are secondary consumers feeding upon bacteria, phytoplankton, and detri­ tus. Because they are the grazers in the aquatic environment, the zooplankton are a vital part of the aquatic food web. The zooplankton community is dominated by small crustaceans and rotifers. Polychlorinated biphenyls (PCBs) are industrial chemicals that are mixtures of chlorinated biphenyl compounds having various percentages of chlorine. They are similar in structure to organochlorine insecticides. Primary productivity is a measure of the rate at which new organic matter is formed and accumulated through photosynthetic and chemosynthetic activity of producer organisms (chiefly green plants). The rate of primary production is estimated by measuring the amount of oxygen released (oxygen method) or the amount of carbon assimilated by the plants (carbon method). Milligrams of carbon per area or volume per unit time [mg C/(m ^ ' time) for peri- phyton and macrophytes and mg C/(m^ ' time) for phytoplankton] are units for expressing primary productivity. They define the amount of carbon dioxide consumed as measured by radioactive carbon (carbon 14). The carbon 14 method is of greater sensitivity than the oxygen light and dark bottle method, and is preferred for use in unenriched waters. Unit time may be either the hour or day, depending on the incubation period. Milligrams of oxygen per area or volume per unit time [mg 02/(rc Q ' time) for periphy- ton and macrophytes and mg Og/(m3 * time) for phytoplankton] are the units for expressing primary productivity.They define production and respiration rates as estimated from changes in the measured dissolved oxygen concentration. The oxygen light and dark bottle method is preferred if the rate of primary production is sufficient for accurate measure­ ments to be made within 24 hours. Unit time may be either the hour or day, depending on the incubation period. Recoverable from bottom material is the amount of a given constituent that is in solution after a representative sample of bottom material has been digested by a method (usually using an acid or mixture of acids) that results in dissolution of only readily soluble substances. Complete disso­ lution of all bottom material is not achieved by the digestion treatment and thus the determination represents less than the total amount (that is, less than 95 percent) of the constituent in the sample. To achieve comparability of analytical data, equivalent digestion procedures would be required of all laboratories performing such analyses because different digestion procedures are likely to produce different analytical results. Runoff in inches (IN, in) shows the depth to which the drainage area would be covered if all the runoff for a given time period were uniformly distributed on it. 12 WATER RESOURCES DATA FOR MINNESOTA, 1982 Sediment is solid material that originates mostly from disintegrated rocks and is transported by, suspended in, or deposited from water; it includes chemical and biochemical precipitates and decomposed organic material, such as humus. The quantity, characteristics, and cause of the occur­ rence of sediment in streams are influenced by environmental factors. Some major factors are degree of slope, length of slope, soil characteristics, land usage, and quantity and intensity of precip­ itation. Suspended sediment is the sediment that at any given time is maintained in suspension by the upward components of turbulent currents or that exists in suspension as a colloid. Suspended-sediment concentration is the velocity-weighted concentration of suspended sediment in the sampled zone (from the water surface to a point approximately 0.3 ft above the bed) expressed as milligrams of dry sediment per liter of water-sediment mixture (mg/L). Suspended-sediment discharge (tons/day) is the rate at which dry weight of sediment passes a section of a stream or is the quantity of sediment, as measured by dry weight or volume, that passes a section in a given time. It is computed by multiplying discharge times mg/L times 0.0027. Suspended-sediment load is quantity of suspended sediment passing a section in a specified period. Total sediment discharge (tons/day) is the sum of the suspended-sediment discharge and the bed-load discharge. It is the total quantity of sediment, as measured by dry weight or volume, that passes a section during a given time. Mean concentration is the time-weighted concentration of suspended sediment passing a stream section during a 24-hour day. Solute is any substance derived from the atmosphere, vegetation, soil, or rocks that is dissolved in water. Specific conductance is a measure of the ability of a water to conduct an electrical current. It is expressed in micromhos per centimeter at 25°C. Specific conductance is related to the type and concentration of ions in solution and can be used for appoximating the dissolved-solids content of the water. Commonly, the concentration of dissolved solids (in milligrams per liter) is about 65 percent of the specific conductance (in micromhos). This relation is not constant from stream to stream, and it may vary in the same source with changes in the composition of the water. Stage-discharge relation is the relation between gage height (stage) and volume of water per unit of time, flowing in a channel. Streamflow is the discharge that occurs in a natural channel. Although the term "discharge" can be applied to the flow of a canal, the word "streamflow" uniquely describes the discharge in a surface stream course. The term "streamflow" is more general than "runoff" as streamflow may be applied to discharge whether or not it is affected by diversion or regulation. Substrate is the physical surface upon which an organism lived. Natural substrates refers to any naturally occurring emersed or submersed solid surface, such as a rock or tree, upon which an organism lived. Artificial substrate is a device which is purposely placed in a stream or lake for colonization of organisms. The artificial substrate simplifies the community structure by standardizing the substrate from which each sample is taken. Examples of artificial sub­ strates are basket samplers (made of wire cages filled with clean streamside rocks) and miltiplate samplers (made of hardboard) for benthic organism collection, and plexiglass strips for periphyton collection. Surface area of a lake is that area outlined on the latest USGS topographic map as the boundary of the lake and measured by a planimeter in acres. In localities not covered by topographic maps, the areas are computed from the best maps available at the time planimetered. All areas shown are those for the stage when the planimetered map was made. Surficial bed material is that part (0.1 to 0.2 ft) of the bed material that is sampled using U.S. Series Bed-Material Samplers. i Suspended (as used in tables of chemical analyses) refers to the amount (concentration) of the total concentration in a water-sediment mixture. The water-sediment mixture is associated with (or sorbed on) that material retained on a 0.45 micrometer filter. Suspended, recoverable is the amount of a given constituent that is in solution after the part of a representative water-suspended sediment sample that is retained on a 0.45 urn membrane filter has been digested by a method (usually using a dilute acid solution) that results in dissolution of only readily soluble substances. Complete dissolution of all the particulate matter is not achieved by the digestion treatment and thus the determination represents something less than the "total" amount (that is, less than 95 percent) of the constituent present in the sample. To achieve compar­ ability of analytical data, equivalent digestion procedures would be required of all laboratories performing such analyses because different digestion procedures are likely to produce different analytical results. WATER RESOURCES DATA FOR MINNESOTA, 1982 Determinations of "suspended, recoverable" constituents are made either by analyzing portions of the material collected on the filter or, more commonly, by difference, based on determinations of (1) dissolved and (2) total recoverable concentrations of the constituent. Suspended, total is the total amount of a given constituent in the part of a representative water-suspended sediment sample that is retained on a 0.45 urn membrane filter. This term is used only when the analytical procedure assures measurement of at least 95 percent of the constituent determined. A knowledge of the expected form of the constituent in the sample, as well as the anal­ ytical methodology used, is required to determine when the results should be reported as "suspended, total." Determinations of "suspended, total" constituents are made either by analyzing portions of the material collected on the filter or, more commonly, by difference, based on determinations of (1) dissolved and (2) total concentrations of the constituent. Taxonomy is the division of biology concerned with the classification and naming of organisms. The classification of organisms is based upon a hierarchical scheme beginning with Kingdom and ending with Species at the base. The higher the classification level, the fewer features the organisms have in common. For example, the taxonomy of a particular mayfly, Hexagenia limbata is the following: Kingdom...... Animal Phylum...... Arthropoda Class...... Insects Order...... Ephemeroptera Family...... Ephermeridae Genus...... Hexageria Species Hexagenia limbata Time-weighted average is computed by multiplying the number of days in the sampling period by the concentrations of individual constituents for the corresponding period and dividing the sum of the products by the total number of days. A time-weighted average represents the composition of water that would be contained in a vessel or reservoir that had received equal quantities of water from the stream each day for the year. Tons per acre-foot indicates the dry mass of dissolved solids in 1 acre-foot of water. It is computed by multiplying the concentration in milligrams per liter by 0.00136. Tons per day is the quantity of substance in solution or suspension that passes a stream section during a 24-hour day. Total is the total amount of a given constituent in a representative water-suspended sediment sample, regardless of the constituent's physical or chemical form. This term is used only when the analytical procedure assures measurement of at least 95 percent of the constituent present in both the dissolved and suspended phases of the sample. A knowledge of the expected form of the constitu­ ent in the sample, as well as the analytical methodology used, is required to judge when the results should be reported as "total." (Note that the word "total" does double duty here, indicating both that the sample consists of a water-suspended sediment mixture and that the analytical method determines all of the constituent in the sample.) Total in bottom material is the total amount of a given constituent in a representative sample of bottom material. This term is used only when the analytical procedure assures measurement of at least 95 percent of the constituent determined. A knowledge of the expected form of the constituent in the sample, as well as the analytical methodology used, is required to judge when the results should be reported as "total in bottom material." Total load (tons) is the total quantity of any individual constituent, as measured by dry mass or volume, that is dissolved in a specific amount of water (discharge) during a given time. .It is computed by multiplying the total discharge, times the mg/L of the constituent, times the factor 0.0027, times the number of days. Total recoverable refers to the amount of a given constituent that is in solution after a representative water-suspended sediment sample has been digested by a method (usually using a dilute acid solution) that results in dissolution of only readily soluble substances. Complete dissolution of all particulate matter is not achieved by the digestion treatment, and thus the determination represents something less than the "total" amount (that is, less than 95 percent) of the constituent percent in the dissolved and suspended phases of the sample. To achieve comparability of analytical data, equivalent digestion procedures would be required of all laboratories performing such analyses because different digestion procedures are likely to produce different analytical results. Weighted average is used in this report to indicate discharge-weighted average. It is computed by multiplying the discharge for a sampling period by the concentrations of individual constituents for the corresponding period and dividing the sum of the products by the sum of the discharge. A discharge-weighted average approximates the composition of water that would be found in a reservoir containing all the water passing a given location during the water year after thorough mixing in the reservoir. WDR is used as an abbreviation for "Water-Data Report" in reference to published reports beginning in 1975. WRD is used as an abbreviation for "Water-Resources Data" in the REVISED RECORDS paragraph to refer to State annual basic-data reports published before 1975. WATER RESOURCES DATA FOR MINNESOTA, 1982 WSP is used as an abbreviation for "Water-Supply Paper" in references to previously published reports.

DOWNSTREAM ORDER AND STATION NUMBER Since October 1, 1950, the order of listing hydrologic-station records in Survey reports is in a downstream direction along the main stream. All stations on a tributary entering upstream from a main-stream station are listed before that station. A station on a tributary that enters between two main-stream stations is listed between them. A similar order is followed in listing stations on first rank, second rank, and other ranks of tributaries. The rank of any tributary on which a sta­ tion is situated with respect to the stream to which it is immediately tributary is indicated by an indention in a list of stations in the front of the report. Each indention represents one rank. This downstream order and system of indention show which stations are on tributaries between any two stations and the rank of the tributary on which each station is situated. As an added means of identification, each hydrologic station and partial-record station has been assigned a station number. These are in the same downstream order used in this report. In as­ signing station numbers, no distinction is made between partial-record stations and other stations; therefore, the station number for a partial-record station indicates downstream-order position in a list made up of both types of stations. Gaps are left in the series of numbers to allow for new stations that may be established; hence, the numbers are not consecutive. The complete 8-digit num­ ber for each station such as 05041000, which appears just to the left of the station name, includes the 2-digit part number "05" plus the 6-digit downstream order number "041000".

NUMBERING SYSTEM FOR WELLS AND MISCELLANEOUS SITES The 8-digit downstream order station numbers are not assigned to wells and miscellaneous sites where only random water-quality samples or discharge measurements are taken. The well and miscellaneous site numbering system of the U.S. Geological Survey is based on the grid system of latitude and longitude. The system provides the geographic location of the well or miscellaneous site and a unique number for each site. The number consists of 15 digits. The first 6 digits denote the degrees, minutes, and seconds of latitude, the next 7 digits denote degrees, minutes, and seconds of longitude, and the last 2 digits (assigned sequentially) identify the wells or other sites within a 1-second grid. See figure 5 below. Each well site is also identified by a local well number which consists of township, range, and section numbers, three letters designating 1/4, 1/4, 1/4 section location, and a two digit sequential number.

45°17'43"

Coordi nates for well B Coordinates for well (451742093122102) (451742093122101)

Figure 5.—Example of system for numbering wells and miscellaneous sites

SPECIAL NETWORKS AND PROGRAMS Hydrologic bench-mark station is one that provides hydrologic data for a basin in which the hydrologic regimen will likely be governed solely by natural conditions. Data collected at a bench­ mark station may be used to separate effects of natural from manmade changes in other basins which have been developed and in which the physiography, climate, and geology are similar to those in the undeveloped bench-mark basin. National stream-quality accounting network (NASQAN) is a data collection network designed by the U.S. Geological Survey to meet many of the information demands of agencies or groups involved in national or regional water-quality planning and management. Both accounting and broad-scale moni­ toring objectives have been incorporated into the network design. Areal configuration of the network is based on river-basin accounting units (identified by 8-digit hydrologic-unit numbers) designated by the Office of Water Data Coordination in consultation with the Water Resources Council. Primary objectives of the network are (1) to depict areal variability of streamflow and water-quality conditions nationwide on a year-by-year basis and (2) to detect and assess long-term changes in streamflow and stream quality. 15 WATER RESOURCES DATA FOR MINNESOTA, 1982 Pesticide program is a network of regularly sampled water-quality stations where samples are collected to determine the concentration and distribution of pesticides in streams where potential contamination could result from the application of the commonly used insecticides and herbicides. Operation of the network is a Federal interagency activity. Radiochemical program is a network of regularly sampled water-quality stations where samples are collected to be analyzed for radiosotopes. The streams that are sampled represent major drainage basins in the conterminous United States. Tritium network is a network of stations which has been established to provide base line infor­ mation on the occurrence of tritium in the Nation's surface waters. In addition to the surface- water stations in the network, tritium data are also obtained at a number of precipitation stations. The purpose of the precipitation stations is to provide an estimate sufficient for hydrologic studies of the tritium input to the United States.

EXPLANATION OP STAGE AND WATER-DISCHARGE RECORDS

COLLECTION AND COMPUTATION OF DATA The base data collected at gaging stations consist of records of stage and measurements of discharge of streams or canals, and stage, surface area, and contents of lakes or reservoirs. In addition, observations of factors affecting the stage-discharge relation or the stage-capacity relation, weather records, and other information are used to supplement base data in determining the daily flow or volume of water in storage. Records of stage are obtained from either direct readings on a nonrecording gage or from a water-stage recorder that gives either a continuous graph of the fluctuations or a tape punched at selected time intervals. Measurements of discharge are made with a current meter, using the general methods adopted by the Geological Survey. These methods are de­ scribed in standard text-books, in Water-Supply Paper 888, and in U.S. Geological Survey Techniques of Water-Resources Investigations, book 3, chapter A6. For stream-gaging stations, rating tables giving the discharge for any stage are prepared from stage-discharge relation curves. If extensions to the rating curves are necessary to express dis­ charge greater than measured, they are made on the basis of indirect measurements of peak discharge (such as slope-area or contracted-opening measurements, computation of flow over dams or weirs), step-backwater techniques, velocity-area studies, and logarithmic plotting. The daily mean dis­ charge is computed from gage heights and rating tables, then the monthly and yearly mean discharges are computed from the daily figures. If the stage-discharge relation is subject to change because of frequent or continual change in the physical features that form the control, the daily mean dis­ charge is computed by the shifting-control method, in which correction factors based on individual discharge measurements and notes by hydrologists and observers are used in applying the gage heights to the rating tables. If the stage-discharge relation for a station is temporarily changed by the presence of aquatic growth or debris on the control, the daily mean discharge is computed by what is basically the shifting-control method. At some stream-gaging stations the stage-discharge relation is affected by the backwater from reservoirs, tributary streams, or other sources. This necessitates the use of the slope method in which the slope or fall in a reach of the stream is a factor in computing discharge. The slope or fall is obtained by means of an auxiliary gage set at some distance from the base gage. At some stations the stage-discharge relation is affected by changing stage; at these stations the rate of change in stage is used as a factor in computing discharge. At some northern stream-gaging stations the stage-discharge relation is affected by ice in the winter, and it becomes impossible to compute the discharge in the usual manner. Discharge for periods of ice effect is computed on the basis of gage-height record and occasional winter discharge measurements. Consideration is given to the available information on temperature and precipitation, notes by gage observers and hydrologists, and comparable records of discharge for other stations in the same or nearby basins. For a lake or reservoir station, capacity tables giving the contents for any stage are prepared from stage-area relation curves defined by surveys. The application of the stage to the capacity table gives the contents, from which the daily, monthly, or yearly change in contents is computed. If the stage-capacity curve is subject to changes because of deposition of sediment in the reservoir, periodic resurveys of the reservoir are necessary to define new stage-capacity curves. During the period between reservoir surveys the computed contents may be increasingly in error due to the gradual accumulation of sediment. For some gaging stations there are periods when no gage-height record is obtained or the re­ corded gage height is so faulty that it cannot be used to compute daily discharge or contents. This happens when the recorder stops or otherwise fails to operate properly, intakes are plugged, the float is frozen in the well, or for various other reasons. For such periods the daily discharges are estimated on the basis of recorded range-in-stage, prior and subsequent records, discharge measurements, weather records, and comparison with records for other stations in the same or nearby basins. Likewise daily contents may be estimated on the basis of operator's log, prior and subsequent records, inflow-outflow studies, and other information. The data in this report generally comprise a description of the station and tabulations of daily and monthly figures. For gaging stations on streams or canals a table showing the daily discharge and monthly and yearly discharge is given. For gaging stations on lakes and reservoirs a 16 WATER RESOURCES DATA FOR MINNESOTA, 1982 monthly summary table of stage and contents or a table showing the daily contents is given. Tables of daily mean gage heights are included for some streamflow stations and for some reservoir sta­ tions. Records are published for the water year, which begins on October 1 and ends on September 30. The description of the gaging station gives the location, drainage area, period of record, notations of revisions of previously published records, type and history of gages, general remarks, average discharge, and extremes of discharge or contents. The location of the gaging station and the drainage area are obtained from most accurate maps available. River mileage, given under "LOCATION" for some stations, is that determined and used by the Corps of Engineers or other agencies. Periods for which there are published records for the present station or for stations generally equivalent to the present one are given under "PERIOD OF RECORD." Previously published streamflow records of some stations have been found to be in error on the basis of data or information later obtained. Revisions of such records are usually published along with the current records in one of the annual or compilation reports. In order to make it easier to find such revised records, a paragraph headed "REVISED RECORDS" has been added to the description of all stations for which revised records have been published. Listed herein are all the reports in which revisions have been published, each followed by the water years for which figures are revised in that report. In listing the water years only one number is given; for instance, 1965 stands for the water year October 1, 1964, to September 30, 1965. If no daily, monthly, or annual figures of discharge are affected by the revision, the fact is brought out by notations after the year dates as follows: "(M)" means that only the instantaneous maximum discharge was revised; "(m)" that only the instantaneous minimum was revised; and "(P)" that only peak discharges were revised. If the drain­ age area has been revised, the report in which the revised figure was first published is given. It should be noted that for all stations for which cubic feet per second per square mile and runoff in inches are published, a revision of the drainage area necessitates corresponding revision of all figures based on the drainage area. Revised figures of cubic feet per second per square mile and runoff in inches resulting from a revision of the drainage area only are usually not published in the annual series of reports. The type of gage currently in use; the datum of the present gage referred to National Geodetic Vertical Datum; and a condensed history of the types, locations, and datums of previous gages used during the period of record are given under "GAGE." National Geodetic Vertical Datum is explained in "DEFINITION OF TERMS." Information pertaining to the accuracy of the discharge records and to conditions which affect the natural flow of the gaging station is given under "REMARKS." For reservoir stations, informa­ tion on the dam forming the reservoir, the capacity, outlet works and spillway, and purpose and use of the reservoir is given under "REMARKS." The average discharge for the number of years indicated is given under "AVERAGE DISCHARGE"; it is not given for stations having fewer than 5 complete years of record or for stations where changes in water development during the period of record cause the figure to have little significance. In addition, the median of yearly mean discharges is given for stream-gaging stations having 10 or more complete years of record if the median differs from the average by more than 10 percent. Under "EXTREMES" are given first, the extremes for the period of record, second, information available outside the period of record, and last, those for the current year. Unless otherwise qualified, the maximum discharge (or contents) is the instantaneous maximum corresponding to the crest stage obtained by use of a water-stage recorder (graphic or digital), a crest-stage gage, or a nonrecord- ing gage read at the time of crest. If the maximum gage height did not occur on the same day as the maximum discharge (or contents), it is given separately. Similarly, the minimum is the instantaneous minimum unless otherwise qualified. For some stations, peak discharges are listed with "EXTREMES FOR CURRENT YEAR". If they are, all independent peaks above the selected base are published in tabular format with the time of occurrence and corresponding gage heights, including the maximum for the year. The base discharge, which is given in the table heading, is selected so that an average of about three peaks a year will be presented. Peak discharges are not published for any canals, ditches, drains, or for any stream for which the peak's are subject to substantial control by man. Time of day is expressed in 24-hour local standard time; for example, 12:30 a.m. is 0030, 1:30 p.m. is 1330. The minimums for these stations are published in a separate paragraph following the table of peaks. The daily table for stream-gaging stations gives the mean discharge for each day and is fol­ lowed by monthly and yearly summaries. In the monthly summary below the daily table, the line headed "TOTAL" gives the sum of the daily figures. The line headed "MEAN" gives the average flow in cubic feet per second during the month. The lines headed "MAX" and "MIN" give the maximum and mini­ mum daily discharges, respectively, for the month. Discharge for the month also may be expressed in cubic feet per second per square mile (line headed "CFSM"), or in inches (line headed "IN"), or in acre-feet (line headed "AC-FT"). Figures for cubic feet per second per square mile and runoff in inches are omitted if there is extensive regulation or diversion, if trie drainage area includes large noncontributing areas, or if the average annual rainfall over the| drainage basin is usually less than 20 inches. In the yearly summary below the monthly summary, the figures shown are the appropriate daily discharges for the calendar and water years.

Footnotes to the table of daily discharge are introduced by the word "NOTE". Footnotes are used to indicate periods for which the discharge is computed or estimated by special methods because of no gage-height record, backwater from various sources, or other unusual conditions. Periods of no gage-height record are indicated if the period is continuous for a month or more or includes the maximum discharge for the year. Periods of backwater from an unusual source, of indefinte stage- discharge relation, or of any other unusual condition at the gage site are indicated only if they 17 WATER RESOURCES DATA FOR MINNESOTA, 1982 are a month or more in length and the accuracy of the records is affected. Days on which the stage- discharge relation is affected by ice are not indicated. The methods used in computing discharge for various unusual conditions have been explained in preceding paragraphs. For most gaging stations on lakes and reservoirs the data presented comprise a description of the station and a monthly summary table of stage and contents. For some reservoirs a table showing daily contents or stage is given. Data collected at partial-record stations follow the information for continuous record sites. Data for partial-record discharge stations are presented in two tables. The first is a table of dis­ charge measurements at low-flow partial-record stations, and the second is a table of annual maximum stage and discharge at crest-stage stations. The tables of partial-record stations are followed by a listing of discharge measurements made at sites other than continuous-record or partial-record stations. Occasionally, a series of discharge measurements are made within a short time period to investigate the seepage gains or losses along a reach of a stream or to determine the low-flow char­ acteristics of an area. Such measurements are also given in special tables following the tables of partial-record stations.

ACCURACY OF FIELD DATA AND COMPUTED RESULTS The accuracy of streamflow data depends primarily on (1) the stability of the stage-discharge relation or, if the control is unstable, the frequency of discharge measurements, and (2) the accuracy of observations of stage, measurements of discharge, and interpretations of records. The station description under "REMARKS" states the degree of accuracy of the records. "Excel­ lent" means that about 95 percent of the daily discharges are within 5 percent; "good," within 10 percent; and "fair," within 15 percent. "Poor" means that daily discharges have less than "fair" accuracy. Figures of daily mean discharge in this report are shown to the nearest hundredth of a cubic foot per second for discharges of less than 1 ft^/s; to tenths between 1.0 and 10 ft^/s; to whole numbers between 10 and 1,000 ftVs; and to 3 significant figures above 1,000 ftVs. The number of significant figures used is based solely on the magnitude of the figure. The same rounding rules apply to discharge figures listed for partial-record stations. Discharge at many stations, as indicated by the monthly mean, may not reflect natural runoff due to the effects of diversion, consumption, regulation by storage, increase or decrease in evapor­ ation due to artificial causes, or to other factors. For such stations, figures of cubic feet per second per square mile and of runoff in inches are not published unless satisfactory adjustments can be made for diversions, for changes in contents of reservoirs, or for other changes incident to use and control. Evaporation from a reservoir is not included in the adjustments for changes in reser­ voir contents, unless it is so stated. Even at those stations where adjustments are made, large errors in computed runoff may occur if adjustments or losses are large in comparison with the observed discharge.

OTHER DATA AVAILABLE Information of a more detailed nature than that published for most of the gaging stations such as observations of water temperatures, discharge measurements, gage-height records, and rating tables is on file in the district office. Also most gaging-station records are available in computer-usable form and many statistical analyses have been made. Information on the availability of unpublished data or statistical analyses may be obtained from the district office.

RECORDS OF DISCHARGE COLLECTED BY AGENCIES OTHER THAN THE GEOLOGICAL SURVEY The National Water Data Exchange, Water Resources Division, U.S. Geological Survey, National Center, Reston, VA 22092, maintains an index of all discharge measurement sites in the State. Information on records available at specific sites can be obtained upon request.

EXPLANATION OP WATER-QUALITY RECORDS COLLECTION AND EXAMINATION OF DATA Surface-water samples for analyses usually are collected at or near gaging stations. The quality-of-water records are given immediately following the discharge records at these stations. The descriptive heading for water-quality records gives the period of record for all water- quality data, the period of daily record for parameters that are measured on a daily basis (specific conductance, pH, dissolved oxygen, water temperature, sediment discharge, etc.), extremes for the period of daily record, extremes for the current year, and general remarks. For ground-water records, no descriptive statements are given; however, the well number, depth of well, date of sampling and (or) other pertinent data are given in the table containing the chemical analyses of the ground water. 18 WATER RESOURCES DATA FOR MINNESOTA, 1982

WATER ANALYSIS Most methods for collecting and analyzing water samples are described in the U.S. Geological Survey Techniques of Water-Resources Investigations listed on a following page. One sample can define adequately the water quality at a given time if the mixture of solutes throughout the stream cross section is homogeneous. However, the concentration of solutes at dif­ ferent locations in the cross section may vary widely with different rates of water discharge, depending on the source of material and the turbulence and mixing of the stream. Some streams must be sampled through several vertical sections to obtain a representative sample needed for an accurate mean concentration and for use in calculating load. Chemical-quality data published in this report are considered to be the most representative values available for the stations listed. The values reported represent water-quality conditions at the time of sampling as much as possible, consistent with available sampling techniques and methods of analysis. In the rare case where an apparent inconsistency exists between a reported pH value and the relative abundance of carbon dioxide species (carbonate and bicarbonate), the inconsistency is the result of a slight uptake of carbon dioxide from the air by the sample between measurement of pH in the field and determination of carbonate and bicarbonate in the laboratory. For chemical-quality stations equipped with digital monitors, the records consist of daily maximum, minimum, and mean values for each constituent measured and are based upon hourly punches beginning at 0100 hours and ending at 2400 hours for the day of record. More detailed records (hourly values) may be obtained from the district office. WATER TEMPERATURE Water temperatures are measured at most of the water-quality stations. In addition, water temperatures are taken at time of discharge measurements for water-discharge stations. For stations where water temperatures are taken manually once or twice daily, the water temperatures are taken at about the same time each day. Large streams have a small daily temperature change; shallow streams may have a daily range of several degrees and may follow closely the changes in air temperature. Some streams may be affected by waste-heat discharges. At stations where recording instruments are used, either mean temperatures or maximum and minimum temperatures for each day are published. SEDIMENT Suspended-sediment concentrations are determined from samples collected by using depth- integrating samplers. Samples usually are obtained at several verticals in the cross section, or a single sample may be obtained at a fixed point and a coefficient applied to determine the mean con­ centration in the cross sections. During periods of rapidly changing flow or rapidly changing concentraiton, samples may have been collected more frequently (twice daily or, in some instances, hourly). The published sediment discharges for days of rapidly changing flow or concentration were computed by the subdivided-day method (time-discharge weighted average). Therefore, for those days when the published sediment discharge value differs from the value computed as the product of discharge times mean concentration times 0.0027, the reader can assume that the sediment discharge for that day was computed by the subdivided-day method. For periods when no samples were collected, daily loads of suspended sedi­ ment were estimated on the basis of water discharge, sediment concentrations observed immediately before and after the periods, and suspended-sediment loads for other periods of similar discharge. At other stations, suspended-sediment samples were collected periodically at many verticals in the stream cross section. Although data collected periodically may represent conditions only at the time of observations, such data are useful in establishing seasonal relations between quality and streamflow in predicting long-term sediment-discharge characteristics of the stream. In addition to the records of the quantities of suspended sediment, records of the periodic measurements of the particle-size distribution of the suspended sediment and bed material are included.

EXPLANATION OP GROUND-WATER LEVEL RECORDS

COLLECTION OF THE DATA Only ground-water level data from a basic network of observation wells are published herein. This basic network contains observation wells so located that the most significant data are obtained from the fewest wells in the most important aquifers. Each well is identified by means of (1) a 15-digit number that is based on latitude and longitude and (2) a local number that is provided for local needs. See figure 5. Measurements are made in many types of wells, under varying conditions of access and at dif­ ferent temperatures, hence, neither the method of measurement nor the equipment can be standardized. At each observation well, however, the equipment and techniques used are those that will ensure that measurements at each well are consistent. 19 WATER RESOURCES DATA FOR MINNESOTA, 1982 Water-level measurements In this report are given in feet with reference to either NGVD of 1929 or land-surface datum (Isd). NGVD of 1929 is the datum plane on which the national network of pre­ cise levels is based; land-surface datum is a datum plane that is approximately at land surface at each well. If known, the altitude of the land-surface datum in NGVD of 1929 is given in the well description. The height of the measuring point (MP) above or below land-surface datum is given in each well description. Water levels in wells equipped with recording gages are reported for every fifth day and the end of each month (eom). Water levels are reported to as many significant figures as can be justified by the local con­ ditions. For example, in a measurement of a depth to water of several hundred feet, the error in determining the absolute value of the total depth to water may be a few tenths of a foot, whereas the error in determining the net change of water level between successive measurements may be only a hundredth or a few hundredths of a foot. For lesser depths to water the accuracy is greater. Ac­ cordingly, most measurements are reported to a hundredth of a foot, but some are given only to a tenth of a. foot or a larger unit. Hydrographs showing water-level fluctuations are included for 56 representative wells; 16 bed­ rock, 33 surficial sand, and 7 buried sand wells. -—48°

90"

1^4098 Volume 1 Volume 2

46°- 46°

529100 5292000 EXPLANATION 5293 45031709 Stream gage Lake gage

Major drainage basin divide

Base from U. S. Geological Survey SO HUES Minnesota state base map. 1:1,000,000 0 10 20 30 40 SO SO KILOMETERS

Figure 6."Location of water-discharge stations 97° 49°-

-48°

90"

5054 Moorheticf 46"

EXPLANATION

Water—quality and (or) sediment station

Major drainage basin divide

Base from U. S. Geological Survey 50 MILES Minnesota state base map, 1:1,000.000 0 10 20 30 40 50 60 KILOMETERS

Figure 7."Location of water-quality stations PUBLICATIONS ON TECHNIQUES OF WATER-RESOURCES INVESTIGATIONS

Thirty-seven manuals by the U.S. Geological Survey have been published to date in the series on techniques describing procedures for planning and executing specialized work in water-resources investigations. The material is grouped under major subject headings called books and is further divided into sections and chapters. For example, Section A of Book 3 (Applications of Hydraulics) is on surface water. The chapter, the unit of publication, is limited to a narrow field of subject matter. This format permits flexibility in revision and publication as the need arises. The reports listed below are for sale by the U.S. Geological Survey, Branch of Distribution, 604 South Pickett St., Alexandria, VA 22304 (authorized agent of the Superintendent of Documents, Government Printing Office).

NOTE: When ordering any of these publications, please give the title, book number, chapter number, and "U.S. Geological Survey Techniques of Water-Resources Investigations".

1-D1. Water temperature--influential factors, field measurement, and data presentation, by H. H. Stevens, Jr., J. F. Ficke, and G. F. Smoot: USGS--TWRI Book 1, Chapter 01. 1975. 65 pages. 1-02. Guidelines for collection and field analysis of ground-water samples for selected unstable constituents, by W. W. Wood: USGS—TWRI Book 1, Chapter D2. 1976. 24 pages. 2-D1. Application of surface geophysics to ground-water investigations, by A. A. R. Zohdy, 6. P. Eaton, and D. R. Mabey: USGS--TWRI Book 2, Chapter Dl. 1974. 116 pages. 2-E1. Application of borehole geophysics to water-resources investigations, by W. S. Keys and L. M. MacCary: USGS—TWRI Book 2, Chapter El. 1971. 126 pages. 3-Al. General field and office procedures for indirect discharge measurements, by M. A. Benson and Tate Dalrymple: USGS--TWRI Book 3, Chapter Al. 1967. 30 pages. 3-A2. Measurement of peak discharge by the slope-area method, by Tate Dalrymple and M. A. Benson: USGS--TWRI Book 3, Chapter A2. 1967. 12 pages. 3-A3. Measurement of peak discharge at culverts by indirect methods, by G. L. Bodhaine: USGS--TWRI Book 3, Chapter A3. 1968. 60 pages. 3-A4. Measurement of peak discharge at width contractions by indirect methods, by H. F. Matthai: USGS--TWRI Book 3, Chapter A4. 1967. 44 pages. 3-A5. Measurement of peak discharge at dams by indirect methods, by Harry Hulsing: USGS—TWRI Book 3, Chapter A5. 1967. 29 pages. 3-A6. General procedure for gaging streams, by R. W. Carter and Jacob Davidian: USGS--TWRI Book 3, Chapter A6. 1968. 13 pages. 3-A7. Stage measurements at gaging stations, by T. J. Buchanan and W. P. Somers: USGS--TWRI Book 3, Chapter A7. lg68. 28 pages. 3-A8. Discharge measurements at gaging stations, by T. J. Buchanan and W. P. Somers: USGS—TWRI Book 3, Chapter A8. 1969. 65 pages. 3-A9. Measurement of time of travel and dispersion in streams by dye tracing, by E. F. Hubbard, F. A. Kilpatrick, L. A. Martens, and J. F. Wilson, Jr.: USGS--TWRI Book 3, Chapter A9. 1982. 44 pages. 3-A11. Measurement of discharge by moving-boat method, by G. F. Smoot and C. E. Novak: USGS--TWRI Book 3, Chapter All. 1969. 22 pages. 3-B1. Aquifer-test design, observation, and data analysis, by R. W. Stallman: USGS--TWRI Book 3, Chapter Bl. 1971. 26 pages. 3-B2. Introduction to ground-water hydraulics, a programed text for self-instruction, by G. D. Bennett: USGS—TWRI Book 3, Chapter B2. 1976. 172 pages. 3-B3. Type curves for selected problems of flow to wells in confined aquifers, by J. E. Reed: USGS--TWRI Book 3, Chapter B3. 1980. 106 pages. 3-C1. Fluvial sediment concepts, by H. P. Guy: USGS--TWRI Book 3, Chapter Cl. 1970. 55 pages. 3-C2. Field methods for measurement of fluvial sediment, by H. P. Guy and V. W. Norman: USGS--TWRI Book 3, Chapter C2. 1970. 59 pages. 3-C3. Computation of fluvial-sediment discharge, by George Porterfield: USGS--TWRI Book 3, Chapter C3. 1972. 66 pages. 4-A1. Some statistical tools in hydrology, by H. C. Riggs: USGS--TWRI Book 4, Chapter Al. 1968. 39 pages. 4-A2. Frequency curves, by H. C. Riggs: USGS--TWRI Book 4, Chapter A2. 1968. 15 pages. 4-B1. Low-flow investigations, by H. C. Riggs: USGS--TWRI Book 4, Chapter Bl. 1972. 18 pages. 4-B2. Storage analyses for water supply, by H. C. Riggs and C. H. Hardison: USGS--TWRI Book 4, Chapter B2. 1973. 20 pages. 4-B3. Regional analyses of streamflow characteristics, by H. C. Riggs: USGS--TWRI Book 4, Chapter B3. 1973. 15 pages. 4-D1. Computation of rate and volume of stream depletion by wells, by C. T. Jenkins: USGS—TWRI Book 4, Chapter Dl. 1970. 17 pages. 5-Al. Methods for determination of inorganic substances in water and fluvial sediments, by M. W. Skougstad and others, editors: USGS—TWRI Book 5, Chapter Al. 1979. 626 pages. 5-A2. Determination of minor elements in water by emission spectrescopy, by P. R. Barnett and E. C. Mallory, Jr.: USGS—TWRI Book 5, Chapter A2. 1971. 31 pages. 5-A3. Methods for analysis of organic substances in water, by D. F. Goerlitz and Eugene Brown: USGS—TWRI Book 5, Chapter A3. 1972. 40 pages. _ I 5-A4. Methods for collection and analysis of aquatic biological and microbiological samples, edited by P. E. Greeson, T. A. Ehlke, G. A. Irwin, B. W. Lium, and K. V. Slack: USGS—TWRI Book 5, Chapter A4. 1977. 332 pages. 5-A5. Methods for determination of radioactive substances in water and fluvial sediments, by L. i. Thatcher, V. J. Janzer, and K. W. Edwards: USGS--TWRI Book 5, Chapter A5. 1977. 95 pages. 5-C1. Laboratory theory and methods for sediment analysis, by H. P. Guy: USGS—TWRI Book 5, Chapter Cl. 1969. 58 pages. 7-C1. Finite difference model for aquifer simulation in two dimensions with results of numerical experiments, by P. C. Trescott, G. F. Pinder, and S. P. Larson: USGS--TWRI Book 7, Chapter Cl. 1976. 116 pages. 7-C2. Computer model of two-dimensional solute transport and dispersion in ground water, by L. F. Konikow and J. D. Bredehoeft: USGS—TWRI Book 7, Chapter C2. 1978. 90 pages. 7-C3. A model for simulation of flow in singular and interconnected channels, by R. W. Schaffranek, R. A. Baltzer, and D. E. Goldberg: USGS—TWRI Book 7, Chapter C3. 1981. 110 pages. 8-A1. Methods of measuring water levels in deep wells, by M. S. Garber and F. C. Koopman: USGS-- TWRI Book 8, Chapter Al. 1968. 23 pages 8-B2. Calibration and maintenance of vertical-axis type current meters, by G. F. Smoot and C. E. Novak: USGS—TWRI Book 8, Chapter B2. 1968. 15 pages. 25 DISCONTINUED GAGING STATIONS The following continuous-record streamflow or stage stations in Minnesota have been discontinued or converted to partial-record stations. Daily streamflow or stage records were collected and published for the period of record shown for each station Station Drainag Period of number Station name area (mi record Upper Mississippi River basin 05210000 Mississippi River near Deer River, MN a3,190 1945-50 *05213000 Prairie River near Grand Rapids, MN 485 1909t, 1925-49 05216800 O'Brien Creek near Pengilly, MN 1963-68 05217000 Swan River near Warba, MN 254 1954-69 05217500 Swan River near Swan River, MN a290 1929 05218000 Mississippi River above Sandy River near Libby (above 4,560 1895-1915, Sandy River), MN 1925-29 05221000 Willow River near Palisade, MN 442 1929 05226200 Ripple (Mud) River near Wealthwood, MN 1937-39 05232000 Pelican Brook (Long Lake) near Pequot Lakes, MN 1938-42, 1943-47 05241500 Rabbit River near Crosby, MN 8.38 1945-63 05242700 Little Sand Lake outlet (Sand Lake outlet) near Dorset, MN a74 1930-41 *05244000 Crow Wing River at Nimrod, MN alOlO 1910-14, 1930-31 05244500 Crow Wing River at Motley, MN a2,l40 1909t, 1913-17, 1930-31 05244980 Diversion from Long Prairie River near Osakis, MN 1939-47 05245000 Long Prairie River near Osakis, MN 1949-54 05245500 Long Prairie River near Motley, MN 973 1909-17, 1930-31 05246000 Crow Wing River at Pillager a3,230 1903t, 1909-13, 1925-50 *0526lOOO Mississippi River near Port Ripley, MN all,010 1906, 1909-10, 1929 05261500 Nokasippi River near Port Ripley, MN 210 1929 *05268000 Platte (Platt) River at Royalton, MN 338 1929-36 05269000 Mississippi River near Sauk Rapids, MN a!2,400 1903-06 05270000 Mississippi River at Sartell, MN a!2,450 1929,

05270500 Sauk River near St. Cloud, MN 925 1909-12, 1913, 1929. 1930. 1931. 1932. 1933. 1934-81 05273500 Clearwater River at Clearwater, MN 1937, 1940-42 05274500 Elk River above St. Francis River near Big Lake, MN 384 1929 05274700 St. Francis River at Santiago, MN 1965-70, 1980-81 05274900 St. Francis River near Big Lake, MN 1965-70 05275500 Mississippi River at Elk River, MN al4,500 1915-56 05276000 North Fork Crow River near Regal, MN 215 1943-54 05277000 Middle Fork Crow River at New London, MN 1939-42, 1943-47 "See footnotes at end of table. 1 26 DISCONTINUED GAGING STATIONS Station Drainage Period of number Station name area (ml ) record Upper Mississippi River basln--Continued 05277500 Middle Fork Crow River (Calhoun Lake Diversion) near - 1939, Spicer, MN 1940-46 05278400 North Pork Crow River near Rockford, MN - 1909-10 05278500 South Pork Crow River at Cosmos, MN 221 1945-64 05278930 Buffalo River near Glencoe, MN 374 1972-80 *05279000 South Pork Crow River near Mayer, MN al,170 1934-79 05279500 South Pork Crow River near Rockford, MN al,250 1909-12 05283500 Mississippi River at Anoka, MN a!7,100 1897, 1905-13 05284500 Rum River at Onamia, MN 414 1910-12 05284750 Rum River at Spencer Brook, MN - 1960-64 05285000 Rum River at Cambridge, MN al,l60 1909-14 05285500 Rum River at St. Francis, MN - 1903 05286500 Rum River near Anoka, MN 1,430 1905-06, 1909 05289000 Mlnnetonka Lake (head of Minnehaha Creek) near Wayzata (at Excelsior), MN - 1938-64 05289500 Minnehaha Creek at Mlnnetonka Mills, MN 130 1953-64 Minnesota River basin 05290000 Little Minnesota River near Peever, SD 447 1939-81 05292500 Minnesota River near Odessa, MN al,340 1909-12, 1944-63 05293500 Pomme de Terre River near Morris, MN - 1937-39, 1940-47 05299500 Canby Creek at Canby, MN - 1938-39, 1940-46 05300500 Ten Mile Creek near Boyd, MN 82.8 1949-51 05302000 Little Chippewa River near Lowry, MN a54 1941 *05302500 Little Chippewa River near Starbuck, MN 111 1938-39 05303000 Chippewa River at diversion dam near Hancock, MN - 1930-39, 1940-46 05303500 Chippewa River at,Benson, MN al,270 1949-51 05304000 Shakopee Creek near Benson, MN 352 1949-54 05305000 Chippewa River near Watson, MN a2,050 1910-17, 1931-36 *05311400 South Branch Yellow Medicine River at Mlnneota, MN alll 1960-81 053H500 Yellow Medicine River near Cottonwood, MN 465 1945-46 05312000 Spring Creek near Clarkfield, MN a89 1945-46 05312500 Spring Creek near Hazel Run, MN 101 1945-48 05313000 Yellow Medicine River near Hanley Falls, MN 606 1945-47 05313521 Hawk Creek at outlet of Eagle Lake near Wlllmar, 'IN - 1972-73 05313560 Eagle Lake tributary No. 7 near Wlllmar, MN - 1972-73 05313570 Eagle Lake tlbutary No. 8 near Willmar, MN - 1972-73 05314000 Chetomba Creek near Maynard, MN a200 1949-51 *05314500 Hawk Creek near Maynard, MN 474 1949-54 *05315200 Prairie Ravine near Marshall, MN 5.63 1959-64 05315500 Redwood River near Green Valley, MN 436 1945-57 'See footnotes at end of table.' 27 DISCONTINUED GAGIMl STATIONS Station Drainage Period of number Station name area (mi ) record Minnesota River basin--Continued 05316000 Redwood River near Seaforth, MN 573 1945-46 05316770 Minnesota River at New [Jim, MN 9,536 1968-76 05317500 Minnesota River at Judson, MN all, 200 1938-50 *053l8000 East Branch (East Pork) Blue Earth River near Bricelyn, MN 132 1951-70 05319000 South Pork Watonwan River at diversion dam near St. James, MN - 1939, 1940-46 05321000 Blue Earth River at Mankato, MN a3,550 1938-39, 1940-42 05330400 Sand Creek at diversion dam near Jordan, MN 1938-39, 1940-46 05330800 Purgatory Creek at Eden Prairie, MN - 1975-80 05330900 Nine Mile Creek at Bloomington, MN - 1963-73

St. Croix River basin *05336200 Glaisby Brook near Kettle River, MN 24.2 1959-70 05336500 Kettle River near Sandstone, MN 825 1908-16 05337000 Grindstone River at Hiekley, MN - 1940-47 05337500 Snake River at Mora, MN 422 1909-13 05338000 Snake River at Sanatorium Bridge near Pine City, MN - 1937-38 *05338500 Snake River near Pine City, MN 958 1913-17, 1951-81 05339500 St. Croix River near Rush City, MN a5,120 1923-61 05340000 Sunrise River near Stacy, MN 167 1949-65

Lower Mississippi River basin 05345500 Vermillion River at Empire (Empire City), MN 124 1942-44 05346000 Vermillion River at Hastings, MN 195 1942-47 *05355200 Cannon River at Welch, MN al,320 1909-14, 1930-71 05371500 Mississippi River at Wabasha, MN a56,600 1934 *05372800 South Fork Zumbro River on Belt Line at Rochester, MN 155 1981 *05372930 Bear Creek at Rochester, MN 80.0 1981 *05372950 Silver Creek at Rochester, MN 17.3 1981 *05372990 Cascade Creek at Rochester, MN 35.8 1981 05373000 South Pork Zumbro River near Rochester, MN 304 1952-81 05373500 Zumbro River (South Branch) near Zumbro Palls, MN 821 1911-17 05374000 Zumbro River at Zumbro Palls, MN - 1909-17, 1929-80 05374500 Zumbro River at Theilman, MN al,320 1938-56 *05376500 South Pork Whitewater River near Altura, MN 76.8 1939-71 05377000 Beaver Creek at Beaver, MN 15.4 1939-40 05377500 . Whitewater River at Beaver, MN 288 1936-38 1939-56 05379000 Gilmore Creek at Winona, MN 8.95 1939-63 05380500 Mississippi River at Lamoile, MN a60,000 1930-31 05383500 Mississippi River at LaCrosse, WI - 1929-55 05383600 North Branch Root River tributary near Stewartville, MN 0.73 1959-64 "See footnotes at end of table. 1 Station Drainage Period of number Station name area (mi ) record Lower Mississippi River basin--Continued *05384500 Rush Creek near Rashford, "IN 129 19^2-79 05386000 Root River below South Pork: near Houston, MM al,560 1938-61 05M56500 Turtle Creek near Austin, MN l^lf 19^7-51 05475000 Heron Lake outlet near Heron Lake, MM - 1930-43 Big Sioux River basin *06483000 Rock River at Luverne, MN 440 1911-lU 06603000 Little Sioux River near Lakefield, "IN ' 17.1 1948-63 06603500 Jackson County ditch No. 11 near Lakefield, MN 7.69 1948-61 * Presently operated as a high-flow partial-record station, t Sta^e records only, a Approximately. 29 UPPER MISSISSIPPI RIVER BASIN MISSISSIPPI RIVER MAIN STEM 05201000 WINNIBIGOSHISH LAKE NEAR DEER RIVER, MM LOCATION.—Lat 47°25'42", long 94°03'00", in sec.25, T.146 N., R.27 W., Itasca County, Hydrologic Unit 07010101, on Leech Lake Indian Reservation, at dam on Mississippi River, 1 mi (1.6 km) northwest of Little Winnlbigoshish Lake, 14 mi (23 km) northwest of town of Deer River, and at mile 1,248 (2,008 km) upstrean from Ohio River.

DRAINAGE AREA.—1,442 mi 2 (3,735 km 2 ). PERIOD OP RECORD.—April 1884 to current year. Prior to October 1941 monthend contents only, published in WSP 1308. Published as Winnibigoshish Reservoir near Deer River October 1941 to September 1956.

REVISED RECORDS.—WSP 1308: 1905(M). GAGE.—Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to July 8, 1949, nonrecording gage at same site, and July 9, 1949, to July 10, 1973, water-stage recorder at same site and at latum of 1,288.94 ft (392.869 m) National Geodetic Vertical Datum of 1929. REMARKS .—Reservoir is formed by Winnibigoshish Lake and several other natural lakes controlled by a concrete and timber dam, completed in 1884; storage began in 1334. Capacity between elevations 1,294.94 ft (394.700 m) and 1,303.14 ft (397.200 m) (maximum allowable range) is 668,737 acre-ft (825 hra3 ) of which 439,636 acre-ft (542 hm3 ) is controlled storage between elevations 1,29'J.94 ft (394.700 m) and 1,300.94 ft (396.530 m) (normal operating range). Contents shown herein are contents above elevation 1,286.00 ft (391-973 m). Prior to September 1978, published contents as contents above elevation 1,288.94 ft (392.869 m). Water is used to bene­ fit navigation on Mississippi River below Minneapolis. COOPERATION.--Records furnished by Corps of Engineers. EXTREMES FOR PERIOD OP RECORD.—Maximum contents observed, 996,500 acre-ft (1,230 hm 3 ) capacity table then in use, July 30, 1905, elevation, 1,303-39 ft (397-273 m); minimum observed, 33,680 acre-ft (41-5 hm 3 ) below zero of capacity table then in use, Oct. 20, 1931, elevation, 1,288.25 ft (392.659 m). EXTREMES FOR CURRENT YEAR.--Maximum contents, 711,100 acre-ft (877 hm 3 ) May 31, elevitlon, 1,299-10 ft (395-966 m); minimum, 564,400 acre-ft (696 hm 3 ) Mar. 7, elevation, 1,296.89 ft (395.292 m). MONTHEND ELEVATION AND CONTENTS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 Elevation Contents Change in contents Date (feet) (acre-feet) (acre-feet) Sept. 30 1298.24 651760 Oct. 31 1298.53 670640 +18880 Nov. 30 1298.15 645740 -24900 Dec. 31 1297-80 622620 -23120 CAL YR 1981 -27850 Jan. 31 1297-34 592850 -29770 Feb. 28 1296.94 567530 -25320 Mar. 31 1297-04 573810 +6280 Apr. 30 1297 .97 633800 +59990 May 31 1299 .10 703800 +70000 June 30 1298.34 658470 -45330 July 31 1298.40 662520 + 4050 Aug. 31 1298.21 649750 -12770 Sept. 30 1298.21 649750 0 WTR YR 1982 -2010 30 MISSISSIPPI RIVER MAIN STEM 05201500 MISSISSIPPI RIVER AT WINNIBIGOSHISH DAM NEAR DEER RIVER, MN LOCATION.—Lat 47°25'42", long 94°03'00", In SWi sec.25, T.146 N., R.27 W., Itasca County, Hydrologic Unit 07010101, on Leech Lake Indian Reservation, at dam 1 mi (1.6 km) northwest of Little Winnibigoshish Lake, 14 mi (23 km) northwest of town of Deer River, and at mile 1,248 (2,008 km) upstream from Ohio River.

DRAINAGE AREA. —1,442 mi 2 (3,735 km 2 ). PERIOD OP RECORD.—May 1884 to current year. Monthly discharge only for some periods, published in WS D 1308. GAGE.—Water-stage recorder on headwater and nonrecording gage on tailwater. Datum of gage is National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to June 30, 1973, gages at same sites with datura at 1,289.47 ft (393.030 m) adjustment of 1912. Prior to July 8, 1949, nonrecording headwater gage at same site and datum in use. REMARKS.—Daily discharge is computed on the basis of modified weir formula and corrected to conform with discharge measurements, the head being determined from readings of headwater and tailwater gages. Plow completely regulated by Winnibigoshish Lake (station 05201000). COOPERATION.--Daily discharge computed by Corps of Engineers. AVERAGE OISCHARGE (unadjusted).—98 years, 515 ft 3 /s (14.58 m 3 /s), 4.85 in/yr (123 mm/yr). EXTREMES POR PERIOD OP RECORD.—Maximum daily discharge, 4,370 ft 3 /s (124 m3 /s) Aug. 6, 1905; no flow at times in several years. EXTREMES FOR CURRENT YEAR.—Maximum daily discharge, 1,440 ft 3 /s (40.8 m3 /s) June 22-24; minimum daily, 89 ftVs (2.52 m3 /s) Apr. 3-

DISCHARGE, IN CUBIC PEST PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT MOV DEC JAN PEB MAR APR MAY JJN JUL SEP 1 453 1000 999 992 984 773 197 101 990 778 596 304 2 454 1000 999 992 934 723 143 101 990 781 596 305 3 453 1000 999 992 984 674 89 101 988 591 497 305 4 453 1000 999 992 984 634 99 101 988 593 400 305 5 454 1000 999 992 984 587 98 101 988 593 400 305 6 505 1000 997 991 984 539 99 101 988 594 402 305 7 549 1000 997 991 984 539 99 101 988 595 402 305 8 601 1000 994 991 984 540 100 101 988 599 402 305 9 649 1000 997 991 984 540 100 101 988 596 403 305 10 649 1000 997 989 984 540 100 101 988 597 402 304 11 649 1000 997 989 982 540 100 101 988 597 402 304 12 649 1000 999 987 982 540 100 101 986 597 402 304 13 648 1000 999 986 982 540 100 102 986 597 402 304 14 649 999 999 986 980 540 100 102 986 597 303 304 15 649 1000 999 986 980 540 100 102 985 597 303 304 16 649 1000 997 986 980 540 100 202 985 597 303 , 304 17 649 1000 995 986 980 540 100 307 1220 597 303 304 18 652 1000 994 986 980 540 100 609 1220 597 304 304 19 651 999 994 986 980 540 101 901 1210 597 304 304 20 650 1000 994 986 980 540 101 899 1210 596 304 304

21 650 999 994 986 980 540 101 896 1210 596 304 304 22 750 999 994 986 980 540 101 896 1440 596 304 304 23 843 999 994 986 980 540 101 896 1440 596 304 304 24 890 999 994 986 912 492 101 894 144,0 500 304 304 25 936 999 994 986 866 445 101 990 143'0 500 304 304 26 1000 997 992 986 821 396 101 990 1430 500 304 304 27 1000 999 992 986 773 347 101 988 1430 500 304 304 28 1000 999 992 986 773 347 101 988 1430 500 304 304 29 1000 999 992 986 —— 348 101 988 1080 500 304 304 30 1000 999 992 986 —— 299 101 988 774 501 304 304 31 1000 —— 992 986 —— 244 —— 990 —— 597 304 —— TOTAL 21784 29986 30866 30623 26731 16032 3141 14940 33764 18172 11174 9128 MEAN 703 1000 996 988 955 517 105 482 1125 586 360 304 MAX 1000 1000 999 992 984 773 197 990 1440 781 596 305 MIN 453 997 992 986 773 244 89 101 774 500 303 304 CPSM .49 .69 .69 .69 .66 .36 .07 .33 .78 .41 .25 .21 IN. .56 .77 .80 .79 .69 .41 .08 • 39 .87 .47 .29 .24 CAL YR 1981 TOTAL 173234 MEAN 475 MAX 1340 MIN 100 CPSM .33 IN 4.47 WTR YR 1982 TOTAL 246341 MEAN 675 MAX 1440 MIN 89 CPSM .47 IN 6.35 LEECH LAKE RIVER BASIN 165721091102601 WILLIAMS LAKE NEAR AKELEY, MN LOCATION.—Lat 16°57'24", long 91°10'26", in SEJNWi sec.12, T.110 N., R.32 W., Hubbard County, Hydrologic Unit 07010102. Samples are collected near center of lake at the deepest point. DRAINAGE AREA. —0.875 mi 2 (21.27 km 2 ). PERIOD OP RECORD.--Water years 1977 to current year. REMARKS.—There are various meteorologic instruments at the station, and data from these instruments are available in the District office.

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPE­ HARD­ CIFIC NESS MAGNE­ CON­ PH HARD­ NONCAR- CALCIUM SIUM, SODIUM, SAM­ DUCT­ LAB NESS BONATE DIS­ DIS­ DIS­ PLING ANCE (STAND­ (MG/L (MG/L SOLVED SOLVED SOLVED TIME DEPTH LAB ARD AS AS (MG/L (MG/L (MG/L DATE ( PEET ) (UMHOS) UNITS) CAC03) CAC03) AS CA) AS MG) AS NA) (00003) (90095) (00103) (00900) (95902) (00915) (00925) (00930) OCT 11.. 1100 3.30 160 7.9 77 .00 20 6.5 1.2 11... 1130 26.9 160 7.7 77 .00 20 6.5 1.3 27.. 1100 3.30 161 8.0 81 .00 22 7.0 1.3 27... 1125 26.5 162 8.1 83 .00 22 6.9 1.2 JAN 05... 1135 3.30 171 7.8 92 .00 21 7.8 1.5 05... 1220 27.2 187 7.7 87 .00 23 7.3 1.9 PEB 21.. 1235 3.30 186 7.6 95 .00 25 8.0 1.3 21.., 1315 25.2 191 7.5 97 .00 26 7.7 1.3 APR 06.., 1115 3.30 195 7.7 101 2.0 27 8.2 1.7 06... 1215 26.9 198 7.5 105 5.0 28 8.5 2.9 MAY 05... 1110 3.30 177 7.6 95 .00 26 7.3 1.2 05... 1115 27.9 161 8.0 88 .00 21 6.7 1.2 26.., 1105 — 170 8.0 90 .00 25 6.8 1.3 26... 1115 27.9 193 7.5 99 1.0 27 7.7 1.1 JUN 23... 1010 3.30 161 8.2 81 .00 22 7.1 1.1 23... 1120 26.7 183 7.8 92 .00 25 7.2 1.2 JUL 07... 1000 3.30 156 8.3 85 .00 22 7.1 1.1 07... 1055 26.7 191 7.6 97 .00 26 7.8 1.5 21.., 0835 3.30 119 8.3 77 .00 20 6.6 1.2 21.., 0925 26.7 193 7.1 95 .00 26 7.2 1.3 AUG 01.., 1020 3.30 118 8.5 76 .00 19 6.9 1.2 01... 1105 26.7 185 7.7 89 .00 21 7.0 1.3 12... 1015 3.30 153 8.7 78 .00 20 6.9 1.3 12.., 1110 26.7 187 7.7 93 .00 25 7.1 1.1 27... 0915 3.30 119 8.1 71 .00 18 7.0 1.1 30... 1015 26.7 172 7.1 82 .00 21 7.2 1.1 SEP 13... 1005 3.30 160 8.0 79 .00 20 7.0 1.2 13... 1055 26.7 167 7.7 81 .00 21 7.0 1.2 25... 1015 3.30 169 8.2 81 .00 22 7.1 1.3 25.., 1100 26.7 169 8.2 81 9.0 22 7.1 1.3 32 LEECH LAKE RIVER BASIM 465724094402601 WILLIAMS LAKE NEAR AKELEY, MN—Continued WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SOLIDS, SOLIDS, POTAS- ALKA- CHLO- SILICA, RESIDUE SUM OP MANGA- SIUM, LIMITY SULPATE RIDE, DIS- AT 180 CONSTI- IRON, NESE, DIS- LAB DIS- DIS- SOLVED DEG . C TUENTS, DIS- DIS­ SOLVED (MG/L SOLVED SOLVED (MO/L DIS- DIS- i SOLVED SOLVED (MG/L AS (MG/L (MG/L AS SOLVED SOLVED (UG/L (UG/L DATE AS K) CAC03) AS S04) AS CL) SI02) (MG/L) (MG/L) ' AS PE) AS MN) (00935) (90410) (00945) (00940) (00955) (70300) (70301), (01046) (01056) 1 OCT 14... 1 .1 83 <.l .6 1.2 98 81 23 2 14... 1 .1 85 < .1 .6 1.2 93 82 25 1 27... .9 85 <1. 0 .8 .8 103 84 110 2 27... 4 .3 88 .0 .6 .7 101 88 30 2 JAN 05... 1 .1 93 1.5 .9 .3 120 93 27 2 05... 1 .0 98 1.4 .7 1.0 114 95 84 67 FEB 24... 1 .2 99 .4 .5 .5 119 96 13 <1 24... 1 .2 98 .4 .7 1.0 117 97 30 9 APR 06... 1 .1 99 5.0 1.0 .8 105 104 8 1 06... 1 .1 100 5.0 .6 1.5 110 108 40 14 MAY 05... 1 .2 99 <1.0 .6 1.0 73 — <3 7 05... 1 .1 92 <1 .0 .5 .5 84 — <3 2 26... 1 .0 92 <1 .0 .5 .2 117 _ 14 2 26... 1 .1 98 <1.0 .5 .2 120 — 7 14 JUN 23... 1 .0 90 <1.0 .5 .3 96 — <3 3 23... 1 .1 98 <1 .0 .6 .1 106 — 18 46 JUL 07... .7 85 <1.0 .4 .6 90 — 22 1 07... .8 98 1.0 .5 .5 108 97 58 80 21... .6 82 2.0 1.1 .8 97 81 3 14 21... .8 100 1.0 .5 .5 97 97 60 140 AUG 04... .9 80 <1.0 .5 1.0 89 __ <3 <1 04... .9 97 <1 .0 1.1 .6 115 — 15 12 12. .. .7 80 <1 .0 .9 1.0 83 — 5 <1 12... .9 96 <1.0 .9 .7 119 — 9 3 27... .9 80 <1.0 .4 1.2 88 — <3 1 30... .9 91 <1 .0 .8 1.1 101 — <3 8 SEP 13... .9 83 2.0 .8 1.0 100 83 9 <1 13... 1 .0 86 <1 .0 .9 1.2 88 33 2 25... 1 .1 86 4.0 .7 1.1 102 89 10 2 25... 1 .0 75 2.0 .8 1.0 102 80 10

NITRO­ CHLOR-A CHLOR-B TRANS­ NITRO­ GEN, AM­ PHYTO- PHYTO- PAR­ GEN, MONIA + PLANK- PLANK- ENCY N02+N03 ORGANIC TON TON (SECCHI TOTAL TOTAL CHROMO CHROMO TIME DISK) (MG/L (MG/L PLUG ROM PLUOROM DATE (M) AS N) AS N) (UG/L) (UG/L) (00078) (00630) (00625) (70953) (70954) OCT 14.. . 1300 3.4 .01 .59 9.27 <.100 27.. . 1510 3.2 .03 .78 8.78 ^ .100 JAN 05.. . 1400 6.0 .05 .89 1.41 <.100 PEB 24.. . 1330 5.5 .11 .65 .720 <.100 APR 06.. . 1300 3.6 .17 .47 2.32 <.100 MAY 05.. . 1500 3.5 <.10 .91 8.90 <.100 26.. . 1250 7.2 .30 .50 5.90 <.100 JUN 10.. . 1445 5.0 — — 7.20 <.100 23.. . 1300 4.5 < .10 .80 2.40 <.100 JUL 07.. . 1210 4.8 <.10 .40 3.30 <.100 21.. . 0940 4.5 < .10 .50 5.40 <. .100 AUG 04.. . 1115 4.9 <.10 .40 3.80 <.100 12.. . 1120 4.8 < .10 .50 2.20 <.100 27.. . 1050 4.8 <.10 .80 — — 28.. . 1050 4.8 — — 1.60 (.100 SEP 13.. . 1100 4.5 — — 7.80 .400 25.. . 1115 4.0 < .10 .40 3.30 <.100 33 LEECH LIKE RIVER BASIN 465724094402601 WILLIAMS LAKE NEAR AKELEY, MN—Continued WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPE­ CIFIC PHOS­ SAM­ CON­ PH OXYGEN, PHORUS , PLING DUCT­ (STAND­ TEMPER­ DIS­ TOTAL TIME DEPTH ANCE ARD ATURE SOLVED (MG/L DATE (PEET) (OMHOS) UNITS) (DEG C) (MG/L) AS P) (00003) (00095) (00400) (00010) (00300) (00665) OCT 14... 1055 .00 170 7.0 11.2 9.9 .014 14... 1100 3.30 171 7.1 11.2 9.8 — 14... 1105 6.60 171 7.1 11.2 9.7 .011 14... 1110 13.1 172 7.1 11.2 9.6 .012 14... 1115 19.7 171 7.1 11.2 9.6 .015 14... 1120 26.2 171 7.1 11.2 9.6 .011 14... 1130 26.9 171 7.1 11.2 9.6 — 14... 1300 _*. — — — — .015 14... 1500 — 55 4.2 — — .001 27... 1353 .00 166 7.7 6.3 11.1 .008 27... 1400 3.30 166 7.7 6.2 11.1 — 27... 1405 6.60 166 7.7 6.2 11.1 .007 27... 1410 13.1 166 7.8 6.1 11.1 .017 27... 1417 19.7 166 7.8 6.1 11.1 .008 27... 1421 26.2 166 7.8 6.1 11.1 .015 27... 1425 26.5 166 7.8 6.1 11.1 — 27... 1510 — — — — .016 27... 1545 — — — — — <.001 JAN 05... 1130 .00 203 6.3 1.0 13.1 .028 05... 1135 3.30 203 6.8 2.3 11.8 — 05... 1140 6.60 203 6.9 4.0 10.5 .021 05... 1150 13.1 206 7.0 4.4 8.7 .016 05... 1200 19.7 208 7.1 4.5 7.4 .013 05... 1210 26.2 215 7.1 4.7 6.2 .016 05... 1220 27.2 218 7.1 4.7 6.0 — 05... 1400 — — — — — .020 FEB 24... 1230 .00 178 6.5 .7 10.1 .222 24... 1235 3.30 178 6.6 1.8 9.5 — 24... 1240 6.60 174 6.6 3.8 8.1 .150 24... 1250 13.1 179 6.7 4.2 6.7 .048 24... 1300 19.7 182 6.7 4.4 5.7 .059 24... 1315 25.2 185 6.7 4.5 5.0 — 24... 1320 26.2 185 6.7 4.5 5.0 .260 24... 1330 — — — — — .014 APR 06... 1110 .00 160 7.5 .5 10.7 .018 06... 1115 3.30 123 7.6 1.6 7.7 — 06... 1125 6.60 122 7.3 4.2 4.0 .016 06... 1135 13.1 122 7.2 4.4 3.3 .010 06... 1145 19.7 124 7.2 4.5 2.8 .013 06... 1155 26.2 125 7.1 4.5 2.7 .018 06... 1215 26.9 125 7-1 4.5 2.7 — 06... 1300 — — — — — .023 MAY 05... 1100 .00 173 7.6 12.7 10.0 .011 05... 1110 3.30 172 7.7 12.7 9.7 — 05... 1115 6.60 172 7.7 12.6 9.6 .014 05... 1120 13.1 174 7.5 11.1 9.4 .020 05... 1125 19-7 177 7.3 8.2 8.2 .023 05... 1130 26.2 183 7.0 6.8 4.9 .016 05... 1145 27.9 183 7.0 6.8 4.9 — 05... 1500 — — — — — .013 26... 0110 — 50 6.5 — — .003 26... 1100 .00 172 8.0 17.8 10.3 .005 26... 1105 — 172 8.0 17.8 10.2 — 26... 1115 6.60 171 8.0 17.4 10.2 .004 26... 1120 13.1 171 8.0 16.1 10.3 .007 26... 1125 19.7 175 8.0 12.0 11.4 .006 26... 1135 26.2 185 7.1 8.1 4.4 .033 26... 1145 27.9 185 6.9 7.5 2.6 — 26... 1250 — — — — .012 JUN 10... 1140 .00 172 8.0 16.2 8.8 .018 10... 1445 — — — — — .013 23... 1030 .00 168 8.2 19.4 9.5 <.001 23... 1040 3.30 168 8.2 19.4 9.4 — 23... 1045 6.60 168 8.2 19-3 9.4 <.001 23... 1055 13.1 169 8.2 18.8 9.4 <.001 23... 1105 19.7 174 8.0 16.4 9.1 <.001 23... 1115 26.2 187 7.2 9.7 2.7 <.001 23... 1120 26.7 187 7.2 9.7 2.4 — 23... 1300 — <50 6.2 — — <.001 JOL 07... 0950 .00 161 8.0 23.5 9.5 .010 07... 1000 3.30 161 8.0 23.6 9.4 — 07... 1015 6.60 161 8.0 23.6 9.4 .008 LEECH LAKE RIVER BASIN 465724094402601 WILLIAMS LAKE NEAR AKELEY, MN—Continued WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPE­ CIFIC PHOS­ SAM­ CON­ PH OXYGEN, PHORUS , PLING DUCT­ ( STAND­ TEMPER­ DIS­ TOTAL TIME DEPTH ANCE ARD ATURE SOLVED (MG/L DATE (FEET) (UMHOS) UNITS) (DEG C) (MG/L) AS P) (00003) (00095) (00400) (00010) (00300) (00665) JOL--Contlnued 07... 1025 13.1 162 8.0 23.3 9.8 .014 07... 1035 19.7 172 7.9 18.3 10.8 .016 07... 1045 26.2 188 6.8 11.2 2.6 .018 07... 1055 26.7 188 6.8 11.2 2.6 — 07... 1210 — __ — — __ .011 07... 1225 — <50 5.9 — __ .008 21... 0830 .00 152 8.9 24.2 9.6 .004 21... 0835 3.30 15't 8.9 24.1 9.1 __ 21. .. 0845 6.60 154 9.0 23.2 9.2 .010 21... 0855 13.1 155 8.9 22.7 9.0 .004 21... 0905 19.7 172 8.8 19.6 9.6 .006 21... 0915 26.2 188 7.5 12.5 2.1 .016 21... 0925 26.7 188 7.5 12.5 2.1 — 21... 0940 — __ — __ __ .008 21... 1200 — <50 6.7 — — .003 AUG 04... 1015 .00 152 8.9 25.0 9-1 .006 04... 1020 3.30 156 8.9 24.8 8.9 — 04... 1030 6.60 157 8.9 24.8 8.2 .004 04... 1040 13.1 162 8.9 24.0 7.8 .004 04... 1050 19.7 179 8.6 22.0 7-7 .007 04... 1100 26.2 210 7.7 12.9 1.7 .012 04... 1105 26.7 210 7.7 12.9 1.7 — 04... 1115 — — — — .007 12... 1000 .00 147 9.2 22.3 9-0 .012 12... 1015 3.30 147 9.2 22.5 8.7 — 12... 1025 6.60 145 9.2 22.6 8.7 .007 12... 1035 13.1 150 9.2 22.8 8.6 .005 12... 1045 19.7 160 9.1 20.0 7.3 .008 12... 1055 26.2 180 7.9 12.7 .6 .012 12. .. 1110 26.7 180 7.9 12.7 .6 — 12... 1120 — — — — — .110 12. .. 1230 — <50 7.6 — — .026 27... 0940 .00 250 8.8 21.4 9.6 .013 27... 0945 3.30 250 9.0 21.3 9-5 — 27... 1000 6.60 250 8.8 21.3 8.6 .010 27... 1010 13.1 250 8.8 21.2 5.4 .006 27... 1020 19.7 255 8.8 21.0 4.0 .009 27... 1030 26.2 290 7.6 13.3 1.8 .012 27... 1050 — — — — — .012 27... 1200 — <50 6.4 — — .006 30... 1045 26.7 290 7.6 13.3 1.8 — SEP 13... 1005 3.30 _ __ _ 8.2 _ 13... 1055 26.7 — — — .6 — 25... 1000 .00 160 8.0 14.6 9.2 .008 25... 1015 3.30 162 8.1 14.6 9.2 __ 25... 1020 6.60 160 8.1 14.6 7.5 .007 25... 1030 13.1 164 8.2 14.5 6.0 .009 25... 1040 19.7 162 8.2 14.4 5.0 .008 25... 1050 26.2 164 8.2 14.4 4.5 .010 .25... 1100 26.7 164 8.2 14.4 4.5 — 25... 1115 — — — — __ .008 25... 1215 — <50 6.1 — — .006 35 LEECH LAKE RIVER BASIN 465724094402601 WILLIAMS LAKE NEAR AKELEY, MN—Continued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1982 DATE OCT 14,81 OCT 27,81 JAN 5,82 PEB 24,82 APR 6,82 TIME 1300 1510 1400 1330 1300

TOTAL CELLS/ML 9900 42000 1300 0 43 DIVERSITY: DIVISION 0.5 0.0 0.0 0.9 .CLASS 0.5 0.0 0.0 0.9 ..ORDER 0.7 0.9 0.0 0.9 ...FAMILY 0.7 0.9 0.0 0.9 . .. .GENUS 0.2 1.1 1.3 0.0 0.9

CELLS PER- CELLS PER- CELLS PER- CELLS PER- CELLS PER- ORGANISM /ML CENT /ML CENT /ML CENT /ML CENT /ML CENT BACILLARIOPHYTA (DIATOMS) .BACILLARIOPHYCEAE ..ACHNANTHALES . . .ACHNANTHACEAE ....ACHNANTHES — -- -- ..BACILLARIALES ...NITZSCHIACEAE ....NITZSCHIA ..EUPODISCALES ...COSCINODISCACEAE . .. .CYCLOTELLA — - — - — ....MELOSIRA 82 1 — — ..PRAGILARIALES ...PRAGILARIACEAE ....ASTERIONELLA -- - 3200 8 33 ....PRAGILARIA — - 350 1 — ....SYNEDRA — -- -- ..NAVICULALES ...NAVICULACEAE . ...NAVICULA * 0 — -- CHLOROPHYTA (GREEN ALGAE) .CHLOROPHYCEAE ..CHLOROCOCCALES . ..CHLOROCOCCACEAE ....SCHROEDERIA ------29 # 67 ...COCCOMYXACEAE ....ELAKATOTHRIX — __ _ _- ...MICRACTINIACEAE ....MICRACTINIUM ...OOCYSTACEAE . .. .ANKISTRODESMUS ....CHODATELLA — __ _ __ . ...CLOSTERIOP3IS ....OOCYSTIS 110 1 * 0 — . ...QUADRIGULA ....SELENASTRUM — __ _ __ ....TROCHISCIA — -- -- .. .PALMELLACEAE ....SPHAEROCYSTIS ------...SCENEDESMACEAS ....GLOEOACTINIUM — — -- ....SCENEDESMUS — -- — ..TETRASPORALES .. .GLOEOCYSTACEAE ....GLOEOCYSTIS — — _ — . .VOLVOCALES . . .CHLAMYDOMONADACEAE ....CARTERIA — _ ....CHLAMYDOMONAS — — — ..ZYGNEMATALES ...DESMIDIACEAE ....STAURASTRUM * 0 CHRYSOPHYTA .CHRYSOPHYCEAE ..OCHROMONADALES ...DINOBRYACEAE ....DINOBRYON __ _ __ — ...OCHROMONADACEAE ....OCHROMONAS __ _ * 0 -- ...SYNURACEAE ....MALLOMONAS — * 0 -- .XANTHOPHYCEAE ..MISCHOCOCCALES ...SCIADACEAE . ...OPHIOCYTIUM NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 1555 * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/255 36 LEECH LAKE RIVER BASIN 465724094402601 WILLIAMS LAKE NEAR AKELEY, MN—Continued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1982—Continued DATE OCT 14,81 OCT 27,81 JAN 5,82 PEB 24,82 APR 6,82 TIME 1300 1510 1400 1330 1300 CELLS PER- CELLS PER- CELLS PER- CELLS PER- CELLS PER- ORGANISM /ML CENT /ML CENT /ML CENT /ML CENT /ML CENT CRYPTOPHYTA (CRYPTOMONADS) .CRYPTOPHYCEAE ..CRYPTOMONADALES ...CRYPTOMONADACEAE . ...CRYPTOMONAS — — — — — CYANOPHYTA (BLUE-GREEN ALGAE) .CYANOPHYCSAE ..CHROOCOCCALES . ..CHROOCOCCACEAE . ...AGMENELLUM — — 110 9 — — ....ANACYSTIS 97000 98 340000 8l — -- — ....GOMPHOSPHAERIA — - 2500 6 7700 6l — — ..NOSTOCALES ...NOSTOCAGEAE . ...ANABAENA — - 670 2 — — -- ....APHANIZOMENON — - 920 2 — — — . .OSCILLATORIALES ...OSCILLATORIACEAE . ...OSCILLATORIA — - — 390# 30 — - — EUGLENOPHYTA (EUGLENOIDS) .EUGLENOPHYCEAE ..EUGLENALES ...EUGLENACEAE . ...TRACHELOMONAS — — — — — PYRRHOPHYTA (PIRE ALGAE) .DINOPHYCEAE ..DINOKONTAE ...CERATIACEAE ....CERATIUM — -- — — -- .. .GLENODINIACEAE ....GLENODINIUM — — — — — .. .PERIDINIACEAE ....PERIDINIUM — - * 0 — — NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 1555 * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/255 37 LEECH LAKE RIVER BASIN 465724094402601 WILLIAMS LAKE NEAR AKELEY, MN—Continued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1982 DATE MAY 5,82 MAY 26,82 JUN 23,82 JUL 7,82 JUL 21,82 TIME 1500 1250 1300 1210 0940 TOTAL CELLS/ML 7400 7400 6800 4400 7700 DIVERSITY: DIVISION 1.5 1.0 1.5 0.3 .CLASS 1.5 1.0 1.5 0.3 ..ORDER 1.6 1.1 1.7 1.0 0.9 ...FAMILY 1.6 1.7 1.7 1.1 0.9 ....GENUS 1.7 2.1 1.8 1.9 1.7

CELLS PER- CELLS PER- CELLS PER- CELLS PER- CELLS PER- ORGANISM /ML CENT /ML CENT /ML CENT /ML CENT /ML CENT BACILLARIOPHYTA (DIATOMS) .BACILLARIOPHYCEAE ..ACHNANTHALES ...ACHNANTHACEAE ....ACHNANTHES * 0 ..BACILLARIALES ...NITZSCHIACEAE . . ..NITZSCHIA 79 1 ..EUPODISCALES . . .COSCINODISCACEAE . ...CYCLOTELLA 180 72 . ...MELOSIRA ..FRAGILARIALES ...PRAGILARIACEAE ....ASTERIONELLA 230 3 ....PRAGILARIA 79 1 1000 14 ....SYNEDRA 280 4 750 10 ..NAVICULALES ...NAVICULACEAE . ...NAVICULA CHLOROPHYTA (GREEN ALGAE) .CHLOROPHYCEAE CHLOROCOCCALES .CHLOROCOCCACEAE ..SCHROEDERIA 72 2 43 1 .COCCOMYXACEAE ..ELAKATOTHRIX 58 1 .MICRACTINIACEAE ..MICRACTINIUM .OOCYSTACEAE ..ANKISTRODESMUS 79 1 47 1 310 4 ..CHODATELLA ..CLOSTERIOPSIS .OOCYSTIS 220 3 170 4 130 2 ..QUADRIGULA ..SELENASTRUM * 0 ..TROCHISCIA 59 1 .PALMELLACEAE ..SPHAEROCYSTIS .SCENEDESMACEAE ..GLOEOACTINIUM ..SCENEDESMUS 120 1 TETRASPORALES .GLOEOCYSTACEAE ..GLOEOCYSTIS VOLVOCALES .CHLAMYDOMONADACEAE ..CARTERIA * 0 ..CHLAMYDOMONAS 59 1 47 1 44 1 ZYGNEMATALES .DESMIDIACEAE ..STAURASTRUM CHRYSOPHYTA .CHRYSOPHYCEAE ..OCHROMONADALES ...DINOBRYACEAE ....DINOBRYON 790 11 .. .OCHROMONADACEAE ....OCHROMONAS 1200# 16 4100# 55 35000 51 ...SYNURACEAE ....MALLOMONAS * 0 330 4 .XANTHOPHYCEAE ..MISCHOCOCCALES . ..SCIADACEAE ....OPHIOCYTIUM 72 1 NOTE: # DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 15% OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/2% 38 LEECH LAKE RIVER BASIN 465724094402601 WILLIAMS LAKE NEAR AKELEY, MN--Contlnued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1982—Continued DATE MAY 5,82 MAY 26,82 JUN 23,82 JUL 7,82 JUL 21,82 TIME 1500 1250 1300 1210 0940 CELLS PER- CELLS PER- CELLS PER- CELLS PER- CELLS PER- ORGANISM /ML CENT /ML CENT /ML CENT | /ML CENT /ML CENT CRYPTOPHYTA (CRYPTOMONADS) .CRYPTOPHYCEAE ..CRYPTOMONADALES ...CRYPTOMONADACEAE ....CRYPTOMONAS 140 2 — — * 0 — CYANOPHYTA (BLUE-GREEN ALGAE) .CYANOPHYCEAE ..CHROOCOCCALES . ..CHROOCOCCACEAE . ...AGMENELLUM — — — — — ....ANACYSTIS 5100# 69 47 1 350 5 1400# 31 1900# 25 . ...GOMPHOSPHAERIA — - — - — - 2200# 51 4400# 57 ..NOSTOCALES . . .NOSTOCACEAE ....ANABAENA — — - 2300# 33 360 8 1000 13 ....APHANIZOMENON -- — — — — ..OSCILLATORIALES ...OSCILLATORIACEAE ....OSCILLATORIA — — — — — EUGLENOPHYTA (EUGLENOIDS) .EUGLENOPHYCEAE ..EUGLENALES ...EUGLENACEAE ....TRACHELOMONAS 140 2 47 1 — -- -- PYRRHOPHYTA (PIRE ALGAE) .DINOPHYCEAE . .DINOKONTAE ...CERATIACEAE ....CERATIUM — — — 29 1 -- .. .GLENODINIACEAE . ...GLENODINIUM 79 1 .. .PERIDINIACEAE ....PERIDINIUM * 0

NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 15% * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/2% 39 LEECH LAKE RIVER BASIN 465724094402601 WILLIAMS LAKE NEAR AKELEY, MN--Continued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1982 DATE AUG 4,82 AUO 12,82 AUG 28,82 SEP 25,82 TIME 1115 1120 1050 1115

TOTAL CELLS/ML 130000 11000 990 6200 DIVERSITY: DIVISION 0.1 0.2 1.2 1.3 .CLASS 0.1 0.2 1.2 1.3 ..ORDER 0.1 0.2 1.2 2.6 ...FAMILY 0.1 0.2 1.2 2.8 ....GENUS 0.4 1.0 1.3 3.0

CELLS PER- CELLS PER- CELLS PER- CELLS PER- ORGANISM /ML CENT /ML CENT /ML CENT /ML CENT BACILLARIOPHYTA (DIATOMS) .BACILLARIOPHYCEAE ..ACHNANTHALES . . .ACHNANTHACEAE .. ..ACHNANTHES — — -- — ..BACILLARIALES . ..NITZSCHIACEAE ....NITZSCHIA — — — - 69 1 ..EUPODISCALES . ..COSCINODISCACEAE . ...CYCLOTELLA — — 14 1 150 2 ....MELOSIRA — — 140 14 650 10 ..PRAGILARIALES ...PRAGILARIACEAE . ...4STERIONELLA — — — 670 11 ....FRAGILARIA — - 130 1 — — ....SYNEDRA — — — 210 3 ..NAVICULALES .. .NAVICULACEAE ....NAVICULA — — -- * 0

CHLOROPHYTA (GREEN ALGAE) .CHLOROPHYCEAE . .CHLOROCOCCALES ...CHLOROCOCCACEAE ....SCHROEDERIA * 0 * 0 — - 83 1 ...COCCOMYXACEAE ....ELAKATOTHRIX — * 0 — * 0 ...MICRACTINIACEAE . ...MICRACTINIUM — — — _ 69 1 . . .OOCYSTACEAE . ...ANKISTRODESMUS * 0 — -- 140 2 . .. .CHODATELLA — - — - — - * 0 . .. .CLOSTERIOPSIS — - — - — - * 0 ....OOCYSTIS * 0 — — — ....QUADRIGULA — - 120 1 -- -- . ...SELENASTRUM — — — — ....TROCHISCIA — — — — .. .PALMELLACEAE ....SPHAEROCYSTIS -- — — 55 1 ...SCENEDESMACEAE ....GLOEOACTINIUM — — 120 12 . ...SCENEDESMUS — -- — 55 1 . .TETRASPORALES . ..GLOEOCYSTACEAE ....GLOEOCYSTIS 1900 1 — ™ — - . .VOLVOCALES . . .CHLAMYDOMONADACEAE CARTERIA — — — •""• — — *~ ™" ~* ~" ™" !.'!.'CHLAMYDOMONAS * 0 — 14 1 120 2 ..ZYGNEMATALES ...DESMIDIACEAE ....STAURASTRUM -- * 0 — — CHRYSOPHYTA .CHRYSOPHYCEAE ..OCHROMONADALES ...DINOBRYACEAE . .. .DINOBRYON — - -- — — - ...OCHROMONADACEAE ....OCHROMONAS * 0 — — — ...SYNURACEAE ....MALLOMONAS — ~ — - 41 1 .XANTHOPHYCEAE . .MISCHOCOCCALES ...SCIADACEAE ....OPHIOCYTIUM — — -- — NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 1555 * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/2% 40 LEECH LAKE RIVER BASIN 465724094402601 WILLIAMS LAKE NEAR AKELEY, MN—Continued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1982—Continued DATE AUG 4,82 AUG 12,82 AUG 28,82 SEP 25,82 TIME 1115 1120 1050 1115 CELLS PER- CELLS PER- CELLS PER- CELLS PER- ORGANISM /ML CENT /ML CENT /ML CENT /ML CENT CRYPTOPHYTA (CRYPTOMONADS) .CRYPTOPHYCEAE ..CRYPTOMONADALES ...CRYPTOMONADAGEAE . ...CRYPTOMONAS CYANOPHYTA (BLUE-GREEN ALGAE) .CYANOPHYCEAE . .CHROOCOCCALES ...CHROOCOCCACEAE ....AGMENELLUM — — -- -- ....ANACYSTIS 120000# 95 79000 75 700# 71 700 11 ....GOMPHOSPHAERIA 4400 3 24000 23 — — - ..NOSTOCALES ...NOSTOCACEAE ....ANABAENA — -- -- 23001 37 ....APHANIZOMENON * 0 — — ~ . .OSCILLATORIALES ...OSCILLATORIACEAE . ...OSCILLATORIA — -- — 830 13 EUGLENOPHYTA (EUGLENOIDS) .EUGLENOPHYCEAE ..EUGLENALES ...EUGLENACEAE ....TRACHELOMONAS PYRRHOPHYTA (FIRE ALGAE) .DINOPHYCEAE ..DINOKONTAE ...CERATIACEAE ....CERATIUM — -- -- — ...GLENODINIACEAE ....GLENODINIUM — - — - — .. .PERIDINIACEAE ....PERIDINIUM — — -- — NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 15$ * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/255 ill LEECH LAKE RIVER BASIN 05206000 LEECH LAKE AT FEDERAL DAM, MN LOCATION.—Lat 47°12'23", long 94°l8'31", in lot 2, sec.14, T.143 N., R.29 W., Cass County, Hydrologic Unit 07010102, on Leech Lake Indian Reservation, at head of Leech Lake River on Waboose Bay, 5 mi (8 km) southwest of town of Federal Dan. DRAINAGE ARE ft. —1,163 mi 2 (3,012 km 2 ). PERIOD OP RECORD.—April 1884 to current year, Monthend contents only for some periods, published in WSP 1308. Prior to October 1956, published as "Leech Lake Reservoir." GAGE.—Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to Dec. 31, 1884, nonrecording gage 0.5 mi (0.8 km) north of outlet to Leech Lake River at datum 98.47 ft (30.014 n) higher. Dec. 31, 1884, to May 24, 1931, nonrecording gage 0.5 mi (0.8 m) north of outlet to Leech Lake River and May 25, 1931, to July 10, 1973, water-stage recorder at same site and at datum 92.70 ft (28.255 m) higher, REMARKS .—Reservoir is formed by Leech Lake and several other natural lakes controlled by concrete and timber 1an; storage began in 1884; original timber structure completed in 1884, replaced by present dam in 1902. Capacity between elevation 1,292.70 ft (394.015 m) and 1,297-94 ft (395.612 m) (maximum allowable range) is 688,985 acre-ft (850 hm3) of which 352,637 acre-ft (435 hm3) is controlled storage between elevations 1,292.70 ft (394.015 m) and 1,295,70 ft (394.929 m) (normal operating range). Contents shown herein are contents above elevation 1,290.00 ft (393.192 m). Prior to September 1978, published contents as contents above elevation 1,292.20 ft (393.863 m). Water is used to benefit navigation on Mississippi River below MinneaDolis,

COOPERATION.--Records furnished by Corps of Engineers. EXTREMES FOR PERIOD OF RECORD.—Maximum contents observed, 734,300 acre-ft (905 hm3) capacity table then in use, June 30, 1916, elevation, 1,297.88 ft (395.594 m); minimum, 51,380 acre-ft (63.4 hm 3 ) capacity table then in use, Dec. 8, 24, 1976, elevation, 1,292.69 ft (394.012 m). EXTREMES FOR CURRENT YEAR.—Maximum contents, 586,140 acre-ft (723 htn 3 ) May 18, elevation, 1,295.29 ft (394.804 m); minimum, 398,740 acre-ft (492 hm3) Mar. 12, elevation, 1,293.72 ft (394.326 m). MONTHEND ELEVATION AND CONTENTS, WATER YEAR OCTOBER 1981 to SEPTEMBER 1982 Elevation Contents Change in contents Date (feet) (acre-feet) (acre-feet) Sept. 30 ...... 1294.59 497980 Oct. 31 ...... 1294.65 505240 +7260 Nov. 30 ...... 1294.45 481280 -23960 Dec. 31 ...... 1294.18 449900 -31380 CAL YR 1981 ...... +77330 Jan. 31 ...... 1294.00 429610 -20290 Feb. 28 ...... 1293.80 407520 -22090 Mar. 31 ...... 1293.83 410820 +3300 Apr. 30 ...... 1294.70 511320 +100500 May 31 ...... 1295.20 574370 +63050 June 30 ...... 1294.88 533560 -40810 July 31 ...... 1295.12 564010 +30450 Aug. 31 ...... 1294.90 536060 -27950 Sept. 30 ...... 1294.80 523620 -12440 WTR YR 1982 ...... +25640 LEECH LAKE RIVER BASIN 05206500 LEECH LAKE RIVER AT FEDERAL DAM, MN LOCATION.—Lat 47°14'45", long 94°13'12" J in sec.29, T.144 N., R.28 W., Cass County, Hydrologic Unit 07010102, on Leech Lake Indian Reservation, on right bank at dam on Leech Lake River at town of Federal Dam, 2 mi (3 km) downstream from natural outlet of Leech Lake. DRAINAGE AREA. —1,163 mi 2 (3,012 km 2 ). PERIOD OF RECORD.—May 1884 to current year. Monthly discharge only for some periods, published in WSP 1308. GAGE.—Water-stage recorder, headwater gage, and nonrecording tailwater gage. Datum of gage is National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to June 30, 1973> gages (nonrecording headwater gage prior to July 3, 1948) at same sites with datum at 1,293.23 ft (394.176 m) adjustment of 1912. May 27 to Nov. 30, 1929, nonrecording gage at site 600 ft (183 m) downstream at different datum. REMARKS.--Discharge computed on basis of modified weir formula, the head being obtained from readings on tailwater gage and mean gage height from recording headwater gage. Plow completely regulated by Leech Lake (station 05206000). COOPERATION.—Computations of daily discharge furnished by Corps of Engineers. AVERAGE DISCHARGE (unadjusted).—98 years, 362 ft3/s (10.25 m3/s), 4.23 in/yr (107 mra/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum daily discharge, 2,520 ft3/s (71-4 mVs) June 7, 1957 (result of da-n failure); no flow at times. EXTREMES FOR CURRENT YEAR.—Maximum daily discharge, 1,300 ft3/s (36.8 m3/s) May 17; minimum daily, 99 ft 3/s (2.80 m3/ s ) Apr. 11, 12.

DISCHARGE, IN CUBIC FEET PSR SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 19S2 MEAN VALUES DAY OCT NOV DEC JAN PKB MAR APR MAY JUN JUL AUG 1 364 840 953 945 669 780 245 130 1210 497 116 198 2 364 840 955 829 676 800 245 130 1180 264 116 207 3 358 840 952 785 694 760 260 130 1180 116 116 198 4 384 840 952 835 727 760 255 130 1180 103 116 198 5 384 840 925 830 640 760 255 139 1170 104 116 198 6 420 840 947 757 690 760 255 138 1140 108 116 208 7 486 840 953 802 687 740 255 140 1190 108 116 208 8 530 840 951 799 692 780 212 297 1150 297 116 215 9 530 840 947 758 664 680 157 297 1130 288 116 208 10 625 840 923 739 685 684 100 310 1180 288 108 208 11 705 840 921 767 707 722 99 633 1170 297 108 208 12 743 840 924 766 707 682 99 880 1120 297 108 198 13 770 840 924 734 710 645 101 1170 1120 300 108 208 14 770 840 921 690 709 630 101 1110 1060 301 108 295 15 770 840 918 693 756 630 101 1170 1110 108 108 295 16 770 840 874 687 774 567 106 1150 1120 108 108 405 17 770 1010 854 685 740 450 110 1300 911 108 108 405 18 788 974 851 679 740 450 110 1210 932 115 108 405 19 788 970 850 705 760 391 110 1210 550 108 108 405 20 770 973 845 681 760 353 115 1170 495 115 108 405 21 770 994 850 682 780 353 115 1190 506 115 108 405 22 789 993 872 680 780 353 119 1200 506 310 108 405 23 789 967 951 636 860 312 119 1200 506 310 108 405 24 860 993 872 639 780 250 119 1210 515 338 108 405 25 840 965 945 667 760 250 124 1210 506 324 116 398 26 840 971 939 616 780 250 124 1200 506 324 198 405 27 840 1000 946 667 780 250 124 1200 506 324 186 388 28 840 976 835 665 780 250 124 1200 497 115 198 398 29 840 983 807 669 —— 250 130 1200 497 116 198 398 30 840 953 856 713 —— 250 130 1200 497 116 198 405 31 840 854 613 —— 255 1200 —— 116 190 — -- TOTAL 21177 27162 28067 22413 20487 16047 4519 26054 26340 6543 3948 9287 MEAN 683 905 905 723 732 518 151 840 878 211 127 310 MAX 860 1010 955 945 860 800 260 1300 1210 497 198 405 MIN 358 840 807 613 640 250 99 130 495 104 108 198 CPSM .59 .78 .78 .62 .63 .45 .13 .72 .76 .18 .11 .27 IN. .68 .87 .90 .72 .66 .51 .14 .83 .84 .21 .13 .30 GAL YR 1981 TOTAL 124324 MEAN 341 MAX 1010 MIN 99 CPSM .29 IN 3.98 WTR YR 1982 TOTAL 212044 MEAN 581 MAX 1300 MIN 99 CPSM .50 IN 6.78 MISSISSIPPI RIVER MAIN STEM 05210500 POKEGAMA LAKE NEAR GRAND RAPIDS, MN LOCATION.—Lat 47 O 10'00", long 93°33'20", in NW4 sec.17, T.54 N., R.25 W., Itasca County, Hydrologic Unit 07010101, at narrows on U.S. Highway 169, 4 mi (6 km) south of Grand Rapids and at mile 1,184 (1,905 km) upstream from Ohio River.

DRAINAGE AREA.—3,265 mi 2 (8,456 km 2 ). PERIOD OF RECORD.—April 1884 to current year. Prior to October 1941 monthend contents only, published in WSP 1308. Published as Pokegama Reservoir near Grand Rapids October 1941 to September 1956.

REVISED RECORDS.—WSP 1914: 1897(M). GAGE.—Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to May 30, 1949> nonrecording gage at Pooles Arm of Pokegama Lake 5 mi (8 km) northwest, and May 31, 1949, to July 12, 1973, water-stage recorder at same site and at datum 64.42 ft (19.635 m) higher.

REMARKS.—Reservoir is formed by Pokegama Lake and several other natural lakes controlled by concrete dam; storage began in 1884; original timber dam completed In 1884, replaced by present structure in 1888-89. Capacity between elevation 1,270.42 ft (387-224 m) and 1,276.42 ft (389-053 m) (maximum allowable range) is 80,126 acre-ft (98.8 hm 3 ) of which 52.483 acre-ft (64.7 hm 3 ) is controlled storage between elevations 1,270.42 ft (387.224 m) and 1,274.42 ft (388.443 m) (normal operating range). Contents shown herein are contents above elevation 1,267.00 ft (386.182 m). Prior to September 1978, published contents as contents above elevation 1,268.92 ft (386.767 m). Water is used to benefit navigation on Mississippi River below Minneapolis. COOPERATION.—Records furnished by Corps of Engineers. EXTREMES FOR PERIOD OF RECORD.—Maximum contents, 124,100 acre-ft (153 hm3 ) Apr. 30, 1979, elevation, 1,276.85 ft (389.184 m); maximum elevation, 1,277.92 ft (389-510 m) May 8, 1897; minimum contents observed, 4,520 acre -ft (5-57 hm3 ) below zero of capacity table then in use, Sept. 30, 1934, elevation, 1,268.54 ft (386.651 m). EXTREMES FOR CURRENT YEAR.—Maximum contents, 102,470 acre-ft (126 hm3 ) Apr. 26, elevation, 1,275.29 ft (388.708 m); minimum, 47,380 acre-ft (58.4 hm3 ) Mar. 26, elevation, 1,271.18 ft (387-456 m). MONTHEND ELEVATION AND CONTENTS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 Elevation Contents Change in contents Date (feet) (acre-feet) (acre-feet) Sept. 30 1273.50 77890 Oct. 31 1273.05 71790 -6100 Nov. 30 1272.23 60870 -10920 Dec. 31 1271.52 51690 -9180

CAL YR 1981 -8550 Jan. 31 1271.75 54640 +2950 Feb. 28 1271.40 50160 -4480 Mar. 31 1271.35 49530 -630 Apr. 30 1274.82 95990 +46460 May 31 1273.95 84030 -11960 June 30 1273.33 75580 -8450 July 31 1273.42 76810 +1230 Aug. 31 1273.45 77210 +400 Sept. 30 1273.32 75150 -1760 WTR YR 1982. -2440 44 MISSISSIPPI RIVER MAIN STEM 05211000 MISSISSIPPI RIVER AT GRAND RAPIDS, MN LOCATION.—Lat 47°13'56", long 93°31'48", In SW4NW4 sec.21, T.55 N., R.25 W., Itasca County, Hydrologic Unit 07010103, on left bank, in super-calendar room of Blandin Paper Mill in Grand Rapids, 400 ft (122 m) downstream from Blandin Dam, 400 ft (122 m) upstream from bridge on U.S. Highway 169, 2.5 mi (4.0 km) upstream from Prairie River, and at mile 1,182 (1,902 km) upstream from Ohio River. DRAINAGE AREA.—3,370 mi 2 (8,730 km ? ), approximately. PERIOD OP RECORD.—October 1883 to current year. Monthly discharge only for some periods, published in WSP 1308. Published as "at Pokegama Dam near Grand Rapids" 1942-44. GAGE.—Water-stage recorder. Datum of gage is 1,242.03 ft (378.571 m) National Geodetic Vertical Datum of 1929. See WSP 1914 for history of changes prior to Jan. 17, 1951. REMARKS.—Records fair. Plow regulated by Winniblproshish Lake (station 05201000), Leech Lake (station 05206000), Pokegama Lake (station 05210500) and occasionally at low flow by powerplant at Blandin Dam. Backwater from Prairie River occurs at times In most years. AVERAGE DISCHARGE.—99 years, 1,172 ft 3 /s (33.19 m3 /s); median of yearly mean discharges, 1,0'JO ftVs (29.5 m3 /s). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 12,500 ft 3 /s (354 m 3 /s) Sept. 3, 1948, gage height, 15.2 ft (4.633 m), from floodmark, caused by dan failure at <$age, from rating curve extended above 4,500 ftVs (127 m3/s); maximum daily, 5,250 ftVs (149 m^/s) Sept. 5, 8, 1905; no flow at times in several years. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 3,620 ft 3 /s (103 m^/s) Apr. 29, gage height, 10.43 ft (3.179 m); minimum daily, 16? ftVs (4.73 mVs) Apr. 17; minimum gage height, 2.11 ft (0.643 m) July 5.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN MAR APR MAY JUN JUL AUG SEP 1 1180 2670 2370 1900 2000 1850 1660 3360 2550 1920 1360 685 2 1160 2550 2360 1900 2000 1850 1760 3150 2680 1900 1330 705 3 1210 2610 2380 1900 2000 1850 1830 3060 2670 2000 1300 690 4 1230 2480 2380 1900 2000 1850 1530 2920 2590 1610 1280 690 5 1380 2510 2370 1900 2000 1830 1630 2840 2610 550 1270 700 6 1550 2420 2350 1890 2000 1820 1710 2420 2650 1480 1180 700 7 1700 2450 2310 1890 2000 1810 1710 I960 2670 1810 1220 710 8 1720 2330 2300 1890 2000 1800 1660 1660 2650 2200 1050 705 9 1640 2400 2250 1890 2000 1800 1550 1720 2700 2280 1150 710 10 1570 2350 2150 1890 2000 1800 1470 1780 2700 2350 1130 730 11 1560 2380 2000 1890 2000 1800 1360 1530 2700 2280 972 720 12 1560 2360 1950 1900 2000 1800 1310 1570 2700 2070 928 740 13 1540 2350 1900 1900 2000 1800 1240 1460 2750 1620 765 785 14 1640 2300 1900 1900 2000 1810 1150 1720 2780 1210 825 900 15 1750 2260 1900 1900 2000 1790 1260 2220 2700 1320 790 890 16 1870 2330 1900 1900 2000 1810 438 2450 2640 1270 800 988 17 i860 2500 1900 1900 2000 1710 167 2440 2570 1240 790 988 18 1840 2420 1900 1900 2000 1710 379 2460 2500 1260 775 982 19 1950 2420 1900 1900 1950 1650 319 2520 2480 1380 705 938 20 2210 2400 1900 1900 1950 1640 446 2740 2460 1650 795 994 21 2380 2380 1900 1920 1950 1600 645 2850 2360 1710 775 966 22 2490 2380 1900 1940 1900 1580 972 2790 2350 1710 785 972 23 2530 2390 1900 I960 1900 1550 1410 2720 2360 1740 805 955 24 2500 2310 1900 1980 1850 1550 1700 2670 2290 1790 755 977 25 2520 2390 1900 2000 1850 1570 2310 2650 2260 1790 810 950 26 2450 2420 1900 2000 1850 1590 2880 2690 2250 1800 780 999 27 2420 2390 1900 2000 1850 1580 3140 2650 2190 1710 725 955 28 2430 2380 1900 2000 1850 1580 3340 2610 1970 1690 665 960 29 2420 2400 1900 2000 — _ 1540 3470 2640 i860 1510 675 960 30 2490 2380 1900 2000 ___ 1610 3430 2650 1820 1300 685 977 31 2720 —— 1900 2000 —— 1650 2560 —— 1340 680 —— TOTAL 59470 72310 63270 59740 54900 53180 47876 75460 74460 51490 28555 25621 MEAN 1918 2410 2041 1927 1961 1715 1596 2434 2482 1661 921 854 MAX 2720 2670 2380 2000 2000 1850 3470 3360 2780 2350 1360 999 MIN 1160 2260 1900 1890 1850 1540 167 1460 1820 550 665 685 CAL YR 1981 TOTAL 407634 MEAN 1117 MAX 2720 MIN 144 WTR YR 1982 TOTAL 666332 MEAN 1826 MAX 3470 MIN 167 45 PRAIRIE RIV^R BASIN 05212700 PRAIRIE RIVER NEAR TACONITE, MN LOCATION.—Lat 47°23'20", long 93°22'50", in NWJSWJ sec.27, T.57 N., R.24 W., Itasca County, Hydrologic Unit 07010103, on left bank 125 ft (38 m) upstream from bridge on County Highway 7, 1.5 mi (2.4 km) downstream from outlet of Lawrence Lake and 5 mi (8 km) north of Taconite. DRAINAGE AREA.—360 ml 2 (932 km 2 ), approximately. PERIOD OP RECORD.—April 1967 to current year. GAGE.---Water-stage recorder. Datum of gage is 1,294.81 ft (394.65$ m) National Geodetic Vertical Datum of 1929. Prior to Aug. 31, 1967> nonrecording gage at site 125 ft (38 m) downstream at same datum.

REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE. —15 years, 228 ftVs (6.457 mVs), 8.60 in/yr (218 mm/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 3,250 ft'Vs (92.0 m^/s^ Apr. 17, 1969, gage height, 11.81 ft (3.600 m); minimum, 7-0 ft3/s (0.20 m3/s) Oct. 5, 1970; minimum gage height, 1.34 ft (0.408 m) Nov. 7, 1976, result of freezeup. EXTREMES POR CURRENT YEAR.--Maximum discharge, 1,900 ft^/s (53.? m^/s) Apr. 21, gage height, 9.92 ft (3-024 m); minimum, 64 ft3/s (1.81 m3/s) Sept. 9, 10, 11, 12, gage height, 2.46 ft (0.750 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN PEB MAR APR MAY .TUN JUL AUO SEP 1 96 381 106 72 73 90 87 1020 571 127 229 81 2 99 358 104 72 74 89 90 955 511 121 222 82 3 98 335 101 72 74 88 120 898 453 121 218 82 4 132 316 98 71 74 86 170 865 402 121 213 78 5 166 300 94 71 74 85 190 850 355 132 207 77 6 203 282 91 70 74 84 200 822 314 164 193 73 7 225 267 92 70 74 82 200 785 284 188 199 70 8 245 255 91 70 74 81 200 752 255 196 197 67 9 264 235 88 70 74 80 200 719 232 211 188 65 10 286 222 85 71 75 80 200 738 230 230 176 66 11 296 211 80 71 75 80 200 800 220 238 164 65 12 297 197 82 71 75 80 200 802 214 246 150 73 13 313 189 82 71 76 80 200 815 208 242 145 86 14 345 182 82 71 76 80 230 852 204 238 139 86 15 356 175 80 71 76 80 411 900 200 234 133 85 16 357 171 79 71 78 81 732 938 189 ?46 131 86 17 392 164 78 71 80 81 982 982 185 255 128 87 18 466 157 78 71 82 81 1220 1160 177 251 125 91 19 491 151 77 72 84 81 1480 1400 172 242 123 97 20 513 144 76 72 86 81 1740 1480 179 230 116 99 21 528 135 76 72 87 81 1870 1470 175 219 111 99 22 542 126 75 72 89 81 1870 1420 162 206 108 96 23 549 121 75 72 90 81 1810 1350 149 198 105 93 24 545 119 74 72 91 81 1710 1240 142 216 101 93 25 539 117 74 72 92 81 1590 1140 133 244 96 89 26 518 118 73 73 92 81 1470 1040 123 241 93 85 27 502 116 73 73 92 81 1360 950 120 236 90 81 28 476 112 73 73 91 81 1260 870 125 232 86 79 29 452 109 72 73 —— 82 1180 788 144 236 83 80 30 427 107 72 73 82 1090 707 137 244 82 83 31 405 —— 72 73 —— 84 —— 637 --- 236 81 —— TOTAL 11123 5872 2553 2219 2252 2546 24262 30145 6965 6541 4437 2474 MEAN 359 196 82.4 71.6 80.4 82.1 809 972 232 211 143 82.5 MAX 549 381 106 73 92 90 1870 1480 571 255 229 99 MIN 96 107 72 70 73 80 87 637 120 121 81 65 CPSM 1.00 .54 .23 .20 .22 .23 2.25 2.70 .64 .59 .40 .23 IN. 1.15 .61 .26 .23 .23 .26 2.51 3.11 .72 .68 .46 .26 CAL YR 1981 TOTAL 74381 MEAN 204 MAX 986 MIN 47 CPSM .57 IN 7.69 WTR YR 1982 TOTAL 101389 MEAN 278 MAX 1870 MIN 65 CPSM .77 IN 10.48 46 SWAN RIVER BASIN 05216860 SWAN RIVER NEAR CALUMET, MN LOCATION.—Lat 47°17'20", long 93°13'54", in NW4SWJ sec.35, T.56 N., R.23 W., Itasca County, Hydrologic Unit 07010103, on left bank 1.0 mi (1.6 km) downstream from Snowball Creek, 2.1 mi (3.4 km) downstream from bridge on U.S. Highway 65 at outlet of Swan Lake and 3.1 mi (5.0 km) southeast of Calumet. DRAINAGE AREA. —114 mi 2 (295 km 2 ). PERIOD OP RECORD.—January 1964 to current year. GAGE.—Water-stage recorder. Datum of gage is 1,331.19 ft (405-747 m) National Geodetic Vertical Datum of 1929. Prior to June 5, 1964, reference point at present site and datum. REMARKS.—Records fair. Natural flow of stream affected by continually changing iron-mining activities that include diversions for iron-ore processing, storage in tailing ponds and Swan Lake, and mine pit dewatering. AVERAGE DISCHARGE.—18 years, 65.7 ft 3 /s (1.861 m 3 /s). EXTREMES POR PERIOD OP RECORD.—Maximum discharge, 773 ft 3 /s (21-9 m 3 /s) Apr. 15, 1969, gage height. 5.83 ft (1.777 m); maximum gage height, 5.96 ft (1.817 m) Apr. 23, 1979; minimum discharge, 0.38 ft 3 /s (0.011 m3 /s) Oct. 14, 1976, gage height, 4.16 ft (1.268 m). EXTREMES POR CURRENT YEAR.—Maximum discharge, 358 ft 3 /s (10.1 m 3/s) May 19, gage height, 5.49 ft (1.673 m); minimum discharge, 23 ft 3 /s (0.65 m3 /s) Feb. 22, 23, 24, Mar. 17; minimum gage height, 4.58 ft (1.396 m) Feb. 22, 23, 24.

DISCHARGE, IN CUBIC PEEP PER SECOND, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY .TUN JUL AUG SEP 1 49 87 54 40 35 26 31 180 122 52 103 40 2 51 88 52 42 34 26 33 169 118 50 100 37 3 52 86 52 42 34 26 56 160 106 61 94 37 4 60 83 50 42 34 25 62 167 100 62 94 37 5 68 80 48 40 34 24 72 182 91 69 94 37 6 73 78 47 40 34 24 78 186 88 83 91 36 7 77 77 46 40 33 26 78 183 78 89 97 34 8 80 76 46 40 33 26 75 185 78 92 97 31 9 78 75 44 38 33 26 73 185 80 103 94 33 10 80 74 44 38 33 27 72 203 80 106 91 34 11 81 73 43 38 32 26 73 209 82 106 85 34 12 80 71 44 37 32 26 73 223 78 109 82 40 13 80 70 45 37 32 26 77 236 75 108 82 44 14 82 70 44 37 32 26 87 255 78 111 82 44 15 80 70 44 37 31 26 122 291 78 114 78 44 16 79 67 42 37 31 26 207 309 73 114 78 44 17 87 67 41 37 31 24 280 307 72 109 75 47 18 92 69 40 36 30 26 321 331 66 105 70 47 19 99 65 40 36 29 26 344 348 64 103 65 46 20 103 62 40 36 26 27 335 353 65 99 60 46 21 104 61 42 36 25 27 325 336 68 94 58 46 22 102 60 41 35 24 27 309 308 66 88 58 45 23 100 59 40 36 24 27 296 280 64 83 56 45 24 100 58 42 36 24 27 287 253 59 91 54 45 25 100 59 42 36 26 27 275 231 59 97 52 43 26 95 62 42 35 26 27 256 213 54 97 50 41 27 95 60 42 34 26 27 238 194 49 97 46 41 28 95 59 42 35 26 27 222 178 52 95 44 42 29 90 57 40 35 —— 27 207 164 57 99 40 39 30 88 56 40 34 —— 28 188 152 54 102 40 37 31 87 —— 40 35 —— 30 —— 136 103 40 TOTAL 2587 2079 1359 1157 844 816 5152 7107 2254 2891 2250 1216 MEAN 83.5 69.3 43.8 37-3 30.1 26.3 172 229 75.1 93.3 72.6 40.5 MAX 104 88 54 42 35 30 344 353 122 114 103 47 MIN 49 56 40 34 24 24 31 136 49 50 40 31 GAL YR 1981 TOTAL 20248 MEAN 55.5 MAX 166 MIN 18 WTR YR 1982 TOTAL 29712 MEAN 81.4 MAX 353 MIN 24 SANDY RIV3R BASIN 05218500 SANDY LAKE AT LIBBY, MN LOCATION.—Lat 46°47'20", long 93°19'10", in sec.25, T.50 N., R.24 W. , Aitkin County, Hydrologic Unit 07010103, on dam on Sandy River at Libby, 1.2 mi (1.9 km) upstream from mouth, and 14 mi (23 in) north of McGregor. DRAINAGE AREA.—421 mi 2 (1,090 km2 ). PERIOD OP RECORD.—July to December 1893, October to December 1894, July 1895 to current year. Monthend contents only for some periods, published in WSP 1308. Published as Sandy Lake Reservoir at Libby October 1941 to September 1956. GAGE.—Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to Sept. 23, 1949, nonrecordinp; gage and Sept. 24, 1949, to Nov. 28, 1962, water-stage recorder at site 1 mi (1.6 km) upstream at datum 1,207.71 ft (368.110 m) adjustment of 1912. Nov. 29, 1962, to June 30, 1973, water-stage recorder at present site at datum 1,207.71 ft (368.110 m) adjustment of 1912. REMARKS.—Lake is formed by concrete dam which controls Sandy, ^lowage, Snake, and Aitkin Lakes. Storage began in 1893; original timber crib dam completed in 1895, replaced by present structure in 1911. Capacity between elevation 1,214.31 ft (370.122 m) and 1,221.31 ft (372.255 m) (top of structure) is 73,037 acre-ft (90.0 hm3 ), of which 37,539 acre-ft (46.3 hm 3 ) is controlled storage between elevations 1,214.31 ft (370.122 m) and 1,218.31 ft (371.341 m) (normal operating range). Contents shown herein are contents above elevation 1,207.00 ft (367.894 m). Prior to September 1978, published contents as contents above elevation 1,209.03 ft (368.512 m). Water is used to benefit navigation on Mississippi River below Minneapolis. COOPERATION.—Records furnished by Corps of Engineers. EXTREMES TOR PERIOD OP RECORD.—Maximum contents, 167,200 acre-ft (206 hm 3 ) capacity table then in use, May 19, 1950, elevation, 1,224.82 ft (373-325 m); minimum observed, 5,950 acre-ft (7.34 hm3 ) below zero of capacity table then in use, Jan. 20, 1921, elevation, 1,207-96 ft (368.186 m). EXTREMES FOR CURRENT YEAR.—Maximum contents, 92.860 acre-ft (114 hm3 ) Apr. 26, elevation, 1,219.17 ft (371.603 m); minimum, 43,660 acre-ft (53.8 hm 3 ) Feb. 19-21, elevation, 1,214.04 ft (370.039 m). MOMTHEND ELEVATION AND CONTENTS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 Elevation Contents Change in contents Date (feet) (acre-feet) (acre-feet) Sept. 30, 1216.21 62450 Oct. 31. 1216.06 61060 -1390 Nov. 30. 1215.23 53610 -7450 De c. 31. 1214.81 50000 -3610 GAL YR 1981. -4490 Jan. 31. 1214,.18 44790 -5210 Feb. 28. 1214..12 44300 -490 Mar. 31. 1214,.52 47570 + 3270 Apr. 30 1219,.03 91270 +43700 May 31 1217.-51 75080 -16190 June 30 1216.37 63940 -11140 July 31 1216.36 63850 -90 Aug. 31 1216,.23 62630 -1220 Sept. 30 1216..12 61610 -1020 WTR YR 1982. -840 48 SANDY RIVER BASIN 05219000 SANDY RIVER AT SANDY LAKE DAM, AT LIBBY, MN LOCATION.--Lat 46°47'20", long 93°19'10", in sec.25, T.50 N., R.24 W. , Aitkin County, Hydrologic Unit 07010103, at dam at outlet of Sandy Lake, at Libby, 1.2 mi (1.9 km) above mouth, and 14 mi (23 km) north of McGregor. DRAINAGE AREA.—421 mi 2 (1,090 km 2 ). PERIOD OF RECORD.—July 1893 to March 1894, July 1894, November 1894 to March 1895, August 1895 to current year. Monthly discharge only for some periods, published in WSP 1308. Published as "below Sandy Lake Reservoir" 1893-1916. GAGE.—Water-stage recorders on headwater and tailwater. Datum of gages is National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to June 30, 1973, gages (nonrecording gages prior to June 20, 1949) at same site with datum at 1,207.71 ft (368.110 m) adjustment of'1912. REMARKS.--Discharge computed on basis of head over dam, using modified weir formula, head being obtained from headwater and tailwater recorder records. Flow completely regulated by Sandy Lake (station 05218500). COOPERATION.--Computations of daily discharge furnished by Corps of Engineers; discharge measurement made and records reviewed by Geological Survey. AVERAGE DISCHARGE (unadjusted).—87 years (water years 1896-1982), 216 ftVs (6.117 m3/s), 6.97 In/yr (177 mrn/yr). EXTREMES FOR PERIOD OF RECORD.—Maximum daily discharge, 3,740 ft 3/s (106 m3 /s) July 12, 1897; no flow at times. EXTREMES FOR CURRENT YEAR.—Maximum daily discharge, 1,840 ft3 /s (52.1 m3 /s) Apr. 27; minimum daily, 0 ft3/s (0.00 m3 /s) Apr. 16-20.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 20 984 188 151 126 20 21 974 1090 25 132 28 2 20 984 188 151 126 20 21 966 1100 26 133 28 3 20 704 190 151 72 20 100 966 1180 22 133 28 4 20 720 190 151 74 21 176 1060 816 22 133 28 5 19 720 190 151 74 21 492 1090 936 22 78 28 6 102 720 190 151 74 22 468 1090 552 20 78 28 7 522 408 188 151 74 22 468 1080 624 24 25 28 8 711 432 182 151 74 22 540 1180 330 24 25 28 9 666 432 185 151 74 22 512 1380 354 23 25 28 10 450 290 185 151 74 22 592 1580 472 175 25 28 11 462 300 171 151 74 22 592 1750 448 165 25 28 12 468 305 165 148 74 22 629 1750 180 156 25 28 13 462 305 162 148 74 22 666 1730 189 161 25 776 14 468 305 154 148 74 22 765 1730 198 163 26 588 15 456 305 148 148 74 22 648 1650 102 171 26 309 16 450 310 151 151 74 21 0 1550 56 179 27 594 17 1070 224 157 151 74 22 0 1550 56 185 26 570 18 1180 228 165 151 74 22 0 1440 14 187 27 475 19 1100 228 165 148 72 22 0 1250 14 24 27 445 20 1100 224 162 148 18 22 0 1030 15 24 27 388 21 1270 130 154 148 18 21 1800 1030 15 24 27 392 22 1220 134 151 146 18 21 1370 1010 15 79 27 396 23 1150 136 151 146 19 21 1380 908 15 78 27 396 24 1100 136 148 143 19 21 1090 908 23 78 27 396 25 1100 136 146 134 19 21 1120 898 23 78 27 250 26 1080 188 148 137 20 21 1230 898 23 76 27 255 27 1060 188 148 134 20 21 1840 898 23 75 27 255 28 1060 188 151 134 20 21 1440 898 23 75 27 255 29 1060 188 151 134 —— 21 1240 1070 24 75 27 253 30 1060 188 151 129 _ — 21 1110 1020 24 78 28 253 31 1010 —— 151 126 —— 22 —— 1080 —— 129 28 —— TOTAL 21936 10740 5126 4513 1677 663 20310 37414 8934 2643 1347 7582 MEAN 708 358 165 146 59.9 21.4 677 1207 298 85.3 43.5 253 MAX 1270 984 190 151 126 22 1840 1750 1180 187 133 776 MIN 19 130 146 126 18 20 .00 898 14 20 25 28 CFSM 1.68 .85 .39 .35 .14 .05 1.61 2.87 .71 .20 .10 .60 IN. 1.94 .95 .45 .40 .15 .06 1.79 3.31 .79 .23 .12 .67 CAL YR 1981 TOTAL 100828 .00 MEAN 276 MAX 1390 MIN 16 CFSM .66 IN 8.91 WTR YR 1982 TOTAL 122885 .00 MEAN 337 MAX 1840 MIN .00 CFSM .80 IN 10.86 49 MISSISSIPPI RIVER MAIN STEM 05220500 MISSISSIPPI RIVER BELOW SANDY RIVER, NEAR LIBBY, MN LOCATION.—Lat 46°47'23", long 93°19'43", in SEJNEi sec.25, T.50 N., R.24 W., Aitkin County, Hydrologic Unit 07010103, on right bank 600 ft (183 m) downstream from Sandy River, 0.8 mi (1.3 km) northwest of Libby, and at mile 1,106 (1,780 km) upstream from Ohio River. DRAINAGE AREA.—5,060 mi 2 (13,110 km2 ), approximately. PERIOD OP RECORD.—April 1930 to current year. REVISED RECORDS.—WSP 1914: 1958. GAGE.—Water-stage recorder. Datum of gage is 1,201.06 ft (366.997 m) National Geodetic Vertical Datum of 1929. Prior to July 28, 1931, nonrecording gage at site 600 ft (183 m) upstream at datum 3.16 ft (0.96 m) higher. REMARKS.—Records good except those for winter period, which are fair. Plow regulated by Winnibigoshish Lake (station 05201000), Leech Lake (station 05206000), Pokegama Lake (station 05210500), and Sandy Lake (station 05218500). AVERAGE DISCHARGE.—52 years, 2,038 ft3/s (57.72 m^/s), 5.47 in/yr (139 mm/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 16,000 ftVs (^53 m3 /s) May 17, 1950, gage height, 20.02 ft (6.102 m); minimum, 83 ft3/ s (2.35 m3/ s ) Nov. 16, 1936, gage height, 1.41 ft (O.t39 m). EXTREMES FOR CURRENT YEAR.—Maximum discharge. 7,190 ftVs (204 mVs) Apr.30,'gage height, 14.31 ft (4.362 m); mimimum daily discharge, 867 ft3/ s (24.6 mVs) Sept. 11; minimum gage height, 3.15 ft (0.9^0 m) Sept. 11.

DISCHARGE, IN CUBIC PEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 1740 4480 3050 2300 2250 2100 2340 7160 5800 2680 2090 996 2 1820 4410 3020 2300 2250 2090 2400 7110 5620 2590 2120 986 3 1890 4280 3000 2300 2250 2080 2450 7030 5350 2620 2080 944 4 1990 4220 2990 2300 2250 2070 2600 6930 5060 2640 1990 904 5 2180 4180 2980 2300 2250 2060 2750 6930 4820 2620 1890 939 6 2500 4020 2950 2300 2250 2050 2900 6900 4530 2290 1840 948 7 2930 3840 2800 2300 2250 2040 3100 6810 4350 1940 1800 949 8 3210 3760 2850 2300 2250 2030 3110 6650 4120 2260 1760 1010 9 3260 3640 2800 2300 2250 2030 3140 6410 4060 2630 1730 971 10 3150 3510 2750 2300 2250 2020 3120 6210 4190 2940 1700 882 11 3090 3460 2700 2290 2250 2000 3110 6140 4080 3090 1750 867 12 3020 3440 2650 2290 2250 2000 3150 6060 3890 3140 1720 1050 13 3020 3410 2600 2290 2250 2000 3230 6030 3760 310.0 1570 1520 14 3170 3400 2550 2280 2250 2000 3400 6020 3600 2950 1490 1450 15 3310 3370 2500 2280 2250 2000 4000 6060 3510 2650 1340 1530 16 3550 3300 2500 2280 2250 2000 4800 6070 3500 2420 1330 1730 17 3990 3190 2450 2270 2250 2000 5160 6110 3460 2340 1300 1780 18 4220 3190 2430 2270 2240 2000 5220 6320 3390 2200 1250 1830 19 4290 3210 2410 2270 2220 2000 5360 6520 3330 2010 1260 1780 20 4360 3180 2390 2260 2210 2000 5850 6600 3310 1990 1240 1700 21 4480 3120 2370 2260 2200 2000 6470 6640 3300 2190 1180 1670 22 4550 3060 2350 2260 2180 2000 6600 6670 3280 2360 1220 1650 23 4610 3030 2330 2250 2160 2000 6580 6690 3230 2350 1220 1640 24 4660 3040 2310 2250 2140 2050 6370 6690 3220 2340 1210 1610 25 4680 3050 2300 2250 2130 2050 6380 6660 3220 2400 1150 1540 26 4670 3070 2300 2250 2120 2100 6600 6600 3190 2480 1130 1530 27 4650 3080 2300 2250 2110 2100 6890 6520 3130 2520 1160 1530 28 4620 3080 2300 2250 2110 2200 7030 6400 3050 2460 1120 1540 29 4580 3070 2300 2250 —— 2260 7130 6250 2990 2370 1060 1560 30 4540 3060 2300 2250 —— 2280 7180 6100 2840 2320 996 1630 31 4500 —— 2300 2250 —— 2300 —— 5960 —— 2170 994 TOTAL 111230 104150 79830 70550 62070 63910 138420 201250 115180 77060 45690 40666 MEAN 3588 3472 2575 2276 2217 2062 4614 6492 3839 2486 1474 1356 MAX 4680 4480 3050 2300 2250 2300 7180 7160 5800 3140 2120 1830 MIN 1740 3030 2300 2250 2110 2000 2340 5960 2840 1940 994 867 CPSM .71 .69 .51 .45 .44 .41 .91 1.28 .76 .49 .29 .27 IN. .82 .77 .59 .52 .46 .47 1.02 1.48 .85 .57 .34 .30 CAL YR 1981 TOTAL 729739 MEAN 1999 MAX 4680 MIN 420 CPSM .40 IN 5.36 WTR YR 1982 TOTAL 1110006 MEAN 3041 MAX 7180 MIN 867 CPSM .60 IN 8.16 50 MISSISSIPPI RIVER MAIN STEM

05227500 MISSISSIPPI RIVER AT AITKIN, MN LOCATION.—Lat 46°32'26", long 93°42'26", in SW4NW4 sec.24, T.47 N., R.27 W., Aitkin County, Hydrologic Unit 07010104, on right bank upstream side of highway bridge at north edge of Aitkin, 1 mi (1.6 km) downstream from Ripple River and at mile 1,055.9 (1,698.9 km) upstream from Ohio River. DRAINAGE AREA. —6,140 mi 2 (15,900 km2 ), approximately. PERIOD OP RECORD.—March 1945 to current year. GAGE.—Water-stage recorder. Datum of gage is 1,182.41 ft (360.40 m) National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Mar. 1, 1945, to Mar. 14, 1961, nonrecording gage, and Mar. 15, 1961, to Sept. 30, 1967, water-stage recorder at same site at datum 3.0 ft (0.9 m) higher. Diversion channel: Non-recording • gage. Datum of gage is 1,182.02 ft (360.28 m) National Geodetic Vertical Datum of 1929- Apr. 9, 1955, to Apr. 10, 1956, nonrecording gage at site 4 mi (6 km) downstream at different datum. Apr. 11, 1956, to Sept. 30, 1967, nonrecording gage at same site at datum 3.0 ft (0.9 m) higher. REMARKS.—Records good except those for winter period, which are fair. Flow regulated by Winnibigoshish Lake (see sta 05201000), Leech Lake (see sta 05206000), Pokegama Lake (see sta 05210500), and Sandy Lake (see sta 05218500). Water diverted at medium and high stages into Aitkin diversion channel 6.5 mi (10.5 km) above station, bypasses station and returns to river 15.5 mi (24.9 km) below station. Diversion began Apr. 2, 1955- These records include flow in diversion channel. AVERAGE DISCHARGE. —37 years, 2,901 ft 3 /s (82.16 m3 /s), 6.42 in/yr (163 mm/yr). EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 20,000 ft 3 /s (566 m 3/s) May 20, 1950, gage height, 22.49 ft (6.855 m), present datum; minimum, 151 ft 3 /s (4.28 mVs) Sept. 1, 1961, gage height, 0.60 ft (0.183 m). EXTREMES FOR CURRENT YEAR.—Maximum daily discharge, 12,200 ft 3 /s (346 m 3/s) Apr. 24; minimum daily, 900 ft 3/s (25-5 m 3 /s) Sept. 11, 12. River gage: Maximum discharge, 6,510 ft 3 /s (184 np/s) Apr. 24, gage height, 16.02 ft (4.883 m); minimum daily, 900 ft 3/s (25.5 m3/s) Sept. 11, 12. Diversion gage: Maximum discharge, 5,660 ft 3 /s (l60 m3 /s) Apr. 24, gage height, 16.18 ft (4.932 m), from graph based on gage readings; no flow on many days.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 1800 5480 3250 2320 2210 2070 2570 10500 7930 2960 2250 1030 2 1790 5430 3240 2320 2200 2070 2750 10300 7510 2840 2140 1040 3 i860 5330 3230 2320 2200 2070 3000 10000 7130 2670 2140 1010 4 2060 5200 3170 2320 2200 2070 3250 9730 6770 2610 2100 992 5 2170 5120 3110 2310 2200 2020 3600 9610 6340 2620 2030 964 6 2340 5030 3000 2310 2200 2020 4000 9420 5970 2610 1920 960 7 2630 4840 2950 2300 2200 2020 4400 9260 5490 2440 1850 954 8 3230 4650 2850 2300 2200 2020 4550 9120 5230 2150 1800 971 9 3570 4480 2800 2300 2200 2010 4600 8970 4880 2270 1760 1000 10 3680 4310 2700 2300 2190 2010 4650 8820 4740 2540 1710 970 11 3660 4110 2500 2300 2190 2010 4850 8740 4740 2950 1680 900 12 3620 4020 2380 2300 2180 2010 5300 8610 4650 3130 1690 900 13 3580 3970 2380 2300 2180 2010 5900 8660 4510 3240 1680 1060 14 3640 3920 2450 2290 2180 2010 6800 8720 4240 3380 1590 1370 15 3990 3900 2550 2290 2180 I960 8100 8760 4040 3210 1500 1540 16 4380 3840 2550 2290 2180 I960 9600 8810 3840 2940 1390 1690 17 4700 3760 2500 2280 2180 I960 10500 8810 3810 2630 1330 1900 18 5070 3650 2500 2280 2180 I960 11100 9070 3700 2440 1300 1990 19 5410 3580 2400 2280 2130 2000 11100 9400 3610 2290 1360 2060 20 5680 3540 2370 2280 2130 2000 11200 9580 3520 2160 1320 2050 21 5810 3450 2370 2280 2120 2000 11500 9690 3490 2100 1280 2000 22 5920 3360 2380 2280 2120 2000 11800 9700 3480 2180 1270 1950 23 6000 3270 2350 2280 2120 2000 12100 9630 3440 2320 1260 1890 24 6030 3290 2380 2270 2120 2000 12200 9540 3370 2360 1250 i860 25 6030 3320 2390 2270 2120 2000 12000 9400 3380 2350 1240 1830 26 5970 3300 2390 2270 2120 2060 11800 9350 3380 2400 1200 1740 27 5910 3290 2390 2260 2120 2060 11500 9250 3340 2490 1170 1700 28 5810 3280 2390 2260 2070 2120 11300 8920 3270 2560 1160 1660 29 5730 3280 2380 2260 __ 2140 11000 8720 3220 2550 1170 1670 30 5630 3260 2380 2260 __ 2210 10800 8570 3140 2450 1160 1670 31 5560 —— 2380 2210 —— 2350 —— 8380 —— 2380 1100 —— TOTAL 133260 121260 81060 70890 60620 63200 237820 286040 136160 80220 47800 43321 MEAN 4299 4042 2615 2287 2165 2039 7927 9227 4539 2588 1542 1444 MAX 6030 5480 3250 2320 2210 2350 12200 10500 7930 3380 2250 2060 MIN 1790 3260 2350 2210 2070 I960 2570 8380 3140 2100 1100 900 CFSM .70 .66 .43 .37 .35 .33 1.29 1.50 .74 .42 .25 .24 IN. .81 .73 .49 .43 .37 .38 1.44 1.73 .82 .49 .29 .26 CAL YR 1981 TOTAL 890460 MEAN 2440 MAX 6100 MIN 540 CFSM .40 IN 5-39 WTR YR 1982 TOTAL 1361651 MEAN 3731 MAX 12200 MIN 900 CFSM .61 IN 8.25 51 PINE RIVER BASIN 05230500 PINE RIVER RESERVOIR AT CROSS LAKE, MN LOCATION.—Lat 46°40'09", long 94°06'44", in SWJNWt sec.21, T.137 N., R.27 W., Crow Wing County, Hydrologic Unit 07010105, at dam on Pine River, at outlet of Cross Lake at village of Cross Lake. DRAINAGE AREA.—562 mi2 (1,456 km2 ). PERIOD OP RECORD.—March 1886 to current year. Monthend contents only for some periods, published in WSP 1308. GAGE.—Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to May 3, 1949, nonrecording gage at same site and datum. REMARKS.—Reservoir is formed by Trout, Whitefish, Rush, and Cross Lakes and several other natural lakes controlled by timber crib dams; storage began in 1886; dam completed in 1886. Capacity between elevations 1,226.32 ft (373.J82 m) and 1,234.82 ft (376.373 m)>(maximum allowable range) is 118,703 acre-ft (146 hnP) of which 53,272 acre-ft (65-7 hnP) is controlled storage between elevations 1,226.32 ft (373-782 m) and 1,230.32 ft (375.002 m) (normal operating range). Contents shown herein are contents above an elevation 1,216.00 ft (340.157 m). Prior to September 1978, published contents as contents above elevation 1,218.67 ft (371.451 m). Water is used to benefit navigation on Mississippi River below Minneapolis. COOPERATION.—Records furnished by Corps of Engineers. EXTREMES FOR PERIOD OP RECORD.—Maximum contents observed, 173,600 acre-ft (214 hm^) capacity table then in use, July 10, 1916, elevation, 1,234.56 ft (376.294 m); minimum observed, 1,310'acre-ft (1.62 hnp) below zero of capacity table then in use, Aug. 20, 1918, elevation, 1,217.67 ft (371.146 m). EXTREMES FOR CURRENT YEAR.—Maximum contents, 105,260 acre-ft (130 hm3) May 21, elevation, 1,229.69 ft (374.810 m); minimum, 71,610 acre-ft (88.3 hm3) Feb. 17-19, elevation, 1,227.17 ft (374.041 m). MONTHEND ELEVATION AND CONTENTS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 Elevation Contents Change in contents Date (feet) (acre-feet) (acre-feet) Sept. 30 1229.19 98440 Oct. 31 1229.13 97620 -820 Nov. 30 1228.53 89540 -8080 Dec. 31 1228.62 90750 +1210 CAL YR 1981 -1750 Jan. 31 1227.45 75260 -15490 Feb. 28 1227.27 72910 -2350 Mar. 31 1227.78 79590 +6680 Apr. 30 1229.07 96810 +17220 May 31 1229.40 101290 +4480 June 30 1229.43 101700 +410 July 31 1229.29 99790 -1910 Aug. 31 1229.23 98980 -810 Sept. 30 1229.23 98980 0 WTR YR 1982 +540 52 PINE RIVER BASIN 05231000 PINE RIVER AT CROSS LAKE DAM, AT CROSS LAKE, MN LOCATION.—Lat 46°40'09", long 94°06'44", in SWJNW4 sec.21, T.137 N., R.27 W., Crow Wing County, Hydrologic Unit 07010105, at dam at outlet of Cross Lake at Village of Cross Lake. DRAINAGE AREA.—562 mi 2 (1,456 km 2 ). PERIOD OP RECORD.—April 1886 to current year. Monthly discharge only for some periods, published in WSP 1308. Published as "below Pine River Reservoir" 1895-1916, 1929, and as "at Pine River Dam, at Cross Lake" 1941-56. GAGE.—Water-stage recorder, headwater gage, and nonrecording tailwater gage. Datum of gages is 1,216.32 ft (370.734 m) National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Mar. 26, 1886, to May 31, 1929, nonrecording gages on headwater'and tail water at same sites and datum. June 1 to Nov. 30, 1929, non- recording gage in tailwater at datum 1.60 ft (0.49 m) lower. Dec. 1, 1929, to May 2, 1949, nonrecording gage on headwater and Dec. 1, 1929, to August 1949, nonrecording gage on tailwater at present sites and datum. REMARKS.—Discharge computed principally on basis of modified weir formula, the head being obtained from twice- daily readings on tailwater gage and from headwater recorder. Flow completely regulated by Pine River Reservoir (station 05230500). COOPERATION.—Computations of daily discharge furnished by Corps of Engineers. AVERAGE DISCHARGE (unadjusted).—96 years, 217 ft 3 /s (6.145 mVs), 5.24 in/yr (133 mm/yr). EXTREMES FOR PERIOD OF RECORD.—Maximum daily discharge, 2,250 ft 3 /s (63.7 m 3 /fs) in June 1896 (does not include flow bypassing dam through crevasse); no flow at times. EXTREMES FOR CURRENT YEAR.—Maximum daily discharge, 1,600 ftVs (45.3 mVs) May 22-24; minimum daily, 30 ftVs (0.85 m3/s) Aug. 10-Sept. 13.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 75 420 150 150 610 100 102 250 830 150 125 30 2 75 420 150 150 348 100 102 250 590 150 125 30 3 75 420 150 150 450 100 106 250 590 150 70 30 4 140 420 150 150 450 100 106 250 590 150 70 30 5 140 420 150 150 450 100 106 450 263 150 70 30 6 236 420 150 150 345 100 225 550 250 150 70 30 7 250 420 150 150 330 100 225 550 250 150 70 30 8 250 420 150 150 330 100 230 430 160 448 70 30 9 250 420 150 150 330 100 230 430 160 490 70 30 10 250 420 150 150 200 100 307 430 160 243 30 30 11 250 420 150 150 200 100 300 430 160 220 30 30 12 250 420 150 150 200 100 300 430 243 220 30 30 13 410 420 150 150 200 100 360 430 260 275 30 30 14 515 420 150 150 200 100 360 430 260 275 30 125 15 530 420 150 334 200 100 382 660 260 275 30 125 16 530 420 150 412 200 100 416 660 453 275 30 395 17 400 260 150 412 200 100 416 660 480 275 30 395 18 400 260 150 412 200 100 461 950 486 275 30 200 19 400 260 150 610 200 100 472 1350 223 275 30 200 20 560 260 150 610 100 100 552 1350 200 181 30 200 21 560 260 150 610 100 100 568 1350 200 150 30 200 22 560 260 150 610 100 100 552 1600 200 200 30 113 23 560 260 150 610 100 100 552 1600 150 200 30 100 24 560 260 150 610 100 100 552 1600 150 125 30 100 25 560 260 150 610 100 100 552 1180 150 125 30 100 26 560 260 150 610 100 100 545 1100 150 125 30 100 27 300 260 150 610 100 100 234 1100 150 125 30 100 28 300 260 150 610 100 100 234 1100 150 125 30 60 29 300 260 150 610 —— 100 234 875 150 125 30 60 30 300 260 150 610 ___ 100 234 830 150 125 30 60 31 420 —— 150 610 — 100 —— 830 125 30 —— TOTAL 10966 10360 4650 11600 6543 3100 10015 24355 8462 6327 1400 3023 MEAN 354 345 150 374 234 100 334 786 282 204 45.2 101 MAX 560 420 150 610 610 100 568 1600 830 490 125 395 MIN 75 260 150 150 100 100 102 250 150 125 30 30 CFSM .63 .61 .27 .67 .42 .18 .59 1.40 .50 .36 .08 .18 IN. .73 .69 .31 .77 .43 .21 .66 1.61 .56 .42 .09 .20 CAL YR 1981 TOTAL 73700 MEAN 202 MAX 560 MIN 40 CFSM .36 IN 4.88 WTR YR 1982 TOTAL 100801 MEAN 276 MAX 1600 MIN 30 CFSM .49 IN 6.67 53 CROW WING RIVER BASIN 05245100 LONG PRAIRIE RIVER AT LONG PRAIRIE, MN LOCATION.—Lat 45°58'30", long 94°51'56", in NEJNW4 sec.20, T.129 N., R.33 W., Todd County, Hydrologic Unit 07010108, on right bank 90 ft (27 m) upstream from bridge on First Avenue at Long Prairie and 400 ft (122 m) downstream from Venewitz Creek. DRAINAGE AREA.--432 mi 2 (1,119 km2 ). PERIOD OP RECORD.—October 1971 to current year. GAGE.—Water-stage recorder. Datum of gage is 1,281.74 ft (390.674 m) National Geodetic Vertical Datum of 1929- REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.--11 years, 145 ft 3/s (4.106 m3/s), 4.56 in/yr (116 mm/yr). EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 3,270 ft 3/s (92.6 m3/s) July 22, 1972, gage height, 9-37 ft (2.856 m); minimum daily, 0.84 ft3/s (0.02 nH/s) Jan. 12-18, 1977. EXTREMES FOR CURRENT YEAR.—Maximum discharge. 1,260 ft 3/s (35-7 m3/s) Apr. 5, gage height, 7.54 ft (2.298 m) (backwater from ice); minimum daily,ly, 34 ft3/s (0.96 m3/s) Dec. 17 to Jan. 31, Mar. 8-11; minimum gage height, 1.36 ft (0.415 m) Dec. 5 (backwater'from ice).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 69 88 56 34 35- 3 § 505 283 283 182 118 78 2 68 86 56 34 36 38 530 275 266 169 112 76 3 69 82 52 34 38 38 670 266 251 165 107 70 4 82 80 45 34 38 36 895 261 240 154 103 68 5 79 79 42 34 40 36 1130 264 223 141 104 70 6 84 77 45 34 40 35 950 268 219 154 102 70 7 83 76 50 34 43 35 840 271 230 192 99 69 8 84 75 44 34 43 34 735 264 236 196 96 71 9 83 73 42 34 43 34 660 259 227 206 93 71 10 83 71 40 34 43 34 560 257 220 210 89 69 11 80 71 40 34 43 34 525 252 212 208 86 68 12 79 71 40 34 43 36 577 252 204 201 83 83 13 96 69 38 34 43 36 616 269 193 193 82 94 14 142 69 38 34 43 36 766 302 183 190 79 91 15 141 68 36 34 43 38 896 325 179 179 77 101 16 144 68 35 34 43 40 916 362 175 226 75 102 17 152 68 34 34 43 40 808 432 171 248 85 101 18 163 68 34 34 40 40 724 590 169 248 87 101 19 159 66 34 34 40 42 650 619 164 248 83 96 20 157 53 34 34 38 50 577 588 161 251 77 91 21 143 49 34 34 38 58 519 556 159 247 74 86 22 129 56 34 34 38 58 472 522 155 229 72 80 23 115 54 34 34 38 58 434 472 151 204 74 78 24 102 57 34 34 38 60 401 431 241 184 73 75 25 104 61 34 34 38 62 376 395 278 176 72 75 26 106 60 34 34 38 62 355 361 283 161 74 73 27 102 55 34 34 38 62 338 340 262 148 78 70 28 99 54 34 34 38 65 324 319 236 142 76 70 29 95 58 34 34 82 304 307 222 137 74 80 30 93 58 34 34 ___ 114 289 302 200 128 74 77 31 90 —— 34 34 —— 305 —— 290 —— 123 74 —— TOTAL 3275 2020 1209 1054 1122 1736 18342 10954 6393 5840 2652 2404 MEAN 106 67.3 39.0 34.0 40.1 56.0 611 353 213 188 85.5 80.1 MAX 163 88 56 34 43 305 1130 619 283 251 118 102 MIN 68 49 34 34 35 34 289 252 151 123 72 68 CFSM .25 .16 .09 .08 .09 .13 1.41 .82 .49 .44 .20 .19 IN. .28 .17 .10 .09 .10 .15 1.58 .94 .55 .50 .23 .21 CAL YR 1981 TOTAL 35129 MEAN 96.2 MAX 251 MIN 34 CFSM .22 IN 3.02 WTR YR 1982 TOTAL 57001 MEAN 156 MAX 1130 MIN 34 CFSM .36 IN 4.91 54 CROW WING RIVER BASIN 05216500 GULL LAKE NEAR BRAINERD, MN LOCATION.—Lat 46°24' 40", long 94°21'26", in NJ sec.20, T.134 N., R.29 W., Cass County, Hydrologic Unit 07010106, in pool of dam on Gull River, 800 ft (244 m) south of outlet of Gull Lake, 0.2 mi (0.3 km) upstream from Gull Lake Dam, and 8 mi (13 km) northwest of Brainerd. DRAINAGE AREA.—28? mi 2 (743 km2 ). PERIOD OP RECORD.—August 1911 to current year. Prior to October 1941 monthend contents only, published in WSP 1308. Published as Gull Lake Reservoir October 1941 to September 1956. GAGE.—Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (levels by Corps of Engin­ eers). Prior to Aug. 10, 1949, nonrecording gage 800 ft (244 m) north of present site at same datum. Aug. 11, 1949, to June 30, 1973, water-stage recorder at present site and at datum 1,188.14 ft (362.145 m) adjustment of 1912. REMARKS.—Reservoir is formed by Gull Lake and several other natural lakes controlled by concrete dam completed in 1913; storage began in 1912. Capacity between elevation 1,192.75 ft (363.550 m) and 1,194.75 ft (364.160 m) (maximum allowable range and normal operating range) is 26,008 acre-ft (32.1 hm3 ). Contents shown herein are contents above elevation 1,188.00 ft (362.102 m). Prior to September 1978, published contents as contents above elevation 1,188.75 ft (362.331 m). Water is used to benefit navigation on Mississippi River below Minneapolis. COOPERATION.--Records furnished by Corps of Engineers. EXTREMES FOR PERIOD OP RECORD.—Maximum contents, 74,800 acre-ft (92.2 hm3 ) capacity table then in use, June 30, 1914, elevation, 1,195.05 ft (364.251 m); minimum observed, 22,250 acre-ft (27.4 hnP) capacity table then in use, Mar. 20, 1924, elevation, 1,190.75 ft (362.941 m). EXTREMES POR CURRENT YEAR.—Maximum contents, 69,870 acre-ft (86.1 hm3 ) May 20, 21, elevation, 1,194.62 ft (364.120 m); minimum, 45,440 acre-ft (56.0 hm3 ) Mar. 19, elevation, 1,192.74 ft (363-547 m). MONTHEND ELEVATION AND CONTENTS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 Elevation Contents Change in contents Date (feet) (acre-feet) (acre-feet) Sept. 30. 1193-85 59800 Oct. 31. 1193.83 59540 -260 Nov. 30 1193.39 53830 -5710 Dec. 31 1193.16 50860 -2970 CAL YR 1981 -3620 Jan. 31 1193.00 48790 -2070 Feb. 28 1192.80 46210 -2580 Mar. 31 1192.78 45950 -260 Apr. 30 1193.95 61110 +15160 May 31 1194.25 65020 +3910 June 30 1194.05 62410 -2610 July 31 1193-93 60850 -1560 Aug. 31 1193.81 59280 -1570 Sept. 30 1193.92 60720 +1440 WTR YR 1982 +920 55 CROW WING RIVER BASIN 05247000 GULL RIVER AT GULL LAKE DAM, NEAR BRAINERD, MN LOCATION.— Lat 46°24'40", long 94°21'12", in sec. 20, T.134 N., R.29 W., Cass County, Hydrologic Unit 07010106, in headwater and tailwater of dam at outlet of Gull Lake, 8 mi (13 km) northwest of Brainerd. DRAINAGE AREA.— 287 mi 2 (743 km 2 ). PERIOD OP RECORD. — August 1911 to current year. Monthly discharge only for some periods, published in WSP 1308. Published as "Gull Lake Reservoir" 1929. GAGE. — Water-stage recorder on headwater and nonrecording gage on tailwater. Datum of gages is National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). August 1911 to May 23, 1929, and Dec. 1, 1929, to Aug. 1, 19*19, both gages were nonrecording gages at same site and datum in use. May 24 to Nov. 30, 1929, non- recording gage 500 ft (152 m) downstream at different datum. Aug. 2, 1949, to June 30, 1973, at present sites with datum of gage at 1,188. 14 ft (362.145 m) adjustment of 1912. REMARKS. — Discharge computed at dam on basis of modified weir formulas, the head being obtained from twice-daily readings on tailwater gage and from headwater recorder. Flow completely regulated by Gull Lake (station 05246500). COOPERATION. — Computations of daily discharge furnished by Corps of Engineers. AVERAGE DISCHARGE (unadjusted). — 71 years, 107 ftVs (3.030 mVs), 5.06 in/yr (129 mm/yr). EXTREMES FOR PERIOD OF RECORD. — Maximum daily discharge, 1,120 ft 3/s (31-7 m3/ s ) May 15, 1938; no flow at times. EXTREMES PQR CURRENT YEAR. — Maximum daily discharge, 568 ftVs (16.1 Apr. 21; minimum daily, 20 ft3 /s (0.57 m3/s) Oct. 1-5.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 20 240 112 106 102 100 102 243 513 250 32 31 2 20 240 108 106 102 100 102 243 480 245 32 31 3 20 240 108 106 102 100 106 243 500 165 32 31 4 20 240 108 106 102 100 106 120 500 140 32 31 5 20 240 108 106 102 100 106 122 120 140 32 31 6 88 240 106 102 102 100 225 122 120 140 32 31 7 162 240 106 102 102 100 225 122 120 140 32 31 8 162 240 106 104 102 100 230 210 120 245 32 31 9 162 240 106 102 102 100 230 210 120 245 32 31 10 162 240 106 100 102 100 307 210 120 245 31 31 11 162 240 106 100 102 100 300 210 120 245 31 31 12 162 230 106 100 102 100 300 210 120 240 31 31 13 162 230 106 100 102 100 360 210 120 140 31 31 14 162 230 106 102 102 100 360 330 120 140 31 31 15 162 230 106 102 102 100 382 330 53 140 31 31 16 162 230 106 100 102 100 416 500 53 140 31 196 17 165 96 106 100 102 100 416 500 53 240 31 196 18 168 100 106 100 102 100 461 512 53 240 31 94 19 168 100 106 102 102 100 472 525 93 240 31 94 20 168 100 106 102 102 100 552 550 93 137 31 94 21 168 96 106 102 102 100 568 550 93 137 31 94 22 240 96 106 102 102 100 552 550 93 137 31 94 23 240 96 106 104 102 100 552 550 93 137 31 50 24 240 96 106 100 102 100 552 540 93 59 31 50 25 240 96 106 102 102 100 552 525 250 59 31 50 26 240 96 106 102 102 100 545 525 250 59 31 50 27 240 96 106 102 102 100 234 525 250 59 31 50 28 240 96 106 100 102 100 234 512 245 59 31 50 29 240 96 106 104 —— 100 234 512 137 59 31 50 30 240 96 106 102 —— 100 234 512 250 59 31 50 31 240 —— 106 102 —— 100 —— 500 —— 33 31 —— TOTAL 5045 5146 3300 3170 2856 3100 10015 11523 5345 4714 970 1727 MEAN 163 172 106 102 102 100 334 372 178 152 31.3 57.6 MAX 240 240 112 106 102 100 568 550 513 250 32 196 MIN 20 96 106 100 102 100 102 120 53 33 31 31 CFSM .57 .60 .37 .36 .36 .35 1.16 1.30 .62 .53 .11 .20 IN. .65 .67 • 43 .41 .37 .40 1.30 1.49 .69 .61 .13 .22 GAL YR 1981 TOTAL 34183 MEAN 93.7 MAX 410 MIN 14 CFSM .33 IN 4.43 WTR YR 1982 TOTAL 56911 MEAN 156 MAX 568 MIN 20 CFSM .54 IN 7.38 56 CROW WING RIVER BASIN 05247500 CROW WING RIVER NEAR PILLAGER, MN LOCATION.—Lat°46 I8'l8", long 94°22'38", in SW4NEJ sec.30, T.133 N., R.29 W., Cass County, Hydrologic Unit 07010106, at Sylvan dam powerplant of Minnesota Power & Light Co., 3.6 mi (5.8 km) above mouth and 4.9 mi (7-9 km) southeast of Pillager. PERIOD OP RECORD.—October 1968 to current year. Records for August 1924 to September 1968 available in files of the Minnesota district office. REMARKS.—Records poor. Discharge computed on basis of powerplant records. Records for Oct. 1, 1968 to Sept. 30, 1975, were adjusted for storage change in the Sylvan dam reservoir. Plow partly regulated by powerplants and Gull Lake (station 05246500). COOPERATION.—Records collected by Minnesota Power & Light Co. under general supervision of Geological Survey, in connection with a Federal Power Commission project. AVERAGE DISCHARGE. —14 years, 1,244 ftVs (35.23 m 3/s) . EXTREMES FOR PERIOD OF RECORD.—Maximum daily discharge, 16,600 ftVs (470 m3/s) Apr. 12, 13, 1969; minimum daily, 60 ftVs (1.70 m3 /s) Aug. 10, 11, 13, 14, 1976. EXTREMES OUTSIDE PERIOD OF RECORD.—Maximum daily discharge since 1924, 18,300 ft 3/s (518 m3/s) Apr. 14, 1965. EXTREMES FOR CURRENT YEAR.—Maximum daily discharge, 5,450 ft 3 /s (154 m 3 /s) Apr. 18; minimum daily, 271 ft 3 /s (7.67 m 3/s) June 6, due to regulation.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 559 1390 924 589 425 691 1570 1330 1290 1810 689 407 2 696 1390 865 424 453 756 2200 1320 1290 1720 902 366 3 731 1400 699 424 496 817 2900 1320 1300 1640 941 521 4 1020 1400 839 503 424 726 3020 2000 1300 1610 940 356 5 912 1400 662 577 372 818 4150 2570 1020 1110 746 681 6 935 1400 507 424 415 754 4580 1930 271 1040 616 466 7 934 1400 741 457 424 597 4840 1350 2530 1300 617 388 8 936 1400 752 424 380 423 4940 1830 1650 1400 725 618 9 935 990 807 492 425 283 4960 2290 1320 1540 725 414 10 933 1020 591 582 388 709 4950 2220 1340 1690 686 403 11 931 1020 445 565 415 719 4900 2230 1360 1870 650 372 12 932 1070 424 574 539 612 4860 2340 1430 1700 380 554 13 1110 1020 773 525 557 479 4920 2610 1660 1650 475 688 14 1410 1020 909 379 453 421 5020 2820 1560 1620 486 687 15 1390 1250 536 519 442 378 4950 3080 1310 1470 419 868 16 1380 1180 662 622 555 651 5220 3230 1480 1400 419 663 17 1330 1020 845 601 520 691 5380 4140 1760 1400 512 972 18 1160 851 549 614 417 623 5450 4940 1420 1410 543 944 19 1390 804 622 615 421 554 5380 4730 1070 1590 652 942 20 1390 1170 606 623 421 564 5200 4500 1170 1470 507 942 21 1410 707 583 622 414 621 4910 4480 1260 1400 686 902 22 1380 617 687 622 623 538 4610 4420 1140 1530 529 360 23 1390 842 573 622 689 431 3720 3890 1140 1460 403 722 24 1400 971 648 577 689 422 3110 3030 1230 1210 419 861 25 1400 994 657 580 592 573 2860 2330 1550 1010 365 491 26 1400 890 657 589 554 690 2740 1980 1780 811 464 601 27 1400 859 644 588 583 689 1390 1650 1850 821 394 414 28 1400 900 622 447 699 724 1340 1400 i860 938 419 702 29 1400 925 642 487 762 1330 1310 1880 919 481 806 30 1400 924 740 557 —— 944 1330 1310 1800 900 366 111 31 1400 —— 623 363 —— 1220 —— 1300 —— 887 550 —— TOTAL 36394 32224 20834 16587 13785 19880 116730 79880 43021 42326 17706 18888 MEAN 1174 1074 672 535 492 641 3891 2577 1434 1365 571 630 MAX 1410 1400 924 623 699 1220 5450 4940 2530 1870 941 972 MIN 559 617 424 363 372 283 1330 1300 271 811 365 356 GAL YR 1981 TOTAL 296585 MEAN 813 MAX 1420 MIN 283 WTR YR 1982 TOTAL 458255 MEAN 1255 MAX 5450 MIN 271 57 MISSISSIPPI RIVER MAIN STEM 05267000 MISSISSIPPI RIVER NEAR ROYALTON, MN LOCATION (REVISED).—Lat 45°51'4l", long 94°21'33", in lot 2, sec.20, T.39 N., R.32 W., Morrison County, Hydrologlc Unit 07010104, at plant of Minnesota Power & Light Co., 4 mi (6.4 km) northwest of Royalton, 4.5 mi (7.2 km) downstream from Swan River, and at mile 956 (1,538 km) upstream from Ohio River. DRAINAGE AREA.—11,600 mi 2 (30,000 km 2 ), approximately.' v WATER-DISCHARGE RECORDS PERIOD OP RECORD.—March 1924 to current year. REMARKS.—Records poor. Discharge computed on basis of powerplant records. Plow partly regulated by powerplants and Winnibigoshish, Leech, Pokegama, Sandy, and Gull Lakes and by Pine River Reservoir (see stations 05201000, 05206000, 05210500, 05218500, 05230500, 05246500). COOPERATION.—Records collected by Minnsota Power & Light Co. under general supervision of U.S. Geological Survey, in connection with a Federal Power Commission project. AVERAGE DISCHARGE.—58 years, 4,477 ft 3/s (126.8 m 3/s), 5-24 in/yr (133 mm/yr). EXTREMES FOR PERIOD OF RECORD.—Maximum daily discharge, 37,700 ft3 /s (1,070 m3 /s) Apr. 16, 1965; minimum daily, 254 ft3/s (7.19 m3/s) Nov. 25, 1936. EXTREMES FOR CURRENT YEAR.—Maximum daily discharge, 33,600 ft3 /s (952 m^/s) Apr. 19; minimum daily, 1,660 ft 3/s (47.0 rrP/s) Sept. 3.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEE MAR APR MAY JUN JUL AUG SEP 1 2840 9870 5180 3630 3550 3200 6290 20700 17000 6300 4030 2100 2 2580 9760 5180 3630 3720 3100 8380 19800 16200 5960 3590 2100 3 2950 9350 4850 3460 3760 3230 9730 18400 15600 5670 3390 1660 4 3710 9420 5200 3520 3530 3480 10100 19300 14200 5650 3630 1920 5 4110 9440 4060 3530 3600 3360 13700 18100 13400 4810 3260 i860 6 3780 9440 3230 3630 3480 3230 14100 17800 12100 5040 3230 2340 7 4940 8840 3780 3360 3430 3230 14700 15600 12900 5180 2980 1770 8 4740 8540 4780 3600 3430 3210 15500 15100 10800 5190 3200 1740 9 6100 7540 3880 3200 3320 3080 16300 15800 9830 5100 2790 2000 10 6250 7320 3340 3440 3330 3160 16600 16400 8530 6050 2990 1840 11 7000 7560 3300 3710 3400 3100 16300 16300 8180 6510 2740 1900 12 6680 7130 3620 3230 3230 3200 16100 15800 8790 7370 2580 2060 13 6650 7090 3550 3310 3230 2940 16500 16000 8510 6500 2440 2300 14 7090 7090 3000 3580 3270 3160 19200 16800 7770 7050 2900 2610 15 7200 7090 2900 3160 3200 3050 22300 16900 7000 7090 2580 2850 16 7560 7200 2420 3380 3330 2900 26500 18000 6740 7010 2490 4210 17 8720 7310 2860 3400 3210 3200 29600 18700 7440 6090 2760 3700 18 8890 7310 2640 3380 3180 3080 32800 22200 7870 5690 2580 3860 19 9720 6650 2910 3650 3260 3130 33600 27300 6690 5690 2380 3900 20 10300 6290 3030 3370 3210 3030 32400 27400 6590 5690 2530 3840 21 10600 5650 3210 3360 3330 2930 28600 26300 6320 4980 2310 3740 22 10500 5300 3230 3720 3100 3300 30000 26100 6160 4470 2500 3480 23 10600 5180 3180 3560 3320 3080 28400 25000 6180 4610 2380 3190 24 10700 5180 3310 3680 3300 3080 27400 24400 6820 4710 2130 3230 25 10800 5180 3580 3500 3230 3060 26100 22100 6970 4710 2130 3040 26 10700 5650 3630 3450 3700 3180 25800 21100 6890 4710 2080 3000 27 10200 5220 3630 3450 3220 3260 24900 20800 6970 4290 2260 2960 28 10200 5180 3590 3700 3230 3430 23800 19800 7010 4200 2130 2820 29 10300 5180 3730 3510 —— 3280 23100 18800 7000 4230 2050 3100 30 9840 5180 3630 3580 ___ 4030 21800 18500 6720 4330 2060 2930 31 9790 —— 3550 3650 —— 4630 —— 17600 —— 3980 2100 TOTAL 236040 213140 1U980 108330 94100 100330 630600 612900 273180 168860 83200 82050 MEAN 7614 7105 3612 3495 3361 3236 21020 19770 9106 5447 2684 2735 MAX 10800 9870 5200 3720 3760 4630 33600 27400 17000 7370 4030 4210 MEN 2580 5180 2420 3160 3100 2900 6290 15100 6160 3980 2050 1660 CFSM .66 .61 .31 .30 .29 .28 1.81 1.70 .79 .47 .23 .24 IN. .76 .68 .36 • 35 .30 .32 2.02 1.97 .88 .54 .27 .26 CAL YR 1981 TOTAL 1605020 MEAN 4397 MAX 10800 MIN 1060 CPSM .38 IN 5.15 WTR YR 1982 TOTAL 2714710 MEAN 7438 MAX 33600 MIN 1660 CFSM .64 IN 8.71 58 MISSISSIPPI RIVER MAIN STEM 05267000 MISSISSIPPI RIVER NEAR ROYALTON, MN—Continued (National stream-quality accounting network station) WATER-QUALITY RECORDS PERIOD OP RECORD.—Water years 1963-66, 1975 to current year. PERIOD OP DAILY RECORD.— j SPECIFIC CONDUCTANCE: November 1980 to September 1982. j WATER TEMPERATURES: November 1980 to September 1982. ! INSTRUMENTATION.—Water-quality minimonitor since November 1980. REMARKS.—Letter K indicates non-ideal colony count. Letter E indicates estimated value. EXTREMES FOR PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE: Maximum, 819 micfomhos July 26, 1981; minimum, 157 micromhos May 9, 1981. WATER TEMPERATURES: Maximum, 31.0°C July 18, 1981; minimum, 0.0°C several days during winter period. EXTREMES FOR CURRENT YEAR.— SPECIFIC CONDUCTANCE: Maximum, 347 micromhos Mar. 20; minimum, 157 micromhos May 9. WATER TEMPERATURES: Maximum, 30.5°C Aug. 5; minimum, 0.0°C several days during winter period. WATER QUALITY DATA, WATER'YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPE- BARO- SPE- CIFIC METRIC STREAM- CIFIC CON- PH PRES- PLOW, CON- DUCT- PH LAB TEMPER- SURE TUR- INSTAN- DUCT- ANCE (STAND- (STAND- ATURE, 'TEMPER- (MM BID- TIME TANEOUS ANCE LAB ARD ARD AIR ATURE OP ITY DATE (CFS) (UMHOS) (UMHOS) UNITS) UNITS) (DEG C) (DEG C) HG) (NTU) (00061) (00095) (90095) (00400) (00403) (00020) (00010) (00025) (00076) DEC 09 . . . 1530 3630 300 270 7.9 8.2 -4.0 .5 761 3.5 JAN 19. 1400 3830 331 328 7.4 7.7 -8.0 .0 757 2.4 MAR 16, 1500 2980 327 344 8.0 8.0 3.5 2.0 728 2.4 MAY 20, 1400 25600 194 184 8.2 7.7 17.0 16.0 742 6.5 JUL 15,. . . 1315 5900 305 296 8.1 8.1 23.0 23.0 731 4.1 SEP 08, 1230 1900 280 305 7.7 8.4 18.5 19.5 740 4.1 OXYGEN , COLI- STREP­ HARD­ DIS­ FORM, TOCOCCI NESS MAGNE­ SOLVED PECAL, PECAL, HARD­ NONCAR- CALCIUM SIUM, SODIUM, OXYGEN, (PER­ 0.7 KP AGAR NESS BONATE DIS— DIS­ DIS­ DIS­ CENT UM-MF (COLS. (MG/L (MG/L SOLYED SOLVED SOLVED SOLVED SATUR­ (COLS./ PER AS AS (MG/L (MG/L (MG/L DATE (MG/L) ATION) 100 ML) 100 ML) CAC03) CAC03) AS CA) AS MG) AS NA) (00300) (00301) (31625) (31673) (00900) (95902) (00915) (00925) (00930) DEC 09... 15.1 106 140 81 148 8.0 38 13 4.9 JAN 19... 8.1 56 — 38 164 4.0 41 15 6.5 MAR 16... 9.1 69 100 70 176 .00 44 16 6.1 MAY 20... 9.2 96 100 190 101 1.0 28 7.5 2.9 JUL 15... 7.8 95 15 E390 146 .00 31 13 5.1 SEP 08... 8.0 90 K5 200 155 5.0 39 14 5.9 SOLIDS, SOLIDS, SODIUM POTAS­ ALKA­ CHLO­ PLUO- SILICA, RESIDUE SUM OP AD­ SIUM, LINITY SULPATE RIDE, RIDE, DIS­ AT 180 CONSTI­ SORP­ DIS­ LAB DIS­ DIS­ DIS­ SOLVED DEG. C TUENTS , TION SOLVED (MG/L SOLVED SOLVED SOLVED (MG/L DIS­ DIS­ RATIO (MG/L AS (MG/L (MG/L (MG/L AS SOLVED SOLVED DATE AS K) CAC03) AS S04) AS CL) AS P) SI02) (MG/L) (MG/L) (0093D (00935) (90410) (00945) (00940) (00950) (00955) (70300) (70301) DEC 09... .2 1.6 140 6.0 3.7 .1 7.6 182 159 JAN 19... .2 1.7 160 6.9 4.3 .1 9.4 200 181 MAR 16... .2 2.1 180 8.5 4.2 .1 10 216 199 MAY 20... .1 1.4 100 5.0 2.1 .2 6.6 143 114 JUL 15... .2 .9 147 5.0 3.2 .1 8. '5 192 161 SEP 08... .2 1.2 150 10 4.7 .2 8.7 191 174 59 MISSESSIPPI RIVER MAIN STEM 05267000 MISSISSIPPI RIVER NEAR ROYALTON, MN—Continued WATER QUALITY DATA, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 NITRO­ NITRO­ NITRO­ PHOS­ SED. SOLIDS, GEN, GEN , GEN , AM- PHOS­ PHORUS, SUSP. DIS­ N02+N03 AMMONIA MONIA + PHOS­ PHORUS, ORTHO, SEDI­ SIEVE SOLVED DIS­ DIS­ ORGANIC PHORUS, DIS­ DIS­ MENT , DIAM. (TONS SOLVED SOLVED TOTAL TOTAL SOLVED SOLVED SUS­ % FINER PER (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L PENDED THAN DATE DAY) AS N) AS N) AS N) AS P) AS P) AS P) (MG/L) .062 MM (70302) (0063D (00608) (00625) (00665) (00666) (0067D (80154) (7033D DEC 09.. 1780 .19 .110 .74 .020 .010 <.010 — — JAN 19... 2070 .27 .090 .78 .030 .020 <.010 66 88 MAR 16... 1740 .30 .100 .62 .030 .020 .010 2 96 MAY 20.. 9880 <.10 .040 .85 .100 .050 .030 28 98 JUL 15... 3060 <.10 .110 .50 .070 .020 .010 24 100 SEP 08.. 980 <.10 .040 .50 .050 .030 .020 7 95

CHRO­ BARIUM, CADMIUM MIUM, CHRO­ COBALT , ARSENIC TOTAL BARIUM, TOTAL CADMIUM TOTAL MIUM, TOTAL ARSENIC DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ TOTAL SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS AS) AS AS) AS BA) AS BA) AS CD) AS CD) AS CR) AS CR) AS CO) (01002) (01000) (01007) (01005) (01027) (01025) (01034) (01030) (01037) JAN 19... 1400 1 1 100 50 1 <1 30 20 1 MAR 16... 1500 1 1 100 57 <1 <1 20 10 <1 MAY 20... 1400 1 1 100 42 <1 <1 20 10 2 SEP 08... 1230 2 2 <100 42 1 <:L 20 10 3

MANGA­ COPPER, IRON, LEAD, NESE, MANGA­ MERCURY COBALT, TOTAL COPPER, TOTAL IRON, TOTAL LEAD, TOTAL NESE, TOTAL DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS CO) AS CU) AS CU) AS PE) AS PE) AS PB) AS PB) AS MN) AS MN) AS HG) (01035) (01042) (01040) (01045) (01046) (0105D (01049) (01055) (01056) (71900) JAN 19... 1 5 2 330 64 1 <1 60 43 <.l MAR 16... <1 16 3 430 79 5 <1 60 46 .1 MAY 20... <1 12 4 1100 180 3 1 110 26 .4 SEP 08... <1 4 3 400 <3 4 1 70 3 <.l

NICKEL, SELE­ SILVER, ZINC, MERCURY TOTAL NICKEL, SELE­ NIUM, TOTAL SILVER, TOTAL ZINC, DIS­ RECOV­ DIS­ NIUM, DIS­ RECOV­ DIS­ RECOV­ DIS­ SOLVED ERABLE SOLVED TOTAL SOLVED ERABLE SOLVED ERABLE SOLVED (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS HG) AS NI) AS NI) AS SE) AS SE) AS AG) AS AG) AS ZN) AS ZN) (71890) (01067) (01065) (01147) (01145) (01077) (01075) (01092) (01090) JAN 19... <.l 6 1 1 1 <1 <1 40 <4 MAR 16... .1 3 <1 <1 <1 <1 <1 10 4 MAY 20... <.l 3 3 <1 <1 <1 <1 30 <3 SEP 08... <.l 4 3 <1 <1 <1 <1 20 <4 60 MISSISSIPPI RIVER MAIN STEM 05267000 MISSISSIPPI RIVER NEAR ROYALTON, MN—Continued WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 NAPH­ THA­ LENES , POLY- GHLOR- DI- DI- PCB, CHLOR. ALDRIN, DANE, ODD, DDE, DOT, AZINON, ELDRIN TIME TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (39516) (39250) (39330) (39350) (39360) (39365) (39370) (39570) (39380) MAR 16... 1500 .01 MAY 20... 1400 .01

HEPTA- METH- METHYL METHYL ENDO- HEPTA- CHLOR MALA- OXY- PARA- TRI- SULPAN, ENDRIN, ETHION, CHLOR, EPOXIDH: ^INDANE THION, CHLOR, THION, THION, TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (39388) (39390) (39398) (39410) (39420) (393^0) (39530) (39^80) (39600) (39790) MAR 16... MAY 20...

PARA- PER- TOX- TOTAL MIREX, THION, THANE APHENE, TRI- 2,4-D, 2, 4-DP 2,4,5-T SILVEX, TOTAL TOTAL TOTAL TOTAL THION TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UQ/L) (UG/L) (UG/L) (UG/L) (39755) (39540) (39034) (39400) (39786) (39730) (82183) (39740) (39760) MAR 16... <0 MAY 20...

CHLOR- DI- PCB, PCN, ALDRIN, DANE, ODD, DDE, DOT, ELDRIN , TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TIME TERIAL TERIAL TERIAL TERIAL TERIAL TERIAL TERIAL TERIAL DATE (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (39519) (3925D (39333) (3935D (39363) (39368) (39373) (39383) MAY 20... 1400 <1

ENDO- HEPTA- HEPTA- METH- TOXA- SULPAN, ENDRIN, CHLOR, CHLOR LINDANE OXY- MIREX, PER- PHENE, TOTAL TOTAL TOTAL EPOXIDE TOTAL CHLOR, TOTAL THANE TOTAL IN BOT- IN BOT- IN BOT- TOT. IN IN BOT- TOT. IN IN BOT­ IN IN BOT­ TOM MA- TOM MA- TOM MA- BOTTOM TOM MA- BOTTOM TOM MA­ BOTTOM TOM MA­ TERIAL FERIAL TERIAL MATL. TERIAL MATL. TERIAL MATERIL TERIAL DATE (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (39389) (39393) (39413) (39423) (39343) (39481) (39758) (81886) (39403) MAY 20... <1.00 61 MISSISSIPPI RIVER MAIN STEM

05267000 MISSISSIPPI RIVER NEAR ROYALTON, MN—Continued SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEO. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 304 302 303 230 228 229 278 275 277 330 328 329 2 304 302 303 234 229 231 281 278 279 330 329 330 3 302 295 298 235 233 234 281 279 280 331 324 328 4 296 294 295 235 231 232 282 279 280 328 324 327 5 297 293 295 233 231 232 285 281 284 328 323 325 6 297 294 295 237 232 234 285 278 282 324 322 323 7 296 294 295 236 233 234 289 283 287 323 321 322 8 296 294 295 241 235 238 292 283 288 322 320 322 9 296 293 295 243 239 241 289 281 284 321 318 319 10 295 288 292 242 239 240 292 290 291 320 318 319 11 288 281 284 244 242 243 296 291 293 320 319 320 12 280 274 276 245 242 244 301 296 299 320 318 319 13 273 264 268 251 244 248 302 297 300 321 319 320 14 264 252 259 252 250 251 298 29 4 295 321 318 320 15 253 248 251 252 251 252 298 296 297 321 314 317 16 258 250 254 262 253 257 303 299 301 322 321 322 17 259 255 257 263 258 260 318 302 311 322 316 320 18 258 250 253 261 258 260 327 319 323 319 316 318 19 255 251 254 263 259 261 329 320 327 321 318 320 20 256 247 253 266 258 263 324 318 322 317 315 316 21 247 243 245 258 252 255 328 322 325 315 312 314 22 244 235 239 267 256 263 327 321 323 314 281 312 23 235 228 232 267 259 263 327 325 326 315 313 314 24 229 225 227 261 255 259 326 323 325 313 312 312 25 226 221 223 267 260 263 328 325 326 313 311 312 26 224 220 222 270 264 267 330 328 329 313 311 312 27 222 220 221 274 268 271 331 329 330 312 310 311 28 222 218 220 275 270 273 331 328 329 312 310 311 29 225 220 222 273 267 271 329 328 329 312 311 312 30 231 225 229 275 271 274 329 327 328 313 311 312 31 232 228 230 329 326 327 313 . 310 311 MONTH 304 218 261 275 228 251 331 275 306 331 281 318

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 313 309 311 331 330 331 319 291 306 180 176 178 2 314 312 313 331 329 330 291 275 282 182 178 180 3 311 308 309 333 331 332 276 272 274 183 179 181 4 312 310 311 334 332 333 283 276 280 183 181 182 5 310 308 309 335 331 333 277 242 257 193 183 187 6 312 310 311 336 333 335 240 208 229 192 175 186 7 312 311 312 336 334 335 224 220 222 190 170 181 8 312 309 311 339 336 337 222 219 220 178 163 171 9 315 310 312 339 337 338 224 221 222 188 157 171 10 315 313 314 341 338 339 224 222 223 195 184 189 11 315 310 312 338 336 337 225 223 224 197 190 193 12 319 314 317 340 336 339 225 222 224 202 190 197 13 319 316 318 342 340 341 226 224 226 201 197 200 14 320 315 318 343 342 342 226 218 222 205 197 202 15 322 319 321 342 340 341 217 211 215 209 201 205 16 323 321 322 342 341 342 212 196 204 212 197 206 17 324 321 323 344 341 343 195 185 190 205 197 202 18 324 321 322 344 340 342 185 178 181 216 191 204 19 325 323 324 346 3^3 345 179 172 175 210 191 204 20 325 324 325 347 345 346 176 169 172 203 190 194 21 325 324 325 346 344 345 174 169 172 198 193 195 22 326 324 325 344 343 344 172 169 171 204 198 201 23 325 324 324 345 341 343 171 168 169 208 203 205 24 326 323 325 345 343 344 169 161 167 209 206 207 25 328 325 327 344 340 341 170 167 168 210 207 208 26 330 327 329 341 337 339 171 168 169 212 209 210 27 332 329 330 340 336 338 173 170 171 214 211 212 28 332 331 332 339 335 337 177 172 174 216 213 214 29 —— —— —— 339 333 336 179 175 177 217 214 216 30 —— —— —— 334 329 332 180 177 178 217 215 216 31 —— —— —— 331 316 326 219 216 218 MONTH 332 308 319 347 316 338 319 161 209 219 157 197 62 MISSISSIPPI RIVER MAIN STEM 05267000 MISSISSIPPI RIVER NEAR ROYALTON, MN—Continued SPECIFIC CONDUCTANCE MICROMHOS/CM AT 25 DE'J. 0), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY i*I AX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUWE JULY AUGUST SEPTEMBER

1 219 217 218 278 271 275 285 279 282 292 282 287 2 220 216 218 274 270 272 284 280 282 294 287 290 3 222 219 220 279 274 276 286 284 285 299 290 293 4 226 220 223 282 276 279 285 280 284 298 291 293 5 226 224 225 282 271 277 280 275 278 297 291 293 6 228 223 226 279 265 272 282 274 277 296 291 293 7 231 222 226 289 277 285 282 278 280 304 293 296 8 251 231 246 235 276 280 284 280 282 300 294 297 9 241 237 239 282 276 279 284 282 283 293 291 292 10 241 237 239 284 279 282 284 280 2^2 292 291 291 11 246 238 243 291 284 288 282 280 281 293 290 291 12 249 245 248 291 283 288 283 280 281 294 290 292 13 253 248 250 286 269 278 283 280 282 299 294 297 IH 257 251 254 283 263 278 282 279 281 299 296 298 15 261 258 259 286 273 282 287 280 282 296 292 294 16 261 257 259 286 281 284 282 277 280 292 288 290 17 259 255 257 281 276 279 280 276 279 293 290 291 18 270 255 262 278 273 275 285 276 281 295 291 293 19 271 268 270 276 274 275 287 284 285 296 293 295 20 269 264 267 281 275 279 289 283 286 296 292 295 21 264 263 264 283 274 278 302 286 291 293 287 291 22 264 262 263 288 282 286 294 288 292 288 280 284 23 266267' 263 265 287 284 285 299 292 294 281 272 277 24 264 265 287 284 286 297 291 294 274 272 273 25 268 262 264 290 285 288 294 290 292 273 267 270 26 267 265 266 291 282 288 304 291 298 268 266 267 27 274 266 270 284 279 281 294 289 291 267 266 266 28 278 272 275 283 280 281 291 288 289 266 263 265 29 279 276 277 285 282 284 297 287 290 268 263 265 30 277 272 276 287 284 286 302 285 294 269 267 268 31 —— —— —— 286 284 285 299 284 291 MONTH 279 216 251 291 263 281 304 274 285 304 263 286 TEMPERATURE, WATER (DEG. C) , WATlWATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY

1 12.0 11.0 11.5 6.0 5.0 5.5 0 .0 .0 0 .5 2 11.0 11.0 11.0 6.0 5.0 5.5 5 .0 .5 5 .5 3 11.0 10.0 10.5 6.5 5.5 5.5 5 .0 .0 0 .5 4 10.0 9.5 10.0 6.0 5.5 6.0 0 .0 .0 5 .5 5 10.0 9.5 9.5 6.5 6.0 6.5 0 .0 JO 5 .5 6 10.0 9.5 9.5 7.0 6.0 6.5 0 .0 .0 5 .5 7 10.5 10.0 10.0 6.0 5.5 6.0 .0 .0 .0 5 .5 8 10.0 10.0 10.0 6.0 5.5 6.0 0 .0 .0 5 .5 9 10.0 9.5 10.0 5.5 4.5 5.0 5 .0 .0 0 .0 10 10.0 9.5 9.5 4.5 4.0 4.0 5 .5 .5 0 .0

11 10.0 9.5 9.5 4.0 3.0 3.5 5 .0 .5 0 .5 12 10.5 10.0 10.0 4.0 3.5 3.5 5 .0 .0 0 .5 13 11.0 10.5 10.5 4.5 3.5 4.0 5 .0 .5 0 .5 14 11.5 10.5 11.0 5.0 4.5 4.5 5 .5 .5 5 .5 15 11.5 10.5 11.0 5.0 5.0 5.0 5 .5 .5 0 .5

16 11.0 11.0 11.0 5.0 4.5 5.0 5 .0 .5 0 .5 17 11.0 11.0 11.0 4.5 4.5 4.5 5 .0 .5 5 .5 18 11.0 9.5 10.5 4.5 4.0 4.5 5 .0 .5 5 .5 19 9.5 8.5 8.5 4.0 3.5 4.0 5 .0 .5 5 .5 20 9.0 8.0 8.5 3.5 2.0 3.0 5 .0 .5 5 .5 21 8.5 7.5 8.0 2.0 1.5 1.5 5 .0 .5 5 .5 22 7.5 6.0 6.5 1.5 1.0 1.5 5 .5 .5 5 .5 23 6.0 4.5 5.0 1.0 .0 .5 5 .5 .5 5 .5 24 4.5 3.5 4.0 .5 .0 .5 5 .5 .5 5 .5 25 3.5 3.0 3.5 1.0 .5 1.0 5 .5 .5 5 .5 26 3.5 3.0 3.5 1.0 1.0 1.0 5 .0 .5 5 .5 27 3.5 3.0 3.5 1.0 .5 .5 5 .0 .5 5 .5 28 4.0 3.5 4.0 .5 .0 .5 5 .5 .5 5 .5 29 4.5 4.0 4.5 .5 .0 .5 5 .0 .5 5 .5 30 5.5 4.5 5.0 .5 .0 .5 5 .5 .5 5 .5 31 5.5 5.0 5.5 5 .5 .5 5 .5 MONTH 12.0 3.0 7.0 .0 3.5 63 MISSISSIPPI RIVER MAIN STEM 05267000 MISSISSIPPI RIVER NEAR ROYALTON, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY

1 5 , .5 .5 14.0 13.5 14.0 2 5 .0 .5 14.5 . 14.0 14.0 3 ,5 .0 .5 15.0 14.5 15.0 4 ,5 .0 .5 16.5 15.0 16.0 5 5 .0 .0 16.5 15.5 16.0 6 5 .0 .5 15.5 15.0 15.0 7 5 .0 .5 15.0 14.5 15.0 8 5 .0 .5 17.0 14.5 15.5 9 5 .5 .5 15-5 14.5 15.0 10 5 .0 .5 15.0 14.5 15.0 11 5 .0 .5 15.5 14.5 15.5 12 5 .5 .5 15.5 14.5 15.0 13 5 .0 .5 15.5 14.0 14.5 14 5 .5 .5 15.0 14.5 15.0 15 5 .0 .5 15.5 15.0 15.5 16 5 .0 .5 16.5 15.5 16.0 17 5 .5 .5 5.0 2.5 4.0 17.0 16.5 17.0 18 5 .5 .5 5.0 4.5 4.5 17.0 16.5 17.0 19 5 .5 .5 5.5 3.5 4.5 18.0 17.0 17.5 20 5 .5 .5 6.0 5.0 5.5 18.5 16.0 16.5 21 5 .5 .5 6.5 5.5 6.0 17.0 15.5 16.0 22 5 .5 .5 7.5 6.0 6.5 16.5 15.5 16.0 23 5 .5 .5 8.5 7.0 7.5 17.0 16.0 16.5 24 5 .5 .5 10 ,5 8.5 9.0 17.0 16.5 17.0 25 5 .5 .5 11.5 10.0 10.5 17.5 16.5 17.0 26 5 .5 .5 12.0 11.0 11.5 17.5 17.0 17.5 27 5 .5 .5 13.0 11.5 12.0 18.5 17.5 18.0 28 5 .5 .5 13.0 12.0 12.5 19.5 19.0 19.0 29 13.0 12.0 12.5 20.0 20.0 20.0 30 13.5 12.5 13.0 20.5 19.5 20.0 31 20.0 19.0 19.5 MONTH .5 .0 .5 13.5 .0 4.5 20.5 13.5 16.5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER

1 19.0 16.0 18.5 22.5 21.5 22.0 27.5 24.5 25.5 21.5 19.5 20.5 2 19.0 16.5 18.5 22.5 22.0 22.5 26.0 24.5 25.0 21.5 20.0 21.0 3 20.0 18.0 18.5 24.0 22.5 23.0 27.5 25.0 26.0 21.0 19.5 20.0 4 19.0 18.0 18.5 25.5 23.0 24.0 28.0 26.0 26.5 20.0 20.0 20.0 5 19.0 18.0 18.5 26.0 24.5 25.0 30.5 27.0 28.5 20.5 20.0 20.0

6 18.0 17.5 18.0 26.0 25.5 25.5 30.0 27.5 28.0 20.5 20.0 20.0 7 17.5 17.0 17.0 26.0 25.0 25.5 29.5 27.5 28.0 20.0 19.5 19.5 8 18.0 17.0 17.0 25.0 23.5 24.5 28.0 26.5 27.5 19.5 19-0 19.5 9 18.0 17.0 17.5 25.0 23.5 24.0 26.5 25.0 25.5 19.5 19.0 19.0 10 17.5 17.0 17.0 23.5 23.0 23.0 25.0 24.0 24.5 20.0 19.0 19.5

11 19.0 16.5 17.5 24.0 22.5 23.0 24.0 21.5 23.0 20.5 19.0 19.5 12 19.0 17.5 18.0 25.0 22.0 23.5 22.5 21.5 22.0 20.5 20.0 20.0 13 20.5 18.0 19.0 24.5 23.5 24.0 22.5 22.0 22.0 20.0 19.5 20.0 14 19.5 18.5 19.5 25.0 23.5 24.0 22.0 22.0 22.0 19.5 19.0 19.0 15 19.5 18.5 19.0 24.5 24.0 24.5 23.0 22.0 22.0 19.0 18.0 18.5

16 20.0 19.0 19.5 24.5 24.0 24.5 24.5 22.0 23.0 17.5 15-5 16.5 17 20.0 19.5 19.5 25.0 24.0 24.5 27.5 23-0 24.5 16.5 15.0 16.0 18 20.5 19.0 19.5 26.0 24.0 25.0 26.0 23.0 24.0 15.5 14.5 15.0 19 19.5 19.0 19.0 25.0 24.5 24.5 26.5 24.0 25.0 15.5 15.0 15.0 20 19.0 18.5 18.5 25.0 24.0 24.5 26.0 25.0 25.0 15.0 15.0 15.0

21 19.0 18.0 18.5 29.5 25.0 26.5 25.0 24.5 25.0 16.5 14.5 15.5 22 21.0 18.5 19.5 28.0 26.0 27.0 25.0 24.5 24.5 15.5 13.5 14.5 23 20.5 19.0 20.0 27.0 26.0 26.5 25.5 24.0 24.5 14.5 14.0 14.5 24 21.0 20.5 20.5 27.0 26.0 26.5 24.5 24.0 24.0 14.5 14.0 14.5 25 22.0 20.5 21.0 26.5 26.0 26.0 23.5 23.0 23.0 14.5 14.0 14.0 26 21.5 20.0 20.5 28.0 25.5 26.0 23.0 22.0 22.5 14.5 14.0 14.0 27 24.0 21.0 22.0 27.5 25.0 26.0 23.0 22.0 22.0 14.0 14.0 14.0 28 23.0 21.5 22.0 29.0 25.0 26.0 22.0 20.5 21.0 14.0 14.0 14.0 29 23.0 22.0 22.0 26.5 25.5 26.0 21.0 20.0 20.5 15.0 14.0 14.5 30 23.5 20.5 22.0 26.5 25.0 25.5 20.5 20.0 20.5 15.0 14.5 15.0 31 25-5 24.5 25.0 20.5 19.0 19.5 MONTH 24.0 16.0 19.0 29.5 21.5 25.0 30.5 19.0 24.0 21.5 13.5 17.5 ELK RIVER BASIN

05274750 ST. FRANCIS RIVER ABOVE ZIMMERMAN, MN LOCATION.—Lat 45°28 I 17", long 93°39'50", in NW4NE4 sec.2, T.34 N., R.27 W., Sherburne County, Hydrologic Unit 07010203, in Sherburne National Wildlife Refuge, on right bank 9 mi (14.5 km) southeast of Santiago, 3.5 mi (5-6 km) west and 2 mi (3.2 km) north of Zimmerman. PERIOD OF RECORD.—May 1980 to December 1981, April to September 1982. GAGE.—Water-stage recorder. REMARKS.--Records fair. EXTREMES FOR CURRENT YEAR.—Maximum discharge observed, 1,080 ft3 /s (30.6 m3/s) Apr. 6, gage height, 10.06 ft (3.066 m); minimum discharge, 5.8 ft3/ s (0.16 m3/s) Sept. 26; minimum gage height, 3.38 ft (1.030 m) Nov. 12.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 15 16 42 __ 70 167 27 22 17 2 15 15 40 —— 61 138 26 20 17 3 15 15 38 —— 54 , 111 26 20 14 4 19 15 —— —— 46 91 25 20 12 5 20 18 —— — 66 75 21 19 13 6 21 15 _ _ 973 106 65 28 19 13 7 22 14 —— 611 157 62 34 18 12 8 22 18 —— 543 142 58 36 17 11 9 23 14 —— 705 107 53 48 15 10 10 23 15 —— 636 80 50 54 14 16 11 23 14 _ _ 420 66 46 55 13 16 12 23 13 —— 284 60 44 55 13 18 13 22 14 —— 203 73 37 54 12 18 14 22 17 —— 154 86 33 57 12 17 15 21 18 —— 112 93 33 63 12 16 16 18 22 __ 93 102 28 65 12 13 17 22 65 __ 76 105 28 65 12 13 18 27 116 —— 59 109 26 65 11 12 19 19 150 —— 51 111 24 64 11 12 20 20 163 —— 46 145 26 64 11 12 21 18 163 _ _ 57 226 26 55 9.9 11 22 17 169 —— 144 286 25 44 11 9.0 23 15 169 —— 147 308 24 36 11 9.3 24 15 166 —— 115 310 29 30 11 10 25 16 120 —— 95 298 31 27 10 8.8 26 15 71 _ _ 77 238 28 26 11 6.7 27 16 61 —— 68 218 28 26 10 6.9 28 15 52 —— 76 214 29 24 10 8.3 29 14 47 —— 80 206 31 23 12 15 30 13 43 —— 79 195 29 23 14 19 31 17 —— —— —— 185 —— 21 13 — - TOTAL 583 1808 __ __ 4523 1475 1267 425.9 386.0 MEAN 18.8 60.3 —— —— 146 49.2 40.9 13.7 12.9 MAX 27 169 —— —— 310 167 65 22 19 MIN 13 13 —— —— 46 24 21 9.9 6.7 CFSM .13 .40 —— —— .97 • 33 .27 .09 .09 IN. .14 .45 —— —— 1.11 .36 .31 .10 .10 AC- FT 1160 3590 —— —— 8970 2930 2510 845 766 65 ELK RIVER BASIN 05275000 ELK RIVER NEAR BIG LAKE, MN LOCATION.—Lat 45°20'02", long 93°40'00", In NEJSWJ sec.23, T.33 N., R.27 W., Sherburne County, Hydrologic Unit 07010203, on right bank at upstream side of highway bridge, 4 ml (6 km) east of Big Lake and 4 ml (6 km) downstream from St. Francis River. DRAINAGE AREA.—6l5 ml 2 (1,593 km 2 ). WATER-DISCHARGE RECORDS PERIOD OF RECORD.—April 1911 to September 1917, April to September 1931, April to November 1932, March to November 1933, March 1934 to current year. REVISED RECORDS.--WSP 895: 1939- WSP 1308: 1912(M), 1915-17(M). GAGE.—Water-stage recorder. Datum of gage is 899.60 ft (274.198 m) National Geodetic Vertical Datum of 1929. April 1911 to Sept. 30, 1917, Apr. 1, 1931, to July 26, 1934, nonrecording gage at same site and datum. REMARKS.—Records good except those for winter periods, which are fair. AVERAGE DISCHARGE.—54 years (water years 1912-17, 1935-82), 256 ft3 /s (7-250 m^/s), 5.65 in/yr (144 mm/yr). EXTREMES FOR PERIOD OF RECORD,—Maximum discharge, 7,360 ft3 /s (208 m3/s) Apr. 16, 1965, gage height, 10.86 ft (3.310 m); minimum, 3.6 ft 3 /s (0.102 m3 /s) July 31, 1934. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 2,380 ft3 /s (67.4 m3 /s) Apr. 7, gage height, 6.33 ft (1.929 m); minimum, 53 ft3 /s (1.50 m3 /s) Aug. 22, gage height, 0.68 ft (0.207 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 107 178 180 92 85 104 656 321 435 176 114 174 2 106 172 177 92 85 106 901 304 400 161 107 184 3 106 166 176 91 85 108 1240 286 373 151 100 153 4 135 163 183 90 85 110 1380 278 343 138 96 131 5 150 157 154 90 85 112 1620 287 306 125 92 128 6 154 153 152 89 85 113 1730 285 274 157 87 133 7 156 150 150 88 86 116 2320 295 257 223 82 125 8 158 146 148 88 86 118 2070 315 239 251 79 118 9 154 140 147 88 87 120 1780 356 226 266 76 114 10 154 136 146 87 87 121 1660 384 212 279 72 172 11 153 131 144 87 87 123 1480 366 201 280 66 210 12 146 129 142 87 88 127 1250 336 188 264 61 199 13 142 128 140 86 88 130 1090 341 178 247 61 220 14 192 126 137 86 88 131 961 357 182 235 64 229 15 229 124 134 86 88 131 867 371 199 221 65 239 16 222 127 131 85 89 132 837 414 186 213 64 267 17 248 126 128 85 90 134 814 456 168 207 65 302 18 298 137 125 85 90 141 750 533 157 199 69 336 19 325 172 122 85 91 152 691 579 149 189 65 341 20 315 190 118 85 92 167 648 608 156 180 59 320 21 294 190 114 85 93 180 607 631 153 171 56 290 22 290 190 110 85 94 195 558 659 144 163 56 256 23 281 190 106 85 95 210 537 679 138 152 60 224 24 266 190 103 85 96 230 536 681 148 135 66 200 25 247 190 100 85 97 245 520 682 170 126 70 184 26 232 190 99 85 98 265 479 686 167 137 72 172 27 219 190 98 85 100 290 424 676 176 149 84 159 28 209 190 96 85 102 320 375 631 193 138 90 149 29 200 190 95 85 —— 350 345 571 205 141 101 157 30 192 182 94 85 —— 381 331 544 196 141 118 164 31 184 —— 93 85 —— 540 —— 486 —— 125 108 —— TOTAL 6264 4843 4042 2687 2522 5702 29457 14398 6519 5740 2425 6050 MEAN 202 161 130 86.7 90.1 184 982 464 217 185 78.2 202 MAX 325 190 183 92 102 540 2320 686 435 280 118 341 MIN 106 124 93 85 85 104 331 278 138 125 56 114 CFSM .33 .26 .21 .14 .15 .30 1.60 .75 .35 .30 .13 .33 IN. .38 .29 .24 .16 .15 .34 1.78 .87 .39 .35 .15 .37 CAL YR 1981 TOTAL 64946 MEAN 178 MAX 682 MIN 76 CFSM .29 IN 3.93 WTR YR 1982 TOTAL 90649 MEAN 248 MAX 2320 MIN 56 CFSM .40 IN 5.48 66 CROW RIVER BASIN 05278000 MIDDLE PORK CROW RIVER NEAR SPICER, "1M LOCATION.—Lat 45°15'45", long 94°43'10", in MEJ sec.27, T.121 N., R.33 W., Kandiyohi County, Hydrologlc Unit 07010204, on right bank 75 ft (23 m) upstream from highway bridge, 1.5 mi (2.4 km) downstream from Lake Calhoun, 3 mi (4.8 km) downstream from Green Lake, and 6.8 mi (10.9 km) northeast of Spicer. DRAINAGE AREA.—179 mi 2 (464 km 2 ), approximately. PERIOD OF RECORD.—"larch 1949 to current year. REVISED RECORDS.--WSP 1508: 1949(M), 1950. GAGE.—Water-stage recorder and concrete and steel sharp-crested V-notch weir. Datum of gage is 1,147.93 ft (349.889 m) National Geodetic Vertical Datum of 1929 (Kandiyohi County Highway Department bench mark). Prior to July 20, 1950, nonrecording gage at bridge 75 ft (23 m) downstream at same datum. REMARKS.--Records good except those for winter period, which are fair. Flow affected by natural storage and some regulation from lakes above station. AVERAGE DISCHARGE. — 33 years, 53.2 ftVs (1.507 nVs), 4.04 in/yr (103 Tim/yr); median of yearly mean discharges, 39-2 ft3/s (1.11 m3/s), 2.97 in/yr (75 mm/yr). EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 408 ft 3 /s (11.6 mVs) June 29, 1953, gage height, 6.52 ft (1.987 m); maximum gage height, 6.67 ft (2.033 11) June 25, 1957; no flow Mar. 15-24, 1949, Feb. 26 to Mar. 26, I960, Dec. 8, 1963, Feb. 10-21, 1965, Feb. 19-28, 1968, Jan. 11-30, 1975. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 356 ft3/ s (10.1 m3/s) Apr. 24, gage height, 5.35 ft (1.631 m); minimum discharge, 35 ft3/s (0.99 m3/s) Oct. 3, gage height, 2.77 ft (0.844 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WVTER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN WEB MAR APR MAY JUN AQG SEP

1 41 155 114 77 53 74 164 262 146 65 72 49 2 37 153 114 76 53 73 173 252 139 63 69 47 3 40 150 111 76 52 72 216 240 131 62 68 43 4 60 149 111 75 52 71 193 229 125 60 67 41 5 55 146 109 74 52 70 217 224 119 58 65 43 6 53 137 108 73 52 70 213 213 117 78 64 41 7 47 129 109 72 52 70 207 204 122 96 62 39 8 44 124 110 72 52 70 223 194 118 89 59 39 9 43 112 107 70 52 70 237 188 113 89 55 38 10 44 108 104 68 52 70 242 180 109 87 52 37 11 44 104 104 67 52 70 242 177 103 83 50 36 12 42 101 104 67 52 70 247 168 99 73 47 53 13 59 98 105 66 52 70 251 163 92 78 46 53 14 85 98 102 65 52 70 258 167 110 81 45 48 15 88 97 98 64 53 71 259 163 129 83 44 49 16 98 96 96 62 54 72 259 160 114 84 43 48 17 113 94 94 61 56 73 245 166 107 83 48 47 18 117 94 92 61 52 7*» 227 197 108 81 48 45 19 99 94 90 60 53 75 210 197 104 78 47 45 20 89 91 88 60 55 76 223 186 100 75 44 43 21 80 89 85 60 55 78 240 173 93 79 41 42 22 75 89 85 59 57 80 306 166 84 84 41 41 23 70 91 84 59 57 83 346 166 78 79 40 42 24 68 108 83 58 58 86 355 166 79 76 41 43 25 69 118 82 57 58 90 346 163 77 76 40 43 26 68 124 82 57 73 96 313 164 71 81 40 43 27 95 125 81 56 74 99 295 163 69 81 41 42 28 122 121 81 55 74 105 294 159 67 78 38 40 29 141 117 79 55 —— 111 271 158 70 77 44 44 30 149 114 78 54 —— 142 270 157 68 75 45 45 31 154 —— 77 54 —— 156 —— 152 —— 73 42 —— TOTAL 2389 3426 2967 1990 1559 2557 7542 5717 3061 2410 1548 1309 MEAN 77.1 114 95.7 64.2 55.7 82.5 251 184 102 77.7 49.9 43.6 MAX 154 155 114 77 74 156 355 262 146 96 72 53 MIN 37 89 77 54 52 70 164 152 67 58 38 36 CFSM .43 .64 .54 • 36 .31 .46 1.40 1.03 .57 .43 .28 .24 IN. .50 .71 .62 .41 .32 .53 1.57 1.19 .64 • 50 .32 .27 CAL YR 1981 TOTAL 23109 MEAN 63.3 MAX 250 MIN 16 CFSM .35 IN 4.80 WTR YR 1982 TOTAL 36475 MEAN 99-9 MAX 355 MIN 36 CFSM .56 IN 7.58 67 CROW RIVER BASIN 05280000 CROW/ RIVER AT ROCKFORD, MN LOCATION.—Lat 45°05'12", long 93°44'02", in sec.29, T.119 N., R-24 W., Hennepin County, Hydrologic Unit 07010204, on right bank at Rockford, 150 ft (46 m) downstream from bridge on State Highway 55 and 1 mi (1.6 km) downstream from confluence of North and South Porks. DRAINAGE AREA.—2,520 mi 2 (6,530 km 2 ), approximately. WATER-DISCHARGE RECORDS PERIOD OP RECORD.—April to July 1906 (published as "near Dayton"), June 1909 to September 1917, April to November 1929, March 1930 to September 1931, April to November 1932, March to November 1933, March 1934 to current year. Monthly discharge only for some periods, published in WSP 1308. REVISED RECORDS.—WSP 1115: 1932. WSP 1508: 1933. WDR MN-77-2: 1972 (M)(m). GAGE.—Water-stage recorder. Datum of gage is 893.08 ft (272.211 m) National Geodetic Vertical Datum of 1929. Apr. 13 to July 21, 1906, nonrecording gage at Berning Mill 14 mi (22.5 km) downstream at different datum. June 4, 1909, to Sept. 30, 1917, nonrecording gage at site 600 ft (183 m) downstream at different datum. Apr. 23, 1929, to Aug. 21, 1934, nonrecording gage at site 600 ft (183 m) downstream at present datum. REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.—57 years (water years 1910-17, 1931, 1935-82), 643 ft 3 /s (18.21 m 3 /s), 3-47 in/yr (88 mm/yr); median of yearly mean discharges, 511 ft 3 /s (14.5 m3 /s), 2.75 in/yr (70 mm/yr). EXTREMES POR PERIOD OP RECORD.—Maximum discharge, 22,400 ft3 /s (634 m3/s) Apr. 16, 1965, s;age height, 19.27 ft (5.874 m) from floodinark; minimum, 1.8 ft 3 /s (0.051 m3 /s) Nov. 15, 1936, gage height, 1.05 ft (0.320 m), caused by ice jam upstream. EXTREMES POR CURRENT YEAR.—Maximum discharge, 7,330 ft 3 /s (208 m3/s) Apr. 5, gage height, 11.43 ft (3.484 m); maximum gage height, 11.91 ft (3.630 m) Mar. 29 (backwater from ice); minimum daily discharge, 179 ft 3 /s (5.07 m3/s) Jan. 28-Peb. 15; minimum gage height, 2.31 ft (0.704 m) Aug. 22-24.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 340 978 616 280 179 230 6800 3240 2620 855 523 265 2 321 962 592 270 179 230 7050 3050 2480 804 489 297 3 323 948 581 262 179 230 7210 2870 2340 756 455 315 4 348 936 580 256 179 230 7210 2740 2210 702 423 311 5 403 922 571 250 179 235 7290 2680 2090 651 398 311 6 469 895 560 242 179 250 7240 2580 1980 633 374 297 7 547 881 555 237 179 260 7000 2460 1880 663 354 286 8 599 867 545 230 179 260 6770 2340 1780 702 335 278 9 609 839 535 224 179 265 6630 2270 1720 795 322 270 10 614 812 525 220 179 260 6480 2210 1660 928 307 351 11 612 785 515 216 179 250 6230 2140 1640 992 290 574 12 600 759 505 211 179 238 5940 2110 1650 1060 273 747 13 592 725 485 208 179 238 5640 2110 1650 1100 257 775 14 615 699 465 203 179 250 5370 2120 1640 1110 240 790 15 672 680 430 199 179 270 5110 2150 1570 1090 230 836 16 767 654 375 197 181 300 4930 2210 1460 1040 223 857 17 877 636 340 194 190 350 4990 2270 1390 980 216 854 18 970 623 265 192 210 450 5100 2350 1350 921 208 830 19 1050 623 310 190 230 600 5220 2430 1340 862 201 786 20 1120 629 365 188 240 850 5410 2510 1350 791 199 729 21 1170 593 375 186 255 1100 5540 2520 1330 742 197 669 22 1200 530 365 184 248 1300 5600 2530 1280 695 189 613 23 1210 558 355 182 245 1500 5490 2630 1210 660 184 562 24 1200 648 345 181 240 1800 5220 2820 1170 670 206 520 25 1180 654 335 181 240 2080 4890 3040 1130 673 213 484 26 1150 644 325 180 240 2760 4570 3190 1080 675 218 456 27 1110 635 320 180 238 3670 4250 3270 1040 652 227 429 28 1080 644 310 179 238 4790 3940 3230 1010 625 216 412 29 1050 648 297 179 —— 6240 3680 3110 967 611 222 403 30 1020 642 290 179 —— 6480 3440 2940 918 587 229 408 31 997 —— 285 179 — - 6650 — - 2780 — - 558 231 -— TOTAL 24815 22049 13317 6459 5680 44616 170240 80900 46935 24583 8649 15715 MEAN 800 735 430 208 203 1439 5675 2610 1565 793 279 524 MAX 1210 978 616 280 255 6650 7290 3270 2620 1110 523 857 MIN 321 530 265 179 179 230 3440 2110 918 558 184 265 CPSM .32 .29 .17 .08 .08 .57 2.25 1.04 .62 .32 .11 .21 IN. .37 .33 .20 .10 .08 .66 2.51 1.19 .69 .36 .13 .23 GAL YR 1981 TOTAL 204814 MEAN 561 MAX 1900 MIN 70 CPSM .22 IN 3.02 WTR YR 1982 TOTAL 463958 MEAN 1271 MAX 7290 MIN 179 CPSM .50 IN 6.85 RUM RIV5R BASIN 05284000 MILfjE LACS LAKE AT GARRISON, MN LOCATION.—Lat 46°l8'05", long 93°49'05", in SWJSEJ sec.l?, T.44 N., R.28 W., Crow Wing County, Hydrologic Unit 07010207, at pumphouse of Minnesota Division of Game and Pish, 0.2 mi (0.3 km) southwest of Borden Lake outlet and 0.8 mi (1.3 km) northeast of Garrison. PERIOD OP RECORD.—June 1931 to current year. Monthend records for the period October 1939 to September 1953 published in WSP 1278 (fragmentary 1940-41). Prior to October 1939, published as "at Wealthwood." GAGE.—Water-stage recorder. Datum of gage is 1,240.'10 ft (378.074 m) National Geodetic Vortical Datum of 1929. Gage readings have been reduced to elevations NGVD. Prior to Oct. 1, 1941, nonrecording sage at Wealthwood, 8.3 mi (13«4 km) northeast of present site, at various daturis; Rage readings have been reduced to elevations, adjustment of 1912. October 1, 1941, to Sept. 30, 1958, water-stage recorder at datum 1,240.50 ft (378.104 m) adjustment of 1912. To convert these records to National Geodetic Vertical Datum of 1929, subtract 0.10 ft (0.030 m). REMARKS.—Water level affected by fixed-crest spillway constructed in 1953 at outlet of 0<$echie Lake, 2.7 mi (4.3 km) downstream from outlet of Mille Lacs Lake, with crest at elevation 1,250.50 ft (381.152 rn). Water level subject to fluctuation caused by change in direction and velocity of wind and by seiches. EXTREMES FOR PERIOD OP RECORD.--Maximum elevation, 1,253.87 ft (382.180 m) Aug. 14, 1972, affected by wind action and seiche action; maximum daily, 1,253-43 ft (382.045 m) Aug. 22, 1972; minimum observed, 1,245-74 ft (379-702 m) Oct. 16-19, 1936. EXTREMES POR CURRENT YEAR.—Maximum elevation, 1,252.26 ft (381.689 m) June 6, affected by wind action and seiche action; maximum daily, 1,252.12 ft (381.646 m) May 20; minimum, 1,250.57 ft (381.174 m) Oct. 1, affected by wind action and seiche action; minimum daily, 1,250.86 ft (381.262 m) Oct. 1. MONTHEND ELEVATION, IN PEET NGVD, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 Oct. 31 ...... 1251.19 Peb. 28 ...... 1251.20 June 30 ...... 1251.33 Nov. 30 ...... 1251-13 Mar. 31 ...... 1251.33 July 31 ...... 1251.59 Dec. 31 ...... 1251.12 Apr. 30 ...... 1251.79 Aug. 31 ...... 1251.28 Jan. 6 ...... 1251.14 May 31 ...... 1251.97 Sept.30 ...... 1251.35 NOTE.—Elevations other than those shown are available. 69 RUM RIVER BASIN 05286000 RUM RIVER NEAR ST. FRANCIS, MN LOCATION—Lat 45°19'40", long 93°22'20", in SR4 sec.19, T.33 N., R.24 W., Anoka County, Hydrologic Unit 07010207, on left bank at upstream side of highway bridge, 4 mi (6.4 km) south of St. Francis and 15.8 mi (25.4 km) upstream from mouth. DRAINAGE AREA.—1,360 mi 2 (3,520 km 2 ), approximately. PERIOD OF RECORD.— May to Movernber 1929, March 1930 to September 1931, April to November 1932, March 1933 to current year. REVISED RECORDS.—WSP 1308: 1930(M), 1932(M). GAGE.—Water-stage recorder. Datum of gage is 860.74 ft (262.354 m) National Geodetic Vertical Datum of 1929 (levels by Anoka County Highway Department). Prior to Nov. 9, 1933, nonrecording gage at site 50 ft (15 n) downstream at same datum. REMARKS.—Records good except those for winter period, which are fair. Occasional regulation by Ogechle (also controls Mille Lacs Lake) and Onamia Lakes. AVERAGE DISCHARGE.—50 years (water years 1931, 1934-82), 594 ft 3 /s (16.82 m 3/s), 5.93 in/yr (151 mra/yr). EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 10,100 ft3/ s (286 m^/s) Apr. 20, 1965, Apr. 13, 1969; maximum gage height, 11.63 ft (3.545 m) Apr. 13, 1969; minimum discharge, 29 ft 3 /s (0.82 nP/s) Aug. 18, 1934, gage height, 1.91 ft (0.582 m). EXTREMES FOR CURRENT YEAR.—Maximum discharge, 4,610 ft 3 /s (131 m 3 /s) Apr. 9, gage height, 7.44 ft (2.268 m); minimum, 151 ft3/s (4.28 rrp/s) Mar. 20, gage height, 2.31 ft (0.704 m).

DISCHARGE, IN CUBIC FEET P5R SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT MOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 227 712 368 220 190 204 1490 1250 948 487 361 320 2 228 682 368 218 190 208 1900 1120 905 462 347 313 3 227 650 379 216 190 211 2230 1020 859 441 340 316 4 265 621 358 214 190 212 2490 944 805 416 329 304 5 319 597 294 212 190 215 2920 918 756 389 315 314 6 374 574 313 210 190 217 3350 884 720 397 302 311 7 418 572 315 208 190 220 4000 850 685 430 294 304 8 465 603 320 206 190 222 4460 843 661 463 321 302 9 474 602 310 205 190 228 4570 843 634 586 341 305 10 463 580 287 204 190 230 4390 842 603 791 327 367 11 454 555 300 203 190 235 4060 845 584 909 307 429 12 426 531 275 202 191 240 3700 835 575 983 291 496 13 412 507 290 201 191 245 3350 850 559 966 281 532 14 463 492 300 200 192 250 3050 893 553 869 270 514 15 524 472 310 199 193 255 2790 936 524 753 262 529 16 596 453 325 199 193 261 2620 1000 480 659 259 583 17 792 438 333 198 194 277 2550 1110 450 594 265 654 18 1010 428 337 198 194 310 2610 1250 433 545 264 679 19 1120 423 292 197 195 297 2840 1370 425 513 267 678 20 1190 413 280 196 196 218 3160 1470 427 483 257 661 21 1230 406 265 195 197 297 3460 1520 429 466 246 624 22 1290 422 260 194 198 350 3580 1600 434 447 246 579 23 1330 373 250 193 198 350 3480 1710 432 426 236 534 24 1310 347 245 192 199 352 3230 1790 445 415 236 496 25 1240 379 240 192 200 416 2890 1760 484 418 232 457 26 1130 379 236 192 200 444 2530 1520 496 435 241 426 27 1030 384 232 192 201 475 2150 1230 520 429 265 405 28 925 379 230 191 202 500 1830 1090 547 409 262 386 29 849 373 227 191 —— 534 1580 1080 565 411 271 373 30 792 363 225 191 —— 636 1390 1060 530 397 279 367 31 749 —— 222 191 —— 958 —— 1010 —— 371 272 —— TOTAL 22322 14710 8986 6220 5424 10067 88650 35443 17468 16760 8786 13558 MEAN 720 490 290 201 194 325 2955 1143 582 541 283 452 MAX 1330 712 379 220 202 958 4570 1790 948 983 361 679 MIN 227 347 222 191 190 204 1390 835 425 371 232 302 CFSM .53 .36 .21 .15 .14 .24 2.17 .84 .43 .40 .21 .33 IN. .61 .40 .25 .17 .15 .28 2.42 .97 .48 .46 .24 .37 AC-FT 44280 29180 17820 12340 10760 19970 175800 70300 34650 33240 17430 26890 CAL YR 1981 TOTAL 177329 MEAN 486 MAX 2090 MIN 100 CFSM .36 IN 4.85 AC-FT 351700 WTR YR 1982 TOTAL 248394 MEAN 681 MAX 4570 MIN 190 CFSM .50 IN 6.79 AC-FT 492700 70 ELM CREEK 3ASD 450450093272301 PISH LAKE INLET BEFORE WETLAND NEAR MAPLE GROVE, MM LOCATION.—Lat 45°04'50", long 93°27'23", in SEJSrfi sec.27, T.119 N., R.22 W., Hennupin County, Hydrologic Unit 07010206, at culvert on Slope Drive, 0.4 mi (0.6 km) above Fish Lake, near Maple Grove. DRAINAGE AREA. —1.1 mi 2 (2.85 km 2 ). PERIOD OP RECORD.—October 1981 to November 1982 (no winter records). GAGE.--Water-stage recorder. REMARKS.—Records good except those for periods of no gage-height record, Oct. 1 to Dec. 23 and Mar. 17 to Mar. 29, which are poor. EXTREMES TOR CURRENT PERIOD.—Water year 1982: Maximum discharge, 20 ftVs (0.57 m 3 /s) July 10, gage height, 3-38 ft (1.030 m); no flow on many days. October to November 1982: Maximum discharge during period, 15 ftVs (0.42 rt|3/ 3 ) Nov. 11, gage height, 3.12 ft (0.951 m); minimum, 0.02 ft 3 /s (0.001 nP/s) Oct. 1, gage height, 2.07 ft (0.63'l m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL A an SEP 1 .15 .12 .08 . — 2.5 .18 .44 .04 .00 .28 2 .15 .12 .08 2.5 .20 .33 .03 .00 .08 3 .15 .12 .08 . — 3.6 .16 .27 .02 .00 .05 4 .14 .12 .07 . — 2.6 1.7 .24 .01 .00 .03 5 .14 .12 .07 1.3 .96 .15 .00 .00 .26 6 .14 .11 .07 . _ 1.4 .68 .16 .09 .00 .06 7 .14 .11 .06 .94 .55 .05 .02 .00 .04 8 .14 .11 .06 .__ .68 .46 .03 .01 .00 .04 9 .14 .11 .06 . — .50 1.3 .02 .00 .00 .04 10 .14 .11 .05 .35 .61 .02 3-7 .00 1.3 11 .14 .11 .05 . _ .25 .46 .01 .51 .00 .19 12 .13 .11 .05 . — .26 .38 .01 .14 .00 .17 13 .13 .11 .04 . — .25 .89 .00 .06 .00 .12 14 .13 .11 .04 . — .22 .85 .01 .04 .00 .29 15 .13 .11 .03 .28 1.3 .01 .03 .00 .41 16 .13 .11 .03 __ .51 1.3 .00 .02 .00 .18 17 .13 .11 .03 ,26 .75 4.5 .00 .01 .00 .42 18 .13 .11 .03 .99 .52 3.3 .00 .00 .00 .15 19 .13 .11 .02 ,26 .55 1.5 .00 .00 .00 .11 20 .13 .11 .02 1.3 .96 .13 .00 .00 .18 21 .13 .11 .02 . _ .93 .78 .00 .00 .00 .23 22 .12 .11 .01 . — .59 .72 .00 .00 .00 .20 23 .12 .10 .01 43 .45 .68 .00 .00 .00 .11 24 .12 .10 —— .__ .34 .64 .08- .00 .04 .12 25 .12 .10 —— .27 .62 .03 .04 .00 .10 26 .12 .10 __ ._« .21 .66 .01 .20 .02 .08 27 .12 .10 —— . _ .17 .61 .00 .05 .09 .06 28 .12 .09 —— .__ .16 .47 .01 .02 .03 .04 29 .12 .09 —— 4 .15 .69 .05 .01 1.5 .04 30 .12 .09 —— 9 .16 .57 .04 .00 .21 .02 31 .12 —— —— 1 —— .60 — .00 .24 —— TOTAL 4.07 3.24 __ .__ 24.69 29.28 2.10 5.05 2.13 5.40 MEAN .13 .11 —— . — .82 .94 .070 .16 .069 .18 MAX .15 .12 —— . — 3.6 4.5 .44 3.7 1.5 1.3 MIN .12 .09 —— . — .15 .16 .00 .00 .00 .02 AC- FT 8.1 6.4 —— 49 58 4.2 10 4.2 11 71 KWl GR'iSK BASL'I

450450093272301

DAY OCT MOV DEJ J*U KEB I'l/Vrt APR MAY JUN JUL AUG SEP 1 .05 .16 2 .40 .09 3 .21 .50 4 .11 1.0 5 .12 1.5 6 .57 2.0 7 .32 2.0 8 .18 2.5 9 .20 2.9 10 .21 5.9 11 .17 4.9 12 .19 3.7 13 .14 ___ 14 .12 15 .13 —— 16 .10 _ _ 17 .07 18 .05 —— 19 1.4 ___ 20 1.5 —— 21 .48 ___ 22 .25 23 .20 ___ 24 .18 —— 25 .17 —— 26 .29 — _ 27 .93 ___ 28 .75 —— 29 .18 —— 30 .14 —— 31 .17 —— TOTAL 9.98 __ MEAN .32 — _ MAX 1.5 —— MIN .05 ___ AC-PT 20 —— ' '" ELM CRfiCK BASIN 450501093273201 PISH LAKE INLET AFTER WETLAND NEAR MAPLE GROVE, MN LOCATION.—Lat 45°05'01", long 93°27'32", In SW4SW4 sec.27, T.119 N., R.22 W., Hennepia County, Hydrologic Unit 07010206, at culvert on oil road on southeast end, 0.1 mi (0.2 km) above ^ish Lake near Maple Grove. DRAIUAGE AREA. —1.3 mi 2 (3-36 tan 2 ) . PERIOD OP RECORD.—October 1981 to November 1982 (no winter records'). GAGE.—Water-stage recorder. REMARKS.—Records good except those for periods of no gage-height record, Oct. 1 to Dec. 14 and Mar. 17 to Mar. 31, which are poor. EXTREMES FOR CURRENT PERIOD.—Water year 1982: Maximum discharge, 9.6 ft 3 /s (0.27 m3/s) July 10, gage height, 2.95 ft (0.899 ra); no flow on many days. October to November 1982 (no record Oct. 3-l6): Maximum discharge during period, 3.6 ft 3 /s (0.10 m 3 /s) Oct. 27, gage height, 1.54 ft (0.469 m); no flow at ti-nes.

DISCHARGE, I\i CUBIC PSET PER SECOND, 4,YTER YEAR OCTOBER 1981 TO SEPTEMBER l'>32 MEAN VALUES DAY OCT MOV DEC JAM MAR APR MAY JUN AUC SEP 1 .10 .08 .05 1.9 .12 .23 .00 .00 .96 2 .10 .08 .05 2.2 .12 .18 .00 .00 .31 3 .10 .08 .05 4.0 .09 .16 .00 .00 .29 4 .10 .08 .04 2.7 1.9 .14 .00 .00 .26 5 .10 .08 .04 — 1.6 .84 .11 .00 .00 .69 6 .10 .08 .04 _ _ 1.2 .37 .11 .03 .00 .33 7 .10 .08 .03 —— 1.0 .27 .05 .00 .00 .33 8 .10 .08 .03 —— .75 .22 .02 .00 .00 .31 9 .10 .08 .03 —— .58 1.1 .00 .00 .00 .30 10 .10 .08 .02 — .47 .33 .00 4.5 .00 2.6 11 .09 .08 .02 __ .39 .24 .00 .87 .00 • 55 12 .09 .08 .02 —— .37 .80 .00 .19 .00 .45 13 .09 .08 .01 —— .34 .94 .00 .12 .00 .34 14 .09 .07 .01 — _ .32 .59 .00 .07 .00 .48 15 .09 .07 —— — .36 .89 .00 .01 .00 .63 16 .09 .07 _ _ -.__ .59 1.3 .00 .00 .00 .42 17 .09 .07 —— .31 .72 3.1 .00 .00 .38 1.1 18 .09 .07 —— 1.4 .45 3.7 .00 .00 .21 .46 19 .09 .07 ___ .98 .49 1.2 .00 .00 .17 .32 20 .09 .07 —— .22 1.4 .81 .03 .00 .13 .34 21 .09 .07 ___ _ _ .83 .61 .00 .00 .09 .48 22 .09 .07 ___ .18 .52 .54 .00 .00 .05 .43 23 .09 .07 —— .63 .39 .46 .00 .00 .02 .32 24 .09 .07 —— .12 .31 .40 .11 .00 .45 .32 25 .09 .06 —— —— .26 .38 .00 .12 .19 .28 26 .09 .06 _ _ _ _ .21 .45 .00 .00 .79 .27 27 .09 .06 —— .17 .42 .00 .00 .55 .23 28 .08 .06 —— ___ .15 .27 .00 .00 .21 .21 29 .08 .06 —— .06 .13 .52 .02 .00 2.6 .21 30 .08 .05 —— 4.3 .13 .32 .00 .00 .55 .20 31 .08 —— —— 2.6 — - .37 —— .00 .34 —— TOTAL 2.85 2.16 _ _ ___ 24.93 23.67 1.16 5.91 6.73 14.42 MEAN .092 .072 —— .83 .76 .039 .19 .22 .48 MAX .10 .08 —— ___ n.o 3.7 .23 4.5 2.6 2.6 MIN .08 .05 — _ .13 .09 .00 .00 .00 .20 AC-PT 5.7 4.3 —— --- 49 47 2.3 12 13 29 ELM CREEK BASi:j 450501093273201 FISH LAKE INLET AFTER WETLAND NEAR MAPLE GROVE, MN—Continued DISCHARGE, IN CUBIC FEET PEK SECOND, WATER YEAR OCTOBER 1982 TO SEPTEMBER 1983 MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY .TUN JUL ALJG 1 .20 .12 2 .37 .02 3 ___ —— 4 ___ 5 —— --- 6 __ __ 7 ___ 8 .- . 9 -__ -__ 10 —— --- 11 — . _-. 12 ___ 13 ___ ._ - 14 —— 15 —— _-_ 16 __ „_ 17 .00 18 .00 19 .22 20 1.5 —— 21 .24 _-_ 22 .12 —— 23 .10 24 .10 25 .11 - — 26 .18 _ _ 27 1.2 28 .59 —— 29 .15 __„ 30 .09 —— 31 .05 —— TOTAL ______MEAN ___ MAX -__ MIH ___ _,-_ AC- FT —— -__ 74 ELM CREEK BASIN 450613093275301 LAKE OUTLET HEAR INTERSTATE 94 IN MAPLE GROVE, MN LOCATION.—Lat 45°06'13", long 93°27'53", in EJ sec.21, T.119 N., R.22 W., Hennep.ln County, Hydrologic Unit 07010206, at culvert on 85th Avenue North (Weaver Lake Road) near Interstate 94 in Maple Grove. DRAINAGE AREA.—3.24 mi 2 (8.38 km 2 ). PERIOD OF RECORD.—October 1981 to November 1982 (no winter records). GAGE.—Water-stage recorder. REMARKS.—Records good except those for periods of no gage-height record, Oct. 1 to Nov. 7 and Mar. 26 to Mar. 29 , which are poor. EXTREMES FOR CURRENT PERIOD.—Water year 1982: Maximum discharge, 12 ftVs (0.34 m3 /s) Apr. 3, gage height, 4.49 ft (1.369 m); no flow on nany days. October to November 1982: Maximum discharge during period, 0.50 ftVs (0.014 mVs) Oct. 6, gage height, 3.37 ft (1.027 m); minimum, 0.17 ft^/s (0.005 mVs) Oct. 19, gage height, 3.20 ft (0.975 m).

DISCHARGE, IN CUBIC FEET PAR SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUO SEP 1 .02 .01 —— 8.9 2.6 3.0 .66 .25 .22 2 .02 .01 10 2.5 2.7 .61 .23 .20 3 .02 .01 11 2.4 2.5 .56 .20 .18 4 .02 .01 —— 11 2.7 2.4 .50 .18 .16 5 .02 .01 — 10 3.7 2.2 .49 .16 .19 6 .02 .01 _ _ 9.3 3.8 2.2 .55 .14 .18 7 .02 .01 —— 8.6 3.6 2.0 .52 .12 .17 8 .02 8.0 3.4 1.9 .46 .09 .16 9 .02 —— 7.5 3.7 1.8 .43 .04 .16 10 .02 — 7.0 3.8 1.6 .70 .00 .39 11 .02 _ _ 6.4 3.5 1.5 .84 .00 .45 12 .02 6.0 3.6 1.4 .79 .00 .47 13 .02 —— 5.7 4.0 1.2 .74 .00 .45 14 .02 5.3 4.2 1.2 .70 .00 .43 15 .02 —— 5.1 4.2 1.2 .66 .00 .51 16 .02 _ _ 5.1 4.6 1.2 .62 .00 .52 17 .02 —— 5.2 5.0 1.1 .55 .00 .56 18 .02 — _ 4.9 6.2 • 99 .48 .00 .65 19 .02 —— 4.7 6.0 .94 .44 .00 .62 20 .02 —— 5.2 5.8 1.0 .41 .00 .56 21 .01 __ 5.1 5.5 .96 .37 .00 .53 22 .01 4.9 5.1 .88 .34 .00 .52 23 .01 ___ 4.7 4.8 .84 .31 .00 .45 24 .01 '1.4 4.5 .90 .30 .00 .41 25 .01 — 4.0 4.2 .87 .34 .04 .38 26 .01 .13 3.7 4.0 .81 .42 .04 .35 27 .01 .82 3.5 4.0 .77 .41 .06 .31 28 .01 2.2 3.2 3.8 .76 .38 .05 .30 29 .01 4.2 3.0 3.7 .78 .35 .14 .27 30 .01 6.0 2.8 3-6 .72 .30 .18 .23 31 7.6 —— 3.3 —— .27 .17 —— TOTAL __ 184.2 125.8 42.32 15.50 2.09 10.98 MEAN 6.14 4.06 1J41 .50 .067 .37 MAX 11 6.2 3.o .84 .25 .65 MIN —— 2.8 2.4 :72 .27 .00 .16 AC-FT —— 365 250 84 31 4.1 22 Kl.A CHEEK BASItf 450613093275301 PISH LAKE OUTLET NEAR INTERSTATE 94 IN MAPLE GROVE, MM—Continued

DAY OCT ,MOV DEC MM FKB MArt APR MAY JUW JUL AUG SEP 1 .21 .25 2 .29 .25 3 .32 .25 4 .31 .21 5 .30 .17 6 .40 .14 7 .45 .14 8 .45 —— 9 .45 10 .45 —— 11 .46 ___ 12 .47 —— 13 .48 ___ 14 .42 ___ 15 .39 — - 16 .33 __ 17 .30 ___ 18 .25 —— 19 .24 20 .47 —— 21 .45 _ _ 22 .42 —— 23 .37 24 .34 —— 25 .29 —— 26 .28 __ 27 .28 —— 28 .29 —— 29 .27 —— 30 .25 —— 31 .23 —— TOTAL 10.91 MEAN .35 — _ MAX .48 —— MIN .21 AC-PT 22 —— 76 ELM CREEK BASIN 05287890 ELM CHEEK NEAR CHAMPL1M, MN LOCATION.—Lat 45°09'48", long 93°26'11", in NEJNWi .sec.35, T.120 N., R.22 W., Hennepin County, Hydrologic Unit 07010206, on left bank, 33 ft (10 in) downstream froin bridge on Elm Creek Road, 2.5 mi (4.0 km) southwest of Champlin. DRAINAGE AREA.—84.9 mi 2 (220 km 2 ). PERIOD OP RECORD.--October 1978 to current year. GAGE.—Water-stage recorder. Datum of gage is 850.71 ft (259.296 m) National Geodetic Vertical Datum of 1929- Prior to March 15, 1979, nonrecording gage at present site and datura. REMARKS.—Records good except those for winter period, which are fair. EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 414 ft3/ s (11.7 mVs) Apr. 3, 1982, gage height, 9.23 ft (2.813 m); minimum daily, 1.3 ft3/ s (0.037 m3/ s ) Feb. 5-20, 1982, mininum gage height, 2.86 ft (0.872 m) Feb. 24, 1980. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 4l4 ft3/s (11.7 m3/s) Apr. 3, gage height, 9.23 ft (2.813 m); minimum daily, 1.3 ft3/ s (0.037 i i3/s) Feb. 5-20; minimum gage height, 2.88 ft (0.878 m) Jan. 20.

DISCHARGE, IN CUBEC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB 1AR APR MAY JUN JUL A no SEP 1 3-5 5.4 5.6 2.5 1.4 2.5 338 54 40 3.2 3.4 5.8 2 3.2 5.1 5.6 2.5 1.4 2.5 379 50 36 7.6 3.3 5.0 3 3.0 4.9 5.3 2.4 1.4 2.5 406 47 32 7.5 3.2 4.0 4 5.1 5.0 5.3 2.4 1.4 2.5 398 49 30 7.4 3-1 3.5 5 3.7 5.0 5.2 2.4 1.3 2.5 369 68 27 7.0 2.9 4.6 6 4.1 4.7 5.2 2.4 1.3 2.4 351 68 26 7.7 2.9 4.3 7 3.8 4.8 6.1 2.4 1.3 2.4 327 68 25 7.4 2.8 3-9 8 3.5 5.1 5.4 2.4 1.3 2.4 298 67 23 6.5 2.8 3.9 9 3-3 5.0 4.8 2.4 1.3 2.4 263 69 22 6.3 2.7 3.8 10 3.6 4.6 4.6 2.3 1.3 2.4 231 70 21 7.2 2.4 5.8 11 3.8 4.3 4.6 2.3 1.3 2.4 200 67 20 7.1 2.3 6.2 12 3.8 4.3 4.8 2.3 1.3 2.5 180 64 19 6.4 2.4 5.2 13 4.0 5.2 4.8 2.3 1.3 2.6 164 73 17 6.2 2.6 4.8 11 7.2 5.6 4.5 2.3 1.3 2.7 147 75 17 6.1 2.9 4.4 15 6.0 5.0 4.3 2.2 1.3 2.8 135 75 18 5.8 2.8 5.0 16 5.1 4.7 4.0 2.2 1.3 3.0 126 84 16 5.8 2.9 4.9 17 7.4 5.1 3.7 2.2 1.3 3.2 123 89 15 5-5 3.2 4.6 18 7.4 5-0 3.5 2.1 1.3 3.4 115 119 14 4.9 3.2 4.1 19 6.9 5.4 3-3 2.1 1.3 3.7 108 117 14 4.6 3.1 3.7 20 6.5 5.7 3.1 2.0 1.3 4.0 109 113 15 4.5 2.9 3.4 21 5.8 5.3 3.0 2.0 1.4 4.5 109 110 11 4.4 2.6 3.1 22 5.8 5.1 2.9 1.9 1.5 5.5 107 105 12 4.2 2.9 2.8 23 5.9 5.2 2.8 1.9 1.7 6.5 104 96 11 3.8 2.6 2.8 24 5.5 5-5 2.8 1.8 2.0 8.0 100 85 12 3.8 2.9 2.9 25 6.0 5.7 2.7 1.8 2.3 10 95 73 11 4.2 3.6 2.9 26 6.0 5.9 2.7 1.7 2.4 14 86 65 10 4.8 3.3 2.9 27 6.1 5.8 2.6 1.6 2.4 20 76 61 9.4 4.6 4.4 2.7 28 5.7 5.4 2.6 1.6 2.5 40 70 56 9.3 4.1 3.5 2.8 29 5.9 5.2 2.6 1.5 75 64 51 9.7 3.8 6.5 3.1 30 5.9 5.3 2.5 1.5 —— 159 59 47 8.8 3.7 6.0 3.0 31 5.6 —— 2.5 1.5 —— 268 44 —— 3.5 4.2 —— TOTAL 159.1 154.3 123.4 64.9 42.6 665.3 5637 2279 554.2 174.6 100.3 119.9 MEAN 5.13 5.14 3.98 2.09 1.52 21.5 188 73.5 18.5 5.63 3.24 4.00 MAX 7.4 5.9 6.1 2.5 2.5 268 406 119 40 8.2 6.5 6.2 MIN 3.0 4.3 2.5 1.5 1.3 2.4 59 44 8.8 3.5 2.3 2.7 CFSM .06 .06 .05 .03 .02 .25 2.21 .87 .22 .07 .04 .05 IN. .07 .07 .05 .03 .02 .29 2.47 1.00 .24 .08 .04 .05 CAL YR 1981 TOTAL 3400 .6 MEAN 9.32 MAX 44 MIN 2.2 CFSM .11 IN 1 .49 WTR YR 1982 TOTAL 10074 .6 MEAN 27.6 MAX 406 MIN 1.3 CFSM .33 IN 4 .41 MISSISSIPPI RIVER MAIN STEM 77 05288500 MISSISSIPPI RIVER NEAR ANOKA, MN LOCATION. — Lat 45°07'36", long 93°17 t '48", in SWi sec. 12, T.119 N., R.21 W. , Hennepln County, Hydrologic Unit U7010206, on right bank 0.4 mi (0.6 km) downstream from Coon Creek, 1.3 mi (2.1 km) downstream from Coon Rapids 3am at Coon Rapids, 6.5 ni (10.5 km) downstream from Anoka, and at mile 864.8 (1,391.5 km) upstream from Ohio River. DRAINAGE AREA. — 19,100 mi 2 (4 a ,500 km 2 ), approximately. WATER-DISCHARGE RECORDS P SKIDD OP RECORD. — June 1931 t :> current year, ^rior to October 1931 published as "at Coon Rapids, near Anoka." GAGE. — Water-stage recorder. Datum of gage Is 304.53 ft (245.221 m) National Geodetic Vertical Datum of 1929. Prior to June 14, 1932, at site 1.2 mi (1.9 kn) upstream at different datum. REMARKS. --Records good. Plow slightly regulated by six reservoirs on headwaters; total usable caoacity, 1,640,600 acre-ft (2.02 km'). Diurnal regulation caused by dam above station. AVERAGE DISCHARGE. — 51 years, 7,579 ftVs (214.6 i, 5.39 in/yr (137 ran/yr). EXTREMES FOR PERIOD DF RECORD. — Maximum discharge, 91,000 ft 3 /s (2,580 n-/s) Apr. 17, 1965, >tage height, IP. 53 ft (5-953 m); minimum, 529 ft3/s (15.0 ra3/s) Aug. 29, 1976, gage height, 0.04 ft (0.012 m), result of regulation. EXTREMES FOR CURRENT YEAR. — Maximum discharge, 44,400 ft 3 /s (1,260 nVs) Apr. 20, gage height, 12.1? ft (3.694 -O ; minimum discharge, 2,600 ftVs (73.6 mVs) Aug. 26; minimum gage height, 1.69 ft (0.515 m) Aug. 26.

DISCHARGE, IN CUBIC ^EET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 198; MEAN VALUES

DAf oca JAN FE3 MAR APR MAY SEP 1 3940 12200 7430 5910 4400 4790 19400 26800 21900 9280 6280 3690 2 3410 12200 7700 5420 4500 4690 24200 25100 20900 8750 6650 3430 3 4710 11700 7200 5510 4500 4650 26000 24000 19700 8610 5740 4190 4 4670 11500 7110 5520 4500 4510 26600 22900 19000 8110 4670 3670 5 5240 11200 6640 4640 4500 4510 28500 22800 17700 7280 4690 2990 6 6-340 11200 6270 4800 4550 4850 31500 22400 16700 7930 5360 3140 7 6370 10600 6250 4800 4600 4860 32700 21500 15300 8250 4620 3050 8 6550 10700 5880 4800 4600 4860 33600 20100 15700 7630 4710 4480 9 7060 10500 6120 4800 4600 5680 33200 19200 13700 7800 4160 3540 10 8020 9490 5430 4800 4600 6290 33400 20600 12700 8490 4360 3900 11 7980 9660 4450 4600 4600 4490 33100 19800 11500 9040 4310 3830 12 8540 9360 5270 4850 4650 4440 31800 18700 11600 9310 4020 4680 13 8270 8940 5550 4650 4850 4540 30700 19200 11900 9710 3380 5210 14 9410 8970 5080 4400 4830 4770 30100 19800 11400 Q280 3470 5370 15 9720 8910 4390 4400 4770 44-40 30800 20600 11100 9530 3560 5380 16 10500 8780 3490 4350 4760 4590 32900 21100 10100 9290 3840 5480 17 11400 8520 2930 4350 5040 4730 36100 22100 9980 9090 4120 7180 18 12800 8680 2810 4350 4950 4920 39300 24100 10100 8610 3970 6470 19 12800 8680 3850 4400 4750 5390 42400 27900 10100 8050 3600 6710 20 14000 8120 3840 4400 4880 5440 44200 33100 9750 8090 3450 6710 21 14600 7320 3230 4400 5080 5500 43300 34900 9370 7650 3550 7110 22 14700 7340 4570 4400 5040 5810 42400 33800 9340 6910 3450 6680 23 14700 7620 5930 4400 4810 5980 40700 32300 8910 6590 3250 6030 24 14500 7330 5500 4400 4820 6850 39100 31400 8780 6340 3410 5980 25 14400 7290 5500 4400 4770 7270 36900 30200 9800 7070 3640 5410 26 14200 7730 5220 4400 4720 7560 35400 28700 9260 7500 3150 5280 27 14200 7770 5460 4350 4370 8370 32800 27700 9770 6650 3430 5680 28 13300 7620 5730 4200 4530 9540 31300 26600 9510 5960 3430 5130 29 13200 7460 5780 4200 —— 11400 29900 25200 9840 5870 3570 4970 30 13000 7320 5370 4250 —— 13900 28000 23800 9250 6370 3670 4400 31 12200 —— 5490 4400 —— 15600 —— 23300 —— 6010 3270 TOTAL 314730 274710 165470 143550 131570 195220 1000300 769700 374660 245050 126780 149770 MEAN 10150 9157 5338 4631 4699 6297 33340 24830 12490 7905 4090 4992 MAX 14700 12200 7700 5910 5080 15600 44200 34900 21900 9710 6650 7180 MIN 3410 7290 2810 4200 4370 4440 19400 18700 8780 5870 3150 2990 CFSM .53 .48 .28 .24 .25 .33 1.75 1.30 .65 .41 .21 .26 IN. .61 .54 .32 .28 .26 .38 1.95 1.50 .73 .48 .25 .29 CAL YR 1981 TOTAL 2401650 MEAN 6580 MAX 14700 MIN 1450 CFSM .35 IN 4.68 WTR YR 1982 TOTAL 3891510 MEAN 10660 MAX 44200 MIN 2810 CFSM .56 IN 7.58 78 MISSISSIPPI RIVER MAIN STEM 05288500 MISSISSIPPI RIVER NEAR ANOKA, MN--Continued WATER-QUALITY RECORDS LOCATION.--Sediment samples collected at Camden Avenue bridge, In Minneapolis, 7.0 mi (11 km) downstream from gage. Tritium samples collected at gage near right bank. Prior to October 1, 1978, sediment samples collected at Lowry Avenue bridge. DRAINAGE AREA. —19,600 mi 2 (50,800 km 2 ), approximately. PERIOD OP RECORD.—Water years 1963-67, 1975 to current year. PERIOD OF RECORD.— WATER TEMPERATURES: October 1975 to current year. SUSPENDED SEDIMENT DISCHARGE: August 1975 to current year. REMARKS.—During the winter period, daily suspended-sediment load was estimated on the basis of water records and monthly sediment samples. Water temperature was obtained once-daily for most of the open water period and monthly for winter period. EXTREMES FOR PERIOD OP DAILY RECORD.— SEDIMENT CONCENTRATIONS: Maximum daily mean, 128 mg/L Apr. 24, 1979; minimum daily mean, 1 rag/L on several days in 1978, 1980, 1981, and 1982. SEDIMENT LOADS: Maximum daily, 17,400 tons (15,800 tonnes) Apr. 20, 1982; minimum daily, 3.9 tons (3.5 tonnes) Feb. 2, 1981. EXTREMES FOR CURRENT YEAR.— SEDIMENT CONCENTRATION: Maximum daily mean, 210 mg/L Apr. 3; minimum daily mean, 1 mg/L Nov. 26-28. SEDIMENT LOADS: Maximum daily, 17,400 tons (15,800 tonnes) Apr. 20; minimum daily, 21 tons (19 tonnes) Nov. 26- 28.

TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 ONCE-DAILY DAY OGT NOV DEC JAN FEB MAR APR MAY JUW JUL AUG SEP

1 12.0 9.0 1.0 —— 4.0 14.0 19.0 25.0 28.0 23.0 2 10.0 5.0 1.0 —— 5.0 17.0 20.0 25.0 27.5 22.0 3 11.0 6.0 1.0 —— —— 17.0 20.0 25.0 29.0 23.0 4 12.0 8.0 2.0 19.0 20.0 28.0 30.0 20.0 5 11.0 8.0 — 1.0 15.0 20.0 28.0 30.0 20.0 6 11.0 5.0 _ _ 2.0 14.0 20.0 28.0 30.0 18.0 7 10.0 7.0 —— 2.0 15.0 19.0 28.0 29.0 19.0 8 11.0 6.0 1.0 1.0 16.0 20.0 26.0 26.0 19.0 9 11.0 4.0 —— 2.0 17.0 19.0 26.0 23.0 19-0 10 12.0 4.0 —— 2.0 19.0 19.0 20.0 23.0 20.0 11 13.0 5.0 ___ 3.0 18.0 21.0 23.0 24.0 23.0 12 12.0 5.0 3.5 16.0 20.0 25.0 24.0 23.0 13 12.0 5.0 3.0 6.0 17.0 22.0 26.0 22.0 19.0 14 12.0 8.0 5.0 7.0 19.0 20.0 27.0 24.0 17.0 15 12.0 3.0 9.0 18.0 20.0 25.0 24.0 16.0 16 12.0 6.0 3.0 8.0 19.0 22.0 26.0 25.0 16.0 17 12.0 5.0 .0 5.0 7.0 18.5 21.0 25.0 27-0 16.0 18 9.0 5.0 5.0 7.0 18.0 20.0 26.0 27.0 14.0 19 7.0 3.0 2.0 7.0 19.0 20.0 28.0 29.0 16.0 20 9.0 1.0 1.0 7.0 18.0 19.0 28.0 27.0 15.0 21 8.0 _ _ 8.0 17.0 21.0 27.0 27.0 16.0 22 6.0 4.0 9-0 —— 22.0 28.0 25.0 17.0 23 5.0 5.0 12.0 —— 22.5 28.0 25.0 17.0 24 6.0 1.0 4.0 12.0 —— 22.0 25.0 23.0 —— 25 4.0 2.0 2.0 13.0 19.0 22.0 27.0 25.0 —— 26 5.0 2.0 12.0 18.0 22'. 0 25.0 23.0 __ 27 4.0 3.0 14.0 19.0 25J.O 26.0 22.0 —— 28 5.0 1.0 4.0 14.0 20.0 261.0 28.0 20.0 —— 29 6.0 4.0 14.0 —— 24J.O 27.0 20.0 —— 30 8.0 1.0 4.0 14.0 —— 241.0 26.0 22.0 —— 31 —— 5.0 —— —— —— 28.0 22.0 —— MEAN 9.5 7-0 21.0 26.0 25.0 WTR YR 1982 MAX 30.0 MIN 79 MISSISSIPPI RIVER MAIN STEM 05288500 MISSISSIPPI RIVER NEAR ANOKA, MN—Continued SUSPENDED-SEDIMENT, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN MEAN MEAN MEAN MEAN MEAN CONCEN- CONCEN- CONCEN- COIJCEN- CONCEN- CONCEN­ TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS DAY (MG/L) (T/DAY) (MCJ/L) (T/DAY) (HG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH 1 11 117 21 692 3 36 7 91 2 9 83 24 791 3 36 7 89 3 25 318 36 1140 3 36 7 88 4 6 76 24 745 3 36 7 85 5 5 71 19 575 3 36 7 85 6 7 120 18 544 3 37 8 105 7 6 103 21 601 3 37 10 131 8 6 106 16 462 3 37 14 184 9 8 152 13 369 3 37 15 230 10 9 195 20 512 4 50 17 289 11 9 194 12 313 5 62 20 242 12 16 369 14 354 6 75 22 264 13 15 335 8 193 7 92 23 282 14 16 407 7 170 8 104 24 309 15 26 682 8 192 9 116 23 276 16 22 624 8 190 9 116 19 235 17 26 800 6 138 9 122 18 230 18 32 1110 5 117 8 107 15 199 19 31 1070 10 234 7 90 10 146 20 29 1100 5 110 7 92 14 206 21 37 1460 5 99 7 96 13 193 22 32 1270 5 99 7 95 10 157 23 31 1230 4 82 7 91 11 178 24 28 1100 3 59 7 91 17 314 25 24 933 2 39 7 90 20 393 26 20 767 1 21 7 89 24 490 27 18 690 1 21 7 83 35 791 28 20 718 1 21 7 86 56 1440 29 20 713 2 40 .- —— 93 2860 30 22 772 2 40 ._ —— 125 4690 31 22 725 —— — —— 146 6150 TOTAL 18410 8963 21422 APRIL MAY SEPTEMBER 1 164 8590 55 3980 38 2250 42 1050 27 458 20 199 2 204 13300 48 3250 40 2260 46 1090 16 287 12 111 3 210 14700 38 2460 46 2450 30 697 48 744 23 260 4 193 13900 42 2600 45 2310 34 744 45 567 14 139 5 167 12900 45 2770 33 1580 32 629 20 253 7 57 6 147 12500 43 2600 34 1530 26 557 21 304 22 187 7 139 12300 45 2610 40 1650 37 824 30 374 20 165 8 135 12200 39 2120 35 1480 37 762 32 407 23 278 9 101 9050 37 1920 25 925 38 800 32 359 30 287 10 73 6580 40 2220 34 1170 50 1150 30 353 13 137 11 61 5450 37 1980 48 1490 34 830 17 198 14 145 12 56 4810 35 1770 55 1720 24 603 17 185 23 291 13 56 4640 31 1610 51 1640 37 970 23 210 11 155 14 55 4470 30 1600 51 1570 35 877 26 244 11 159 15 55 4570 33 1840 61 1830 23 592 24 231 13 189 16 71 6310 39 2220 62 1690 18 451 30 311 14 207 17 105 10200 32 1910 47 1270 22 540 34 378 27 523 18 91 9660 28 1820 45 1230 32 744 22 236 14 245 19 107 12200 54 4070 54 1470 22 478 37 360 10 181 20 146 17400 54 4830 58 1530 14 306 25 233 9 163 21 115 13400 53 4990 58 1470 17 351 15 144 10 192 22 72 8240 63 5750 51 1290 13 243 15 140 14 253 23 66 7250 60 5230 39 938 11 196 11 97 13 212 24 75 7920 58 4920 52 1230 11 188 14 129 11 178 25 60 5980 56 4570 33 873 13 248 11 108 12 175 26 46 4400 52 4030 37 925 13 263 12 102 14 200 27 43 3810 55 4110 48 1270 38 682 15 139 16 245 28 42 3550 50 3590 48 1230 42 676 14 130 12 166 29 53 4280 42 2860 28 744 37 586 16 154 11 148 30 53 4010 41 2630 34 849 50 860 24 238 14 166 31 39 2450 —— —— 57 925 25 221 —— —— TOTAL 258570 95310 '43864 19912 8294 6013 TOTAL LOAD FOR YEAR: 486333 TONS, MISSISSIPPI RIVER MAIM STEM 05288500 MISSISSIPPI RIVER NEAR ANOKA, MN—Continued RADIOCHEMICAL ANALYSES, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

TRITIUM TRITIUM IN WATER WATER MOLE- MOLE- GULES CULES COUNT TIME ERROR DATE (TU) (TU) (07012) (07013) OCT 02.. 60.5 4.8 NOV 08... 0845 60.4 2.5 FEB 08.. 0810 56.6 2.1 APR 12.. , 1037 40.2 1.5 MAY 17... 1200 46.6 1.9 JUN 23... 1030 52.2 1.9 AUG 02.., 1155 55.3 2.3 SEP 24.., 1345 49.5 4.8

PARTICLE-SIZE DISTRIBUTION OP SURFACE BED MATERIAL, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 BED BED BED BED BED BED BED BED BED NUMBER MAT. MAT. MAT. MAT. MAT. MAT. MAT. MAT. MAT. OP STREAM- SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SAM­ PLOW, DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. PLING INSTAN­ % PINER % PINER % PINER % PINER % PINER % PINER % PINER % PINER % PINER TIME POINTS TANEOUS THAN THAN THAN THAN THAN THAN THAN THAN THAN DATE (CPS) .062 MM .125 MM .250 MM .500 MM 1.00 MM 2.00 MM 4.00 MM 8.00 MM 16.0 MM (00063) (00061) (80164) (80165) (80166) (80167) (80168) (80169) (80170) (8017D (80172) MAY 14... 1430 5860 37 82 91 97 100 81 MISSISSIPPI RIVER MAIN STEM 05288550 MISSISSIPPI RIVER AT PRIDLEY, MN LOCATION.—Lat 45°06'12", long 93°l6'37", in SWJNE4 sec.10, T.30 N., R.24 W., Anoka County, Hydrologic Unit 07010206, on left bank at St. Paul Pumping Station in Pridley, 0.9 mi (1.5 km) upstream from Rice Creek, and 3.4 mi (5.5 km) downstream from Coon Rapids Dam, and at mile 862.8 (1,388 km) upstream from Ohio River. PERIOD OP RECORD.—Water years 1975 to current year. PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE: November 1974 to current year. pH: November 1974 to current year. WATER TEMPERATURES: November 1974 to current year. DISSOLVED OXYGEN: November 1974 to current year. INSTRUMENTATION.—Water quality monitor since November 1974. REMARKS.—Extremes are published for years with 80 percent or more daily record. COOPERATION.—Water-quality monitor is operated by the Metropolitan Waste Control Commission, St. Paul, MN. EXTREMES FOR PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE (water year 1981): Maximum, 473 micromhos Sept. 30, 1981; minimum, 212 micromhos Mar. 13, 1981. pH (water year 1981-82): Maximum, 8.7 units Apr. 16, 18-20, 1981; minimum, 7.1 units Apr. 4-6, 1982. WATER TEMPERATURES (water year 1981-82): Maximum, 29-5°C July 6, 1981; minimum, 0.0°C several days during winter period. DISSOLVED OXYGEN (water year 1981-82): Maximum, 17.6 mg/L Mar. 7, 8, 1981; minimum, 2.9 mg/L July 27, 1981. EXTREMES FOR CURRENT YEAR.— pH: Maximum, 8.5 units several days during summer period; minimum, 7.1 units Apr. 4-6. WATER TEMPERATURES: Maximum, 28.0°C Aug. 4-6; minimum, 0.0°C several days during winter period. DISSOLVED OXYGEN: Maximum, 16.3 mg/L Mar. 14; minimum, 4.3 mg/L July 8.

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX WIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 462 431 439 2 449 417 428 3 415 389 406 4 393 361 379 5 373 339 353 6 ______7 —— —— —— 9 ______10 —— —— —— 11 ______12 —— —— —— 13 —— —— 14 —— —— —— 15 —— —— —— 16 ______17 —— —— —— 18 —— —— —— 19 —— —— —— 20 —— —— —— 21 ______22 —— —— —— 23 —— —— —— 24 —— —— —— 25 —— —— —— 26 ______27 —— —— —— 381 303 3t1 28 —— —— —— 404 291 345 29 —— —— —— 415 288 351 30 —— —— —— 404 310 353 31 —— —— —— 392 309 356 82 MISSISSIPPI RIVER MAIN STEM 05288550 MISSISSIPPI RIVER AT FRIDLEY, MN—Continued SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 409 309 371 443 312 379 3^5 210 291 244 244 244 2 419 298 374 446 300 383 307 154 274 252 252 252 3 411 279 367 448 283 375 291 177 241 261 260 261 4 442 315 386 418 310 374 285 265 275 5 452 313 390 455 307 379 252 189 211 282 279 281 6 445 304 379 452 306 380 238 182 213 276 273 275 7 419 303 374 414 258 371 217 180 193 267 267 267 8 453 311 369 451 319 389 192 171 182 260 259 260 9 456 308 390 415 303 359 187 163 174 254 253 253 10 458 308 403 452 300 375 247 247 247 11 452 346 397 443 303 384 200 173 186 12 459 345 398 456 298 381 211 183 200 13 457 306 397 449 306 378 246 158 228 14 447 342 402 441 305 378 247 185 241 15 493 345 423 414 309 365 244 187 240 16 493 390 425 458 319 392 230 154 200 17 496 301 397 442 311 386 18 481 296 372 451 340 389 19 459 282 366 440 295 369 247 247 247 20 443 341 391 402 242 341 251 251 251 21 447 250 386 457 318 381 241 241 241 254 254 254 22 417 290 373 446 295 370 241 241 241 258 257 257 23 443 314 380 415 309 366 242 241 241 260 260 260 24 411 300 364 413 317 381 242 241 242 263 263 263 25 452 302 382 415 242 340 242 241 242 265 265 265 26 451 316 391 411 307 363 244 241 243 255 251 253 27 440 300 382 405 308 356 241 210 222 256 254 255 28 454 341 388 440 297 368 218 218 218 252 252 252 29 —— —— —— 419 288 354 227 226 226 253 248 250 30 —— —— —— 409 310 360 235 234 234 254 249 251 31 —— —— —— 409 259 329 251 247 250 MONTH 496 250 386 458 242 371

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 250 247 248 314 309 311 351 344 347 335 308 328 2 250 248 249 316 311 313 350 344 346 337 329 332 3 252 247 250 316 310 313 348 344 346 333 318 328 4 252 245 249 345 316 331 357 340 349 332 324 327 5 249 245 247 347 342 344 348 342 345 330 311 327 6 252 246 251 344 316 333 346 341 344 335 327 330 7 252 247 249 318 310 314 359 340 354 332 328 329 8 281 247 263 316 309 313 356 350 353 330 323 326 9 284 259 278 340 314 318 351 340 344 329 322 325 10 283 280 282 319 301 310 342 317 326 333 285 324 11 283 258 278 311 305 308 340 317 339 337 327 332 12 287 282 285 312 306 309 348 318 333 340 334 337 13 314 285 306 317 310 313 348 342 344 337 333 335 14 317 313 315 319 312 316 350 342 344 349 325 340 15 319 300 310 341 316 320 350 342 345 343 335 336 16 324 305 318 341 314 325 350 342 345 339 336 337 17 322 315 318 345 340 342 347 318 333 340 336 338 18 327 320 324 349 340 346 345 319 340 343 333 338 19 337 331 334 348 344 346 347 314 340 344 338 341 20 343 326 339 346 343 345 348 334 339 339 334 336 21 ______346 343 345 344 337 341 337 331 333 22 356 353 354 351 342 346 341 334 337 335 329 332 23 353 348 350 353 347 350 344 336 339 336 331 334 24 350 338 346 354 343 351 340 326 334 340 335 337 25 342 338 340 354 313 347 338 333 335 343 337 339 26 337 333 335 347 319 343 337 301 332 340 334 337 27 338 330 336 348 341 344 335 322 328 336 331 334 28 339 327 342 354 344 349 337 326 330 338 306 308 29 336 308 325 359 340 353 329 273 316 339 307 310 30 311 307 309 355 349 352 330 315 322 339 312 315 31 —— —— —— 349 345 347 333 325 329 MONTH 359 301 332 359 273 339 349 285 331 83 MISSISSIPPI RIVER MAIN STEM

05288550 MISSISSIPPI RIVER AT PRIDLEY, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX WIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 7.8 7.6 7.7 7.8 7.7 7.7 8.0 7.9 8.0 7.6 7.5 7.6 2 7.9 7.6 7.7 7.8 7.7 7.7 8.0 7.9 8.0 7.5 7.5 7.5 3 7.8 7.7 7.7 7.8 7.7 7.7 8.0 8.0 8.0 7.5 7.5 7.5 4 7.7 7-6 7.6 7.8 7.7 7.7 8.0 8.0 8.0 7.6 7.5 7.5 5 7.6 7.5 7.6 7.8 7.7 7.8 8.1 8.0 8.0 7.6 7.5 7.6 6 7.8 . 7.5 7.7 7.8 7.8 7.8 8.0 8.0 8.0 7.7 7.6 7.6 7 7.9 7.7 7.8 7.9 7.8 7.8 8.0 8.0 8.0 7.7 7.5 7.6 8 8.0 7.8 7.9 7.8 7.8 7.8 8.1 8.0 8.0 7.5 7.5 7.5 9 7.9 7.7 7.8 7.8 7.8 7.8 8.1 8.0 8.0 7.5 7.5 7.5 10 7-7 7.7 7.7 7.8 7.8 7.8 8.0 8.0 8.0 7.5 7.5 7.5 11 7.9 7.7 7.8 7.9 7.8 7.8 8.0 8.0 8.0 7.5 7.5 7.5 12 7.8 7.7 7.8 7.9 7.8 7.9 8.0 8.0 8.0 7.5 7.5 7.5 13 7.8 7.6 7.7 7.9 7-9 7.9 8.0 8.0 8.0 7.5 7.5 7.5 14 7.6 7.6 7.6 8.0 7.9 7-9 8.0 8.0 8.0 7.5 7.4 7.4 15 7.6 7.6 7.6 8.0 7.9 7.9 8.0 8.0 8.0 7.4 7.4 7.4 16 7.6 7.6 7.6 7.9 7.9 7.9 8.0 7.9 8.0 7.4 7.4 7.4 17 7.6 7.5 7.6 8.0 7.9 7.9 8.0 7.9 7.9 7.4 7.4 7.4 18 7.6 7.5 7-5 8.0 7.9 7-9 7.9 7.9 7.9 7.4 7.4 7.4 19 7.5 7.5 7.5 7.9 7.9 7.9 7.9 7.8 7.9 7.4 7.4 7.4 20 7.8 7.5 7.7 7.9 7.9 7.9 7.8 7.8 7.8 7.4 7.4 7.4 21 7.8 7.8 7.8 8.0 7.9 7.9 7.8 7.7 7.7 7.4 7.4 7.4 22 7.8 7.7 7.8 8.0 7.9 8.0 7.8 7.7 7.8 7.4 7.4 7.4 23 7.7 7.7 7.7 8.0 7.9 7.9 7.8 7.7 7.7 7.5 7.4 7.5 24 7.9 7.6 7.8 7.9 7.9 7.9 7.7 7.7 7.7 7.5 7.5 7.5 25 7.9 7.9 7.9 7.7 7.7 7.7 7.5 7.5 7.5 26 7.6 7.5 7.5 7.9 7.9 7.9 7.7 7.7 7.7 7.7 7.5 7.6 27 7.8 7.6 7.7 8.0 7.9 7.9 7.7 7.6 7.6 7.7 7.7 7.7 28 7.7 7.6 7.6 8.0 7.9 7.9 7.7 7.6 7.7 7.7 7.7 7.7 29 7.7 7.7 7.7 8.0 7.9 8.0 7.7 7.6 7.6 7.7 7.7 7.7 30 7.7 7.7 7.7 8.0 8.0 8.0 7.6 7.6 7.6 7.7 7.7 7.7 31 7.8 7.7 7.7 7.6 7.6 7.6 7.7 7.7 7.7 MONTH 7.7 7-9 8.1 7.6 7.9 7.7 7.4 7.5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 7.7 7.7 7.7 7.8 7.8 7.8 7.8 7.5 7.6 8.0 7.9 7.9 2 7.7 7.7 7.7 7.8 7.8 7.8 7.5 7.4 7.5 8.1 7.9 8.0 3 7.7 7.7 7.7 7.8 7.8 7.8 7.5 7.2 7.3 8.1 8.0 8.0 4 7.7 7.5 7.7 7.8 7.8 7.8 7.5 7.1 7.1 8.1 7.5 8.0 5 7.5 7.5 7.5 7.8 7.8 7.8 7.5 7.1 7.3 7.9 7.9 7.4 6 7.5 7.5 7.5 7.8 7.8 7.8 7.5 7.1 7.3 7.9 7.8 7.9 7 7.6 7.5 7.5 7.9 7.8 7.8 7.5 7.5 7.5 8.0 7.8 7.9 8 7.6 7.5 7.5 7.9 7.6 7.8 7.5 7-5 7.5 8.0 7.9 8.0 9 7.6 7.5 7.6 7.9 7.8 7.9 7.5 7.4 7.5 8.1 8.0 8.0 10 7.8 7.5 7.6 7.9 7.8 7-9 7-6 7.5 7.5 8.1 7.9 8.0 11 7.8 7.5 7.6 8.1 7.9 8.0 7.6 7.4 7.5 8.1 8.0 8.0 12 7.8 7.5 7.6 8.1 7.9 8.0 7.4 7.4 7.4 8.1 8.0 8.0 13 7.8 7.6 7.7 8.1 7.9 8.0 7.5 7.4 7.4 8.0 7.9 8.0 14 7.8 7.6 7.7 8.2 7.9 8.1 7.5 7.5 7.5 8.0 8.0 8.0 15 7.8 7.6 7.7 8.1 8.0 8.0 7.8 7.5 7.6 8.0 7.9 8.0 16 7.9 7.6 7.8 8.0 7.6 7.9 7.8 7-6 7.7 8.1 8.0 8.0 17 7.9 7.8 7.9 8.1 8.0 8.1 7.8 7.5 7.6 8.1 8.0 8.0 18 7.9 7.9 7.9 8.2 7.9 8.0 7.6 7.5 7.5 8.0 7.9 8.0 19 7.9 7.6 7.8 8.1 7.9 8.0 7.5 7.5 7.5 8.0 7.9 8.0 20 7.9 7.8 7.9 8.0 7.9 8.0 7.5 7.5 7.5 8.0 7.9 7.9 21 8.0 7.8 7.9 8.0 8.0 8.0 7.6 7.5 7.5 7.9 7.9 7.9 22 7.9 7.8 7.9 8.1 7.8 7.9 7.8 7.5 7.7 7.9 7.8 7.9 23 8.0 7.6 7.8 8.0 7.8 7.9 7.9 7.6 7.8 7-9 7.8 7.9 24 7.9 7.8 7.9 7.8 7.6 7.7 8.0 7.9 7.9 7.9 7.9 7.9 25 7.9 7.9 7.9 7.8 7.5 7.6 8.1 7.9 8.0 8.0 7.9 7.9 26 7.9 7.8 7.8 7.8 7.5 7.6 8.1 8.0 8.0 8.0 8.0 8.0 27 7.8 7.8 7.8 7.9 7.4 7.7 8.0 7.9 8.0 8.0 7.8 7.9 28 7.8 7.8 7.8 7.8 7.5 7.6 8.0 7.9 7.9 8.0 7.9 8.0 29 —— —— —— 7.8 7.4 7.6 8.0 7.9 7.9 8.0 8.0 8.0 30 ______—— 7.6 7.4 7.5 8.0 7.9 7.9 8.1 8.0 8.1 31 —— —— —— 7.5 7.4 7.5 8.1 8.1 8.1 MONTH 8.0 7.5 7.7 8.2 7.8 8.1 7.1 LI 7.5 MISSISSIPPI RIVER MAIN STEM 05288550 MISSISSIPPI RIVER AT FRIDLEY, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER

1 8.2 8.1 8.1 8.1 8.0 8.1 8.5 8.1 8.2 8. it 8.1 8.2 2 8.2 8.0 8.1 8.2 8.0 8.1 8.5 8.0 8.2 8.5 8.2 8.3 3 8.2 8.0 8.1 8.2 8.0 8.1 8.2 8.1 8.1 8.5 8.1 8.3 it 8.2 8.0 8.1 8.2 8.0 8.1 8.5 8.1 8.2 8.5 8.2 8.3 5 8.2 8.0 8.1 8.4 8.0 8.1 8.5 8.0 8.3 8. it 8.2 8.3 6 8.2 8.0 8.1 8.2 8.0 8.1 8.5 8.1 8.3 8. it 8.1 8.3 7 8.2 8.0 8.1 8.2 8.0 8.1 8.5 8.0 8.2 8. it 8.1 8.2 8 8.4 8.0 8.2 8.2 8.0 8.1 8.5 8.0 8.2 8.3 8.1 8.2 9 8.4 8.1 8.2 8.2 8.0 8.1 8.5 8.1 8.2 8.3 8.0 8.2 10 8.4 8.1 8.3 8.0 7.9 8.0 8.5 8.1 8.3 8.2 7.9 8.1 11 8.5 8.2 8.3 8.0 7.9 7.9 8.5 8.1 8.2 8. it 8.0 8.1 12 8.4 8.1 8.2 8.1 7.9 8.0 8.4 8.0 8.1 8.2 8.0 8.1 13 8.2 8.0 8.1 8.1 8.0 8.0 8.4 8.0 8.1 8.0 7.9 8.0 IH 8.1 8.0 8.1 8.1 8.0 8.1 8.4 8.0 8.2 7.9 7.7 7.8 15 8.1 8.0 8.1 8.1 8.0 8.1 8.5 8.0 8.2 8.0 7.8 7.8 16 8.1 8.0 8.1 8.1 8.0 8.0 8.4 8.0 8.1 8.0 7.8 7.9 17 8.2 8.0 8.1 8.2 8.0 8.1 8.4 8.0 8.1 8.0 7.9 7.9 18 8.2 8.1 8.1 8.2 8.0 8.1 8.4 8.0 8.1 8.1 7.8 8.0 19 8.2 8.0 8.1 8.2 8.0 8.1 8.2 8.0 8.1 8.1 7.9 8.0 20 8.2 8.1 8.2 8.2 8.0 8.1 8.5 8.2 8.3 8.1 7.9 8.0

21 ___ — — — __ 8.2 8.0 8.1 8.5 8.2 8.3 8.1 7.9 8.0 22 8.1 8.0 8.0 8.2 8.0 8.1 8.4 8.2 8.3 8.2 7.9 8.0 23 8.1 8.0 8.0 8.2 8.0 8.1 8.4 8.2 8.3 8.2 8.0 8.0 24 8.1 8.0 8.0 8.2 8.0 8.1 8.3 8.2 8.2 8.2 8.0 - 8.1 25 8.1 8.0 8.1 8.2 8.0 8.1 8.4 8.1 8.2 8.2 8.0 8.0

26 8.2 8.1 8.1 8.2 8.1 8.1 8.4 8.2 8.2 8.3 8.0 8.1 27 8.4 8.1 8.2 8.2 8.0 8.1 8.4 8.1 8.3 8.1 8.1 8.1 28 8.4 8.1 8.2 8.4 8.0 8.2 8.4 8.1 8.2 8.4 8.0 8.3 29 8.1 8.0 8.1 8.5 8.0 8.3 8.2 8.0 8.1 8.1 8.0 8.2 30 8.1 8.0 8.0 8.5 8.1 8.2 8.4 8.1 8.2 8. it 8.1 8.2 31 —— —— —— 8.5 8.1 8.2 8.4 8.1 8.2

MONTH 8.5 7.9 8.1 8.5 8.0 8.2 8.5 7.7 J.I TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY

1 13.0 11.0 12.0 7.0 6.0 6.5 .5 .5 .5 .5 .5 .5 2 12.0 10.0 11.0 7.5 5.5 6.5 5 .5 .5 .5 .5 .5 3 10.5 9.5 10.0 7.5 5.5 6.5 5 .0 .5 .5 .5 .5 it 10.5 10.0 10.5 7.5 6.0 6.5 ,5 .0 .0 .5 .5 .5 5 11.0 10.5 11.0 7.0 6.5 7.0 5 .0 .0 .5 .5 .5

6 12.0 11.5 11.5 6.5 5.5 6.0 ,0 .0 .0 .5 .5 .5 7 12.0 11.0 11.0 6.5 5.5 6.0 5 .0 .5 .5 .5 .5 8 12.0 11.0 11.5 6.5 5.5 6.0 5 .0 .5 1.0 .5 1.0 9 11.0 10.5 11.0 5.5 4.0 4.5 .5 .0 .5 1.5 1.0 1.5 10 11.0 10.5 10.5 4.0 3.5 4.0 0 .0 .0 1.5 1.0 1.5

11 12.0 10.5 11.5 4.0 3.5 4.0 ,0 .0 .0 1.5 1.0 1.5 12 12.0 11.5 11.5 4.5 3.5 4.0 0 .0 .0 1.5 .5 1.0 13 12.0 11.5 12.0 5.0 4.0 4.5 5 .0 .0 1.0 1.0 1.0 lit 12.5 12.0 12.5 6.0 5.0 5.5 0 .0 .0 1.0 .0 .5 15 12.5 12.0 12.0 6.0 6.0 6.0 .5 .0 .5 1.0 .5 .5

16 12.0 11.5 12.0 6.0 5.5 5.5 5 .5 .5 1.0 .5 1.0 17 12.0 11.5 12.0 5.5 5.0 5.0 5 .5 •5 1.0 1.0 1.0 18 11.5 9.0 10.0 5.0 3.5 4.5 5 .5 .5 1.0 .5 .5 19 9.0 8.0 8.5 3.5 3.0 3.0 5 .5 .5 1.0 .0 .5 20 9.5 9.0 9.0 3.0 2.5 2.5 • 5 .5 .5 .0 .0 .0

21 9.0 8.0 8.5 2.0 1.0 1.5 5 .5 .5 .5 .0 .0 22 7.5 6.5 7.0 1.0 .5 .5 5 .5 .5 .5 .0 .0 23 6.0 5.0 5.5 1.0 .5 .5 5 .5 .5 .5 .0 .0 24 6.5 5.0 6.0 1.5 1.0 1.0 5 .5 .5 .5 .0 .0 25 7.0 5.5 6.5 1.5 1.0 1.5 5 .5 .5 .0 .0 .0

26 7.0 3.0 5.5 1.5 1.5 1.5 5 .5 .5 1.0 .0 .5 27 7-5 3.0 4.5 1.5 1.0 1.0 5 .5 .5 1.5 1.0 1.5 28 5.0 4.0 4.5 1.0 1.0 1.0 5 .5 .5 1.5 .5 1.5 29 6.0 4.5 5.5 1.5 1.0 1.0 .5 .5 .5 1.5 1.0 1.5 30 7.0 6.0 6.5 1.0 .5 .5 .5 .5 .5 1.5 .5 1.5 31 7.0 6.5 7.0 —— —— —— 5 .5 .5 1.5 .5 1.0 MONTH 13.0 3.0 9.5 7.5 .5 4.0 1.5 .0 .5 85 MISSISSIPPI RIVER MAIN STEM 05288550 MISSISSIPPI RIVER AT FRIDLEY, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1.5 1.5 1.5 3.0 1.0 2.5 8.0 1.0 4.0 15.0 12.0 13.5 1.5 1.0 1.5 2.5 .0 1.0 6.0 .5 2.5 15.5 12.5 14.5 1.0 .5 1.0 1.0 .0 .5 7.5 .0 4.0 16.0 15.0 15.5 1.0 .0 1.0 1.0 .0 .5 5.5 .0 2.5 16.0 15.0 15.5 1.0 .0 .5 .5 .0 .5 6.0 .5 2.0 18.0 15.0 16.0 1.0 .0 .0 1.0 .0 .5 5.0 .0 1.5 16.0 14.5 15.0 .0 .0 .0 1.0 .0 .5 5.5 5.0 2.0 15.0 14.0 14.5 .0 .0 .0 .5 .0 .5 7.0 6.5 2.0 16.0 14.5 15.0 9 .0 .0 .0 .5 .0 .5 2.5 4.5 1.5 16.0 15.0 15.5 10 .0 .0 .0 1.0 .0 .5 3.0 2.0 2.5 17.5 15.0 16.0 11 .0 .0 .0 2.5 .0 1.0 3.0 4.5 2.5 17.5 15.0 16.0 12 .0 .0 .0 2.0 .0 .5 2.5 2.0 2.5 16.0 14.0 15.0 13 .0 .0 .0 2.5 .0 1.5 5.0 2.5 4.0 15.0 14.0 14.5 14 .0 .0 .0 3.0 .5 2.0 6.0 4.5 5.0 16.0 15.0 15.5 15 1.0 .0 .5 3.0 .5 2.0 7.5 5.0 6.0 16.0 15.0 15.5 16 1.0 .0 .0 3.0 .5 2.5 7.0 6.5 7.0 17.0 15.0 16.0 17 .5 .0 .5 3.0 1.0 2.5 7.0 4.5 6.0 17.5 16.0 16.5 18 .5 .5 .5 4.5 2.0 3.0 7.0 6.0 6.5 16.0 15.5 15.5 19 .5 .5 .5 2.0 .0 1.0 6.5 4.5 5.5 17.5 15.0 16.0 20 .5 .5 .5 .5 .0 .0 6.0 5.0 5.5 17.5 15.5 17.0 21 1.0 .0 .5 2.5 .0 1.5 7.0 5.0 6.0 17.0 15.0 15.5 22 2.5 .0 1.5 2.5 .5 1.5 8.0 5.5 6.5 16.0 15.0 15.5 23 2.0 .0 1.0 3.0 .0 1.5 9.5 7.0 8.0 16.0 15.0 15.5 21 2.5 .0 1.0 3.0 2.0 2.5 11.0 8.0 9.5 17.5 15.0 16.0 25 2.5 1.0 2.0 2.0 .0 1.0 12.0 10.0 11.0 18.0 15.5 17.0 26 2.5 2.5 2.5 2.5 .0 1.0 12.5 10.0 11.5 21.0 17.5 19.0 27 2.5 1.0 2.5 2.5 .5 1.5 13.0 10.5 11.5 22.5 19.5 20.5 28 3.0 2.5 2.5 2.5 .5 1.5 13.0 11.0 12.0 23.0 19.0 21.0 29 2.0 2.0 2.0 13.0 12.0 12.5 19.5 17.0 18.5 30 2.0 2.0 2.0 13.0 12.0 12.5 19.0 17.0 18.0 31 4.5 2.0 2.5 18.0 17.0 17.5 MONTH 3.0 .0 1.0 4.5 .0 1.5 13.0 .0 6.0 23.0 12.0 16.0

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER

1 17.5 17.0 17.5 22.0 20.0 21.0 25.5 22.5 24.0 21.0 18.5 19.0 2 18.0 17.0 17.5 22.5 20.5 21.5 25.5 24.0 24.5 20.5 19.0 19-5 3 18.0 17.0 17.5 22.5 21.0 22.0 25.0 24.5 24.5 20.0 17.0 19.0 4 18.0 15.5 17.0 25.0 22.0 23.5 28.0 25.0 26.5 20.0 17.5 18.5 5 17.5 16.0 17.0 26.0 24.5 25.0 28.0 25.5 26.5 19.0 18.0 18.5

6 17.5 17.0 17.5 26.0 25.0 25.0 28.0 25.5 26.5 19.0 17.0 18.0 7 18.0 15.0 16.5 25.0 22.0 23.5 27.5 25.0 26.0 17.0 16.0 16.0 8 18.0 15.0 17.0 23.0 22.0 22.5 26.0 24.5 25.0 16.0 15.5 15.5 9 18.0 17.0 17.5 24.0 22.0 22.5 24.5 22.0 22.5 18.0 15.5 16.5 10 19.0 17.0 18.0 22.5 20.0 21.5 22.0 20.0 20.5 19.5 17.0 18.0

11 19.5 17.5 18.5 21.0 20.0 20.5 24.0 19.5 21.0 21.0 18.5 19.5 12 18.0 17.5 17.5 23.0 20.5 21.5 24.0 22.0 22.5 20.5 19.5 20.0 13 19.5 17.0 18.5 24.0 22.0 22.5 25.0 22.0 23.0 20.0 18.0 19.0 14 20.0 19.0 19.5 24.0 22.0 22.5 26.0 22.5 23.5 17.5 14.5 16.0 15 20.5 20.0 20.0 23.0 22.0 22.5 26.0 22.0 24.0 14.5 13.0 14.0

16 20.0 17.5 19.0 23.0 22.0 22.5 25.5 22.0 23.5 13.5 12.5 13.0 17 17.5 17.0 17.0 25.0 23.0 24.0 24.5 22.0 23.0 13.5 12.5 13.0 18 18.0 17.0 17.5 25.0 23.0 24.5 24.0 21.0 22.5 19 19.5 17.0 18.0 25.0 23.0 24.0 23.0 20.5 21.5 14.0 13.0 13.5 20 19.0 18.0 18.0 25.5 24.0 24.5 25.5 21.5 24.0 13.5 12.0 12.5

21 25.5 25.0 25.0 24.5 22.5 23.0 13.0 11.5 12.0 22 21.0 20.0 20.5 26.0 24.5 25.0 24.0 22.0 22.5 13.5 12.0 12.5 23 21.0 20.0 20.5 26.0 25.0 25.5 24.0 21.5 22.5 13.5 12.0 12.5 24 22.0 20.5 21.0 26.0 24.5 25.0 22.5 21.0 21.5 13.5 12.5 13.0 25 22.5 20.0 21.0 26.0 23.0 24.5 22.0 20.0 21.0 13.5 12.0 13.0

26 22.5 20.5 21.0 24.0 22.5 23.5 21.5 19.5 20.5 13.5 12.0 12.5 27 23.0 22.0 22.5 24.5 22.0 23.0 21.0 18.0 19.5 12.0 12.0 12.0 28 25.0 22.5 24.0 25.5 22.5 24.0 21.5 17.5 18.5 13.5 12.5 13.5 29 24.0 20.5 22.0 26.0 24.0 25.0 18.0 16.5 17.5 15.0 12.5 14.0 30 22.0 20.0 20.5 25.0 22.5 24.0 19.5 17.0 18.0 15.5 14.5 14.5 31 25.0 22.5 23.0 20.0 17.5 18.5 MONTH 26.0 20.0 23.5 28.0 16.5 22.5 MISSISSIPPI RIVER MAIN STEM 05288550 MISSISSIPPI RIVER AT FRIDLEY, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

OCTOBER NOVEMBER DECEMBER JANUARY 1 10.8 9.0 9-7 13.4 12.2 12.8 13.1 12.3 12.6 12.6 11.8 12.3 2 11.6 8.9 9.9 12.9 12.6 12.7 12.9 12.2 12.6 3 10.3 9.1 9.6 13.1 12.4 12.7 12.9 12.2 12.6 4 9-9 8.9 9.4 13^8 12.0 13.4 13.3 12.3 12.8 12.3 11.6 12.0 5 10.5 9-3 9.8 13.2 12.0 12.8 13.1 9.3 12.7 12.3 11.8 12.3 6 11.3 9.3 10.3 13.3 12.9 12.9 13.7 12.5 13.1 7 12.7 10.6 11.5 13.3 12.9 13.1 13.0 12.4 12.7 8 13.7 11.4 12.2 13.2 11.8 12.4 14.2 13.0 13.6 13.7 13.2 13~76 9 12.4 11.2 11.8 12.3 11.7 12.0 14.6 13.6 14.0 13-7 13.3 13.6 10 12.2 11.2 11.6 12.3 12.1 12.2 14.3 13.5 13.9 13.8 13.4 13.7 11 12.3 11.0 11.6 12.6 11.9 12.2 14.6 13.9 14.3 13-7 13.1 13.5 12 11.4 10.6 11.1 13.0 12.3 12.5 14.7 14.5 14.6 13.6 13.4 13.5 13 11.1 10.0 10.6 13.4 12.9 13.2 14.9 13.5 14.2 13.5 13.3 13.4 14 10.6 10.0 10.3 14.0 12.6 13.3 14.6 13.2 14.1 13.1 13.0 13.3 15 10.9 9.7 10.3 13.2 12.8 12.9 15.1 14.5 14.8 13.2 13.0 13.1 16 10.4 9-2 9-7 13.7 13.1 13.4 15.3 14.8 15.2 13.1 12.9 13.0 17 9-8 9.2 9-5 13.7 12.1 12.7 15.1 14.4 14.9 13.0 12.9 13.0 18 10.2 9-0 9-7 12.9 12.6 12.8 15.6 14.9 15.3 13.0 12.9 13.0 19 10.1 9.6 9.9 12.7 11.8 12.2 15.4 14.8 15.1 13.1 12.2 12.8 20 10.3 8.8 9.8 12.1 11.8 12.0 15.1 14.1 14.8 12.4 12.2 12.3 21 12.6 12.1 12.4 15.0 14.0 14.4 12.8 12.0 12.6 22 12.6 12.0 12.3 14.6 14.2 14.5 12.7 12.3 12.6 23 12.6 12.1 12.4 14.7 14.5 14.6 12.7 12.2 12.5 24 12.7 12.2 12.5 14.9 13.9 14.4 12.9 12.5 12.7 25 12.9 12.3 12.6 14.6 14.2 14.5 13.0 12.6 12.8 26 13.2 12.8 13.0 14.7 14.5 14.6 13.2 12.5 13.0 27 13.9 13.6 13.7 13.0 11.7 12.4 14.7 12.8 13.5 13.0 12.8 12.9 28 13.6 13.3 13.4 12.5 12.0 12.3 13-3 12.7 13.0 12.5 12.2 12.4 29 14.0 12.2 13.4 13.0 12.5 12.7 13-1 12.4 12.8 12.3 12.0 12.2 30 13.8 13.2 13.5 13.2 12.9 13.1 13.0 12.5 12.7 12.0 11.3 11.9 31 13.4 12.3 12.8 13.0 12.1 12.6 12.1 11.6 11.8 MONTH 15.6 9-3 13.9

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN .FEBRUARY MARCH APRIL MAY 1 11.8 11.7 11.8 12.4 12.0 12.2 13-2 11.8 12.7 2 11.7 11.7 11.7 13.7 12.0 12.9 12.4 11.2 12.0 3 11.7 11.6 11.7 13.8 12.9 13.5 4 11.8 11.6 11.7 14.0 13.0 13.5 5 11.9 11.8 11.9 14.3 13.7 14.0 6 12.0 11.6 11.8 14.1 13.7 13.9 13.9 9.0 11.6 10.4 9.7 10.1 7 11.7 11.1 11.4 14.2 13.7 14.0 14.0 6.9 11.6 10.3 10.0 10.2 8 11.7 11.0 11.3 14.3 13.0 13.8 13.2 11.0 12.4 10.4 10.0 10.2 9 12.0 11.1 11.9 13.9 12.9 13.7 13.2 11.9 12.7 10.4 10.0 10.2 10 12.1 11.7 11.9 14.0 12.8 13.5 10.3 9.8 10.1 11 11.9 11.2 11.7 14.8 13.0 13.9 13.2 12.1 12.6 10.1 8.9 9.7 12 11.9 11.1 11.7 15.0 13.0 14.1 13.1 12.2 12.9 9.2 8.8 9.0 13 11.8 11.1 11.6 15.2 13.2 14.3 13.2 12.2 12.8 10.0 8.3 9.1 14 11.7 10.9 11.3 16.3 14.1 14.8 13.1 12.3 12.9 9.2 8.8 9.0 15 11.2 10.9 11.0 15.2 12.0 13.4 13.6 12.8 13.1 9.2 8.8 9.0 16 11.7 10.9 11.2 14.2 11.8 12.8 14.4 12.1 12.8 9.2 8.2 8.9 17 13.0 11.0 12.0 14.3 12.1 13.0 14.0 12.1 12.8 9.1 8.3 8.8 18 13.2 12.3 12.9 13.9 10.9 12.6 13.9 12.9 13.4 9.2 8.0 8.6 19 13.2 11.7 12.3 11.7 10.2 11.0 13.6 12.2 13.0 9.0 8.1 8.5 20 12.0 11.1 11.7 10.4 9-6 10.0 13.1 11.7 12.3 9.2 8.1 8.7 21 12.1 11.7 11.9 10.1 8.2 9.3 12.2 11.5 11.9 9.2 8.8 9.0 22 13.0 12.1 12.5 11.8 11.5 11.6 9.1 8.8 9.0 23 13.6 12.1 12.6 14.2 12.2 13.1 12.1 11.3 11.6 9.2 8.0 8.5 24 12.4 12.0 12.2 12.3 11.7 12.1 11.4 10.9 11.2 9.1 8.1 8.4 25 12.4 11.9 12.2 12.2 10.9 11.5 12.1 10.6 10.9 8.4 8.1 8.2 26 12.4 12.0 12.2 12.4 10.0 11.3 11.5 10.4 10.9 27 12.4 12.0 12.2 12.4 9-7 10.8 12.0 10.6 11.3 28 12.4 12.1 12.2 12.6 12.1 12.3 29 12.7 10.6 11.4 10.1 8T9 9^6 30 12.6 11.5 12.2 9.9 9.0 9.5 31 11.1 8.8 9.5 MONTH 13.6 10.9 11.9 87 MISSISSIPPI RIVER MAIM STEM

05288550 MISSISSIPPI RIVER AT FRIDLEY, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 11.1 10.0 10.4 8.4 6.3 7.5 6.9 4.9 6.1 11.5 8.6 9.7 2 12.2 10.1 11.1 7.7 6.2 6.8 10.3 4.8 7-7 12.1 7.5 9.6 3 11.2 10.0 10.6 7.2 6.0 6.6 8.2 7.6 7-9 12.0 8.4 9-7 4 11.1 10.0 10.4 8.1 6.0 6.6 10.1 6.9 8.5 11.0 7-5 9-0 5 10.2 8.9 9.7 6.9 5.6 6.1 11.0 6.8 8.5 8.5 6.7 7.4 6 9.7 8.1 8.8 6.1 4.9 5.4 9.6 6.9 8.0 8.5 6.0 7-0 7 9.7 8.3 8.9 5.9 4.8 5-2 8.3 6.2 7.1 11.4 5.5 8.4 8 11.8 8.0 8.9 8.0 4.3 6.1 10.2 5.2 7.5 10.6 8.4 9.4 9 10.4 9.1 9-9 8.3 6.2 7.2 10.1 8.0 8.8 12.1 8.0 9-4 10 10.3 8.0 9.4 7.8 6.0 6.9 10.1 7.0 8.4 10.6 7.6 8.8 11 8.4 7.7 8.1 7.9 6.5 7-2 10.3 6.8 8.6 10.8 7.1 8.5 12 8.0 6.9 7.6 8.7 7.4 8.1 10.8 7-1 8.7 11.6 6.9 8.8 13 9.1 6.9 8.4 9.0 7.1 8.0 10.3 8.1 8.9 10.5 8.2 9.1 14 10.1 8.2 9.2 9.1 7.0 7.8 11.1 7.0 8.6 10.6 8.9 9.8 15 10.3 8.8 9.7 9.0 6.9 7.8 10.9 6.9 8.3 10.4 9.0 9.6 16 9.7 8.8 9.1 8.5 7.4 8.1 9.2 6.3 7.6 10.5 9.0 9-6 17 9.7 8.1 8.8 8.6 7.2 7.9 9.1 6.1 7.3 9.6 9-1 9.3 18 10.0 7.8 8.8 10.2 7.4 8.7 11.0 7-8 8.9 10.0 8.4 9-0 19 9.2 8.2 8.9 10.5 7-7 9.1 11.1 8.1 9.2 10.4 8.2 9.4 20 8.3 8.1 8.2 9.8 7-8 8.8 9.8 6.6 8.2 11.0 9-0 9-8 21 —— —— —— 8.9 7.7 8.2 9.2 6.7 7.6 10.7 8.1 9-9 22 9.2 8.1 8.8 10.3 7.1 8.2 11.1 6.2 8.5 10.9 8.4 9-7 23 9.3 8.3 8.7 10.1 8.3 8.9 11.2 7.9 9.2 10.9 9.2 9.4 24 8.7 6.8 7.6 9-6 8.1 8.8 10.4 8.2 8.7 10.2 9.0 9.5 25 8.1 7.0 7.6 8.9 7.4 8.2 10.8 8.3 9.2 11.0 9-0 9.7 26 8.8 7.5 8.0 9.2 7.1 8.4 10.8 7-9 9.0 10.9 8.8 9.6 27 9.1 7.8 8.5 10.2 7.9 9.4 10.6 7.8 8.8 9.3 9.0 9.1 28 10.1 8.6 9.3 10.2 7.9 8.7 10.3 7-9 8.8 11.6 10.5 11.0 29 10.2 8.8 9.5 11.0 7.0 8.9 9.6 7.3 8.3 11.1 8.8 9.9 30 9.2 7.7 8.3 9.9 7.1 8.5 11.1 8.4 9.5 12.0 8.7 10.0 31 —— —— —— 8.3 6.1 7.2 12.9 8.1 10.1 —— —— —— MONTH 11.0 4.3 7.7 12.9 4.8 8.4 12.1 5-5 9.3 °° MISSISSIPPI RIVER BASIN 05288840 BASSETT CREEK IN GOLDEN VALLEY, MN LOCATION.—Lat 45°00'01", long 93°19'39", in SWJNWJ sec.17, T.113 N., R.24 W. , Hennepia County, Hydrologic Unit 07010206, on right upstream headwall of culvert on County Road 66 (Golden Valley Road), 0.45 mi (0.72 km) northeast from outlet of Sweeney Lake, in Golden Valley. DRAINAGE AREA.—31.7 mi 2 (82.1 km 2 ). PERIOD OP RECORD.—January to December 1980 (published in OFR 82-504), May 1981 to current year (no winter record). GAGE.—Water-stage recorder. REMARKS.—Records fair except those for period of no gage height record, Oct. 22 to Dec. 4, which are poor. EXTREMES FOR PERIOD OP RECORD.--Maximum discharge, 274 ft3/ s (7.76 m3/ s ) June 14, 1981, gage height, 6.43 ft (1.960 m), from floodmarks; minimum, 2.2 ftVs (0.062 mVs) Sept. 20-21, 1981, gage height, 3.36 ft (1.024 m). EXTREMES FOR CURRENT YEAR.—Maximum discharge, 145 ftVs (4.11 m3 / s ) Sept. 10, gage height, 5.44 ft (1.658 m); minimum recorded discharge, 3.4 ftVs (0.096 rrP/s) Aug. 14, 15, but may have been less during winter period; minimum gage height, 3.40 ft (1.036 m) Aug. 21.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAH OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT MOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 11 6.7 7.0 130 21 23 9.0 4.7 24 2 5.9 6.3 7-0 140 19 20 8.7 6.6 9.7 3 12 6.3 6.8 140 21 19 8.4 6.6 7.7 4 22 6.3 6.6 140 25 19 8.1 7.2 5.8 5 15 6.2 —— 135 28 16 7.8 6-9 10 6 13 6.0 _ _ 130 22 14 16 6.6 6.8 7 10 6.0 —— 120 20 15 8.7 6.9 6.2 8 8.5 6.4 —— 110 18 16 7.5 5.8 6.4 9 8.7 6.2 —— 100 40 16 7.5 5.5 8.2 10 8.9 5.8 —— 85 26 15 46 4.3 83 11 6.5 5.4 _ _ 75 24 13 14 4.5 30 12 6.0 5.4 —— 68 35 12 10 4.7 17 13 6.4 6.5 —— 60 39 10 10 5.5 13 14 11 7.0 —— 55 47 14 12 4.3 10 15 6.7 6.5 —— 50 42 12 12 4.0 16 16 6.6 6.0 __ 46 56 9-9 11 13 11 17 26 6.5 — _ 43 67 9.8 9-3 12 10 18 16 6.2 —— 42 72 9.2 8.6 10 9.0 19 11 6.6 —— 44 54 8.9 8.0 9.0 8.0 20 7.6 7.0 —— 55 46 9.7 6.9 7.8 7.0 21 6.5 6.7 ___ 48 42 8.7 7-2 5.4 6.0 22 7.0 6.4 —— 44 37 9.0 6.6 5.6 5.6 23 7.0 6.4 ___ 39 33 9.3 7.2 6.0 5.6 24 6.8 6.6 —— 34 30 29 7-5 24 5.8 25 7.5 7.0 —— 29 29 15 8.1 10 5.8 26 7.4 7-4 _ _ 27 28 10 14 11 5.6 27 7.3 7.2 — _ 27 32 9.3 9-0 11 5.4 28 7.0 6.8 —— 26 28 11 7-5 6.0 5.6 29 7.2 6.6 —— 26 28 17 7.2 28 6.0 30 7-2 6.8 —— 100 24 26 9.3 6.6 13 6.0 31 7.0 —— —— 120 — - 29 —— 5.8 10 —— TOTAL 296.7 193-2 _ _ 2092 1064 409.1 316.2 265.9 356.2 MEAN 9.57 6.44 —— 69.7 34.3 13.6 10.2 8.58 11.9 MAX 26 7.4 —— 140 72 29 46 28 83 MIN 5.9 5.4 —— 24 18 8.7 5.8 4.0 5.4 CPSM .30 .20 —— 2.20 1.08 .43 .32 .27 .38 IN. .35 .23 —— 2.45 1.25 .48 .37 .31 .42 AC-PT 589 383 —— 4150 2110 811 627 527 707 MISSISSIPPI RIVER MAIN STEM 05288950 MISSISSIPPI RIVER AT PORD PLANT AT ST. PAUL, MN LOCATION.—Lat 44°54'57", long 93°11'59", in NE^NWJ sec.17, T.28 N., R.23 W. , Ramsey County, Hydrologic Unit 07010206, Pord Motor Company hydroelectric plant, 800 ft (244 m) downstream from Ford Parkway bridge, 3-5 mi (5-6 km) upstream from Minnesota River at mile 847.6 (1,363-3 km) upstream from the Ohio River. DRAINAGE AREA.—19,700 mi 2 (51,000 km 2 ). PERIOD OP RECORD.—Water years 1974-78, October 1980 to September 1982 (discontinued). PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE: November 1973 to September 1978, October 1980 to September 1982. pH: November 1973 to September 1978, October 1980 to September 1982. WATER TEMPERATURES: November 1973 to September 1978, October 1980 to September 1982. DISSOLVED OXYGEN: November 1973 to September 1978, October 1980 to September 1982. INSTRUMENTATION.—Water-quality monitor from November 1973 to September 1978, October 1980 to September 1982. REMARKS.--Extremes are published for years with 80 percent or more daily record. COOPERATION.—Water-quality monitor operated by the Metropolitan Waste Control Commission, St. Paul, MN. EXTREMES FOR PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE (water year 1981): Maximum, 454 micromhos July 14, 1981; minimum, 282 micromhos May 5, 1981. pH (water year 1981-82): Maximum, 8.5 units Mar. 13-15, 19, Apr. 17, 18, 21, May 21, 22, June 1, 5-7, 1981; minimum, 7-2 units Oct. 18, 1981. WATER TEMPEATURES (water year 1981-82): Maximum, 27.0°C July 19-21, 1981; minimum, 0.0°C several days during winter period. DISSOLVED OXYGEN (water year 1981-82): Maximum, 17-4 mg/L Mar. 23, 1981; minimum, 4.0 mg/L July 5, 1982. EXTREMES FOR CURRENT YEAR.— pH: Maximum, 8.4 units July 29, Aug. 11, Sept. 1, 3-8; minimum, 7.2 units Oct. 18. WATER TEMPERATURES: Maximum, 25.5°C Aug. 4-7; minimum, 0.0°C several days during winter. DISSOLVED OXYGEN: Maximum, 15-0 mg/L Dec. 17; minimum, 4.0 mg/L July 5.

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX WIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 435 428 432 2 437 435 436 3 439 400 426 4 428 418 423 5 427 418 423 6 ______7 —— —— —— 9 —— ___ 10 —— —— —— 11 ______12 —— —— —— 13 —— —— _ — 14 — _ —— —— 15 —— —— —— 16 ______17 —— —— 18 —— —— 19 —— —— —— 20 —— —— —— 21 ______22 —— — _ —— 23 —— —— —— 24 —— —— —— 25 —— —— —— 26 ______391 382 388 27 —— —— 395 380 385 28 —— —— —— 396 390 392 29 —— —— —— 394 382 388 30 —— —— —— 391 388 389 31 —— —— —— 389 382 386 RIVER MAIN STEM

05288950 MISSISSIPPI RIVER AT PORD PLANT AT ST. PAUL, MN—Continued

SPECIFIC CONDUCTANCE (MICROPROS/CM AT 25 DEI?. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

FEBRUARY MARCH APRIL MAY 1 388 381 383 391 385 386 378 345 362 260 242 257 2 389 382 385 387 380 382 348 321 336 261 254 258 3 391 383 388 384 380 380 401 302 312 263 254 260 4 390 332 385 384 381 383 394 294 301 346 258 263 5 393 389 390 388 384 386 299 290 292 266 257 262 6 392 382 388 390 384 386 340 287 290 264 257 260 7 391 388 390 387 380 384 291 276 284 269 258 262 8 397 389 393 390 384 386 300 265 271 271 267 269 9 394 389 391 429 386 388 267 260 264 274 264 271 10 396 391 392 448 391 399 269 265 267 274 253 264 11 397 390 393 444 387 402 274 268 271 274 250 264 12 397 390 394 415 376 384 278 272 275 281 262 275 13 397 391 395 407 389 395 281 273 277 283 269 280 14 397 390 395 436 386 389 284 268 279 285 279 282 15 397 390 395 388 382 384 284 272 280 284 258 281 16 397 391 394 400 368 3^0 281 269 275 281 273 278 17 420 382 401 419 387 398 277 260 264 287 278 282 18 387 381 385 390 384 385 —— —— —— 288 279 283 19 392 381 386 385 379 381 280 233 239 284 276 280 20 418 381 404 394 376 380 243 229 232 277 273 274 21 483 401 426 397 382 389 265 229 233 273 265 269 22 437 403 417 395 386 392 238 232 235 283 262 266 23 427 392 412 394 378 382 243 235 242 284 262 265 24 401 384 390 388 380 384 244 239 242 277 262 267 25 398 382 390 380 376 378 244 235 242 283 272 277 26 394 380 385 376 370 373 243 233 241 292 280 285 27 388 380 382 382 372 377 254 240 247 300 290 293 28 384 384 384 392 379 386 258 250 254 303 300 301 29 —- —— —— 445 391 397 258 254 254 308 300 301 30 —— —— —— 403 395 399 258 254 257 311 300 307 31 _.. .__ —— —— —— —— —— —— —— 311 300 307

MONTH 483 380 393 448 368 387 346 242 276

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER 1 309 300 306 346 341 344 353 343 347 355 347 351 2 311 306 309 347 344 345 349 342 345 357 350 354 3 315 308 313 349 343 347 359 342 344 361 352 356 4 316 309 313 349 342 346 349 342 346 357 351 353 5 316 307 313 349 345 346 356 349 351 361 353 356 6 317 308 315 375 347 352 360 353 355 360 353 357 7 323 312 318 351 341 345 357 349 352 366 357 362 8 325 317 321 342 338 340 353 345 350 376 364 371 9 323 315 318 345 338 341 349 346 347 376 371 373 10 332 315 326 348 323 338 354 345 349 374 319 350 11 346 322 341 352 337 344 349 345 347 361 328 349 12 3^8 322 342 346 334 338 352 342 3*1 365 356 360 13 3^3 315 340 346 338 342 348 342 345 368 361 365 14 349 325 342 348 344 346 354 343 345 377 369 374 15 354 345 351 354 330 347 350 344 348 376 362 366 16 363 353 357 355 351 353 353 337 350 365 357 360 17 368 341 363 357 353 354 372 335 3^9 376 362 371 18 366 341 363 357 347 355 360 352 356 376 373 374 19 361 336 358 359 354 355 359 349 354 382 375 377 20 361 343 351 360 353 356 353 349 351 381 378 379 21 366 347 351 355 348 350 355 349 352 378 371 374 22 —— —— —— 351 348 350 358 351 354 376 371 373 23 369 365 367 354 349 351 358 350 353 374 370 372 24 365 351 357 358 351 352 356 347 352 379 373 375 25 419 358 362 357 353 355 353 339 347 379 372 375 26 354 341 345 357 345 351 357 353 355 379 373 376 27 347 342 345 351 347 349 357 349 353 379 371 374 28 352 340 344 352 346 349 354 348 351 374 364 368 29 347 342 344 357 348 350 356 326 344 366 360 362 30 347 340 342 360 353 356 349 332 342 366 362 363 31 —— —— —— 358 349 353 354 346 350 MONTH 375 323 348 372 326 349, 382 319 366 91 MISSISSIPPI RIVER MAIN STEM 05288950 MISSISSIPPI RIVER AT FORD PLANT AT ST. PAUL, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 8.1 8.0 8.1 7.7 7.6 7.6 7.9 7.9 7.9 2 8.2 8.0 8.1 7.7 7.6 7.7 7.9 7.8 7.9 3 8.1 8.0 8.1 7.7 7.6 7.7 7.9 7-8 7.9 4 8.0 3.0 8.0 7.7 7.6 7.7 7.9 7.9 7.9 5 8.0 7-9 7.9 7.7 7.6 7.7 7.9 7.9 7.9 7.6 7.4 7.5 6 7.9 7.8 7.9 7.7 7.6 7.7 7.9 7-9 7-9 7.7 7.6 7.6 7 8.0 7.8 7.9 7.7 7.6 7-7 7.9 7.9 7.9 7.6 7.5 7.6 8 8.0 7.9 8.0 7.8 7.7 7.7 7.9 7.8 7-9 7.5 7.5 7.5 9 8.0 7.9 8.0 7.8 7.6 7.7 7.9 7.8 7.9 7.5 7.5 7.5 10 7.9 7.9 7.9 7.8 7.7 7.7 7.9 7.8 7.8 7.6 7.5 7.5 11 7.9 7.8 7.9 7.8 7.7 7.8 7.9 7.8 7.8 7.5 7.5 7.5 12 8.0 7.9 7-9 7.8 7.8 7.8 7.9 7.8 7.8 7.5 7.5 7.5 13 7.9 7.8 7.8 7.8 7.8 7.8 7.9 7.8 7.8 7.6 7.4 7.5 14 7.8 7-3 7.5 7.8 7.8 7.8 7.8 7.8 7.8 7.5 7.4 7.5 15 7.4 7.3 7.3 7.8 7.8 7.8 7.8 7.8 7.8 7.5 7.4 7.4 16 7.8 7.3 7.5 7.8 7-7 7.8 7.8 7.8 7.8 7.5 7.4 7.4 17 7-4 7.3 7.3 7.8 7-7 7.8 7.8 7.8 7.8 7.4 7.4 '7.4 18 7.3 7.2 7.3 7.8 7.8 7.8 7.8 7.8 7.8 7.5 7-4 7-5 19 7.4 7.3 7.3 7.8 7.7 7.8 7.8 7.7 7.8 7.5 7.4 7.5 20 7.8 7.3 7.4 7-9 7.8 7.8 7.8 7.7 7.7 7.5 7.4 7.4 21 7.3 7.3 7.3 7.9 7.8 7.8 7.7 7.6 7.7 7.5 7.4 7.4 22 7.3 7.3 7-3 7.9 7-9 7.9 7.7 7.6 7.6 7.5 7.4 7.4 23 7.4 7.3 7.3 7.9 7.8 7.9 7.6 7-6 7.6 7.6 7.4 7.5 24 7.3 7.3 7-3 7.9 7.8 7.9 7.6 7.6 7.6 7.6 7.5 7.6 25 7.3 7.3 7.3 7.8 7.8 7.8 7.6 7.5 7.6 7.6 7.5 7.5 26 7.4 7.3 7.3 7.8 7.8 7.8 7.6 7.5 7.5 7.5 7.5 7.5 27 7.4 7.3 7.3 7.9 7-8 7.8 7.5 7.5 7.5 7.5 7.5 7.5 28 7.4 7.3 7.3 7.9 7.8 7.8 7.6 7.4 7.6 29 7.4 7.3 7.3 7.9 7.8 7.8 7.7 7.6 7.6 30 7.4 7.3 7.3 7-9 7.9 7-9 7.6 7.5 7.6 31 7.3 7.3 7.3 7.6 7.5 7.5 MONTH i.2 7.2 7.6 7.9 7.6 7.8 7.9 7.4

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

FEBRUARY MARCH APRIL MAY

7.9 7.8 7.9 7.7 7.6 7.6 7.7 7.6 7.7 8.0 7.6 7.6 7.9 7.8 7.9 7.6 7.6 7.6 7.8 7.6 7.7 7.7 7.6 7.6 8.0 7.9 8.0 7.7 7.6 7.6 7.7 7.6 7.7 7.6 7-6 7.6 8.0 8.0 8.0 7.7 7.6 7.6 7.8 7.6 7.7 7.7 7.6 7.6 8.0 8.0 8.0 7.6 7.5 7.5 7.7 7.6 7.6 7.6 7.6 7.6 8.1 8.0 8.0 7.6 7.5 7.5 7.7 7.6 7.6 7.7 7.6 7.6 8.1 7.9 8.0 7.5 7.5 7.5 7.7 7.6 7.6 7.7 7.6 7.7 8.1 8.0 8.0 7.6 7.4 7.5 7.7 7.6 7.6 7.7 7.6 7.7 8.1 8.0 8.0 7.5 7.4 7.4 7.8 7.6 7.7 10 7.7 7.6 7.7 8.1 8.0 8.1 7.5 7.5 7.5 7.8 7.6 7.7 11 7.7 7.6 7.7 8.1 8.0 8.0 7.8 7.6 7.7 12 7.7 7.6 7.7 8.1 8.0 8.0 7.9 7.5 7-5 7.7 7.6 7.7 13 7.7 7.6 7.7 8.1 8.0 8.0 7.6 7.5 7.5 7.7 7.6 7.6 14 7.7 7.6 7.7 8.1 8.0 8.0 7.6 7.5 7.6 7.7 7.6 7.7 15 7.8 7.7 7.7 8.2 7.9 8.1 7.7 7.6 7.7 16 7.8 7.7 7.8 8.0 7.8 7.9 7.6 7.5 7.6 7.7 7.6 7.6 17 7.8 7.7 7.8 7.9 7.8 7.9 7.6 7.5 7.6 7.7 7.6 7.7 18 7.8 7.8 7.8 8.0 7.9 7.9 7.6 7.6 7.6 7.7 7.6 7.7 19 7.8 7.7 7.8 8.0 7.8 7.9 7.8 7.5 7.6 7.7 7.6 7.7 20 7.8 7.8 7.8 8.0 7-8 7.9 7.6 7.6 7.6 21 8.0 7.8 7.9 7.9 7.8 7.9 7.6 7.6 7.6 22 8.0 7.8 7.9 8.0 7.9 7.9 7.6 7.6 7.6 23 8.0 7.9 8.0 8.0 7.9 7.9 7.7 7.6 7.6 24 8.1 7.9 8.0 7.9 7.8 7.9 7.8 7.6 7.7 7.6 7.6 7.6 25 8.1 8.0 8.1 7.9 7.8 7.8 7.8 7.6 7.8 7.6 7.6 7.6 26 8.1 8.0 8.1 7.9 7.8 7.8 7.8 7.6 7.8 7-6 7.6 7.6 27 8.1 7.9 8.1 8.0 7.8 7.8 7.7 7.8 7.6 7.6 7.6 28 8.0 8.0 8.0 7.8 7.7 7.8 7.7 7.7 7.6 7.6 7.6 29 7.8 7.7 7.7 7.7 7.7 7.6 7.6 7.6 30 7.7 7.6 7.7 7.7 7.7 7.7 7.7 7.6 7.6 31 7.7 7.6 7.7 MONTH 8.2 7.6 7.9 7.6 7.7 92 MISSISSIPPI RIVER MAIN STEM 05288950 MISSISSIPPI RIVER AT FORD PLANT AT ST. PAUL, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 7.7 7.6 7.7 8.3 8.1 8.2 8.3 8.2 8.2 8.4 8.1 8.2 2 7.8 7.7 7.7 8.3 8.1 8.2 8.3 8.1 8.2 8.3 8.0 8.2 3 7.8 7.6 7.8 8.2 8.1 8.2 8.2 8.1 8.2 8.4 8.0 8.2 4 7.9 7.8 7.8 8.3 8.1 8.2 8.3 8.1 8.2 8.4 8.0 8.2 5 7.9 7.8 7.8 8.3 8.1 8.2 8.3 8.0 8.1 8.4 8.1 8.3 6 7.9 7.3 7.8 8.2 8.1 8.2 8.3 8.0 8.1 8.4 8.2 8.3 7 7.9 7.8 7.8 8.2 8.0 8.1 8.2 8.0 8.1 8.4 8.2 8.3 8 7.9 7.8 7.8 8.1 7-9 8.0 8.2 8.0 8.1 8.4 8.0 8.2 9 7.9 7.8 7.8 8.0 7.9 8.0 8.2 8.0 8.1 8.3 8.0 8.2 10 7.9 7.8 7.9 8.0 7.7 7.8 8.1 8.0 8.1 8.2 7.8 8.0 11 8.1 7.9 8.0 7.9 7.7 7.8 8.4 8.0 8.1; 8.2 7.3 7.8 12 8.1 7.9 8.0 7-9 7-7 7.8 8.2 8.0 8.1 8.1 7.8 7.9 13 8.1 7.9 8.0 7.9 7.8 7.9 8.3 8.0 8.0 8.1 7.8 7.9 lit 8.0 7.9 8.0 8.0 7.8 7.9 8.3 8.0 8.1 7.8 7.6 7.7 15 8.0 7.9 8.0 7.9 7.8 7.9 8.3 8.0 8.1 7.6 7.5 7.6 16 8.2 8.0 8.1 7.9 7.8 7.8 8.3 8.0 8.2 7.7 7.5 7.6 17 8.2 8.0 8.1 7-9 7.8 7.8 8.3 8.0 8.2 7.9 7.6 7.7 18 8.1 8.0 8.1 8.0 7.8 7.9 8.3 8.0 8.1 7.8 7.7 7.7 19 8.1 8.0 8.0 8.1 7.9 8.0 8.3 8.0 8.2 7.8 7.7 7.7 20 8.0 7.9 7.9 8.1 8.0 8.1 8.3 8.0 8.1 7.8 7.7 7.8 21 8.0 7.9 7.9 8.1 8.0 8.0 8.3 8.0 8.2 7.9 7.8 7.9 22 8.1 7.9 8.0 8.0 7.9 8.0 8.3 8.0 8.2 7.9 7.8 7.8 23 8.1 8.0 8.1 8.1 7.9 8.0 8.3 8.0 8.2 8.0 7.8 7.9 24 8.1 7-9 8.0 8.1 8.0 8.0 8.3 8.1 8.2 8.0 7.8 7.9 25 8.1 8.0 8.1 8.0 7.8 7.9 8.3 8.0 8.2 8.0 7.8 7.9 26 8.2 8.0 8.1 7.9 7.8 7.9 8.3 8.0 8.2 8.1 7.8 7.9 27 8.2 8.0 8.1 8.1 7.9 8.0 8.3 8.0 8.2 8.1 7.8 8.0 28 8.3 8.0 8.2 8.1 8.0 8.1 8.2 8.0 8.1 8.1 8.0 8.0 29 8.3 8.0 8.2 8.4 8.0 8.2 8.3 7.9 8.1 30 8.2 8.0 8.1 8.3 8.0 8.2 8.3 7.9 8.1 31 —— —— —— 8.3 8.2 8.2 8.3 8.1 8.2 MONTH 7.6 8.0 8.4 7-7 8.0 8.4 7.9 8.2 TEMPERATURE, WATER (DEG. G), WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 12.0 11.0 11.5 6.0 5.5 6.0 1.0 .5 1.0 2 11.5 11.0 11.0 6.0 5.5 5.5 1.0 .5 1.0 3 11.0 10.0 10.5 6.0 5.5 5-5 1.0 .5 1.0 4 10.0 10.0 10.0 6.0 5.5 5.5 1.0 .5 .5 5 10.5 10.0 10.5 6.0 5.5 6.0 .5 .5 .5 .5 6 11.5 10.5 11.0 5.5 5.5 5.5 .5 .5 .5 .5 7 11.5 11.0 11.5 5.5 5.5 5.5 .5 .5 .5 .5 8 11.0 10.5 11.0 5.5 5.0 5.5 .5 .5 .5 .5 9 11.0 10.5 11.0 5.0 4.5 5.0 .5 .5 .5 .0 10 10.5 10.5 10.5 4.5 4.5 4.5 .5 .5 .5 .5 11 11.0 10.5 10.5 4.5 4.5 4.5 .5 .5 .5 .5 12 11.0 11.0 11.0 4.5 4.0 4.5 .5 .5 .5 .5 13 11.0 10.5 10.5 5.0 4.5 4.5 .5 .5 .5 .5 14 11.0 9.0 11.0 5.0 4.5 5.0 .5 .5 .5 15 11.0 9.0 10.5 5.5 5.0 5.5 .5 .5 .5 16 11.0 9.0 10.0 5.5 4.0 5.0 .5 .5 .5 17 9.0 9.0 9.0 5.0 5.0 5.0 .5 .5 .5 18 10.5 8.5 10.0 5.0 4.0 4.5 .5 .5 .5 19 9.5 9.0 9.0 4.0 3.5 4.0 .5 .5 .5 20 9-0 9-0 9.0 5.0 2.5 3.0 .5 .5 •5 21 9.0 7.0 8.5 2.5 2.0 2.5 .5 .5 .5 22 6.0 5.5 6.0 2.0 1.5 1.5 .5 .5 .5 23 5.5 4.5 5.0 4.0 1.5 1.5 .5 .5 .5 24 6.5 4.5 5.0 1.5 1.0 1.0 .5 .5 .5 25 5.5 5.0 5.5 1.0 1.0 1.0 .5 .5 .5 26 5.5 4.5 4.5 1.5 1.0 1.5 .5 .5 .5 27 4.5 4.5 4.5 1.5 1.0 1.0 .5 .5 .5 28 4.5 4.5 4.5 1.0 1.0 1.0 .5 .5 .5 29 5.0 4.5 5.0 1.0 1.0 1.0 .5 .0 .5 30 6.0 5.0 5.5 1.0 1.0 1.0 .5 .0 .5 31 6.0 6.0 6.0 .5 .0 .5 MONTH 12.0 6.0 1.0 4.0 1.0 93 MISSISSIPPI RIVER MAIN STEM 05288950 MISSISSIPPI RIVER AT PORD PLANT AT ST. PAUL, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY .5 .5 .5 1.5 1.5 1.5 3-0 2.5 2.5 12.5 12.0 12.0 .5 .5 .5 1.5 1.0 1.5 2.5 2.5 2.5 13.0 12.0 13.0 .5 .5 .5 1.5 1.0 1.0 2.5 1.5 2.0 13.5 12.0 13.0 .5 .5 .5 1.0 1.0 1.0 2.5 1.0 1.5 14.0 13-5 13.5 .5 .5 .5 1.5 1.0 1.0 1.5 1.5 1.5 14.0 12.0 13.5 6 .5 .5 .5 1.5 .5 1.0 2.5 1.5 1.5 13.5 12.5 13.0 7 1.0 .5 .5 1.0 .5 1.0 1.5 1.5 1.5 13.0 12.5 12.5 8 1.0 .5 .5 1.0 .5 .5 1.5 1.5 1.5 13.0 12.5 13.0 9 .5 .5 .5 .5 .5 • 5 1.5 1.5 1.5 13.5 13.0 13.0 10 .5 .5 .5 1.0 .5 1.0 1.5 1.5 1.5 14.0 13.0 13-5 11 1.0 .5 .5 1.0 .5 1.0 3.0 1.5 2.0 16.5 13.0 15.0 12 1.0 .5 .5 1.5 .5 1.0 2.5 2.0 2,5 16.0 15.5 16.0 13 1.0 .5 1.0 2.0 1.5 2.0 3.0 2.0 2.5 15.5 15.0 15.5 11 1.0 .5 .5 2.5 1.0 2.0 3.5 1.5 3.0 16.5 15.5 16.0 15 1.0 .5 .5 2.5 2.0 2.5 4.5 1.5 4.0 16.5 16.0 16.0 16 .5 .5 .5 2.0 1.0 2.0 4.5 2.0 4.5 16.5 16.0 16.5 17 1.5 .0 1.0 2.5 1.5 2.0 4.5 2.5 4.0 16.5 16.5 16.5 18 1.5 1.0 1.0 2.5 2.0 2.5 4.5 4.0 4.0 16.5 16.5 16.5 19 1.0 1.0 1.0 3.0 2.0 2.5 4.5 4.0 4.5 16.5 16.0 16.5 20 1.5 1.0 1.0 2.0 1.0 1.5 4.5 4.0 4.0 16.5 16.5 16.5 21 1.5 1.0 1.0 1.5 1.0 1.5 5.5 5.0 5.0 16.5 16.0 16.0 22 1.5 1.0 1.0 2.5 1.5 2.0 6.0 5.5 6.0 16.0 16.0 16.0 23 1.5 1.0 1.0 3.0 2.5 2.5 13.0 6.0 9.5 16.5 16.0 16.0 24 1.5 1.0 1.0 3-0 2.5 3.0 9-0 8.0 8.5 16.5 16.0 16.5 25 1.5 1.0 1.0 3.0 2.0 2.5 10.0 7.5 10.0 17.0 16.5 16.5 26 1.5 1.0 1.5 2.0 1.5 2.0 11.0 8.5 11.0 27 1.5 1.0 1.5 2.5 2.0 2.0 12.0 11.5 12.0 28 1.5 1.5 1.5 2.5 1.5 2.0 12.0 11.5 12.0 29 2.5 2.0 2.5 12.0 12.0 12.0 30 '4.0 2.0 2.5 12.0 12.0 12.0 31 MONTH 1.5 .0 1.0 4.0 .5 1.5 13.0 1.0 5.0

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 17-5 16.5 17-5 22.5 21.5 22.0 24.0 23.0 23.5 19.5 18.5 18.5 2 17-5 17.0 17.0 22.5 22.0 22.0 24.0 23-5 24.0 19.0 18.5 19.0 3 17.5 17.0 17.0 23.0 20.0 22.5 24.5 23.5 24.0 19.5 18.5 19.0 it 18.5 17.0 17-5 23.5 22.0 23.0 25.5 24.0 24.5 20.5 18.5 19.0 5 18.5 17.5 18.5 24.0 23.5 24.0 25.5 24.5 25.0 19.0 18.5 18.5 6 18.5 17.0 18.0 24.0 23.0 23.5 25.5 25.0 25.0 18.5 18.0 18.5 7 18.0 17.0 18.0 24.5 22.0 24.0 25.5 24.5 25.0 18.5 18.0 18.0 8 18.5 18.0 18.0 23-5 23.0 23.5 24.5 24.0 24.5 18.0 17.5 17.5 9 18.5 18.0 18.5 24.0 23.0 23.0 24.0 22.5 23.0 18.0 17.0 17.5 10 18.0 17.5 18.0 23.5 22.5 23.0 22.5 22.0 22.5 18.5 17.5 18.0 11 18.5 17.5 18.0 23.5 22.0 22.0 22.5 21.5 22.0 19.5 18.0 18.5 12 19.0 18.0 18.5 23.0 22.0 22.5 24.5 21.5 21.5 20.0 19.0 19.5 13 19.0 18.5 18.5 23.5 23.0 23.0 23.0 21.5 21.5 19.5 19.0 19.0 lit 19.0 18.0 18.5 24.0 23.0 23-5 22.0 21.5 22.0 18.5 17.0 18.0 15 18.5 18.0 18.5 23.5 22.5 23.5 22.0 21.5 22.0 17.0 16.0 16.5 16 19.0 18.0 18.5 23.5 23.0 23.5 22.5 22.0 22.0 16.0 15.5 16.0 17 19.0 18.5 19.0 24.0 23, 23.5 23.5 21.5 23.0 16.0 15.5 16.0 18 19.0 18.5 19.0 24.0 23, 24.0 24.0 22.5 23.0 16.0 15.5 15.5 19 18.5 17.0 18.0 24.0 23- 23.5 24.0 23.0 23, 16.0 15.5 15.5 20 19.0 15.5 18.0 24.0 23, 24.0 24.0 23.0 23. 15.5 15.0 15.5 21 19.5 18.0 18.0 24, 23.5 24.0 24.0 23.0 23.5 15.5 14.5 14.5 22 24. 24.0 24.0 23.5 22.5 23.0 14.0 14.0 14.0 23 19.5 18.5 19.0 24, 23.5 24.5 23.5 22.5 22.5 14.0 13.5 14.0 24 19.5 19.0 19.0 24, 24.0 24.0 23.0 22.0 22.5 14.0 13.5 14.0 25 24, 23.5 24.0 22.5 22.0 22.0 14.0 13-5 14.0 26 19.5 19.0 19.5 24.0 23.5 23.5 22.5 21.5 22.0 13.5 13.5 13.5 27 21.0 19.5 20.5 23.5 23.5 23.5 22.0 21.0 21.5 13.5 13.0 13.5 28 22.0 20.0 21.5 23.5 23.5 23.5 21.0 20.5 20.5 14.5 13.5 13.5 29 22.5 21.5 22.0 24.5 23.5 24.0 20.5 20.0 19.5 14.5 14.0 14.0 30 22.5 19.5 22.0 24.0 23.5 19.5 18.5 19.0 15.0 14.5 14.5 31 24.0 23.5 19.5 18.0 19.0 MONTH 24.5 20.0 23.5 25.5 18.0 22.5 20.5 13.0 16.5 94 MISSISSIPPI RIVER MAIN STEM 05288950 MISSISSIPPI RIVER AT PORD PLANT AT ST. PAUL, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBIiR 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECE11BER JANUARY

1 9.9 8.1 8.7 12.2 11.8 12.0 14.1 13.6 13.8 2 10.6 8.3 9-5 12.7 11.7 12.2 14.0 13.3 13.8 3 10.7 10.0 10.3 12.4 12.0 12.3 13.8 13.5 13.6 4 10.0 8.7 9.4 12.0 10.3 11.4 13.9 13.5 13.7 5 10.6 8.3 9.2 10.4 10.0 10.2 14.0 13.7 13.8 12.8 12.6 12.7 6 10.6 8.8 10.0 10.4 10.0 10.2 13.8 13.5 13.6 13.1 12.8 13.0 7 11.7 10.0 10.4 10.4 10.0 10.2 13.7 13.3 13.5 13-0 12.7 12.7 8 11.7 10.3 10.6 10.8 10.0 10.3 13.6 13.1 13.4 12.7 12.5 12.6 9 10.8 10.0 10.4 12.7 10.1 11.6 13.9 13.1 13.3 13.4 12.5 12.8 10 10.7 10.0 10.4 12.8 12.0 12.4 13.7 13-4 13.6 14.0 12.9 13.3 11 10.8 10.0 10.4 12.6 12.3 12.4 14.8 13.3 14.1 13.6 12.6 12.9 12 12.3 10.1 11.1 12.3 11.9 12.1 14.0 13.5 13.8 13.8 10.2 12.7 13 10.8 10.0 10.3 12.1 10.8 11.7 13.7 13.5 13.6 13.6 12.5 12.7 14 10.8 10.0 10.4 11.7 10.5 10.7 14.2 13.5 13.7 15 10.8 10.1 10.5 11.2 10.8 11.0 13.7 13.4 13.5 13.9 12.2 13.2 16 10.7 9.8 10.4 12.2 10.7 11.5 14.9 13.3 13.5 17 9.8 8.3 9.2 12.0 11.6 11.8 15.0 13.5 14.1 14.1 11.6 12.9 18 9.9 8.2 9.0 11.8 11.4 11.6 14.4 13.5 13.7 19 10.5 9.8 10.1 12.0 11.4 11.7 13.7 13.5 13.6 14.3 12.7 13.3 20 11.7 10.0 10.7 13.5 11.7 12.6 13-7 13.5 13.6 12.9 12.7 12.8 21 11.6 10.4 10.7 13.4 13.0 13.1 13.5 13.0 13.2 13.2 12.7 12.9 22 11.9 10.6 11.4 13.6 13.3 13.4 13.1 12.8 13.0 13.2 12.8 13.0 23 12.6 11.8 12.2 14.0 11.5 13.6 13.2 13.0 13.0 14.0 12.8 13.0 24 12.6 12.3 12.4 14.0 13.5 13.6 13.6 13.0 13.2 14.3 13.0 13-3 25 12.8 12.0 12.2 13.5 13.3 13.4 13.1 13.0 13.0 13.2 13.0 13.1 26 12.6 12.0 12.3 13.3 13.0 13.1 13.0 12.9 12.9 13.2 13.0 13.1 27 13.8 12.1 12.8 13.2 13.0 13.1 12.9 12.7 12.8 13.1 12.6 12.8 28 12.7 12.1 12.4 13.8 13.2 13.5 13-3 12.7 13.0 12.8 12.0 12.3 29 12.7 12.0 12.5 13.8 13.5 13.6 13.5 13.3 13.4 12.8 12.0 12.1 30 12.5 12.0 12.2 14.2 13.4 13.8 13.3 13.0 13.2 12.8 12.0 12.2 31 12.3 11.9 12.0 13.4 12.8 13.0 12.3 12.0 12.2 MONTH 8.1 10.8 14.2 10.0 12.1 15.0 12.7 13.5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 12.3 12.0 12.1 12.8 12.7 12.7 12.6 12.0 12.3 10.7 10.1 10.5 2 12.7 12.0 12.3 13.3 12.9 13.1 12.7 12.0 12.2 10.5 9.9 10.3 3 12.8 12.4 12.7 13.3 13.2 13.2 12.7 12.0 12.4 10.5 9.7 10.0 4 12.8 12.4 12.6 13.6 13.3 13.4 14.1 12.6 13.5 9.9 8.1 8.9 5 13.6 12.6 12.8 13.5 13.3 13.4 14.5 12.6 14.1 8.6 8.1 8.4 6 13.6 12.6 12.8 13.5 13.3 13.4 14.7 14.2 14.5 8.6 8.2 8.4 7 12.7 12.4 12.5 13.7 13.3 13.5 14.5 13.9 14.2 8.8 8.0 8.4 8 13.8 12.6 13.0 14.1 13.4 13.7 14.3 13.8 14.0 8.8 8.0 8.3 9 13.8 12.3 12.8 13.8 13.4 13-5 14.3 13.8 14.0 8.7 8.0 8.4 10 12.7 12.0 12.3 14.3 13.4 13.8 14.1 13.6 13.9 10.0 8.0 8.6 11 12.8 12.0 12.4 14.0 13.6 13.7 14.3 12.6 13.8 8.5 8.0 8.3 12 12.8 12.0 12.4 13.7 12.6 13.1 13.7 12.2 12.8 8.7 8.0 8.3 13 12.8 12.1 12.4 13.5 12.5 12.7 12.7 12.0 12.4 8.7 8.2 8.5 14 12.3 12.1 12.3 13.8 12.6 12.9 12.7 12.1 12.3 8.8 8.0 8.3 15 12.8 12.0 12.5 13.1 12.6 12.9 12.5 12.0 12.3 8.8 8.0 8.3 16 12.8 12.1 12.6 13.4 12.5 12.7 12.1 11.6 11.9 8.6 8.0 8.4 17 12.8 12.1 12.5 13.2 12.6 13.0 12.7 12.0 12.2 8.6 7.8 8.2 18 12.8 12.0 12.6 12.9 12.4 12.7 12.5 11.8 12.2 8.8 8.0 8.4 19 12.8 12.0 12.5 12.6 12.2 12.4 12.7 10.7 12.1 8.8 8.0 8.2 20 12.7 12.0 12.5 12.8 12.3 12.6 12.7 10.6 12.1 8.8 8.0 8.3 21 12.7 12.2 12.5 13.1 12.7 12.9 12.7 12.0 12.4 8.6 8.0 8.3 22 12.8 12.0 12.5 12.9 12.7 12.8 12.7 12.0 12.4 8.8 8.0 8.2 23 12.8 12.2 12.5 13.9 12.6 13.3 12.3 11.8 12.0 8.8 8.0 8.4 24 12.7 12.2 12.5 12.7 12.2 12.5 11.9 10.3 11.4 8.7 8.0 8.4 25 12.8 12.1 12.4 13.8 12.2 13.0 10.7 10.1 10.4 9.6 8.0 8.4 26 12.2 12.0 12.1 14.4 13.6 13.9 10.7 10.0 10.3 8.5 8.0 8.3 27 12.8 12.0 12.4 14.2 13.6 13.9 10.7 9.8 10.3 8.5 8.0 8.3 28 12.3 12.2 12.3 14.1 13.6 13.8 10.7 9.8 10.3 8.8 8.0 8.3 29 —— —— —— 14.2 12.4 13.4 10.5 10.0 10.2 8.7 8.0 8.5 30 ___ —— —— 13-8 12.2 12.9 10.7 10.1 10.3 8.8 8.0 8.4 31 —— —— —— 13.6 12.0 12.3 8.7 8.0 8.4 MONTH 13.8 12.0 12.5 14.4 12.0 13.1 14.7 9.8 12.3 10.7 7.8 8.6 95 MISSISSIPPI: RIVER MAIN STEM 05288950 MISSISSIPPI RIVER AT FORD PLANT AT ST. PAUL, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX WIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 8.8 8.0 8.4 8.6 6.4 7.7 8.0 6.0 6.8 10.6 8.5 9.4 2 8.8 8.0 8.5 7.6 6.0 6.4 7.6 5-8 6.4 10.5 7.1 8.7 3 8.7 8.0 8.5 6.7 5-6 6.2 —— —— —— 9-3 6.8 8.4 4 8.5 7.8 8.2 6.4 4.0 4.8 10.2 7.6 8.4 9-3 6.9 7.8 5 8.2 7.6 7.9 —— —— —— 8.7 6.2 7-7 7.7 6.9 7-3 6 8.0 7.6 7.7 —— —— —— —— --- —— 8.8 6.8 7.4 7 8.4 7.6 8.0 8.6 6.0 7-3 —— —— —— 10.1 7.4 8.9 8 8.6 7.6 8.1 8.7 6.6 7.7 —— —— --- 11.2 9.4 9-9 9 8.4 7-9 8.2 8.7 6.0 7.7 —— —— —— 11.8 9-5 10.6 10 9.0 8.1 8.6 8.2 6.6 7.1 8.4 6.4 7.6 10.4 8.0 8.7 11 9.3 8.3 8.9 8.6 6.6 7.8 8.5 6.1 7.4 10.9 6.5 8.3 12 9.3 7.6 8.7 8.6 7.6 8.2 8.1 6.1 7.1 8.9 6.4 7-5 13 9.7 7-7 8.9 8.7 7.6 8.1 6.9 6.1 6.4 9.2 6.6 8.0 14 9.3 7.7 8.3 8.7 6.4 7-9 7-4 5.3 6.9 8.5 8.4 8.4 15 9.6 7.6 8.6 7.9 6.2 6.9 7.4 5.5 6.9 9-9 8.0 8.8 16 9.8 8.0 8.7 7.7 6.0 6.5 9-7 5-7 7.8 10.4 8.5 9.2 17 8.8 8.0 8.4 7.7 6.0 6.5 10.6 7.9 9.8 10.4 8.6 9-5 18 8.7 8.0 8.3 7.8 5.9 6.4 9.8 6.0 7.8 10.9 9.0 10.2 19 8.8 8.0 8.4 8.8 6.0 7.5 8.6 6.0 6.9 11.0 10.1 10.5 20 8.7 8.0 8.4 9.8 6.2 7.7 6.7 4.3 5-7 11.1 10.3 10.7 21 8.7 8.0 8.3 8.5 6.6 7.4 6.6 4.2 5.2 11.2 10.6 10.9 22 9-9 7.6 8.6 8.7 6.4 7.4 8.1 4.3 5.6 11.4 10.7 11.1 23 10.0 8.1 8.8 8.6 6.0 7.2 9.1 8.0 8.7 11.5 9-5 10.9 24 9.1 8.4 8.7 7.6 6.0 6.5 8.7 7.0 7.8 11.1 10.8 10.9 25 10.5 8.7 9.3 6.6 4.8 5-9 10.1 6.4 8.2 11.3 10.4 10.8 26 10.8 9.0 9.5 8.3 4.4 6.4 9.9 7.9 8.3 11.1 10.4 10.8 27 9.9 8.8 9.3 9.9 6.6 8.2 8.7 6.1 7.4 11.0 10.0 10.4 28 10.2 7-9 9.1 10.0 8.0 8.6 8.5 6.0 7-2 10.2 8.6 9.4 29 8.6 7.6 8.3 10.2 7.9 8.6 6.7 6.0 6.4 30 8.6 7-6 8.1 9.6 6.5 7.9 10.3 5-6 7.6 31 —— —— —— 8.7 6.2 7.6 10.2 8.0 9.2 MONTH 10.8 7.6 8.5 D MINNESOTA RIVEK BASIN

05291000 WHETSTONE RIVER NEAR BIG STONE CITY, SD LOCATION.—Lat 45°17'32", Ions 96°29'l4", in SEJNWi sec.18, T.121 N., R.46 W. , Grant County, Hydrologic Unit 07020001, on right bank 20 ft (6 m) downstream from former nlghway bridge site, 1.5 mi (2.4 km) west of Bin; Stone City, and 4.5 mi (7.2 km) upstream from 3ig Stone Lake. DRAINAGE AREA.—389 mi 2 (1,00

PERIOD OP RECORD.—March 1910 to November 1912 (no winter records'), and March 1931 to current year. Monthly discharge only for some periods, published in WSP 1303.

REVISED RECORDS.--WSP 895: Drainage area. WSP 1308: 1932(M), 1935(M). GAGE.—Water-stage recorder. Datum of gage 1.3 996.96 ft (303.873 m) adjustment of 1912. Mar. 8, 1910, to Nov. 30, 1912, nonrecording gage 2 mi (3 km) downstream at different datum. Mar. 18, 1931, to May 3, 1939, nonrecording gage, at site 20 ft (6 m) upstream at present datum. May 4, 1939, to Nov. 8, 1952, water-stage recorder at site 80 ft (24 m) downstream at present datum. REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.—51 years (water years 1932-82), 47.4 ft^/s (1.342 m^/s), 1.65 in/yr (42mm/yr), 34,340 acre- ft/yr (42.3 hm3/yr) ; median of yearly mean discharges, 34 ftVs (0.96 mVs), 1.19 in/yr (30 mm/yr), 24,600 acre-ft/yr (30 hnH/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 6,870 ft 3 /s (195 m3/s) Apr. 8, 1969, gage height, 14.32 ft (4.365 m) from floodmark; no flow at times in most years. EXTREMES OUTSIDE PERIOD OP RECORD.—Maximum stage known, about 26 ft (8 m) in June 1919, nresent site and datum, from information by local resident, discharge 29,000 ftVs (821 m^/s). EXTREMES FOR CURRENT YEAR.—Maximum discharge, 3,450 ftVs (97-7 m3/s) Mar. 31, gage height 10.97 ft (3.344 m) (backwater from ice), no other peak above base of 200 ftVs (5.66 nP/s); minimum, 0.70 ft 3 /s (0.020 mVs) Aug. 27; minimum gage height, 1.13 ft (0.344 m) Jan. 11.

DISCHARGE, IN CUBIC PERT PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUtJ JUL AUG SEP 1 1.4 3.0 3.6 2.5 .90 25 1180 18 29 4.1 2.8 1.5 2 1.4 2.9 3.3 2.4 • 90 22 630 15 41 3.9 2.5 1.3 3 1.4 2.9 3.4 2.3 • 90 20 355 12 37 3.9 2.4 1.1 4 1.5 3.0 3.4 2.1 .90 18 160 11 24 3.7 2.4 1.0 5 1.4 3.0 3.4 2.0 .90 16 210 11 17 3.6 2.3 1.2 6 1.8 3.2 3.4 1.8 .90 15 135 11 29 3.6 2.3 1.2 7 2.0 3.0 3.6 1.6 .90 14 120 10 23 4.0 2.3 1.2 8 1.8 3.0 3.6 1.4 .90 13 92 9.5 16 4.0 2.1 1.1 9 1.8 3.0 3.6 1.2 .90 12 90 10 13 4.3 2.1 1.0 10 1.7 3.0 3.6 1.0 .90 15 79 12 12 4.7 2.1 1.1 11 1.7 3.0 3.6 .94 .90 32 73 10 11 4.8 2.1 .95 12 1.6 3-0 3.6 .93 .90 50 71 13 11 4.5 1.9 1.3 13 2.4 3.0 3.4 .92 .90 66 97 16 9.5 4.2 1.8 1.6 14 2.7 3-0 3.4 .92 .90 80 133 19 8.7 4.0 1.8 1.5 15 3.0 3.3 3.4 .92 .90 125 139 26 8.3 4.0 1.8 2.3 16 3.0 3.3 3.3 .92 .90 185 147 38 7.8 3.7 1.7 1.7 17 3.0 3.2 3.3 .91 • 90 190 139 43 7.4 3.4 1.5 1.5 18 3.0 3.1 3.2 .91 1.0 150 109 41 6.3 3.3 1.3 1.5 19 3.0 3.1 3.2 .91 1.4 80 81 62 5.9 3.2 1.1 1.7 20 2.9 2.7 3.2 .90 4.0 46 66 55 5.9 2.7 1.3 1.4 21 3.0 2.9 3.1 .90 32 32 57 39 5.8 2.5 1.1 1.2 22 3.0 2.9 3.1 .90 29 24 48 32 5.7 2.4 1.0 1.2 23 2.9 3.2 3.1 .90 32 18 42 26 5.4 2.4 1.2 1.1 24 2.9 3.3 3.1 • 90 30 13 37 23 4.9 2.3 1.2 1.3 25 3.0 3.4 3.0 .90 28 11 33 20 4.7 2.4 1.0 1.4 26 3.0 3.6 3.0 .90 26 10 30 18 4.6 .95 1.3 27 2.9 3.4 2.9 • 90 26 9.0 28 18 4U4* 4.1 .83 1.1 28 2.9 3.4 2.8 .90 26 10 24 16 4l4 4.0 1.1 1.0 29 2.9 3.4 2.8 .90 33 22 15 4.9 3.6 1.5 1.0 30 3.0 3.6 2.7 .90 ___ 470 20 20 4.1 3.0 1.7 1.0 31 3.0 —— 2.6 .90 —— 2840 —— 22 —— 2.8 1.4 —— TOTAL 75.0 93.8 100.7 37.38 250.70 4644.0 4447 691.5 371.8 111.7 52.58 38.75 MEAN 2.42 3.13 3.25 1.21 8.95 150 148 22.3 12.4 3.60 1.70 1.29 MAX 3.0 3.6 3.6 2.5 32 2840 1180 62 41 4.8 2.8 2.3 MIN 1.4 2.7 2.6 .90 .90 9-0 20 9.5 4.1 2.3 .83 .95 CPSM .006 .008 .008 .003 .02 .39 .38 .06 .03 .009 .004 .003 IN. .01 .01 .01 .00 .02 .44 .43 .07 .04 .01 .01 .00 AC-PT 149 186 200 74 497 9210 8820 1370 737 222 104 77 CAL YR 1981 TOTAL 3145 .00 MEAN 8.62 MAX 319 MIN 1.0 CFSM .02 IN .30 AC -FT 6240 WTR YR 1982 TOTAL 10914 .91 MEAN 29-9 MAX 2840 MIN .83 CFSM .08 IN 1.04 AC-PT 21650 97 MINNESOTA RIVER BASIN 05291000 WHETSTONE RIVER NEAR BIG STONE CITY, 3D—Continued WATER-QUALITY RECORDS PERIOD OP RECORD.—Water years 1960-62, 1967-69, 1974 to current year. PERIOD OP DAILY RECORD.— WATER TEMPERATURES: October 1973 to September 1981, March to August 1982. SUSPENDED-SEDIMENT DISCHARGE: October 1973 to September 198l, March to August 1982. REMARKS.—During the winter period, daily sediment concentrations were estimated on the basis of water records and monthly sediment samples, October 1973 to September 1981. Water temperature was obtained when sediment samples were collected. EXTREMES POR PERIOD OP DAILY RECORD.— WATER TEMPERATURES: Maximum daily (water years 1973-81, March to August 1982), 34.0°C July 7, 1974; minimum daily, 0.0°C many days during winter period. SEDIMENT CONCENTRATIONS: Maximum daily mean, 2,540 mg/L Mar. 27, 1979; minimum daily mean, 0 mg/L on July 30, 31, Aug. 1-7, 24-26, 1976. SEDIMENT LOADS: Maximum daily, 5,700 tons (5,170 tonnes) Mar. 31, 1982; minimum daily, 0 ton (0 tonne) on July 30, 31, Aug. 1-7, 24-26, 1976. EXTREMES POR CURRENT PERIOD.--March to August 1982: WATER TEMPERATURES: Maximum daily, 32.5°C July 21; minimum daily observed, 0.5°C Mar. 22, 24. SEDIMENT CONCENTRATIONS: Maximum daily mean, 744 mg/L Mar. 31; minimum daily mean, 7 mg/L Mar. 1-9. SEDIMENT LOADS: Maximum daily, 5,700 tons (5,170 tonnes) Mar. 31; minimum daily, 0.04 ton (0.04 tonnes) Aug. 27.

TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 ONCE-DAILY

DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 5.0 19.0 19.0 27.0 30.5 2 18.5 19.0 32.0 3 1.5 19.5 22.0 29.5 28.0 4 1.0 20.0 31.0 31.0 5 1.5 14.0 22.0 6 4.0 13.0 20.5 7 19.5 29.0 8 4.0 16.0 19.0 26.5 27.0 9 4.5 16.0 17.0 25.5 22.0 10 2.0 5.0 17.5 20.0 22.0 25.0 11 8.0 13.0 21.0 21.0 12 5.5 .0 8.0 13.0 23.0 19.5 13 1.5 11.0 14.5 26.0 24.5 14 2.0 13.5 21.0 28.5 15 3.0 16.0 18.0 21.0 29.0 28.0 16 11.5 18.0 23.0 20.5 29.5 17 12.0 18.5 22.0 27.5 28.5 18 13.0 30.0 19 2.0 8.5 19.0 19.5 29.0 20 9.5 17.5 22.0 32.0 28.0 21 2.0 10.0 15.5 23-5 32.5 26.0 22 .5 13.0 23.5 31.5 26.5 23 .0 1.5 19.0 27.0 24 .5 17.0 17.5 31.5 24, 25 2.0 15.0 18.0 21.5 28.5 24, 26 1.0 13.5 15.5 26.0 27.0 21.0 27 14.0 19.5 28.0 28.5 22.5 28 1.5 16.0 21.0 27.0 25.5 18.0 29 1.5 13.5 23.5 26.5 22.5 30 1.5 27.0 23.0 31 3.0 17.0 28.5 26.5 MAX 32.5 MIN

SED. SED. SED. SED. SED. SED. SED. SUSP. SUSP. SUSP. SUSP. SUSP. SUSP. SUSP. SEDI­ PALL PALL PALL PALL FALL FALL FALL MENT, DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. TEMPER­ SUS­ % FINER % FINER % FINER % FINER % FINER % FINER % FINER ATURE PENDED THAN THAN THAN THAN THAN THAN THAN DATE (DEG C) (MG/L) .002 MM .004 MM .016 MM .062 MM .125 MM .250 MM .500 MM (00010) (80154) (70337) (70338) (70340) (70342) (70343) (70344) (70345) MAR 31... 3.0 718 40 47 60 79 87 96 100 MINNESOTA RIVER BASIN 05291000 WHETSTONE RIVER NEAR BIG STONE CITY, SD—Continued SUSPENDED-SEDIMENT, PERIOD MARCH 1982 TO AUGUST 1982 N MEAN MEAN MEAN MEAN MEAN !EN- CONCEN­ CONCEN­ CONCEN­ CONCEN­ CONCEN­ TON LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS DAY YL) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH 1 7 .47 2 7 .42 3 7 .38 4 7 .34 5 7 .30 6 7 .28 7 7 .26 8 7 .25 9 7 .23 10 15 .61 11 31 2.7 12 21 2.8 13 22 3.9 14 27 5.8 15 32 11 16 35 17 17 35 18 18 30 12 19 25 5.4 20 31 3.9 21 29 2.5 22 32 2.1 23 18 .87 24 14 .49 25 16 .48 26 12 .32 27 10 .24 28 18 .49 29 85 7.6 30 453 575 31 744 5700 TOTAL —— 6376.13

APRIL MAY JUNE JULY AUGUST SEPTEMBER 1 371 1180 70 3.4 65 5.1 48 .53 64 .48 2 271 461 85 3.4 76 8.4 45 .47 80 .54 3 192 184 90 2.9 52 5.2 34 .36 68 .44 4 110 48 116 3.4 50 3.2 39 .39 67 .43 5 65 37 89 2.6 64 2.9 60 .58 73 .45 6 44 16 85 2.5 67 5.2 81 .79 67 .42 7 32 10 95 2.6 54 3.4 99 1.1 56 .35 8 24 6.0 83 2.1 44 1.9 117 1.3 57 .32 9 16 3.9 71 1.9 32 1.1 110 1.3 39 .22 10 18 3.8 80 2.6 33 1.1 112 1.4 31 .18 11 17 3.4 90 2.4 59 1.8 117 1.5 32 .18 12 24 4.6 74 2.6 60 1.8 126 1.5 67 .3* 13 34 8.9 74 3.2 55 1.4 133 1.5 60 .29 14 52 19 75 3.8 52 1.2 125 1.4 45 .22 15 33 12 70 4.9 52 1.2 106 1.1 28 .14 16 22 8.7 77 7.9 66 1.4 105 1.0 34 .16 17 20 7.5 81 9.4 82 1.6 112 1.0 47 .19 18 17 5.0 78 8.6 71 1.2 102 .91 45 .16 19 10 2.2 86 14 68 1.1 66 .57 36 .11 20 18 3.2 69 10 68 1.1 69 .50 29 .10 21 21 3.2 98 10 76 1.2 75 .51 24 .07 22 23 3.0 122 11 78 1.2 50 .32 24 .06 23 23 2.6 126 8.8 74 1.1 43 .28 30 .10 24 31 3.1 112 7.0 72 .95 41 .25 19 .06 25 49 4.4 89 4.8 84 1.1 39 .25 22 .06 26 53 4.3 85 4.1 63 .80 48 .60 30 .08 27 68 5.1 102 5.0 67 .80 22 .24 19 .04 28 77 5.0 106 4.6 78 .93 25 .27 24 .07 29 73 4.3 92 3.7 69 .91 35 .34 18 .07 30 71 3.8 75 4.1 46 .51 42 .34 12 .06 31 —— —— 64 3.8 —— —— 57 .43 18 .07 TOTAL 2063.0 161.1 60.80 23.03 6.46 MINNESOTA RIVER BASIN 05291500 BIG STONE LAKE AT ORTONVILLE, MN LOCATION.—Lat 45°l8'l8", long 96°26'57", in NWjStfJ sec.9, T.121 N., R.46 W. , Big Stone County, Hydrologic Unit 07020001, at powerplant intake at west edge of Ortonville, 0.5 mi (0.8 km) north of concrete dam at outlet, 0.5 mi (0.8 km) southwest of Ortonville. PERIOD OP RECORD.--March 1937 to current year. GAGE.—Nonrecording gage read once a day. Datum of gage is 957-69 ft (291.904 n) National Geodetic Vertical Datum of 1929. Prior to Sept. 17, 1947, nonrecording gage at site 0.5 mi (0.8 km) south at same datun. Sept. 18, 1947, to June 30, 1963, water-stage recorder at site 0.5 mi (0.8 km) south at same datum. Sept. 21, 1959, to June 30, 1963, supplementary nonrecording gage read once daily, at present site and datum. REMARKS.—Natural lake with concrete dam at outlet, ^ixed crest of dam is at 5.95 ft (1.814 m), with one 5 ft (1.5 m) and two 2.5 ft (0.76 m) gates with lowest sill at 0.71 ft (0.22 m). Silt barrier dam 700 ft (213 m) upstream in outlet channel of lake completed July 7, 1958; orest at 5.9 ft (1.80 m). Supplementary nonrecording gage readings used for stages below crest of silt barrier to June 30, 1963. Water level subject to fluctuation caused by *ind action. EXTREMES FOR PERIOD OP RECORD.--Maximum gage height, 12.73 ft (3.880 m) Apr. 17, 1952; minimum observed, 3.53 ft (1.076 m) Mar. 2, 1957 (strong upstream wind in channel). Minimum observations of 3.10 ft (0.945 n) Mar. 2, 1940, and 2.20 ft (0.671 m) Nov. 20, 1940, at spillway site are the result of blockage of channel to spillway by ice and snow and do not represent lake elevations. EXTREMES POR CJRRENT YEAR.—Maximum gage height observed, 8.67 ft (2.643 m) Apr. 7, 17; minimum observed, 5.80 ft (1.768 m) Oct. 12.

GAGE HEIGHT, IN FEET, OCTOBER 1981 TO SEPTEMBER 1982 Oct. 31 ...... 6.07 Feb. 28 ...... 6.37 June 30 ...... 6.95 Nov. 30 ...... 6.06 Mar. 31 ...... 7-24 July 31 ...... 6.87 Dec. 31 ...... 6.10 Apr. 30 ...... 7-97 Aug. 31 ...... 6.51 Jan. 31 ...... 6.25 May 31 ...... 7-88 Sept. 30 ...... 6.65 NOTE.—Gage-height record other than that shown above is available in the District office. 100 MINNESOTA RIVER 3ASTN

05292000 MINNESOTA RIVER AT ORTONVILLE, MN LOCATION.—Lat 45°17'44", lon^ 96°26'38", In MEJNWJ sec.l6, T.121 N., R.46 \J. , Bi. DRAINAGE AREA. —1,160 mi 2 (3,000 km 2 ), approximately. PERIOD OP RECORD.—February 1938 to current year. REVISED RECORDS.—rfSP 895: 1939- WSP 1508: 1912 (yearly mean). GAGE.—Water-sta^e recorder. Datum of p;ac;e is 956.38 ft (291.505 m) National Geodetic Vertical Ha tun of 1929. Prior to Mar. 31, 1939, nonrecordin,.^ ^a^e on downstream side of dam 1,300 ft (396 m) upstream at datum 1.31 ft (0.40 m) higher. REMARKS.—Records -;ood except those for winter neriod, which are fair. Some regulation by li^ Stone Lake (station 05291500). AVERAGE DISCHARGE. — 44 years, 106 ft^/s (3.002 n3/;O, 76,800 icre-ft/yr (94.7 hm^/yp); median of yearly mean discharges, 78 ft3' s (2.21 m3 /s), 56,500 acre-ft/yr (70 Im^/yr).

EXTREMES FOR JURRS'JT YEAR .—Maximum discharge, 424 ft 3 /s (12.0 m^/s) Anr. 20,

DAY 1 1.4 1.4 1.4 i 2.9 2.9 2.9 187 4.6 192 4.6 5.6 1.8 2 1.4 1.4 1.3 2.9 2.9 2.9 215 4.2 167 3.4 3.8 1.3 3 1.4 1.3 1.9 2.9 2.9 2 .9 316 4.6 157 3.0 2.24.*6 1.3 4 1.4 1-3 .03 2.9 2.9 2.9 232 12 147 p . s P.O 5 1.6 1.3 • 90 2.9 2.9 2.9 275 5.5 133 2.3 8.4 2.7 6 1.9 1.3 .92 ."\9 2.9 2.9 278 18 90 3.4 7.3 1.2 7 2.3 1.3 .92 2.9 2.9 2.9 290 76 41 3.4 5.5 2.3 8 1.6 1.3 2.3 2.9 2.9 2.9 298 235 40 4.5 4.2 ?.6 9 1.4 1.3 4.2 2.9 2.9 2.9 276 222 70 5.6 4.1 2.5 10 1.4 1.6 3.8 2.9 2.9 3.0 237 235 50 5.1 3.9 4.1 11 1.7 2.8 3.7 2.9 2.9 3.0 224 273 50 4.2 4.7 3.8 12 1.4 2.5 3.8 2.9 2.9 3.0 234 303 54 4.? 2.9 4.2 13 1.4 2.8 3-7 2.9 2.9 3.8 269 301 50 6.6 2.1 3.0 14 1.6 2.3 3.7 2.9 2.9 4.2 323 274 48 5.4 2.0 3.1 15 1.5 2.5 3.5 2.9 2.9 3.0 350 254 53 5.5 5.1 4.1 16 1.6 3.0 3.4 2.9 2.9 4.2 372 262 49 '1.9 6.1 2.7 17 1.6 2.5 3.3 2.9 2.9 3.0 345 271 51 9.0 4.7 4.3 18 1.6 2.5 3.3 2.9 2.9 2.9 341 279 55 2.9 7.2 6.0 19 1.6 2.8 3.4 2.9 2.9 2.9 349 266 56 6.5 2.4 4.9 20 2.1 2.3 3.0 2.9 2.9 2.9 358 243 58 6.3 3.4 4.1 21 2.5 .83 2.9 2.9 2.9 2.9 308 236 34 5.5 4.6 3-1 22 2.3 1.3 2.9 2. 9 2.9 2.9 287 235 12 3.3 2.8 2.5 23 2.5 2.1 2.9 2.9 2.9 2.9 260 219 4.2 2.7 1.8 2.3 24 1.8 2.5 2.9 2.9 2.9 3.0 237 213 4.2 2.9 1.6 2.1 25 2.5 2.5 2.9 2.9 2.9 2.9 282 214 3tO 3.7 2.8 1.8 26 1.9 2.1 2.9 2.9 « 2.9 3.0 248 211 3pO 6.0 3-8 1.3 27 1.4 1.9 2.9 2.9 2.9 3.0 101 211 2.8 6.0 2.1 .92 28 1.4 1.8 2.9 2.9 2.9 3.8 6.0 203 3.4 9.8 2.8 • 92 29 1.4 1.4 2.9 2.9 ___ 9-1 6.0 220 2.8 9.1 2.4 1.2 30 1.4 1.4 2.9 2.9 39 6.0 215 4.6 7.2 1.2 1.2 31 1.4 --- 2.9 2.9 —— 320 —— 234 —— 5.5 2.5 TOTAL 52.4 57-33 85.27 39.9 81.? 454.5 7570.0 5953-9 1685.0 155.1 118.6 79-34 MEAN 1.69 1.91 2.75 2.90 2.90 14.7 252 192 56.2 5.00 3.83 2.64 MAX 2.5 3.0 4.2 2.9 2.0 320 372 303 19- 9.8 8.4 6.0 MIN 1.4 .83 .90 2.9 2.9 2.9 6.0 4.2 2.8 2.3 1.2 .92 CFSM .001 .002 .002 .003 .003 .01 .22 .17 .05 .004 .003 .002 IN. .00 .00 .00 .00 .00 .01 .24 .19 .05 .00 .00 .00 AC-FT 104 114 169 178 161 902 15020 11810 3340 308 235 157

GAL YR 1981 TOTAL 786. 54 MEAN 2.15 MAX 23 MIN .71 CFSM .002 IN .03 AC-FT 1560 WTR YR 1982 TOTAL 16382. 54 MEAN 44.9 MAX 372 MIN .83 CFSM .04 IN .53 AC-FT 32490 101 MINNESOTA RIVER BASIN 450317096412102 LA BOLT IMPOUNDMENT INLET AT Lft BOLT, SD LOCATION.—Lat 45°02'58", long 96°4l'45", in SWiSWi sec.3, T.118 N., R.49 W., Grant County, Hydrologic Unit 07020001, 500 ft (152 m) north of county highway, 0.8 mi (1.3 km) west of La Bolt, S. Dak. DRAINAGE AREA. —1.9 mi 2 (4.92 km 2 ). WATER-DISCHARGE RECORDS PERIOD OP RECORD.--February to September 1982. Miscellaneous discharge measurements available for 1980 and 1981 water years. GAGE.—Water-stage recorder and crest-stage gage. REMARKS.—Water-stage recorder operated only during open-water period. Records good except those for period Feb. 18 to Apr. 10, which are fair. EXTREMES FOR CURRENT PERIOD.—February to September 1982: Maximum discharge daring period, 335 ft 3/s (9.49 m3/s) Mar. 29, gage height, 16.92 ft (5-157 m); no flow on many days.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .00 .30 22 1.5 4.0 .00 .00 .00 2 .00 .60 18 1.4 2.8 .00 .00 .00 3 .00 .80 11 1.4 2.0 .00 .00 .00 4 .00 1.0 6.2 1.3 1.5 .00 .00 .00 5 .00 .80 4.9 1.2 1.2 .00 .00 .00 6 .00 .80 4.1 1.1 2.5 .00 .00 .00 7 .00 .40 3.4 1.1 4.5 .00 .00 .00 8 .00 .40 2.9 1.1 2.7 .00 .00 .00 9 .00 .50 3.6 1.1 2.1 .00 .00 .00 10 .00 1.4 4.4 1.7 1.7 .00 .00 .00

11 .00 4.0 4.9 2.5 1.4 .00 .00 .00 12 .00 8.0 6.2 3.3 1.2 .00 .00 .00 13 .00 12 5.7 4.4 .94 .00 .00 .00 14 .00 11 5.5 5.5 .81 .00 .00 .00 15 .00 10 5.3 11 .73 .00 .00 .00

16 .00 8.8 4.2 7.8 .60 .00 .00 .00 17 .00 8.6 3.6 5.7 .53 .00 .00 .00 18 .01 6.2 3.1 4.4 .45 .00 .00 .00 19 .02 3.7 2.9 3.6 .38 .00 .00 .00 20 .08 1.5 3.3 3.0 .25 .00 .00 .00 21 .10 1.4 3.3 2.2 .14 .00 .00 .00 22 .10 1.5 3.0 1.9 .11 .00 .00 .00 23 .10 1.7 2.5 1.7 .07 .00 .00 .00 24 .02 1.7 2.1 1.6 .00 .00 .00 .00 25 .01 1.7 1.8 1.8 .00 .00 .00 .00 26 .02 1.6 1.6 1.9 .00 .00 .00 .00 27 .20 1.7 1.6 2.2 .00 .00 .00 .00 28 .30 7.0 1.6 2.1 .00 .00 .00 .00 29 —— 61 1.6 1.9 .00 .00 .00 .00 30 —— 204 1.5 2.4 .00 .00 .00 .00 31 — '42 —— 4.2 —— .00 .00 —— TOTAL .96 406.10 145.8 88.0 32.61 .00 .00 .00 MEAN ,034 13.1 4.86 2.84 1.09 .000 .000 .000 MAX .30 204 22 11 4.5 .00 .00 .00 MIN .00 .30 1.5 1.1 .00 .00 .00 .00 CPSM .02 6.24 2.31 1.35 .52 .000 .000 .000 IN. .02 7.19 2.58 1.56 .58 .00 .00 .00 AC-FT 1.9 805 289 175 65 .00 .00 .00 102 MINNESOTA RIVER BASIN 450317096412102 LA BOLT IMPOUNDMENT INLET AT LA BOLT, SD—Continued PERIOD OP RECORD.—Water years 1980 to current year. REMARKS.—Letter K indicates non-Ideal colony count. Letter E indicates estimated value.

WATER QUALITY DATA, WATER YEAR MARCH TO SEPTEMBER 1982 SPE- BARO­ OXYGEN, COLI- SPE­ CIPIC METRIC DIS­ PORM, STREAM- CIFIC CON­ PH PRES­ SOLVED FECAL, PLOW, CON­ DUCT­ PH LAB SURE OXYGEN, (PER­ 0.7 INSTAN­ DUCT­ ANCE (STAND­ (STAND­ (MM TEMPER­ DIS­ CENT UM-MP TIME TANEOUS ANCE LAB ARD ARD OP ATURE SOLVED SATUR­ (COLS./ DATE (CPS) (UMHOS) (UMHOS) UNITS) UNITS) HG) (DEG C) (MG/L) ATION) 100 ML) (00061) (00095) (90095) (00400) (00403) (00025) (00010) (00300) (00301) (31625) MAR 03... 1200 E.50 1090 1100 — 7.8 E730 .0 11.0 — — 16... 1400 8.0 — — 7.7 — — — — — — 18... 1425 6.2 454 462 — 7-9 737 .5 14.1 101 K31 31... 1800 39 340 391 — 7-9 731 1.0 — — — APR 01. .. 1645 20 444 316 __ 7.8 725 1.5 11.7 88 — 16... 0945 4.5 815 779 — 8.2 E730 9.0 10.8 — — MAY 26... 1010 1.9 937 930 — 8.1 743 14.0 7.6 76 K1900 JUN 10... 1300 1.7 — — — — — — — — —

STREP­ HARD­ ALKA­ TOCOCCI NESS MAGNE­ SODIUM POTAS­ BICAR­ LINITY, ALKA­ PECAL, HARD­ NONCAR- CALCIUM SIUM, SODIUM, AD­ SIUM, BONATE CARBON­ LINITY KF AGAR NESS BONATE DIS­ DIS­ DIS­ SORP­ DIS­ IT-PLD ATE LAB (COLS. (MG/L (MG/L SOLVED SOLVED SOLVED TION SOLVED (MG/L IT-PLD (MG/L PER AS AS (MG/L (MG/L (MG/L RATIO (MG/L AS (MG/L - AS DATE 100 ML) CAC03) CAC03) AS CA) AS MG) AS NA) AS K) HC03) CAC03) CAC03) (31673) (00900) (95902) (00915) (00925) (00930) (0093D (00935) (99440) (99430) (90410) MAR 03... 605 380 145 59 15 .3 14 __ „ 230 16... — — — — 136 112 — 18.. 430 226 96 56 21 4.4 .1 7.6 164 134 130 31.., K4600 186 57 45 18 3.6 .1 5.6 — — 130 APR 01... _ 148 28 36 14 2.9 .1 5.3 _ __ 120 16... — 430 150 103 42 8.6 .2 5.6 — — 280 MAY 26.. 1380 476 140 110 49 12 6.3 341 JUN 10..,

SOLIDS, SOLIDS, NITRO­ NITRO­ SEDI­ CHLO­ PLUO- SILICA, RESIDUE SUM OP GEN, GEN, AM­ MENT, SULPATE RIDE, RIDE, DIS­ AT 180 CONSTI­ N02+N03 MONIA + PHOS­ SEDI­ DIS­ DIS­ DIS­ DIS­ SOLVED DEG. C TUENTS, DIS­ ORGANIC PHORUS, MENT, CHARGE, SOLVED SOLVED SOLVED (MG/L DIS­ DIS­ SOLVED TOTAL TOTAL SUS­ SUS­ (MG/L (MG/L (MG/L AS SOLVED SOLVED (MG/L (MQ/L (MG/L PENDED PENDED DATE AS S04) AS CL) AS P) SI02) (MG/L) (MG/L) AS N) AS N) AS P) (MG/L) (T/DAY) (00945) (00940) (00950) (00955) (70300) (70301) (00631) (00625) (00665) (80154) (80155) MAR 03... 390 5.2 .2 20 888 786 .65 1.70 .230 15 — 16... _ _ _ _ — — — — 18... 110 2.7 .1 14 307 296 .32 .90 .190 3 .05 31... 73 2.4 .1 13 279 239 .28 2.30 .320 215 23 APR 01... 57 1.9 <.l 11 222 200 .51 2.60 .370 143 7.7 16... 170 3.3 .2 25 593 526 .10 .46 .080 40 .49 MAY 26... 170 4.7 .3 17 738 574 <.10 .60 .040 79 .41 JUN 10... — — — — — — — 34 .16 MINNESOTA RIVER BASIN 103 450317096412102 LA BOLT IMPOUNDMENT INLET AT LA BOLT, SD—Continued WATER QUALITY DATA, WATER YEAR MARCH TO SEPTEMBER 1982

SED. BED BED BED SUSP. MAT. MAT. MAT. SIEVE SIEVE SIEVE SIEVE DIAM. DIAM. DIAM. DIAM. % PINER % PINER % PINER % PINER THAN THAN THAN THAN DATE .062 MM 1.00 MM 2.00 MM 4.00 MM (7033D (80168) (80169) (80170) MAR 31... 20 39 64

SED. SED. SED. SED. SED. BED BED BED BED SUSP. SUSP. SUSP. SUSP. SUSP. MAT. MAT. MAT. MAT. PALL PALL PALL SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE DIAM. DIAM. DIAM. DI AM . DIAM. DIAM. DIAM. DIAM. DIAM. % FINER % PINER % PINER % PINER % PINER % PINER % PINER % PINER % PINER THAN THAN THAN THAN THAN THAN THAN THAN THAN DATE .002 MM .004 MM .016 MM .062 MM .125 MM .062 MM .125 MM .250 MM .500 MM (70337) (70338) (70340) (7033D (70332) (80164) (80165) (80166) (80167) MAR 03 — — — — — — — — — 16 . — ______18 ______31 58 66 86 98 100 <1 1 2 6 APR 01 ______16 — ______MAY 26 ______JUN 10 — — — — — — — — — 104 MINNESOTA RIVER BASIN 450317096112100 LA BOLT IMPOUNDMENT POOL AT LA BOLT, SD LOCATION.—Lat 45°03'17", long 96°41'21", in NWJSEJ sec.3, T.118 N., R.49 rf., Grant County, Hydrologic Unit 07020001, 1,000 ft (305 m) downstream of dam in County Park, 0.5 mi (0.8 km) northwest of La Bolt, S. Dak. WATER-DISCHARGE RECORDS PERIOD OP RECORD.--March to September 1982. Miscellaneous gage heights available for 1980 and 1981 water years. GAGE.—Water-stage recorder and crest-stage gage. REMARKS.—Water-stage recorder operated only during open-water period. Records good. Control is a broad crested weir and earthen dam; zero flow is at gage height 8.31 ft (2.533 m). EXTREMES TOR CURRENT PERIOD.—March to September 1982: Maximum gage height during period, 10.88 ft (3.316 m) Mar. 29; minimum gage height, 7.21 ft (2.198 m) Sept. 27.

MONTHEHD GAGE HEIGHT, IN PEST, MARCH TO SEPTEMBER 1982 Mar. 31 ...... 9.22 June 30 ...... 8.15 Aug. 31 ...... 7.41 Apr. 30 ...... 8.42 July 31 ...... 7.91 Sept. 30 ...... 7.22 May 31 ...... 8.53 105 MINNESOTA RIVER BASIN 450317096412100 LA BOLT IMPOUNDMENT AT LA BOLT, SD—Continued PERIOD OF RECORD.--Water years 1980 to current year. REMARKS.—Letter E indicates estimated value.

WATER QUALITY DATA, WATER YEAR MARCH TO SEPTEMBER 1982

S P'5- BARO­ SPE­ CIFIC METRIC TRANS­ CIFIC CON­ PH PRES­ PAR­ HARD­ SAM­ RESER­ CON­ DUCT­ LAB SURE TEMPER­ ENCY NESS PLING VOIR DUCT­ ANCE (STAND­ (MM ATURE, (SECCHI ( MG/L TIME DEPTH DEPTH ANCE LAB ARD OF AIR DISK) AS DATE (FEET) ( FEET) (UMHOS) (UMHOS) UNITS) HG) (DEG 0) (M) CAC03) (00003) (72025) (00095) (90095) (00403) (00025) (00020) (00078) (00900) MAR 03.. 1517 4.00 1190 780 7.6 733 .92 538 APR 20... 1105 9.60 790 735 1.37 MAY 26... 1155 10.5 930 743 .82 JUL 08... 1130 10.0 840 E730 .58 21... 1000 .50 11 624 733 .43 AUG 05... 1045 3.00 582 746 7.6 735 .34 338 19... 1350 9.00 650 E730 .18 SEP 01... 1000 9.00 554 524 9.1 725 .18 264 15... 1305 • 50 505 735 9.9 .21 30.. 0945 .50 10 524 534 8.8 731 .21 250

ALKA­ SOLIDS, NITRO­ MAGNE­ BICAR­ LINITY, CHLO­ SILICA, RESIDUE NITRO­ GEN, CALCIUM SIUM, BONATE CARBON­ RIDE, DIS­ AT 180 GEN, N02+N03 DIS­ DIS­ IT-FLD ATE DIS­ SOLVED DEG. C N02+N03 DIS­ SOLVED SOLVED (MG/L IT-FLD SOLVED (MG/L DIS­ TOTAL SOLVED (MG/L (MG/L AS (MG/L - (MG/L AS SOLVED (MG/L (MG/L DATE AS CA) AS MG) HC03) CAC03) AS CL) SI02) (MG/L) AS N) AS N) (00915) (00925) (99440) (99430) (00940) (00955) (70300) (00630) (00631) MAR 03- 100 70 266 218 7.0 23 764 .49 APR 20. MAY 26. JUL 08. 21. AUG 05. 61 45 3-5 34 478 .18 19- SEP 01. 35 43 3.3 20 348 15. 30. 36 39 3.4 18 397

NITRO­ NITRO­ NITRO­ PHOS­ CHLOR-A CHLOR-B NITRO­ GEN, GEN , AM- GEN, AM­ PHOS­ PHORUS, PHYTO- PHYTO- GEN, AMMONIA MONIA + MONIA + PHOS­ PHORUS, ORTHO, PLANK- PLANK- AMMONIA DIS­ ORGANIC ORGANIC PHORUS, DIS­ DIS­ TON TON TOTAL SOLVED TOTAL DIS. TOTAL SOLVED SOLVED CHROMO CHROMO (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L PLUOROM PLUOROM DATE AS N) AS N) AS N) AS N) AS P) AS P) AS P) (UG/L) (UG/L) (00610) (00608) (00625) (00623) (00665) (00666) (0067D (70953) (70954) MAR 03.. 2.80 4.1 .290 .220 .190 APR 20. . .040 .060 13.1 2.36 MAY 26.. .060 • 90 .070 17.0 3.80 JUL 08.. 1.10 2.2 .880 .800 .800 31.0 7.00 21... .190 AUG 05.. 6.30 7.9 2.20 1.80 160 12.0 19.. 3.90 4.20 .790 SEP 01. . .150 1.0 .320 .020 <.010 15... .310 30... .050 1.4 .270 .040 <.010 1.0 <.100 106 MINNESOTA RIVER BASIN

450317096412100 LA BOLT IMPOUNDMENT AT LA BOLT, SD—Continued

WATER QUALITY DATA, WATER YEAR MARCH TO SEPTEMBER 1982

SOLIDS, NITRO­ NITRO­ NITRO­ PHOS­ ARSENIC BARIUM, BERYL­ CADMIUM CHRO­ VOLA­ GEN, GEN, NH 4 GEN, NH4 PHORUS, TOTAL RECOV. LIUM, RECOV. MIUM, TILE IN N02+N03 TOTAL + ORG. TOTAL IN BOT­ PM BOT­ RECOV. PM BOT­ RECOV. BOTTOM TOT. IN IN BOT. TOT IN IN BOT. TOM MA­ TOM MA­ PM BOT­ TOM MA­ PM BOT­ MA­ BOT MAT MAT. BOT MAT MAT. TERIAL TERIAL TOM MA­ TERIAL TOM MA­ TIME TERIAL (MG/KG (MG/KG (MG/KG (MG/KG (UG/G (UG/G TERIAL (UG/G TERIAL DATE (MG/KG) AS N) AS N) AS N) AS P) AS AS) AS BA) (UG/G) AS CD) (UG/G) (00496) (00633) (00611) (00626) (00668) (01003) (01008) (01013) (01028) (01029) JUL 08.. 1130 104000 <2.0 49 47000 610 <1 100 <1 <1

COPPER, IRON, LEAD, MANGA­ MERCURY NCCKEL, ZINC, CARBON, CARBON, CYANIDE RECOV. RECOV. RECOV. NESE, RECOV. RECOV. RECOV. ORGANIC INOR­ TOTAL PM BOT­ PM BOT­ PM BOT­ RECOV. PM BOT­ PM BOT­ PM BOT­ TOT. IN GANIC, IN BOT­ TOM MA­ TOM MA­ TOM MA­ PM BOT­ TOM MA­ TOM MA­ TOM MA­ BOTTOM TOT IN TOM MA­ TERIAL TERIAL TERIAL TOM MA­ TERIAL TERIAL TERIAL MAT. BOT MAT TERIAL (UG/G (UG/G (UG/G TERIAL ( UG/G (UG/G (UG/G (3/KG (G/KG ( UG/G DATE AS CU) AS PE) AS PB) (UG/G) AS HG) AS NI) AS ZN) AS C) AS C) AS CN) (01043) (01170) (01052) (01053) (71921) (01068) (01093) (00687) (00686) (00721) JUL 17 8700 20 20 64 21 <0

OXYGEN , SPE­ DIS­ CIFIC SOLVED SAM­ CON­ OXYGEN, (PER­ PLING DUCT­ TEMPER­ DIS­ CENT TIME DEPTH ANCE ATURE SOLVED SATUR­ DATE (FEET) (UMHOS) (DEG C) (MG/L) ATION) (00003) (00095) (00010) (00300) (00301) MAR 03. 1515 2.00 860 .5 7.6 55 03. 1517 4.00 1190 2.0 3.6 27 03. 1519 6.00 1260 2.5 1.6 12 03. 1521 8.00 1280 3.0 .5 4 03. 1523 9-50 1280 3.5 .4 3 APR 20. 1055 .50 789 8.0 13.0 114 20. 1058 3.50 787 7.5 12.8 111 20. 1100 6.50 790 7.5 12.9 112 20. 1105 9.60 790 7.5 12.9 112 MAY 26. 1143 .50 879 16.5 7.4 78 26. 1145 3.00 887 16.0 5.6 58 26. 1149 6.00 887 15.0 4.4 45 26. 1152 9.00 914 13.5 .4 4 26. 1155 10.5 930 13.0 .3 3 JUN 10. 1345 .50 791 19.0 9.8 108 10. 1347 3.00 788 18.5 9.8 107 10. 1349 6.00 794 15.5 7.4 76 10. 1352 9.00 797 14.5 6.0 60 10. 1355 10.5 804 14.5 5.6 I 56 23. 1135 .50 760 20.5 9.5 111 23. 1138 3.00 773 20.5 9.5 111 23. 1142 4.00 781 20.0 9.5 109 23. 1145 5.00 789 19.5 6.9 79 23. 1148 6.00 797 18.0 1.1 12 23. 1151 9.00 803 16.5 .5 5 23. 1153 10.2 807 16.5 .4 4 JUL 08. 1120 .50 733 23.5 7.9 _ 08. 1123 3.00 735 23.0 6.5 __ 08. 1125 5.00 739 22.5 2.1 — 08. 1127 9.00 826 17.5 .5 — 08. 1130 10.0 840 16.0 .3 — 21. 1000 .50 624 27.5 15.5 205 21. 1003 3.00 634 27.0 10.0 131 21. 1005 6.00 700 24.0 1.6 20 21. 1008 9.00 708 22.0 .9 11 21. 1010 10.0 727 21.0 .7 ! 8 107 MINNESOTA RIVER BASIN

450317096412100 LA BOLT IMPOUNDMENT AT LA BOLT, SD—Continued

WATER QUALITY DATA, WATER YEAR MARCH TO SEPTEMBER 1982

OXYGEN , SPE­ DIS­ CIFIC SOLVED SAM­ CON­ OXYGEN, (PER­ PLING DUCT­ TEMPER­ DIS­ CENT TIME DEPTH ANCE ATURE SOLVED SATUR­ DATE ( FEET ) (UMHOS) (DEG C) (MG/L) ATION) (00003) (00095) (00010) (00300) (00301) AUG 05... 1040 .50 554 26.5 12.2 158 05... 1045 3.00 582 25.5 5.2 66 05... 1048 6.00 614 24.0 1.6 20 05... 1050 9.00 719 21.0 1.4 16 05... 1100 9.60 764 20.5 1.3 15 19... 1340 .50 500 25.5 12.1 — 19... 1345 3.00 560 24.0 3.5 — 19... 1347 6.00 560 21.0 .2 — 19... 1350 9.00 650 20.0 .1 — SEP 01... 0945 .50 520 20.0 7.6 88 01... 0948 3.00 520 20.0 7.5 87 01. .. 0951 6.00 521 20.0 6.7 78 01... 0954 7.00 — 19.5 5.2 60 01... 0958 8.00 — 19-0 1.8 20 01... 1000 9.00 554 18.0 .7 8 15... 1305 .50 505 15.0 8.6 89 15... 1308 3.00 508 15.0 8.0 82 15... 1311 5.00 511 15.0 7.9 81 15... 1314 6.00 511 15.0 7.7 79 15... 1317 7.00 512 15.0 7.7 79 15... 1320 8.00 513 15.0 7.6 78 15... 1323 9.00 513 15.0 7.5 77 30... 0945 .50 524 14.0 8.2 83 30... 0950 3.00 524 14.0 8.1 82 30... 0953 6.00 528 14.0 6.7 68 30... 0955 7.00 530 14.0 4.2 43 30... 0957 8.00 540 14.0 1.4 14 30... 1000 9.00 557 14.0 1.2 12

BED MAT. PALL DIAM. % FINER THAN DATE .004 MM (80157) MAR 03... 60 JUL 08... 60 108 MINNESOTA RIVER BASIN 450317096412100 LA BOLT IMPOUNDMENT AT LA BOLT, SD—Continued PHYTOPLANKTON ANALYSES, OCTOBER 1931 TO SEPTEMBER 1932

DATE APR 20,82 MAY 26,82 JUL 8,82 AUG 5,82 SEP 1,82 SEP 30,82 TIME 1105 1155 1130 1045 1005 1000

TOTAL CELLS/ML 10000 5600 79000 1000000 2300000 5700000 DIVERSITY: DIVISION 1.2 1.9 1.7 0.9 0.0 0.1 .CLASS 1.2 1.9 1.7 0.9 0.0 0.1 ..ORDER 1.5 2.4 2.4 1.9 1.0 0.6 ...FAMILY 1.7 2.9 2.7 2.1 1.0 0.6 ....GENUS 2. '4 3-3 3-0 2.2 1.0 0.7 CELLS PER- CELLS PER- CELLS PER- CELLS PER- CELLS PER- CELLS PER- ORGANISM /ML CENT /ML CENT /ML CENT /ML ' CENT /ML CENT /ML CENT BACILLARIOPHYTA (DIATOMS) .BACILLARIOPHYCEAE ..BACILLARIALES ...NITZSCHIACEAE ....NITZSCHIA 160 2 1600 2 * 0 ..EUPODISCALES ...COSCINODISCACEAE ....CYCLOTELLA 5400# 52 1500* 27 23000# 29 73000 7 * 0 * 0 ....MELOSIRA 130 2 -- — ....STEPHANODISCUS 1800# 18 ..PRAGILARIALES ...FRAGILARIACEAE ....FRAGILARIA 220 4 ....SYNEDRA 89 2 * 0 ..NAVICULALES ...NAVICULACEAE ....NAVICULA 130 2 * 0 ....NEIDIUM * 0 CHLOROPHYTA (GREEN ALGAE) .CHLOROPHYCEAE ..CHLOROCOCCALES ...CHLOROGOCCACEAE ....SCHROEDERIA * 0 ...DICTYOSPHAERIACEAE ....DICTYOSPHAERIUM 320 3 180 3 37000 ...MICRACTINIACEAE ....GOLENKINIA 89 2 ...OOGYSTAGEAE ....ANKISTRODESMUS 220 4 3100 * 0 ....CHODATELLA * ....KIRCHNERIELLA 5100 6900 * 0 ....OOCYSTIS 4700 * 0 ....SELENASTRUM * 0 ...PALMELLACEAE ....SPHAEROCYSTIS 26000 ...SCENEDESMACEAE ....ACTINASTRUM 11000 1 ....CRUCIGENIA 5500 ....SCENEDESMUS 160 2 270 5 3900 5 28000 3 * 0 ....TETRASTRUM 320 3 3100 4 5500 ,1 ..VOLVOGALES ...CHLAMYDOMONADACEAE . ...CARTERIA * 0 ....GHLAMYDOMONAS !80 9 2000 2 6900 '1 * 0 * 0 . .. .CHLOROGONIUM 80 1 .. .PHACOTACEAE ....PHACOTUS 2000 ...SPONDYLOMORACEAE ....PASCHERINA 320 3 GHRYSOPHYTA .CHRYSOPHYGEAE ..OCHROMONADALES . . .DINOBRYACEAE . ...DINOBRYON 980# 17 . . .OCHROMONADACEAE . .. .OCHROMONAS ...SYNURACEAE ....MALLOMONAS 130 GRYPTOPHYTA (CRYPTOMONADS) .GRYPTOPHYCEAE ..CRYPTOMONADALES . . .CRYPTOMONADACEAE . ...CRYPTOMONAS 320 * 0 NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 15% * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/2% 1.09 MINNESOTA RIVER BASTM 150317096112100 LA BOLT IMPOUNDMENT AT LA BOLT, SD—Continued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1982—Continued

DATE APR 20,82 MAY 26,82 JUL 8,82 AUG 5,82 SEP 1,82 SEP 30,82 TIME 1105 1155 1130 1015 1005 1000 CELLS PER- CELLS PER- CELLS PER- CELLS PER- CELLS PER- CELLS PER- ORGANISM /ML CENT /ML CENT /ML CENT /ML CENT /ML CENT /ML CENT

CYANOPHYTA (BLUE-GREEN ALGAE) .CYANOPHYCEAE ..CHROOCOCCALES ...CHROOCOCCACEAE ....AGMENELLUM — * 0 ....ANACYSTIS 160 2 -- * 0 59000 6 — * 0 ..NOSTOCALES ...NOSTOCACEAE ....ANABAENA — — 1900000 19 910000i* 10 670000 12 ....APHANIZOMENON 5900 7 — - 11000 1 * 0 ..OSCILLATORIALES ...OSCILLATORIACEAE ....OSCILLATORIA 21000# 27 5500000 55 13000000 59 50000000 87 EUGLENOPHYTA (EUGLENOIDS) .EUGLENOPHYCEAE ..EUGLENALES ...EUGLENACEAE ....EUGLENA 530 10 ....TRACHELOMONAS 320 810# 15 1200 NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 15% * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/2% 110 MINNESOTA RIVER BASIN 450317096412104 LA BOLT IMPOUNDMENT OUTLET AT LA BOLT, SD LOCATION.—Lat 45°03'17", long 96°4l'21", in NW4SEJ sec.3, T.118 N., R.49 W., Grant County, Hydrologic Unit 07020001, 1,000 ft (305 m) downstream of dam in County Park, 0.5 mi (0.8 km) northwest of La Bolt, S. Dak. DRAINAGE AREA. —2.1 mi 2 (5.44 km 2 ). WATER-DISCHARGE RECORDS PERIOD OP RECORD.--February to September 1982. Miscellaneous discharge measurements available for 1980 and 1981 water years. GAGE.—Water-stage recorder and crest-stage gage. REMARKS.—Water-stage recorder operated only during open-water period. Records good except those for period Feb. 27 to Mar. 17, which are fair. EXTREMES FOR CURRENT PERIOD.—February to September 1982: Maximum discharge during period, 275 ft 3 /s (7.79 m3 /s) Mar. 30, gage height, 4.26 ft (1.298 ml; no flow on many days.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAM FEB MAR APR MAY JUN JUL SEP

1 .00 .30 25 1.1 3-5 .00 .00 .00 2 .00 .60 20 1.1 2.5 .00 .00 .00 3 .00 .80 8.5 1.0 1.8 .00 .00 .00 4 .00 .80 6.7 1.0 1.5 .00 .00 .00 5 .00 .80 5.4 .83 1.2 .00 .00 .00 6 .00 .80 3.6 .81 1.8 .00 .00 .00 7 .00 .40 3.8 .65 4.2 .00 .00 .00 8 .00 .40 3.2 .71 2.5 .00 .00 .00 9 .00 .50 2.8 .78 1.9 .00 .00 .00 10 .00 1.4 3.8 1.4 1.6 .00 .00 .00 11 .00 3.9 4.0 1.7 1.4 .00 .00 .00 12 .00 5.9 5.1 2.3 1.2 .00 .00 .00 13 .00 7.5 5.1 3.1 .90 .00 .00 .00 14 .00 8.9 4.7 4.7 .69 .00 .00 .00 15 .00 9.8 4.6 9-8 .55 .00 .00 .00 16 .00 9.8 3.3 7.7 • 35 .00 .00 .00 17 .00 8.6 2.5 5-3 .23 .00 .00 .00 18 .00 6.2 2.2 4.0 .06 .00 .00 .00 19 .00 3.7 2.0 3.0 .06 .00 .00 .00 20 .00 1.5 2.2 2.3 .00 .00 .00 .00 21 .00 1.3 2.2 2.0 .00 .00 .00 .00 22 .00 1.5 2.1 1.8 .00 .00 .00 .00 23 .00 1.7 1.9 1.6 .00 .00 .00 .00 24 .00 1.7 1.6 1.5 .00 .00 .00 .00 25 .00 1.7 1.4 1.6 .00 .00 .00 .00 26 .00 1.6 1.2 1.8 .00 .00 .00 .00 27 .00 1.7 1.2 1.8 .00 .00 .00 .00 28 .02 2.1 1.2 1.9 .00 .00 .00 .00 29 —— 79 1.1 1.7 .00 .00 .00 .00 30 —— 185 1.1 2.0 .00 .00 .00 .00 31 —— 42 —— 3.3 —— .00 .00 —— TOTAL .02 391-90 133.5 74.28 27.94 .00 .00 .00 MEAN ,001 12.6 4.45 2.40 ^93 .000 .000 .000 MAX .02 185 25 9.8 4.2 .00 .00 .00 MIN .00 .30 1.1 .65 .00 .00 .00 .00 CFSM ,000 6.00 2.12 1.14 .44 .000 .000 .000 IN. .00 6.94 2.36 1.32 .49 .00 .00 .00 AC-FT .04 777 265 147 55 .00 .00 .00 111 MINNESOTA RIVER BASIN 450317096412104 LA BOLT IMPOUNDMENT OUTLET AT LA BOLT, SD—Continued PERIOD OF RECORD.- -Water years 1980 to current year. REMARKS.—Letter K Indicates non-ideal colony count. Letter E indicates estimated value. WATER QUALITY DATA, WATER YEAR MARCH TO SEPTEMBER 1982 SPE­ BARO­ OXYGEN, COLI- SPE­ CIFIC METRIC DIS­ FORM, STREAM- CIFIC CON­ PH PRES­ SOLVED FECAL, FLOW, CON­ DUCT­ PH LAB SURE OXYGEN , (PER­ 0.7 INSTAN­ DUCT­ ANCE (STAND­ (STAND­ (MM TEMPER­ DIS­ CENT UM-M W TIME TANEOUS ANCE LAB ARD ARD OF ATURE SOLVED SATUR­ (COLS./ DATE (CFS) (UMHOS) (UMHOS) UNITS) UNITS) HG) (DEG C) (MG/L) ATION) 100 ML) (00061) (00095) (90095) (00400) (00403) (00025) (00010) (00300) (00301) (316251 MAR 03... 1645 .78 860 780 _ 7.6 733 .5 10.8 78 — 16-18 1220 8.5 370 378 — 7.8 .6 14.0 100 — 16... 1430 — — -- 7.7 — — — — _- 17... 1610 8.5 370 — 7.7 — E730 .5 14.0 _- -- 18... 1530 7.0 — — — — -- — -- _- 24 31... 1930 38 — 281 — 7.9 731 2.0 — — K320 APR 01... 1700 23 351 — — — 725 1.5 11.4 86 — 16... 1100 3.3 751 719 — 8.2 E730 10.0 10.9 — -- MAY 85' 26... 1120 1.9 862 889 — 8.2 743 16.5 6.4 67 JUN 10... 1400 1.7 — — — — — 19.0 — -- — STREP­ HAKD- ALKA­ TOCOCCI NESS MAGNE­ SODIUM POTAS­ BICAR­ LINITY, ALKA­ FECAL, HARD­ NONCAR- CALCIUM SIUM, SODIUM, AD­ SIUM, BONATE CARBON­ LINITY KF AGAR NESS BONATE DIS­ DIS­ DIS­ SORP­ DIS­ IT-PLD ATE LAB (COLS. (MQ/L (MG/L SOLVED SOLVED SOLVED TION SOLVED (MG/L IT-FLD (MG/L PER AS AS (MG/L (MG/L (MG/L RATIO (MG/L AS (MG/L - AS DATE 100 ML) CAC03) CAC03) AS CA) AS MG) AS NA) AS K) HC03) CAC03) CAC03) (31673) (00900) (95902) (00915) (00925) (00930) (0093D (00935) (99440) (99430) (90410) MAR 03... — 387 220 94 37 8.5 .2 14 — — 170 16-18 — 180 70 44 17 3.3 .1 7.6 — — 110 16... — — — — — 122 100 — 17... — — _- — __ -- _- — -- — -- 18... K4800 — — — — — — — 152 125 — 31... K7360 127 29 31 12 2.6 .1 5.1 — — 98 APR 01... — — __ — — — __ — — — — 16... — 395 140 89 42 11 .2 5.5 — — 260 MAY 26... 480 476 160 110 49 13 .3 6.6 — — 320 JUN 10... — -- — -- — — — — — — — SOLIDS, SOLIDS, NITRO­ NITRO­ SEDI­ CHLO­ FLUO- SILICA, RESIDUE SUM OF GEN , GEN, AM­ MENT, SULFATE RIDE, RIDE, DIS­ AT 180 CONSTI­ N02+N03 MONIA + PHOS­ SEDI­ DIS­ DIS­ DIS­ DIS­ SOLVED DEG. C TUENTS, DIS­ ORGANIC PHORUS, MENT , CHARGE, SOLVED SOLVED SOLVED (MG/L DIS­ DIS­ SOLVED TOTAL TOTAL SUS— SUS­ (MG/L (MG/L (MG/L AS SOLVED SOLVED (MG/L (MG/L (MG/L FENDED PENDED DATE AS S04) AS CL) AS F) SI02) (MG/L) (MG/L) AS M) AS N) AS P) (MG/L) (T/DAY) (00945) (00940) (00950) (00955) (70300) (70301) (00631) (00625) (00665) (80154) (80155) MAR 03... 250 4.9 .1 15 583 525 .86 2.30 .350 4 .00 16-18 77 2.4 .1 13 245 230 .37 1.10 .230 — -- 16... — — — — — — — — 17... — — — — __ — — — — 3 .07 18... — — __ — __ — — — — >\ .08 31... 42 1.8 .1 11 181 164 .35 4.80 .230 55 5.6 APR 01. .. — — — — __ — — — — 32 2.0 16... 150 3.3 .2 24 531 481 .11 .68 .080 34 .30 MAY 26... 190 5.5 .3 19 698 585 <.10 .90 .070 118 .61 JUN 10... — — — — — — — — — 50 .23 SED. SUSP. SIEVE DIAM. % FINER THAN DATE .062 MM (70331) MAR 31 97 112 MINNESOTA RIVER BASIiJ 05293000 YELLOW BANK RIVER NEAR ODESSA, MN LOCATION.—Lat 45°13'35", long 96°21'12", in SEJSS4 sec.l, T.120 N., R.46 W., Lac qui Parle County, Hydrologic Unit 07020001, on left banK 150 ft (46 m) downstream fro-n highway bridge, 2.5 mi (4.0 km) southwest of Odessa, and 4.5 mi (7-2 km) upstream from mouth. DRAINAGE AREA. —393 mi 2 (1,031 km 2 ). WATER-DISCHARGE RECORDS PERIOD OP RECORD.—October 1939 to current year. REVISED RECORDS.—WSP 1338: 1947(M), 1950. GAGE.—Water-stage recorder. Datum of gage is 953-34 ft (290.578 m) National Geodetic Vertical Datum of 1929 (Corps of Engineers bench mark). Prior to Aug. 28, 1940, nonrecording gage at site 150 ft (46 m) upstream at same datum. REMARKS.—Records good except those for winter periods, which are fair. AVERAGE DISCHARGE.—43 years, 55-7 ft3/ s (1.577 m3/ s ) 1.90 in/yr (48 mm/yr), 40,350 acre-ft/yr (49.8 hm3/yr); median of yearly mean discharges, 47 ftVs (1.33 m'/s), 1.60 in/yr (41 mm/yr), 34,100 acre-ft/yr (42 hnwyr). EXTREMES FOR PERIOD OP RECORD.--Maximum discharge, 6,970 ft3/ s (197 mVs) Apr. 9, 1969, gage height, 19.07 ft (5.813 m) from floodmark; no flow at times in several years. EXTREMES FOR CURRENT YEAR.--Maximum discharge, 1,750 ft^/s (49.6 m3 /s) Mar. 31, gage!height, 10.25 ft (3.124 m) (backwater from ice), no other peak above base of 300 ftVs (8.50 nP/s); minimum discharge, 0.17 ftVs (0.005 irH/s) Oct. 3; minimum gage height, 1.6l ft (0.491 m) Aug. 21-24.

DISCHARGE , EN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 19^2 MEAN VALUES

DAY OCT MOV DEC JAN PEB "1AR APR MAY JUN JIJL AUG SEP 1 .23 1.0 2.7 1.4 1.1 35 1010 20 16 3.0 1.0 1.2 2 .20 1.1 2.7 1.3 1.1 40 450 18 21 2.6 .94 1.0 3 .20 1.0 2.7 1.3 1.1 16 345 16 27 2.8 .86 .86 4 • 33 1.1 2.7 1.3 1.1 15 175 15 24 2.4 .80 .86 5 .37 1.0 2.6 1.3 1.1 15 150 14 21 2.2 .80 1.3 6 .45 1.2 2.6 1.3 1.1 10 145 13 20 2.5 .73 1.1 7 .37 1.2 2.5 1.3 1.1 7.5 125 12 19 6.1 .97 .94 8 .33 1.3 2.4 1.3 1.1 6.1 95 11 17 4.6 .94 1.0 9 .33 1.3 2.3 1.3 1.1 4.9 105 10 18 5.9 .73 .94 10 .37 1.3 2.2 1.3 1.1 4.9 90 11 17 4.8 .70 .79 11 .41 1.4 2.1 1.3 1.1 5.6 86 11 21 3.6 .70 1.1 12 .41 1.4 2.0 1.3 1.1 25 78 12 26 3.1 .66 1.4 13 .60 1.5 2.0 1.3 1.1 35 75 15 16 2.7 .79 1.2 14 1.0 1.6 1.9 1.3 1.1 55 75 18 13 2.5 .72 1.0 15 .86 1.7 1.8 1.3 1.1 45 78 23 11 2.5 .72 1.3 16 .79 1.9 1.7 1.3 1.1 40 72 27 9.8 2.3 .66 1.0 17 1.0 2.1 1.6 1.2 1.1 55 69 36 8.7 2.1 .60 1.0 18 1.1 2.1 1.6 1.2 1.1 55 61 46 7.7 1.8 .60 1.0 19 1.0 2.1 1.5 1.2 1.1 70 54 43 6.9; 1.8 .55 1.0 20 1.1 2.4 1.5 1.2 1.2 90 50 39 6.1 2l 1.7 .50 1.0 21 1.0 2.3 1.5 1.2 2.3 80 46 33 5.7 1.7 .50 1.0 22 1.1 2.4 1.4 1.2 4.5 38 43 30 5.3 1.6 .50 1.0 23 1.2 2.9 1.4 1.2 8.8 13 40 27 4 J9 1.5 .50 1.0 24 1.1 3.2 1.4 1.2 17 3.9 36 25 4.!5 1.4 .55 1.0 25 1.1 3.2 1.4 1.2 30 1.2 33 23 4.J2, 1.7 .55 1.0 26 1.2 3.2 1.4 1.2 40 1.2 30 21 3-7 2.1 .86 1.0 27 1.1 3.0 1.4 1.2 30 1.2 27 21 3.5 1.6 1.0 1.0 28 1.1 2.7 1.4 1.2 25 1.7 25 21 3.6 1.4 .79 .94 29 1.3 2.7 1.4 1.1 —— 25 23 19 3.9 1.7 1.4 1.0 30 1.1 2.7 1.4 1.1 —— 150 21 19 3.2 1.4 1.3 1.0 31 1.3 —— 1.4 1.1 —— 1000 —— 17 —— 1.1 1.0 ——

TOTAL 24.05 58.0 58.6 38.6 179.7 1945.2 3712 666 368.8 78.2 23.92 30.93 MEAN .78 1.93 1.89 1.25 6.42 62.7 124 21.5 12.3 2.52 .77 1.03 MAX 1.3 3.2 2.7 1.4 40 1000 1010 46 27 6.1 1.4 1.4 MIN .20 1.0 1.4 1.1 1.1 1.2 21 10 3.2 1.1 .50 .79 AC-PT 48 115 116 77 356 3860 7360 1320 732 155 47 61 GAL YR 1981 TOTAL 1389.39 MEAN 3.81 MAX 37 MIN .20 AC-PT 2760 WTR YR 1982 TOTAL 7184.00 MEAN 19.7 MAX 1010 MIN .20 AC-PT 14250 113 MINNESOTA RIVER BASIN 05293000 YELLOW BANK RIVER NEAR ODESSA, MN--Continued WATER-QUALITY RECORDS PERIOD OP RECORD.—Water years 1961-62, 1974 to 1981, March 1982 to August 1982. PERIOD OP DAILY RECORD.— WATER TEMPERATURES: October 1973 to September 1981, March 1982 to August 1982. SUSPENDED-SEDIMENT DISCHARGE: October 1973 to September 198l, March 1982 to August 1982. REMARKS.—During the winter period, suspended-sediment samples were collected monthly and daily sediment concentra­ tion was estimated on the basis of water records and monthly sediment samples. Water temperature was obtained once daily during open water period and monthly for the winter period. EXTREMES POR PERIOD OP DAILY RECORD.— WATER TEMPERATURES: Maximum daily, 29.0°C July 10, 1974, July 17, 1975; minimum daily, 0.0°C on many days daring winter periods. SSDII1ENT CONCENTRATIONS: Maximum daily mean, 731 mg/L Apr. 13, 1979; minimum daily mean, no flow for several days during 1976, 1977, 1980. SEDIMENT LOADS: Maximum daily, 4,880 tons (4,430 tonnes) Apr. 13, 1979; minimum daily, no flow for several days during 1976, 1977, 1980. EXTREMES POR CURRENT PERIOD.—Water year 1981: WATER TEMPERATURES: Maximum daily, 28.0°C July 24; minimum daily, 0.0°C on many days during winter period. SEDIMENT CONCENTRATIONS: Maximum daily mean, 172 mg/L Nov. 15; minimum daily mean, 9 mg/L Mar. 8. SEDIMENT LOADS: Maximum daily, 7.3 tons (6.6 tonnes) July 4; minimum daily, 0.03 ton (0.03 tonne) Sept. 18-22. March to August 1982: WATER TEMPERATURES: Maximum daily, 28.5°C July 18; minimum daily, 0.0°C on several days during winter period. SEDIMENT CONCENTRATIONS: Maximum daily mean, 588 mg/L Mar. 31; minimum daily mean, 6 mg/L Mar. 24, 25. SEDIMENT LOADS: Maximum daily, 1,790 tons (1,620 tonnes) Mar. 31; minimum daily, 0.02 ton (0.02 tonne) Mar. 25. TEMPERATURE, WATER (DEO. C), WATER YEAR OCTOBER 1980 TO SEPTEMBER 1931 ONCE-DAILY DAY NOV DEC JAN MAR APR MAY JUN JUL AUO SEP 1 10.0 4.0 1.0 6.0 12.0 19.0 22.0 24.0 17.0 2 13.0 4.0 .0 8.0 14.0 20.0 22.0 25.0 16.0 3 8.0 7.0 2.0 11.0 17.0 19-0 24.0 24.0 17.0 4 8.0 6.0 .0 6.0 14.0 20.0 23.0 24.0 15.0 5 9.0 4.0 2.0 1.0 5-0 11.0 20.0 24.0 24.0 17.0 6 10.0 1.0 7.0 12.0 20.0 24.0 23.0 21.0 7 13.0 2.0 9.0 13.0 21.0 25.0 23.0 19.0 8 13.0 1.0 10.0 15.0 23.0 26.0 21.0 17.0 9 12.0 2.0 9.0 12.0 19.0 25.0 24.0 18.0 10 11.0 2.0 11.0 10.0 17-0 22.0 19.0 18.0 11 9.0 1.0 2.0 11.0 12.0 19.0 25.0 21.0 19.0 12 7.0 2.0 2.0 8.0 13.0 19.5 25.0 21.0 17.0 13 7.0 .0 1.0 12.0 11.0 19.0 25.0 24.0 19.0 14 7-0 2.0 1.0 6.0 14.0 21.0 25.0 24.0 17.0 15 7.0 2.0 1.0 2.0 12.0 15.0 21.0 25.0 22.0 16.0 16 7.0 2.0 11.0 14.0 22.0 22.0 21.0 14.0 17 7.0 2.0 14.0 15.0 19.0 23.0 22.0 11.0 18 6.0 1.0 13.0 13.0 18.0 23.0 18.0 18.0 19 7.0 1.0 12.0 13.0 19-0 24.0 18.0 16.0 20 6.0 .5 1.0 14.0 14.0 17.0 23.0 20.0 18.0 21 1.0 10.0 16.0 18.0 26.0 20.0 14.0 22 1.0 11.0 17-0 17-0 24.0 21.5 14.0 23 7-0 1.0 8.0 20.0 19.0 25-0 22.0 14.0 24 6.0 8.0 9.0 17.0 20.0 28.0 21.0 14.0 25 5.0 1.0 2.0 13.0 15.0 20.0 22.0 22.0 16.0

26 1.0 6.0 14.0 15.0 20.0 20.0 21.0 15.0 27 1.0 .5 5.0 16.0 16.0 22.0 20.0 21.0 15.0 28 1.0 9.0 15.0 19.0 23.0 18.0 19-0 11.0 29 3.0 1.0 10.0 15.0 17.0 22.0 20.0 20.0 12.0 30 4.0 1.0 10.0 14.0 17.0 21.0 21.0 20.0 14.0 31 4.0 8.0 18.0 23.0 23.0 MEAN 7.5 3.5 1.5 .5 -5 3.0 10.5 14.5 20.0 23.5 21.5 16.0 WTR YR 1981 MEAN 12.5 MAX 28.0 MIN

BED BED BED BED BED BED BED BED BED NUMBER MAT. MAT. MAT. MAT. MAT. MAT. MAT. MAT. MAT. OP STREAM- SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SAM­ PLOW, DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. PLING INSTAN­ % FINER % FINER % FINER % FINER % FINER % FINER % FINER % FINER % FINER POINTS TANEOUS THAN THAN THAN THAN THAN THAN THAN THAN THAN DATE (CFS) .062 MM .125 MM .250 MM .500 MM 1.00 MM 2.00 MM 4.00 MM 8.00 MM 16.0 MM (00063) (00061) (80164) (80165) (80166) (80167) (80168) (80169) (80170) (80171) (80172) SEP 30... .20 14 23 48 70 85 93 100 114 MINNESOTA RIVER BASIN

05293000 YELLOW BANK RIVER NEAR ODESSA, MN--Continued

SUSPENDED-SEDIMENT, WATER YEAR OCTOBER 1980 TO SEPTEMBER 1981 MEAN MEAN MEAN MEAN MEAN MEAN CONCEN­ CON GEN- CONCEN- CONCEN- CONCEN- CON GEN- TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS DAY (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH

1 87 .09 121 • 95 71 .44 154 .96 ii!d .65 27 .87 2 83 .07 120 .97 87 .45 154 .96 106 .63 134 1.8 3 70 .06 109 .94 93 .50 154 .96 102 .61 70 2.5 4 48 .05 140 1.3 60 .37 154 .96 98 .58 28 .91 5 50 .07 121 1.2 63 .44 154 .96 94 .56 14 .42 6 63 .09 128 1.4 121 .78 154 .96 90 .53 38 .94 7 115 .17 81 .81 158 .98 155 .96 86 .51 22 .55 8 95 .14 98 1.0 115 .65 155 • 96 83 .49 9 .27 9 72 .11 118 1.1 116 .66 155 .92 79 .47 56 2.1 10 133 .20 81 .66 110 .59 155 .92 75 .45 25 .74 11 123 .18 85 .69 113 .64 155 • 92 71 .42 23 .68 12 129 .19 151 1.2 134 .69 155 .92 67 .40 14 .42 13 113 .20 157 1.3 131 .67 155 • 92 63 .37 15 .45 14 138 .25 144 1.2 139 .79 155 .92 59 .35 20 .59 15 121 .24 172 1.3 148 1.1 155 .92 55 .33 14 . .49 16 157 .59 127 • 93 152 1.1 156 .93 52 .34 23 .53 17 120 .52 128 .90 152 1.1 156 .93 48 .91 27 .49 18 118 .54 128 .90 152 1.1 156 .93 44 1.4 26 .47 19 138 .71 82 .53 152 1.1 156 .93 40 1.4 25 .64 20 111 .60 89 .62 153 1.1 156 .93 36 1.4 18 .43 21 121 .75 90 .66 153 1.1 152 .90 32 .82 28 .91 22 122 .79 115 .84 153 1.0 148 .88 28 .57 26 .69 23 98 .53 116 .85 153 1.0 145 .86 24 .57 29 .72 24 118 .64 134 1.0 153 1.0 141 .84 21 1.1 27 .60 25 150 .85 122 .89 153 .99 137 .81 17 .55 45 .96 26 128 .79 86 .67 153 .99 133 .79 13 .34 37 • 72 27 120 .75 57 .45 153 .99 129 .77 10 .30 43 .81 28 113 .73 132 1.0 153 .99 125 .74 11 .39 61 1.1 29 144 1.0 126 1.0 154 1.0 121 • 72 —— 50 1.1 30 119 .84 72 .58 154 1.0 117 .69 —— —— 55 1.4 31 116 .91 — - —— 154 .96 114 .68 —— 51 1.5 TOTAL —— 13.65 —— 27-84 —— 26.27 —— 27.45 —— 17-44 —— 26.80

APRIL MAY JUNE JULY AUGUST SEPTEMBER 47 2.2 Ill 1.5 79 .32 92 .35 85 .73 103 .13 46 2.2 85 1.1 89 .38 76 .27 66 .45 103 .13 40 1.8 92 1.3 76 .33 43 .17 68 .44 125 .15 44 1.9 73 .97 80 .32 61 7.3 61 .33 121 .15 40 1.6 118 1.5 144 .70 17 .44 65 .30 102 .12 41 1.5 63 .77 124 .50 15 .18 50 .20 97 .11 38 1.2 81 .77 127 .48 13 .09 59 .21 107 .19 33 .89 106 1.0 116 .47 30 .14 68 .24 88 .13 9 35 .87 96 .86 121 .52 57 .23 48 .16 102 .12 10 30 .77 98 .87 158 .64 68 .24 49 .16 93 .10 11 29 .69 93 .73 146 .55 77 .31 56 .20 100 .10 12 32 • 73 95 .72 123 .50 84 .88 U9 .39 83 .07 13 40 .92 81 .61 109 1.4 26 .16 140 .36 79 .06 14 43 .88 62 .47 86 5.8 31 .16 138 .27 80 .07 15 32 .63 120 .97 53 5.0 86 .37 107 .17 90 .08 16 34 .64 117 .85 25 1.6 95 .54 73 .11 79 .08 17 112 1.9 98 .64 44 1.5 99 .61 87 .13 68 .07 18 118 1.8 88 .57 31 .77 93 .33 81 .11 30 .03 19 102 1.5 98 .64 35 .68 92 .67 103 .14 36 .03 20 71 1.1 86 .49 40 .60 115 • 93 102 .11 42 .03 21 78 1.3 120 .65 68 .94 94 .63 101 .11 53 .03 22 42 .79 123 .56 74 .90 67 .58 80 .11 59 .03 23 77 1.3 75 .41 51 .59 73 .73 105 .14 68 .04 24 52 .90 69 .37 73 .85 90 .78 105 .14 80 .04 25 91 1.6 71 .36 80 .76 112 .67 110 .18 102 .06

26 125 2.4 116 .56 85 .76 116 2.4 104 .15 78 .05 27 124 2.3 131 .71 93 .55 102 1.5 lO? .14 97 .09 28 110 2.1 122 .86 108 .58 100 1.1 125 .17 70 .05 29 98 1.7 79 .43 84 .43 100 .76 132 .18 66 .04 30 129 2.0 77 .42 83 .34 100 .65 98 .12 97 .06 31 —— —— 72 .33 113 • 76 n .10 —— —— TOTAL 42.11 22.99 29-76 24.93 6.75 2.44 115 MINNESOTA RIVER BASIN

05293000 YELLOW BANK RIVER NEAR ODESSA, MN—Continued TEMPERATURE, WATER (DEQ. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 ONCE-DAILY DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 1.0 1.0 13.0 16.0 20.0 24.0 2 .0 5.0 17.0 14.0 22.0 25.0 3 .0 2.0 17.0 15.0 22.0 26.0 4 .0 2.0 19.0 17.0 26.0 24.0 5 .0 1.0 16.0 16.0 27.0 25.0 6 .0 1.0 13.0 18.0 25.0 25.5 7 .0 2.0 11.0 17.0 21.0 23.0 8 .0 1.0 12.0 16.0 22.0 23.0 9 .0 2.0 16.0 17.0 23.0 22.0 10 2.0 5.0 16.0 16.5 22.0 24.0 11 1.0 6.0 16.0 16.0 22.0 18.0 12 8.5 .0 1.0 7.0 14. 0 16.0 22.0 18.0 13 1.0 7.0 14.0 17.0 24.0 19.5 IH 2.0 10.0 16.0 20.0 23.0 20.0 15 1.0 13.0 17.0 18.0 24.5 19.0 16 1.0 13.0 20.0 19.0 25.0 20.0 17 1.0 10.0 19.0 19.0 25.0 20.5 18 1.0 11.0 18.0 18.0 28.5 24.0 19 1.0 10.0 16.0 17.0 23.0 24.0 20 1.0 7.0 17.0 16.0 25.0 21.0 21 1.0 7.0 15.0 __ 25.0 20.5 22 .0 10.0 15.0 —— 25.0 22.0 23 .0 1.0 10.0 16.0 —— 26.0 21.0 24 1.0 13.0 17.0 —— 25.0 21.0 25 1.0 15.0 17.0 —— 24.5 19.0 26 .0 11.0 17.0 __ 24.0 19.0 27 .0 10.0 17.0 —— 22.0 16.0 28 3-0 11.0 17.0 27.0 24.0 16.5 29 2.0 11.0 17.0 21.0 23.0 20.0 30 3.0 12.0 17.0 20.0 22.0 17.5 31 2.0 —— 16.0 —— 23.0 19.0 MEAN 1.0 7.5 16.0 17.5 23.5 21.0 WTR YR 1982 MAX 1.5 MIN

SED. SED. SED. SED. SED. SED. SED. SED. SUSP. SUSP. SUSP. SUSP. SUSP. SUSP. SUSP. SUSP. SEDI­ PALL PALL PALL FALL FALL FALL FALL SIEVE MENT, DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. TEMPER­ SUS­ % FINER % FINER % FINER % FINER % FINER % FINER % FINER % FINER ATURE PENDED THAN THAN THAN THAN THAN THAN THAN THAN DATE (DEG C) (MG/L) .002 MM .004 MM .016 MM .062 MM .125 MM .250 MM .500 MM .062 MM (00010) (80154) (70337) (70338) (70340) (70342) (70343) (70344) (70345) (7033D MAR 10... 2.0 172 — — — — — — — 51 31... 2.0 767 41 48 63 82 90 99 100 — 116 MINNESOTA RIVER 3ASIM 05293000 YELLOW BANK RIVER NEAR ODESSA, MN--Continued SUSPENDED-SEDIMENT, PERIOD MARCH 1982 TO AUGUST 1982 MEAN MEAN MS AN MEAN MEAN CONCEN­ CONCEN­ I- OOMCEN- CONCEN- CONCEN- TRATION LOADS TRATION LOADS 'N LOADS TRATION LOADS TRATION LOADS TRATION LOADS DAY (MG/L) (T/DAY) (MG/L) (T/DAY) ,) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY)

OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH 1 17 1.6 2 15 1.6 3 24 1.0 4 24 .97 5 17 .69 6 19 .51 7 32 .65 8 33 .54 9 29 .38 10 51 .67 11 22 .33 12 14 .95 13 13 1.2 14 15 2.2 15 25 3.0 16 23 2.5 17 18 2.7 18 17 2.5 19 20 3.8 20 32 7.8 21 17 3.7 22 9 .92 23 8 .28 24 6 .06 25 6 .02 26 9 .03 27 8 .03 28 8 .04 29 25 1.7 30 173 78 31 588 1790 TOTAL —— 1910.37

APRIL MAY JUNE JULY AUGUST SEPTEMBER 1 284 853 125 6.8 69 3.0 103 .83 136 .37 2 197 239 136 6.6 41 2.3 64 .45 49 .12 3 138 129 139 6.0 52 3.8 68 .51 46 .11 4 51 24 107 4.3 71 4.6 54 .35 68 .15 5 40 16 107 4.0 86 4.9 56 .33 49 .11 6 34 13 135 4.7 80 4.3 51 .34 117 .23 7 50 17 129 4.2 81 4.2 66 1.1 128 .34 8 42 11 141 4.2 54 2.5 49 .61 114 .29 9 32 9.1 150 4.1 70 3.4 109 1.7 126 .25 10 29 7.0 144 4.3 68 3.1 141 1.8 127 .24 11 26 6.0 104 3.1 111 6.3 136 1.3 82 .15 12 22 4.6 84 2.7 180 13 131 1.1 100 .18 13 25 5.1 82 3.3 164 7.1 101 .74 124 .26 14 29 5.9 111 5.4 112 3.9 161 1.1 66 .13 15 40 8.4 87 5.4 118 3.5 145 .98 55 .11 16 57 11 80 5.8 122 3.2 151 .94 93 .17 17 40 7.5 97 9.4 105 2.5 163 .92 110 .18 18 37 6.1 86 11 104 2.2 158 .77 95 .15 19 38 5.5 78 9.1 103 1.9 131 .64 112 .17 20 38 5.1 89 9.4 83 1.4 144 .66 118 .16 21 40 5.0 95 8.5 82 1.3 127 .58 106 .14 22 34 3-9 96 7.8 82 1.2 142 .61 106 .14 23 64 6.9 61 4.4 84 1.1 153 .62 131 .18 24 64 6.2 75 5.1 85 1.0 137 .52 96 .14 25 89 7.9 92 5.7 86 .98 133 .61 102 .15 26 98 7.9 106 6.0 88 .88 122 .69 113 .26 27 96 7.0 75 4.3 88 .83 139 .60 98 .26 28 92 6.2 84 4.8 88 .86 114 .43 96 .20 29 87 5.4 85 4.4 71 .75 139 .64 70 .26 30 130 7.4 72 3.7 88 .76 107 .40 83 .29 31 —— —— 79 3.6 —— 133 .40 68 .18 TOTAL 1447.1 172.1 90.76 23.27 6.07 117 MINNESOTA RTVER BASIN 0529^000 POMMR DE TERRE RTVER AT APPLETON, MN LOCATION.~Lat 45°12'10", long 96°01'20", in SW4NWJ sec.14, T.120 N., R.43 W., Swift County, Hydrologic Unit 07020002, on left bank 60 ft (18 m) upstream from bridge on U.S. Highway 59 and State Highway 119 at Appleton and 8 mi (13 km) upstream from mouth. DRAINAGE AREA.—905 mi 2 (2,344 km2 ), approximately. PERIOD OP RECORD.—March 1931 to September 1935 (no winter records), October 1935 to current year. Prior to October 1953, published as "near Appleton." REVISED RECORDS.—WSP 1308: 1931(M), 1937(M). GAGE.—Water-stage recorder and concrete control. Datum of gage is 978.00 ft (298-094 m) National Geodetic Verti­ cal Datum of 1929. Prior to Dec. 22, 1952, nonrecording gage at site 4 mi (6 km) upstream at datum 25-17 ft (7.672 m) higher. REMARKS.—Records good except those for winter period, which are fair. Plow affected by lakes above station. Occasional regulation at low flow by old mtlldam 500 ft (152 m) upstream. AVERAGE DISCHARGE.—47 years (water years 1936-82), 104 ft3/s (2.945 m3/s), 1.56 in/yr (40 ram/yr), 75,350 acre- ft/yr (92.9 hm3/yr); median of yearly mean discharge, 93 ft3/s (2.63 mVs), 1.40 in/yr (36 mm/yr), 67, 400 acre-ft/yr (83 hnwyr).

EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 5,520 ft3/s (156 m3/s) Apr. 11, 1969, gage height, 13-78 ft (4.200 m); maximum gage height, 14.58 ft (4.444 m) Apr. 9, 1969 (backwater from ice); no flow for several periods.

EXTREMES FOR CURRENT YEAR.—Peak discharges above base of 200 ft 3 /s (5.66 m3/s) and maximum (*): Discharge Gage height Discharge Gage height Date Time (ft3/s ) (np/s) (ft) (m) Date Time (ftVs) (m3/s) (ft) (m) Apr. 1 0345 *1,510 42.8 *7.87 2.399 July 10 1730 310 5.64 1.719 Apr. 8 1130 1,210 34.3 7.36 2.243 Minimum discharge, 1.7 ft^/s (0.048 m3/ s ) Feb. 16, gage height, 3.40 ft (1.036 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN PEB MAR 4PR MAY JUN JUL AUG SEP 1 19 27 28 15 2.2 5.4 1380 235 145 79 58 44 2 19 26 21 15 2.1 5-5 1210 220 139 74 54 80 3 20 24 24 15 2.0 5-8 1150 213 132 77 51 72 4 21 25 25 15 2.0 5-9 999 202 128 76 48 56 5 21 30 22 14 1.9 5.8 905 197 122 78 46 54 6 22 36 25 13 1.9 5.8 803 190 123 131 45 50 7 20 35 25 13 1.9 5.7 1050 187 120 107 48 49 8 19 32 24 12 1.9 6.0 1160 181 119 99 47 46 9 17 30 23 11 1.9 5-8 1010 174 115 131 46 43 10 17 27 22 11 1.8 5-8 836 172 116 279 46 45 11 19 27 21 8.6 1.8 6-3 764 171 121 220 44 44 12 19 27 21 7.2 1.8 7.0 729 176 128 159 41 49 13 26 28 22 6.8 1.8 7.7 714 188 124 141 38 48 14 31 32 21 6.1 1.8 16 706 197 114 139 35 51 15 35 31 22 5.5 1.8 38 698 195 111 149 33 53 16 30 32 19 5.0 1.7 42 668 189 103 144 30 53 17 36 29 16 4.4 1.8 114 655 184 97 136 28 52 18 39 29 15 4.1 2.0 171 629 187 97 126 30 50 19 42 27 13 3.8 2.4 149 581 189 93 116 41 46 20 41 17 13 3-7 2.6 86 516 187 90 107 35 44 21 43 21 14 3-5 3.0 113 465 182 87 103 29 44 22 38 25 16 3.4 3.3 128 428 176 84 95 29 44 23 34 28 18 3.3 3.5 100 408 171 80 89 27 40 24 31 29 18 3.2 3-7 83 382 167 87 82 33 37 25 34 29 17 3.1 4.0 76 351 163 85 78 40 33 26 35 31 17 3-0 4.4 82 316 162 89 83 41 33 27 32 18 17 2.8 4.7 90 293 161 86 85 42 33 28 31 18 17 2.8 5-2 98 279 159 85 76 41 31 29 30 23 17 2.6 138 258 154 77 71 46 30 30 27 28 17 2.4 —— 320 246 153 83 65 43 32 31 27 — - 16 2.3 —— 765 —— 150 61 41 ___ TOTAL 875 821 606 221.6 70.9 2687-5 20589 5632 3180 3456 1256 1386 MEAN 28.2 27.4 19.5 7.15 2.53 86.7 686 182 106 111 40.5 46.2 MAX 43 36 28 15 5-2 765 1380 235 145 279 58 80 MIN 17 17 13 2.3 1.7 5.4 246 150 77 61 27 30 CPSM .03 .03 .02 .008 .003 .10 .76 .20 .12 .12 .05 .05 IN. .04 .03 .02 .01 .00 .11 .85 .23 .13 .14 .05 .06 AC- FT 1740 1630 1200 440 141 5330 40840 11170 6310 6850 2490 2750 CAL YR 1981 TOTAL 21509-0 MEAN 58.9 MAX 632 MIN 13 CPSM .07 IN .88 AC-FT 42660 WTR YR 1982 TOTAL 40781.0 MEAN 112 MAX 1380 MIN 1.7 CPSM .12 IN 1.68 AC- FT 80890 118 MINNESOTA RIVER BASIN 443916096174801 LAC QUI PARLE RIVER NEAR CANBY, MN LOCATION.—Lat 44°39'l6", long 96°17'48", in NW4SE4 sec.29, T.114 N., R.45 W., Yellow Medicine County, Hydroloigic Unit 07020003, 4 ml (6.4 km) southwest of Canby, on township road, 1 ml (1.6 km) west of U.S. Highway 75 and 0.25 mi (0.40 km) south of County Highway 36. DRAINAGE AREA. —186 mi 2 (482 km 2 ). WATER-DISCHARGE RECORDS PERIOD OP RECORD.—March to September 1982. GAGE.—Water-stage recorder and crest-stage gage. REMARKS.--Records good except those for Mar. 1 to Apr. 10, which are fair. EXTREMES FOR CURRENT PERIOD.—March to September 1982: Maximum discharge during period, 181 ft 3 /s (5.13 ra3 /s) Mar, 30, gage height, 3-62 ft (1.10 m); no flow on many days.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 1.0 66 3.4 2.3 .84 .00 .00 2 1.0 46 2.9 2.1 .62 .00 .00 3 1.0 72 2.9 1.8 .56 .00 .00 4 1.0 53 2.8 1.6 .45 .00 .00 5 1.0 39 2.5 1.2 .41 .00 .00 6 1.0 32 2.3 1.0 .35 .00 .00 7 .05 26 2.1 1.0 • 35 .00 .00 8 1.0 20 2.0 .96 -35 .00 .00 9 .05 18 1.8 .93 2.6 .00 .00 10 1.0 17 1.8 .92 1.6 .00 .00 11 2.5 18 1.8 .85 1.3 .00 .00 12 4.5 33 3.1 .76 .98 .00 .00 13 6.5 37 3.6 .70 .69 .00 .00 IH 8.5 31 5.1 .64 .50 .00 .00 15 11 28 7.3 .64 .35 .00 .00 16 11 21 8.7 .57 .35 .00 .00 17 11 17 8.7 .57 • 31 .00 .00 18 11 14 7.8 .50 .27 .00 .00 19 11 12 6.3 .49 .22 .00 .00 20 12 13 4.6 .40 .12 .00 .00 21 14 13 3.9 .34 .08 .00 .00 22 16 12 3.3 .30 .07 .00 .00 23 20 11 2.9 .25 .05 .00 .00 24 20 9.6 2.7 1.1 .05 .00 .00 25 16 8.2 2.4 1.9 .03 .00 .00 26 27 6.9 2.4 1.3 .00 .00 .00 27 35 6.0 2.5 .77 .00 .00 .00 28 4.0 5.0 2.3 1.2 .00 .00 .00 29 .00 4.3 2.1 1.9 .00 .00 .00 30 .00 4.0 1.9 1.3 .00 .00 .00 31 .00 —— 2.5 —— .00 .00 — TOTAL 249.10 693.0 110.4 30.59 13.50 .00 .00 MEAN 8.04 23.1 3.56 1.02 .44 .000 .000 MAX 35 72 8.7 2.3 2.6 .00 .00 MIN .00 4.0 1.8 .25 .00 .00 .00 CFSM .04 .12 .02 .005 .002 .000 .000 IN. .05 .14 .02 .01 .00 .00 .00 AC-FT 494 1370 219 61 27 .00 .00 119 MINNESOTA RIVER BASIN 443916096171801 LAC QUI PARLE RIVER NEAR CANBY, MN—Continued PERIOD OP RECORD.--Water year 1982 to current year REMARKS.—Letter K Indicates non-Ideal colony count. Letter E indicates estimated value. WATER QUALITY DATA, WATER YEAR MARCH TO SEPTEMBER 1982 SPE­ BARO­ OXYGEN, COLI- SPE­ CIFIC METRIC DIS­ PORM, STREAM- CIFIC CON­ PH PRES­ SOLVED PECAL, PLOW, CON­ DUCT­ PH LAB SURE OXYGEN, (PER­ 0.7 INSTAN­ DUCT­ ANCE (STAND­ (STAND­ (MM TEMPER­ DIS­ CENT UM-MP TIME TANEOUS ANCE LAB ARD ARD OP ATURE SOLVED SATUR­ (COLS./ DATE (CPS) (UMHOS) (UMHOS) UNITS) UNITS) HG) (DEG C) (MG/L) ATION) 100 ML) (00061) (00095) (90095) (00400) (00403) (00025) (00010) (00300) (00301) (31625) MAR 05... 1330 El.O 1390 1300 — 7-9 736 .0 11.0 78 — 17... 1130 11 793 — 7-9 — E730 .5 11.2 __ — 25... 1*135 E15 1040 — _- — 735 1.0 14.1 103 — 30... 1800 145 — 545 -_ 7-9 E730 3.0 11.6 -- __ 31. .. 1500 97 — — -- — E730 4.0 11.5 — 58 APR 01. .. 1215 62 625 — — _- 729 3.0 11.9 03 — 02.. . 1345 41 748 — — -- <705 7.5 10.3 -- -- 15... 1120 27 1040 976 — 8.3 E730 13.0 12.4 — — MAY 25... 1410 2.4 1390 1380 — 8.2 E730 16.0 8.9 _- 240 JUN 10. . . 1040 El.O — — — — — — — — — 23... 1420 .40 — — -- — — — ------JiJL 07... 1340 .35 1260 1260 8.1 8.0 E730 25.5 12.0 — K1700 22... 1310 .05 — — -- — -- — — -- -- STREP­ HARD­ ALKA­ TOCOCCI NESS MAGNE­ SODIUM POTAS­ BICAR­ LINITY, ALKA­ PECAL, HARD­ NONCAR- CALCIUM SIUM, SODIUM, AD­ SIUM, BONATE CARBON­ LINITY KP AGAR NESS BONATE DIS­ DIS­ DIS­ SORP­ DIS­ IT-PLD ATE LAB (COLS. (MG/L (MG/L SOLVED SOLVED SOLVED TION SOLVED (MG/L IT-?LD (MO/L PER AS AS (MG/L (MG/L (MG/L RATIO (MG/L AS CMO/L - AS DATE 100 ML) CAG03) CAC03) AS CA) ^S MOO AS NA) AS K) HC03) CAC03) CAC03) (31673) (00900) (95902) (00915) (00925) (00930) (0093D (00935) (99440) (99430) (90410) MAR 05... __ 771 570 195 69 14 .2 7-6 356 292 200 17... -- — — — 206 169 -- 25... — — — — — — — -- -- — -- 30... __ 262 140 67 23 7.7 .2 6.1 __ — 120 31... K4400 — — — — — — — -- __ — APR 01. .. — — — — -- — — — — — -- 02... — __ __ — __ — __ — — — -_ 15... — 522 320 130 48 15 .3 6.6 — — 200 MAY 25... 480 750 580 180 73 23 .4 7.5 — — 170 JUN 10. .. — — — — — — — — — -- — 23... — — -_ — ------— -- — -- JUL 07... 1100 646 440 150 66 15 .3 7.7 268 220 204 22... — — — — -- — — — — — —

SOLIDS, SOLIDS, NITRO­ NITRO­ SEDI­ CHLO­ PLUO- SILICA, RESIDUE SUM OP GEN, GEN, AM­ MENT, SULPATS RIDE, RIDE, DIS­ AT 180 CONSTI­ N02+N03 MONIA + PHOS­ SEDI­ DIS­ DIS­ DIS­ DIS­ SOLVED DEG. C TUENTS, DIS­ ORGANIC PHORUS, MENT , CHARGE, SOLVED SOLVED SOLVED (MG/L DIS­ DIS­ SOLVED TOTAL TOTAL SUS­ SUS­ (MG/L (MG/L (MG/L AS SOLVED SOLVED (MQ/L (MO/L (MG/L PENDED PENDED DATE AS S04) A3 CL) AS P) SI02) (MG/L) (MQ/L) AS N) AS N) AS P) (MG/L) (T/DAY) (00945) (00940) (00950) (00955) (70300) (70301) (00631) (00625) (00665) (80154) (80155) MAR 05... 580 9.0 .2 18 1110 1068 .63 .47 .030 — — - 17... -- — ------— — 9 .27 25... — — — — — — -- — — — -- 30... 170 8.5 .2 12 396 366 1.4 1.30 .340 — -- 31... — — -- — -- — -- — — -- -- APR 01... — — — -- — — — — — — -- 02... — ______15... 340 15 .3 16 797 691 1.2 .64 .080 36 2.6 MAY 25... 530 21 .3 12 1210 949 .27 .50 .020 35 .23 JUN 10. .. — — — — — — — — — 29 — 23... — -- — -- -- _- — — — 86 .09 JUL 07... 500 9.3 .3 20 1030 900 <.10 1.10 .040 37 .03 22... — — -- — — — — 81 .01 120 MINNESOTA RIVER BASIN 443916096174801 LAC QUI PARLE RIVER NEAR CANBY, MN—Continued

WATER QUALITY DATA, WATER YEAR MARCH TO SEPTEMBER 1982

MEAN MEAN CONCEN­ SEDIMENT DISCHARGE TRATION DISCHARGE DATE (CPS) (MG/L) (TONS/DAY) MAR 24... 20 60 3.2 25... 16 58 2.5 26... 27 56 4.1 27... 35 37 3-5 28... 102 75 9.6 29... 61 143 30 30... 102 422 170 31... 101 250 70 APR 01... 60 90 17 02... 46 36 4.5

SED. SED. SED. SED. SED. SED. SED. SED. SUSP. SUSP. SUSP. SUSP. SUSP. SUSP. SUSP. SUSP. FALL FALL FALL FALL FALL FALL FALL FALL DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. % FINER % FINER % FINER % FINER % FINER % FINER % FINER % FINER THAN THAN THAN THAN THAN THAN THAN THAN DATE .002 MM .004 MM .016 MM .062 MM .125 MM .250 MM .500 MM 1.00 MM (70337) (70338) (70340) (70342) (70343) (70344) (70345) (70346) MAR 30 48 53 78 65 99 100 31 48 53 76 94 96 100

BED BED BED BED BED BED BED BED BED MAT. MAT. MAT. MAT. MAT. MAT. MAT. MAT. MAT. SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. % FINER % FINER % FINER % FINER % FINER % FINER % FINER % FINER % FINER THAN THAN THAN THAN THAN THAN THAN THAN THAN DATE .062 MM .125 MM .250 MM .500 MM 1.00 MM 2.00 MM 4.00 MM 8.00 MM 16.0 MM (80164) (80165) (80166) (80167) (80168) (80169) (80170) (80171) (80172) APR 01 23 63 86 95 100 '1INNESOTA RIVER UASIN 121

05300000 LAC QUI PARLE RIVER NEAR LAC QUI PARLE, MN LOCATION.—Lat 44°59'42", long 95°55'09", in SWfcSWJ sec.27, T.118 N., R.42 W., Lac qui Parle County, Hydrologic Unit 07020003, on right bank HO ft (12 m) downstream from highway bridge and 0.5 mi (0.8 km) southwest of village of Lac qui Parle. DRAINAGE AREA.—983 mi 2 (2,546 km 2 ). PERIOD OP RECORD.—April 1910 to November 1914; March 1931 to current year (winter records incomplete prior to 1934). Published as "at Lac qui Parle," 1910-14. REVISED RECORDS.—WSP 1308: 1912(M), 193500 . GAGE.—Water-stage recorder. Datum of gage is 951.98 ft (290.164 ra) National Geodetic Vertical Datum of 1929 (Minnesota Department of Transportation benchmark). Apr. 27, 1910, to Nov. 15, 1914, nonrecording gage at site 2 mi (3 Km) downstream at different datum. Mar. 17, 1931, to Mar. 9, 1937, nonrecording gage at site 4o ft (12 m) upstream at present datum. REMARKS.—Records good except those for winter periods, which are fair. AVERAGE DISCHARGE.—51 years (water years 1913, 1932, 1934-82), 120 ft 3 /s (3.398 m 3 / s ) 1.66 in/yr (42 ram/yr), 86,940 acre-ft/yr (107 hmVyr); median of yearly mean discharges, 94 ft^/s (2.662 ITH/S), 1-30 in/yr (33 mm/yr), 68,100 acre-ft/yr (84 hmVyr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 17,100 ft 3 /s (484 m^/s) Apr. 10, 1969, gage height, 18.94 ft (5-773 m), from floodmark; maximum gage height, 19.37 ft (5-904 m) Apr. 9, 1965, from floodmark, (backwater from ice); no flow at times in several years. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 1,330 ft 3 /s (37-7 m3/s) Apr. 2, gage height, 5-37 ft (1.637 m); minimum, 0.38 ft 3 /s (0.011 m3 /s) Aug. 28, Sept. 28; minimum gage height, 0.27 ft (0.082 m) Nov. 27.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 198! TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 .74 5.0 2.3 2.7 2.0 9.0 836 64 40 10 11 5.0 2 1.1 5-3 2.3 2.7 2.0 10 1260 58 37 11 9.7 4.0 3 1.7 5.0 2.3 2.7 2.0 10 1040 55 36 13 8.4 3.0 4 4.0 4.3 2.3 2.7 2.0 10 535 52 37 13 7.5 2.5 5 5.3 4.0 2.3 2.7 2.0 9.5 429 47 34 12 6.7 2.7 6 6.4 3.0 2.1 2.3 2.0 8.0 445 44 37 14 7-5 2.7 7 6.7 2.7 2.1 1.9 2.0 7.0 429 44 41 15 6.0 2.5 8 6.4 2.5 1.9 1.5 2.0 5.5 348 43 35 17 5.3 2.3 9 6.0 2.7 1.9 1.3 1.9 4.5 308 40 40 18 4.3 2.3 10 6.4 3.2 1.9 1.3 1.9 4.5 274 43 47 23 4.6 2.1 11 6.0 2.7 1.9 1.3 1.5 6.5 252 40 45 36 4.6 1.9 12 5.6 3.0 2.3 1.3 1.5 12 245 40 48 90 4.6 3-0 13 9.3 2.9 2.5 1.3 1.5 15 237 49 42 90 4.3 3.2 14 16 2.7 2.3 1.3 1.5 25 232 50 38 64 4.3 2.5 15 18 2.7 2.3 1.3 3.0 25 231 63 34 62 4.3 2.5 16 11 2.7 2.3 1.3 3.0 18 213 69 29 62 4.3 2.5 17 9.8 2.7 2.1 1.3 3.0 19 192 82 25 55 4.3 2.5 18 8.8 2.7 1.7 1.3 3-0 110 170 106 22 43 4.0 2.1 19 9.3 2.7 1.5 1.3 3.5 95 152 99 20 43 3-2 2.1 20 11 2.7 1.5 1.3 3-5 65 144 93 18 41 2.1 2.1 21 9.3 2.5 2.3 1.3 4.5 145 132 82 17 34 1.9 1.9 22 7-9 2.5 2.9 1.3 5.5 137 125 76 15 32 2.1 1.9 23 7.5 2.7 2.9 1.3 5-5 65 117 68 14 27 1.7 1.7 24 8.4 2.7 2.9 1.3 5.5 40 112 62 13 23 1.9 1.5 25 7.9 2.7 2.9 1.3 6.4 68 104 58 11 19 1.3 1.1 26 7-9 2.7 2.9 1.3 7-5 62 96 55 10 21 1.1 .90 27 7.1 2.3 2.9 1.9 8.5 45 87 52 10 21 1.3 .74 28 6.7 2.3 2.9 2.0 8.5 45 80 49 10 17 .90 .60 29 6.0 2.3 2.9 2.0 —— 95 73 47 9.7 15 3.4 2.1 30 5.3 2.3 2.9 2.0 —— 150 68 44 8.8 13 4.6 2.1 31 4.3 2.7 2.0 —— 300 —— 46 —— 11 4.6 —— TOTAL 227.84 90.2 72.9 52.5 96.7 1620.5 8966 1820 823.5 965 135.80 68.04 MEAN 7.35 3.01 2.35 1.69 3.45 52.3 299 58.7 27.5 31.1 4.38 2.27 MAX 18 5-3 2.9 2.7 8.5 300 1260 106 48 90 11 5.0 MIN .74 2.3 1.5 1.3 1.5 4.5 68 40 8.8 10 .90 .60 CFSM .007 .003 .002 .002 .004 .05 .30 .06 .03 .03 .004 .002 IN. .01 .00 .00 .00 .00 .06 • 34 .07 .03 .04 .01 .00 AC-FT 452 179 145 104 192 3210 17780 3610 1630 1910 269 135 GAL YR 1981 TOTAL 5073 .58 MEAN 13.9 MAX 308 MIN .01 CFSM .01 IN .19 AC-FT 10060 WTR YR 1982 TOTAL 14938 .98 MEAN 40.9 MAX 1260 MIN .60 CFSM .04 IN .57 AC-FT 29630 122 MINNESOTA RIVER BASIN

05301000 MINNESOTA RIVER NEAR LAC QUI PARLE, MN LOCATION.—Lat 45°01'17", long 95°52'05", in MW4NE4 sec.24, T.118 N., R.42 W., Chippewa County, Hydrologic Unit 07020004, on left hank 200 ft (61 m) downstream from dam at Lac quI Parle Outlet, 2.4 mi (3-9 km) northeast of village of Lac qui Parle, and 3.5 mi (5.6 km) west of Watson. DRAINAGE AREA. — 4,050 mi 2 (10,500 km 2 ), approximately. PERIOD OP RECORD.—October 1942 to current year. GAGE.—Water-stage recorder. Datum of gage is 900.00 ft (274.320 m) National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to Nov. 10, 1944, at datum 0.20 ft (0.061 m) lower. REMARKS.—Records good. Part of flow from 2,050 mi 2 (5,310 km 2 ) of Chippewa River basin at times diverted into Minnesota River above station. Some regulation by Big Stone Lake since Apr. 17, 1937, Lac qui Parle since January 1938, Marsh Lake since Nov. 1, 1939, and Odessa Darn since May 1974. AVERAGE DISCHARGE.—40 years, 618 ft 3 / s (17-5 m 3 /s), 447,700 acre-ft/yr (552 hm3/yr ). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 29,400 ft 3 /s (833 m 3 /s) Apr. 12, 1969, gage height, 39-75 ft (12.116 m); no flow Nov. 17, 1942, Sept. 29, 1947, Oct. 19 to Nov. 18, 1951, Nov. 24, 1952, Dec. 9-11, 1976, Feb. 28 to Mar. 5, 1977. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 3,360 ft 3 /s (95.2 m 3 /s) Apr. 8, gage height, 31.45 ft (9-586 m); minimum, 13 ft 3 /s (0.37 m 3 /s) Sept. 17, gage height, 20.32 ft (6.194 m), due to regulation.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL SEP 1 19 202 90 123 68 282 1640 1630 920 225 227 52 2 19 271 102 123 68 277 2290 1610 1130 147 193 52 3 19 307 115 123 67 276 2860 1270 992 147 125 51 4 18 305 127 120 67 267 3040 657 800 147 121 51 5 17 307 142 119 68 264 3130 767 790 148 121 51 6 17 303 141 119 68 257 3240 974 790 147 123 49 7 19 303 142 121 67 257 3310 977 780 144 120 43 8 19 303 142 101 67 245 3340 977 773 147 118 23 9 19 305 143 71 67 213 3330 976 790 207 115 23 10 19 216 144 71 68 143 3280 889 822 331 115 24 11 19 139 152 71 68 145 3290 761 825 338 118 25 12 19 127 164 71 68 130 3250 792 822 396 88 27 13 20 95 163 72 67 113 3200 935 822 528 60 27 14 19 68 163 71 67 115 3190 1090 751 593 58 27 15 19 68 165 70 67 115 3140 1100 603 682 58 24 16 35 70 167 70 88 114 3090 1100 610 703 58 14 17 68 71 169 71 166 131 3040 1100 607 675 58 14 18 99 70 168 72 238 190 2980 1140 612 665 58 14 19 90 72 171 70 283 252 2840 1250 619 663 57 16 20 137 73 170 71 300 288 2200 1420 617 663 57 25 21 135 73 167 70 303 282 1480 1420 607 655 57 42 22 142 73 165 70 305 309 i860 1410 610 411 56 44 23 135 71 167 70 305 336 i860 1400 497 261 56 48 24 127 73 146 69 305 346 1850 1240 319 261 54 97 25 127 73 121 69 305 372 I860 766 298 256 54 165 26 132 76 120 70 300 475 1850 603 298 250 56 163 27 149 74 123 68 297 567 1810 689 1 295 248 54 153 28 166 74 123 68 288 569 1770 805 293 244 54 145 29 202 73 123 68 —— 615 1660 802 283 241 53 144 30 204 78 123 67 —— 800 1650 795 274 237 53 142 31 202 —— 121 70 —— 1140 —— 798 —— 236 53 —— TOTAL 2431 4413 4439 2559 4495 9885 77330 32143 19249 10996 2648 1775 MEAN 78.4 147 143 82.5 161 319 2578 1037 642 355 85.4 59.2 MAX 204 307 171 123 305 1140 3340 1630 1130 703 227 165 MIN 17 68 90 67 67 113 1480 603 274 144 53 14 AC-FT 4820 8750 8800 5080 8920 19610 153400 63760 38180 21810 5250 3520 GAL YR 1981 TOTAL 81606 MEAN 224 MAX 1470 MIN 17 AC-FT 161900 WTR YR 1982 TOTAL 172363 MEAN 472 MAX 3340 MIN 14 AC-FT 341900 123 MINNESOTA RIVER BASIN 05304500 CHIPPEWA RIVER NEAR MILAN, MN LOCATION.— Lat 45°06'39", long 95°47'57", in SEftSEi sec.l6, T.119 N., R.41 W. , Chippewa County, Hydrologic Unit 07020005, on right bank 800 ft (240 m) upstream from bridge on State Highway 40, 2.0 mi (3.2 km) upstream from small tributary, and 5.5 mi (8.8 km) east of Milan. DRAINAGE AREA. — 1,870 mi 2 (4,840 km 2 ), approximately. PERIOD OP RECORD. — March 1937 to current year. REVISED RECORDS. --WSP 1145: Drainage area. GAGE. — Water-stage recorder. Datum of gage is 959.69 ft (292.514 m) National Geodetic Vertical Datum of 1929. Prior to June 15, 1942, nonrecording gage on bridge 800 ft (240 m) downstream at same datum. REMARKS. — Records good except those for winter period, which are fair. Plow regulated by several small lakes above gage. AVERAGE DISCHARGE. — 45 years, 267 ft3/s (7.561 mVs), 1.94 in/yr (49 mra/yr), 193,400 acre-ft/yr (238 hmVyr); median of yearly mean discharges, 221 ft^/s (6.26 nws), 1.60 in/yr (41 rnm/yr), 160,000 acre-ft/yr (197 hnP/yr). EXTREMES FOR PERIOD OP RECORD.— Maximum discharge, 11,400 ftVs (323 m^/s) Apr. 9, 1969, gage height, 15.45 ft (4.709 m); no flow at times during 1940. EXTREMES FOR CURRENT YEAR. — Peak discharge above base of 400 ft 3 / s (11.3 m3/ s ) and maximum (*): Discharge Gage height Discharge Gage height Date Time (ft3 /s) (mVs) (ft) (m) Date Time (fWs) (mVs) (ft) (m) Apr. 2 0345 *3350 94.9 a*8.00 2.438 June 16 1030 668 18.9 3.28 1.000 a Backwater from ice. Minimum daily discharge, 21 ft 3/s (0.59 m3 /s) Jan. 22 to Peb. 14; minimum gage height, 1.61 ft (0.491 m) Oct. 1, 3.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 78 210 122 67 21 45 2470 1090 714 256 169 132 2 78 202 120 65 21 45 2820 1050 679 244 163 186 3 78 199 118 63 21 40 2800 1010 624 239 156 222 4 94 199 115 60 21 30 2530 975 568 228 149 218 5 115 205 112 58 21 35 2480 936 514 214 143 207 6 125 205 112 55 21 30 2580 899 502 221 135 204 7 121 205 110 53 21 30 2520 865 572 275 132 203 8 123 199 110 51 21 30 2320 832 527 302 123 197 9 125 188 108 49 21 30 2160 816 474 307 123 192 10 130 183 106 46 21 30 2160 822 444 337 119 182 11 130 180 105 44 21 35 2090 807 419 324 115 169 12 130 178 104 42 21 55 2060 820 403 311 111 175 13 141 178 102 38 21 70 1990 885 386 294 107 202 14 180 176 98 36 21 110 1910 926 375 276 102 234 15 258 173 96 34 22 130 1890 938 563 274 100 239 16 258 168 94 31 22 125 1810 925 654 284 99 235 17 249 166 92 28 24 145 1760 923 606 285 95 231 18 261 163 90 26 25 155 1700 951 555 270 101 228 19 305 166 90 24 26 240 1650 977 507 256 118 220 20 302 142 88 23 27 330 1590 961 467 242 106 207 21 283 129 88 22 29 290 1540 926 430 231 96 198 22 271 138 87 21 30 280 1490 891 397 220 92 190 23 258 135 85 21 32 310 1450 875 365 203 97 180 24 255 132 83 21 34 400 1410 845 336 194 109 170 25 246 132 80 21 38 490 1350 817 323 188 108 162 26 246 132 79 21 35 480 1290 786 312 198 109 155 27 240 130 77 21 35 520 1240 761 297 225 110 151 28 237 129 75 21 35 490 1200 743 280 226 103 148 29 228 128 73 21 575 1150 728 274 206 114 157 30 219 125 71 21 —— 1140 1120 799 265 192 120 161 31 213 —— 69 21 —— 1680 —— 752 —— 179 122 —— TOTAL 5977 4995 2959 1125 708 8395 56530 27331 13832 7701 3646 5755 MEAN 193 167 95.5 36.3 25.3 271 1884 882 461 248 118 192 MAX 305 210 122 67 38 1680 2820 1090 714 337 169 239 MIN 78 125 69 21 21 •30 1120 728 265 179 92 132 CPSM .10 .09 .05 .02 .01 .15 1.01 .47 .25 .13 .06 .10 IN. .12 .10 .06 .02 .01 .17 1.12 .54 .28 .15 .07 .11 AC- FT 11860 9910 5870 2230 1400 16650 112100 54210 27440 15270 7230 11420 CAL YR 1981 TOTAL 83779 MEAN 230 MAX 2510 MIN 37 CPSM .12 IN 1.67 AC-PT 166200 WTR YR 1982 TOTAL 138954 MEAN 381 MAX 2820 MIN 21 CFSM .20 IN 2.76 AC-PT 275600 124 MINNESOTA RIVER BASIN

05311000 MINNESOTA RIVER AT MONTEVIDEO, MN LOCATION.—Lat 44°56'00", long 95°44'00", in NWJNW4 sec.19, T.117 N., R.40 W., Yellow Medicine County, Hydrologic Unit 07020004, on right bank 100 ft (§0 m) upstream from bridge on U.S. Highway 212, at Montevideo, and 400 ft (122 m) downstream from Ghippewa River. DRAINAGE AREA. — 6,180 mi 2 (16,000 km 2 ), approximately. PERIOD OP RECORD.—July 1909 to September 1917, October 1917 to September 1929 (no winter records), October 1929 to current year. Prior to October 1939, published as "near Montevideo." Monthly discharge only for some periods, published in WSP 1308. REVISED RECORDS.—WSP 1035: 1919(M). WSP 1085: 1935-36. WSP 1508: 1912, 1925(M), 1929(M). GAGE.—Water-stage recorder. Datum of gage is 909.12 ft (277.100 m) National Geodetic Vertical Datura of 1929. July 22, 1909, to Feb. 4, 1932, nonrecording gage at bridge 600 ft (183 m) downstream at present datum. Feb. 5, 1932, to Nov. 26, 1934, nonrecording gage at bridge 100 ft (30 m) downstream at present datum. REMARKS.—Records good except those for winter period, which are fair. Flow regulated by Big Stone Lake since Apr. 17, 1937, Lac qui Parle since January 1938, and Marsh Lake since Nov. 1, 1939. AVERAGE DISCHARGE.—61 years (water years 1910-17, 1930-82), 67§ ft 3 /s (19.20 raVs), 491,200 acre-ft/yr (606 hm-Vyr); median of yearly mean discharges, 547 ftVs (15.5 nP/s), 396,000 acre-ft/yr (488 hm-Vyr). EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 35,100 ft 3 /s (994 m3/s) Aor. 12, 1969, gage height, 21.68 ft (6.608 m), from high-water mark; no flow for several days in 1933-34, 1936. EXTREMES FOR CURRENT YEAR.--Maximum discharge, 4,270 ftVs (121 mVs) Apr. 11, 12, gage height, 12.28 ft (3.743 m); minimum discharge, 34 ft^/s (0.96 m-Vs) Sept. 9, 17, 19, result of regulation; minimum gage height, 1.17 ft (0.357 m) Sept. 19, 20.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 59 326 165 150 87 315 2140 2080 1040 357 312 68 2 59 335 180 145 87 305 2800 2060 1280 243 304 65 3 66 433 185 145 87 300 3340 I960 1280 185 214 62 4 78 447 190 145 87 290 3610 1370 946 175 17^ 63 5 64 449 190 145 87 285 3790 1190 872 171 168 67 6 60 449 195 140 87 280 3900 1280 887 185 166 66 7 60 445 195 140 87 225 4020 1300 863 185 163 64 8 61 444 195 140 87 175 4110 1300 893 170 158 54 9 65 443 195 120 87 150 4170 1290 897 180 155 34 10 91 356 195 87 87 165 4240 1270 928 326 154 50 11 91 241 195 87 87 150 4250 962 939 370 154 39 12 93 225 220 87 87 165 4260 917 953 379 155 55 13 111 223 220 87 87 160 4230 1000 938 486 106 46 14 108 160 220 87 87 195 4210 1270 929 546 82 44 15 94 138 215 87 87 180 4180 1330 768 640 81 50 16 93 134 215 87 87 130 4130 1340 739 676 78 43 17 130 134 215 87 120 115 4070 1340 817 676 76 36 18 180 134 210 87 205 130 4010 1360 835 654 76 35 19 181 133 210 87 285 210 3930 1410 776 654 73 35 20 310 129 210 87 340 375 3660 1640 747 651 70 36 21 350 124 205 87 350 405 2560 1690 738 674 70 46 22 350 136 205 87 357 420 2550 1690 725 595 72 60 23 362 140 205 87 340 435 2550 1690 702 352 72 61 24 352 136 205 87 320 455 2520 1650 515 330 72 67 25 350 136 165 87 320 480 2500 1210 450 326 68 171 26 348 135 155 87 320 556 2470 897 443 330 68 217 27 362 130 155 87 320 701 2350 867 439 322 74 218 28 370 120 150 87 315 743 2260 1000 436 320 72 202 29 344 130 150 87 794 2140 1030 411 316 78 211 30 334 125 150 87 —— 1030 2100 1020 394 314 74 193 31 330 —— 150 87 —— 1480 —— 1030 —— 314 68 —— TOTAL 5906 7090 5910 3184 4984 11799 101050 41443 23585 12102 3707 2458 MEAN 191 236 191 103 178 381 3368 1337 786 390 120 81.9 MAX 370 449 220 150 357 1480 4260 2080 1280 676 312 218 MIN 59 120 150 87 87 115 2100 867 394 170 68 34 AC-FT 11710 14060 11720 6320 9890 23400 200400 82200 46780 24000 7350 4880 GAL YR 1981 TOTAL 118458 MEAN 325 MAX 2060 MIN 59 AC-FT 235000 WTR YR 1982 TOTAL 223218 MEAN 612 MAX 4260 MIN 34 AC-FT 442800 MINNESOTA RIVER BASIN 125

443636096095402 DILLON-SYLTIE IMPOUNDMENT INLET NEAR PORTER, MN LOCATION.—Lat 44°36'05", long 96°10'22", in NWiNWJ sec.l6, T.113 N., R.44 W., Lincoln County, Hydrologic Unit 07020004, 0.15 mi (0.24 km) downstream of bridge on County Highway 7, 2.2 mi (3.5 km) south of Porter. DRAINAGE AREA.—4.78 mi 2 (12.37 km 2 ). WATER-DISCHARGE RECORDS PERIOD OP RECORD.—January 1980 to current year. GAGE.—Water-stage recorder and crest-stage gage . REMARKS.—Water-stage recorder operated only during open-water period. Records good except those for Mar. 1 to May 13, 1980, Feb. 24 to Mar. 20, 1981, and Feb. 25"to Mar. 30, 1982, which are poor. EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 193 ft 3 /s (5.47 m3 /s) June 5, 1980, gage height, 30.73 ft (9.367 m); no flow on many days each year. EXTREMES POR CURRENT PERIOD.—January to September 1980: Maximum discharge during period, 193 ft 3 /s (5.47 m3 /s) June 5, gage height, 30.73 ft (9.367 m); no flow on many days. Water year 1981: Maximum discharge, 12 ftVs (0.34 m 3 /s) July 24, gage height, 29.53 ft (9.001 m); no flow on many days. Water year 1982: Maximum discharge, 37 ftVs (1.05 m 3 /s) Mar. 30, gage height, 29-97 ft (9-135 m); no flow on many days.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1979 TO SEPTEMBER 1980 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR HAY JUN JUL SEP

1 .00 .00 .00 .30 .00 .00 .05 .02 .00 2 .00 .00 .00 .20 .00 .00 .00 1.5 .00 3 .00 .00 .00 .07 .00 .00 .00 .07 .00 4 .00 .00 .00 .05 .00 .30 .30 .00 .00 5 .00 .00 .00 .04 .00 57 -37 .00 .00 6 .00 .00 .00 .03 .00 5.7 -07 .00 .00 7 .00 .00 .00 .02 .00 19 .00 .00 .00 8 .00 .00 .00 .20 .00 3.4 .00 .00 .00 9 .00 .00 .00 .20 .02 1.4 .00 .00 .00 10 .00 .00 .00 .50 -05 .80 .00 .00 .00

11 .00 .00 .00 .40 -05 .49 .00 .00 .00 12 .00 .00 .02 .20 .12 .29 .00 .00 .00 13 .00 .00 .02 .10 .06 .25 .00 .00 .00 14 .00 .00 .02 .03 .15 .20 .00 .00 .00 15 .00 .00 5.0 .00 .05 .08 .00 .00 .00 16 .00 .00 30 .00 .00 .00 .33 .07 .00 17 .00 .00 13 .00 .03 .00 .10 1.1 .00 18 .00 .00 4.0 .00 .38 .21 .00 .41 .00 19 .00 .00 21 .00 .50 .06 .00 .20 .00 20 .00 .00 3.5 .00 .21 .00 .00 .20 .00 21 .00 .00 1.7 .00 .03 .00 .00 .00 .00 22 .00 .00 1.0 .00 .00 .00 .00 .00 .00 23 .00 .00 .50 .00 .00 .00 .00 .00 .00 24 .00 .00 .40 .00 .00 .65 .00 , .00 .00 25 .00 .00 .30 .00 .00 3.2 .00 .00 .00 26 .00 .00 -30 .00 .00 .93 .00 .00 .00 27 .00 .00 .20 .00 .00 1.1 .00 .00 .00 28 .00 .00 .20 .00 .00 .70 .00 .00 .00 29 .00 .00 1.5 .00 .00 .33 .00 .00 .00 30 .00 —— .50 .00 .00 .14 .00 .00 .00 31 .00 — .40 — .00 —— .00 .00 —— TOTAL .00 .00 83-56 2.34 1.65 96.23 1.22 3.57 .00 MEAN ,000 .000 2.70 .078 .053 3.21 .039 .12 .000 MAX .00 .00 30 .50 .50 57 .37 1.5 .00 MIN .00 .00 .00 .00 .00 .00 .00 .00 .00 AC-FT .00 .00 166 4.6 3-3 191 2.4 7-1 .00 126 MINNESOTA RIVER 0ASIN

443636096095402 DILLON-SfLriE IMPOUNDMENT INLET NEAR PORTER, MN—Continued

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1980 TO SEPTEMBER 1981 MEAN VALUES

DA/ OCT NOV D3C JAM FSB MAR APR HAY JUN JUL AUG SEP

1 .00 .00 .00 .00 .00 .02 3.1 -27 .00 .00 .00 .00 ? .00 .00 .00 .00 .00 .02 2.2 .23 .00 .00 .00 .00 3 .00 .00 .00 .00 .00 .02 1.7 .25 .00 .00 .00 .00 4 .00 .00 .00 .00 .00 .02 1.7 -35 .00 .00 .00 .00 5 .00 .00 .00 .00 .00 .02 1.7 .41 .00 .00 .00 .00

6 .00 .00 .00 .00 .00 .02 1.4 .27 .00 .00 .00 .00 7 .00 .00 .00 .00 .00 .02 1.1 .17 .00 .00 .00 .00 8 .00 .00 .00 .00 .00 .02 .87 .07 .00' .00 .00 .00 9 .00 .00 .00 .00 .00 .04 .81 .00 .00 ; .00 .00 .00 10 .00 .00 .00 .00 .00 .04 .76 .00 .00 .00 .00 .00

11 .00 .00 .00 .00 .00 .10 .65 .00 .00 .00 .00 .00 12 .00 .00 .00 .00 .00 .10 .70 .00 .00 .00 .00 .00 13 .00 .00 .00 .00 .00 .10 .81 .00 .00 .00 .00 .00 14 .00 .00 .00 .00 .00 .10 .87 .00 .05 ."0 .00 .00 15 .00 .00 .00 .00 .00 .10 .81 .00 1.2 .00 .00 .00

16 .00 .00 .00 .00 .00 .10 .50 .00 .76 .00 .00 .00 17 .00 .00 .00 .00 .00 .10 .50 .00 .07 .00 .00 .00 13 .00 .00 .00 .00 .00 .10 .41 .00 .02 .00 .00 .00 19 .00 .00 .00 .00 .00 .10 .37 .00 .00 .00 .00 .00 20 .00 .00 .00 .00 .00 .10 .33 .00 .00 .00 .00 .00

21 .00 .00 .00 .00 .00 .10 .46 .00 .00 .00 .00 .00 22 .00 .00 .00 .00 .00 .10 .55 .00 .00 .00 .00 .00 23 .00 .00 .00 .00 .00 .10 .69 .00 .00 .21 .00 .00 24 .00 .00 .00 .00 .01 .10 .51 .00 .00 6.0 .00 .00 25 .00 .00 .00 .00 .01 .10 .04 .00 .00 1.9 .00 .00

26 .00 .00 .00 .00 .01 .20 .00 .00 .00 .33 .00 .00 27 .00 .00 .00 .00 .01 .20 .00 .00 .00 .00 .00 .00 28 .00 .00 .00 .00 .01 .20 .00 .00 .00 .00 .00 .00 29 .00 .00 .00 .00 —— 7.1 .00 .00 .00 .00 .00 .00 30 .00 .00 .00 .00 —— '1.5 .19 .00 .00 .00 .00 .00 31 .00 —— .00 .00 —— 3.2 —— .00 —— .00 .00 ——

TOTAL .00 .00 .00 .00 .05 17-14 23-73 2.02 2.10 8.44 .00 .00 MEAW .000 .000 .000 .000 .002 .55 -79 .065 .070 .27 .000 .000 MAX .00 .00 .00 .00 .01 7.1 3-1 -41 1.2 6.0 .00 .00 MIN .00 .00 .00 .00 .00 .02 .00 .00 .00 .00 .00 .00 AC-FT .00 .00 .00 .00 .10 34 47 4.0 4.2 17 -00 .00

CAL XR 1980 TOTAL 188-57 MEAN .52 MAX 57 MIW .00 AC-FT 374 .fTR YR 1981 TOTAL 53-48 flEAN .15 '4AX 7-1 r«W -00 AC-PT 106 MINNESOTA RIVER BASIN1 12? 443636096095402 DILLON-S/LTIE IMPOUNDMENT INLET NEAR PORTER, MN

DISCHARGE, IN CUBIC FEET PER 3ECOMD, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VAhUK3

DAY OCT MOV DEC .JAN PEB MAR APR MAY JUN JUL AUG SEP 1 .00 .00 .00 .00 .00 .35 4.4 .71 .80 .00 .00 .00 2 .00 .00 .00 .00 .00 1.5 4.1 .63 .40 .00 .00 .00 3 .00 .00 .00 .00 .00 1.9 4.3 .57 .23 .00 .00 .00 4 .00 .00 .00 .00 .00 1.5 2.0 .50 .13 .00 .00 .00 5 .00 .00 .00 .00 .00 1.2 1.7 .43 .05 .00 .00 .00 6 .00 .00 .00 .00 .00 1.1 1.3 .39 .14 .00 .00 .00 7 .00 .00 .00 .00 .00 1.0 1.4 .33 .29 1.9 .00 .00 8 .00 .00 .00 .00 .00 1.0 1.4 .28 .23 .76 .00 .00 9 .00 .00 .00 .00 .00 1.0 1.7 .25 .15 .88 .00 .00 10 .00 .00 .00 .00 .00 1.3 2.0 .32 .20 1.1 .00 .00 11 .00 .00 .00 .00 .00 2.0 2.6 .56 .11 .34 .00 .00 12 .00 .00 .00 .00 .00 2.6 3.3 .64 .04 .13 .00 .00 13 .00 .00 .00 .00 .00 4.5 3.0 1.3 .00 .01 .00 .00 14 .00 .00 .00 .00 .00 10 2.5 1.3 .00 .00 .00 .00 15 .00 .00 .00 .00 .00 11 2.4 1.7 .00 .14 .00 .00 16 .00 .00 .00 .00 .00 9.0 2.6 1.3 .00 .30 .00 .00 17 .00 .00 .00 .00 .00 7.5 2.5 • 90 .00 .15 .00 .00 18 .00 .00 .00 .00 .00 6.0 1.8 .74 .00 .01 .00 .00 19 .00 .00 .00 .00 .00 3.5 1.6 .69 .00 .00 .00 .00 20 .00 .00 .00 .00 .00 1.9 1.9 .48 .00 .00 .00 .00 21 .00 .00 .00 .00 .00 1.3 2.4 .39 .00 .00 .00 .00 22 .00 .00 .00 .00 .00 1.1 1.9 .37 .00 .00 .00 .00 23 .00 .00 .00 .00 .00 1.8 1.6 .31 .00 .00 .00 .00 24 .00 .00 .00 .00 .00 2.5 1.3 .24 .00 .00 .00 .00 25 .00 —— .00 .00 .03 4.0 1.1 .23 .00 .15 .00 .00 26 .00 _ _ .00 .00 .05 3-5 1.0 .34 .00 .01 .00 .00 27 .00 —— .00 .00 .10 3.0 .87 .56 .00 .00 .00 .00 28 .00 —— .00 .00 .13 2.5 .76 .55 .00 .00 .00 .00 29 .00 —— .00 .00 —— 13 .74 .39 .00 .00 .00 .00 30 .00 —— .00 .00 —— 21 .71 .34 .00 .00 .00 .00 31 .00 —— .00 .00 — 6.0 —— .85 — .00 .00 — TOTAL .00 _ _ .00 .00 .31 129.55 61.38 18.59 2.77 5.88 .00 .00 MEAN .000 —— .000 .000 .011 4.18 2.05 .60 .092 .19 .000 .000 MAX .00 —— .00 .00 .13 21 4.4 1.7 .80 1.9 .00 .00 MIN .00 —— .00 .00 .00 .35 .71 .23 .00 .00 .00 .00 AC-PT .00 —— .00 .00 .6 257 122 37 5.5 12 .00 .00 128

443636096095402 DILLON-SYLTR IMPOUNDMENT INLET NEAR PORTER, MN—Continued

PERIOD OP RECORD.—Water years 1980 to current year. REMARKS.--Letter K indicates non-ideal colony count. Letter E indicates estimated value.

WATER QUALITY DATA, WATER YEAR MARCH TO SEPTEMBER 1982

SPE­ BARO­ OXYGEN, COLI- SPE­ CIFIC METRIC DIS­ PORM, STREAM- CIFIC CON­ PH PRES­ SOLVED PECAL, PLOW, CON­ DUCT­ PH LAB SURE OXYGEN, ( PER­ 0.7 INSTAN­ DUCT­ ANCE (STAND­ (STAND­ (MM TEMPER­ DIS­ CENT UM-MP TIME TANEOUS ANCE LAB ARD ARD OP ATURE SOLVED SATUR­ (COLS./ DATE (CPS) (UMHOS) (UMHOS) UNITS) UNITS) HO) (DEG C) (MG/L) ATION) 100 ML) (00061) (00095) (90095) (00400) (00403) (00025) (00010) (00300) (00301) (31625) MAR 05... 1030 .10 991 — 7.4 — E730 .0 10.0 — — 17... 1100 7.6 828 — 7.8 -- 733 .5 12.8 93 -- 25... 1515 E2.5 985 — — — E725 1.0 12.4 — — 31... 1130 6.2 854 900 — 8.1 731 3.5 11.5 91 K8 APR 01. .. 1100 4.4 951 — _ — 733 4.5 11.1 89 — 02... 1130 4.1 1010 — — — 711 6.5 9.5 83 — 14... 1416 2.4 1060 1010 — 8.1 E730 1.5 14.1 — — MAY 25... 0850 .20 1146 1150 — 8.1 E730 13.5 5.8 — 1500 JUN 10. .. 1015 .60 — — -- — — -- — — — STREP­ HARD­ ALKA­ TOCOCCI NESS MAGNE­ SODIUM POTAS­ BICAR­ LINITY, ALKA­ PECAL, HARD­ NONCAR- CALCIUM SIUM, SODIUM, AD­ SIUM, BONATE CARBON­ LINITY KP AGAR NESS BONATE DIS­ DIS­ DIS­ SORP­ DIS­ IT-PLD ATE LAB (COLS. (MG/L (MG/L SOLVED SOLVED SOLVED TION SOLVED (MG/L IT-PLD (MG/L PER AS AS (MG/L (MG/L (MG/L RATIO (MG/L AS (MG/L - AS DATE 100 ML) CAC03) CAC03) AS CA) AS MG) AS NA) AS K) HC03) CAC03) CAC03) (31673) (00900) (95902) (00915) (00925) (00930) (0093D (00935) (99440) (99430) (90410) MAR 05... 17... 263 215 25... 31... 1600 477 240 115 46 17 .3 4.3 240 APR 01... 02... 14... — 563 300 138 53 19 .4 4.3 — — 260 MAY 25... 820 601 290 150 55 20 .4 3.6 — — 309 JUN 10... — — — — _- — — — — — —

SOLIDS, SOLIDS, NITRO­ NITRO­ SEDI­ CHLO­ PLUO- SILICA, RESIDUE SUM OP GEN, GEN , AM- MENT, SULPATE RIDE, RIDE, DIS­ AT 180 CONSTI­ N02+N03 MONIA + PHOS­ SEDI­ DIS­ DIS­ DIS­ DIS­ SOLVED DEG. C TUENTS , DIS­ ORGANIC PHORUS, MENT, CHARGE, SOLVED SOLVED SOLVED (MG/L DIS­ DIS­ SOLVED TOTAL TOTAL SUS­ SUS­ (MG/L (MG/L (MG/L AS SOLVED SOLVED (MG/L (MG/L (MG/L PENDED PENDED DATE AS S04) AS CL) AS P) SI02) (MG/L) (MG/L) AS N) AS N) AS P) (MG/L) (T/DAY) (00945) (00940) (00950) (00955) (70300) (70301) (0063D (00625) (00665) (80154) (80155) MAR 05... — — — — __ — — — — — — 17... — — — __ — — — — — 0 .00 25... — — — — __ __ — — — 12 — 31... 300 5.5 .3 18 698 650 1.8 <.10 .100 10 .17 APR 01. .. — — — _- __ — — — — 9 .11 02... — — — — — — — — — 12 .13 14... 340 5.6 .3 16 817 732 .60 .50 .060 50 .32 MAY 25... 370 5.0 .4 12 968 801 <.10 .40 .050 64 .03 JUN 10... — — — — — — — — — 79 .13

SED. BED BED BED BED BED BED BED BED SUSP. MAT. MAT. MAT. MAT. MAT. MAT. MAT. MAT. SIEVE PALL PALL PALL PALL PALL SIEVE SIEVE SIEVE DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. % PINER % PINER % PINER % PINER % PINER % PINER % PINER % PINER % PINER THAN THAN THAN THAN THAN THAN THAN THAN THAN DATE .062 MM .004 MM .062 MM .125 MM .250 MM .500 MM 1.00 MM 2.00 MM 4.00 MM (7033D (80157) (80158) (80159) (80160) (80161) (80168) (80169) (80170)

73 39 72 76 86 94 97 99 100 129 MINNESOTA RIVER BASIN 443636096095400 DILLON-S*L,TIE IMPOUNDMENT NEAR PORTER, MN LOCATION.—Lat 44°36'36", long 96°09'54", in center of sec.9, T.113 N., R.44 W., Lincoln County, Hydrologic Unit 07020004, 0.5 mi (0.8 km) east of County Highway 7, 1.6 mi (2.6 km) south of Porter, MN. DRAINAGE AREA. —4.8 mi 2 (12.4 km 2 ). WATER-DISCHARGE RECORDS PERIOD OF RECORD.—May to November 1980, March to September 1981, March to September 1982. GAGE.—Water-stage recorder and crest-stage gage. REMARKS.—Water-stage recorder operated only during open-water period. Records good. Artificial lake with concrete box drop structure into 36-inch corrugated metal culvert through earthen dam. Point of zero flow at outlet, gage height, 17.49 ft. EXTREMES FOR PERIOD OF RECORD.—Maximum gage height, 18.66 ft (5.688 m) June 5, 1980; minimum recorded, 16.20 ft (4.938 m) Nov. 3, 1980. EXTREMES FOR CURRENT PERIOD.—May to September 1980: Maximum gage height during period, 18.66 ft (5.688 m) June 5; minimum, 16.60 ft (5.060 m) Sept. 30. October to November 1980, March to September 1981: Maximum gage height during period, 18.03 ft (5.4Q6 m) Mar. 30; minimum 16.20 ft (4.938 m) Nov. 3- March to September 1982: Maximum gage height during period, 18.50 ft (5.639 m) Mar. 30; minimum, 16.73 ft (5.099 m) Sept. 28.

MONTHEND GAGE HEIGHT, IN FEET, MAY TO SEPTEMBER 1980

May 31 ...... 17.43 July 31 ...... 17.29 Sept. 30 ...... 16.6l June 30 ...... 17.83 Aug. 31 ...... 17.16

MONTHEND GAGE HEIGHT, IN FEET, OCTOBER 1980, MARCH TO SEPTEMBER 1981

Oct. 31 ...... 16.24 Feb. 29 ...... —— June 30 ...... 17.00 Nov. 30 ...... —— Mar. 31 ...... 18.00 July 31 ...... 17.33 Dec. 31 ...... —— Apr. 30 ...... 17-71 Aug. 31 ...... 16.89 Jan. 31 ...... —— May 31 ...... 17.19 Sept. 30 ...... 16.35

MONTHEND GAGE HEIGHT, IN FEET, MARCH TO SEPTEMBER 1982

Mar. 31 ...... 18.24 June 30 ...... 17.42 Aug. 31 ...... 17.04 Apr. 30 ...... 17.76 July 31 ...... 17.62 Sept. 30 ...... 16.82 May 31 ...... 17.81 130 MINNESOTA RIVER BASIN

443636096095400 DILLON-SYLTE IMPOUNDMENT NEAR PORTER, MN—Continued PERIOD OF RECORD.—Water years 1980 to current year. REMARKS.—Letter E Indicates estimated value.

WATEK QUALITY DATA, WATER YEAR FEBRUARY TO SEPTEMBER 1982 SPE­ BARO­ SPE­ CIFIC METRIC CIFIC CON­ PH PRES­ SAM­ RESER­ CON­ DUCT­ PH LAB SURE TEMPER­ PLING VOIR DUCT­ ANCE (STAND­ (STAND­ (MM ATURE, TIME DEPTH DEPTH ANCE LAB ARD ARD OF AIR DATE (FEET) ( FEET ) (UMHOS) (UMHOS) UNITS) UNITS) HG) (DEG C) (00003) (72025) (00095) (90095) (00400) (00403) (00025) (00020) MAR 05... 1130 — 12 — 990 — 7.7 — — APR 21. .. 0950 12.0 12 962 — — — E730 21.0 MAY 25... 1100 — 13 1030 — — — — 13.0 JUL 07... 1150 3.00 — 961 — — — 735 — 22... 1315 12.7 — 947 — — — 738 29.0 AUG 04... 1110 6.00 13 903 874 — 8.3 732 28.0 19... 0935 12.0 13 900 — — — E730 32.0 31... 1145 12.0 — 873 866 — 8.6 729 — SEP 15... 1000 6.00 13 851 — 8.3 — 737 — 29... 0954 3.00 870 867 8.0 723 — —

SOLIDS, NITRO­ TRANS­ MAGNE­ CHLO­ SILICA, RESIDUE NITRO­ GEN, PAR­ HARD­ CALCIUM SIUM, RIDE, DIS­ AT 180 GEN, N02+N03 ENCY NESS DIS­ DIS­ DIS­ SOLVED DEG. C N02+N03 DIS­ (SECCHI (MG/L SOLVED SOLVED SOLVED (MG/L DIS­ TOTAL SOLVED DISK) AS (MG/L (MG/L (MG/L AS SOLVED (MG/L (MG/L DATE (M) CAC03) AS CA) AS MG) AS CL) SI02) (MG/L) AS N) AS N) (00078) (00900) (00915) (00925) (00940) (00955) (70300) (00630) (0063D MAR 05... 1.40 545 121 59 7.5 16 771 — 2.0 APR 21... 1.40 — — __ — — — .38 — MAY 25... .92 — • — — — — <.10 — JUL 07... .82 — — — — — — — .71 22... 1.89 — — — — — — — — AUG 04... 1.19 438 88 53 4.7 10 760 <.10 <.10 19... .70 — — — — — — <.10 — 31... 1.77 447 85 57 4.8 6.6 624 — <.10 SEP 15... 1.01 — — __ — — — — — 29... .70 421 81 53 5.9 5.1 662 —— <.10

NITRO­ NITRO­ NITRO­ PHOS­ CHLOR-A CHLOR-B NITRO­ GEN, GEN, AM­ GEN, AM­ PHOS­ PHORUS, PHYTO- PHYTO- GEN, AMMONIA MONIA + MONIA + PHOS­ PHORUS, ORTHO, PLANK- PLANK- AMMONIA DIS­ ORGANIC ORGANIC PHORUS, DIS­ DIS­ TON TON TOTAL SOLVED TOTAL DIS. TOTAL SOLVED SOLVED CHROMO CHROMO (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L FLUOROM FLUOROM DATE AS N) AS N) AS N) AS N) AS P) AS P) AS P) (UG/L) (UG/L) (00610) (00608) (00625) (00623) (00665) (00666) (00671) (70953) (70954) MAR 05... — .290 — 1.6 .180 .120 .150 — __ APR 21... .060 — .54 — .020 — — 12.5 <.100 MAY 25... .260 — .80 — .040 — — 24.0 <.100 JUL 07... — .250 — 1.1 .090 .030 .040 22.0 <.100 22... — — — — .070 — — — — AUG 04... .200 .060 .80 1.3 .050 .050 .060 22.0 <.100 19... .050 — 2.70 — .120 — — — -- 31... — .050 — .50 .060 .020 <.010 15.0 <.100 SEP 15... — — — — .080 — — — — 29... — .040 — 1.3 .080 .040 <.010 24.0 <.100 MINNESOTA RIVER BASIN 131

113636096095400 DILLON-SYLTE IMPOUNDMENT NEAR PORTER, MN—Continued

WATER QUALITY DATA, WATER YEAR FEBRUARY TO SEPTEMBER 1982

SOLIDS, NITRO­ NITRO­ NITRO­ PHOS­ ARSENIC BARIUM, BERYL­ CADMIUM CHRO­ VOLA­ GEN GEN, NH1 GEN, NH4 PHORUS, TOTAL RECOV. LIUM, RECOV. MIUM, TILE IN N02+N03 TOTAL + ORG. TOTAL IN BOT­ PM BOT­ RECOV. PM BOT­ RECOV. BOTTOM TOT. IN IN BOT. TOT IN IN BOT. TOM MA­ TOM MA­ PM BOT­ TOM MA­ PM BOT­ MA­ BOT MAT MAT. BOT MAT MAT. TERIAL TERIAL TOM MA­ TERIAL TOM MA­ TIME TERIAL (MG/KG (MG/KG (MG/KG (MG/KG (UG/G (UG/G TERIAL (UG/G TERIAL DATE (MO/KG) AS N) AS N) AS N) AS P) AS AS) AS BA) (UG/G) AS CD) (UG/G) (00196) (00633) (00611) (00626) (00668) (01003) (01008) (01013) (01028) (01029) JUL 07... 1150 169000 9.0 110 63000 510 <1 110 <1 <1

COPPER, IRON, LEAD, MANGA­ MERCURY NICKEL, ZINC, CARBON, CARBON, CYANIDE RECOV. RECOV. RECOV. NESE, RECOV. RECOV. RECOV. ORGANIC INOR­ TOTAL PM BOT­ PM BOT­ PM BOT­ RECOV. PM BOT­ PM BOT­ PM BOT­ TOT. IN GANIC, IN BOT­ TOM MA­ TOM MA­ TOM MA­ PM BOT­ TOM MA­ TOM MA­ TOM MA­ BOTTOM TOT IN TOM MA­ TERIAL TERIAL TERIAL TOM MA­ TERIAL TERIAL TERIAL MAT. BOT MAT TERIAL (UG/G (UG/G (UG/G TERIAL (UG/G (UG/G (UG/G (G/KG (G/KG (UG/G DATE AS CU) AS PE) AS PB) (UG/G) AS HG) AS NI) AS ZN) AS C) AS C) AS CN) (01013) (01170) (01052) (01053) (71921) (01068) (01093) (00687) (00686) (00721) JUL 07. 25 11000 30 1100 .01 30 61 10 18 <1

OXYGEN, SPE­ DIS­ CIFIC SOLVED SAM­ CON­ OXYGEN, (PER­ PLING DUCT­ TEMPER­ DIS­ CENT TIME DEPTH ANCE ATURE SOLVED SATUR­ DATE (PEET) (UMHOS) (DEG C) (MG/L) ATION) (00003) (00095) (00010) (00300) (00301) PEB 12.., 1133 3.00 __ 3.0 5.0 __ 12... 1135 6.00 — 1.0 1.9 — 12. ., 1138 9.00 — 1.0 5.0 — 12... 1110 10.0 — 1.5 5.7 — 12.., 1113 11.0 — 5.0 6.1 — 12... 1115 11.5 — 5.0 6.1 — MAR 05... 1133 2.10 790 .5 9.1 __ 05... 1136 1.00 897 1.0 8.0 — 05.., 1139 6.00 1200 2.0 5.8 — 05... 1112 8.00 1300 3.5 1.2 — 05... 1115 10.0 1310 3.5 1.1 — 05... 1118 11.5 1320 3.5 1.0 — APR 21.. 0910 .50 956 8.5 11.7 __ 21... 0913 3.50 956 8.0 11.8 — 21.., 0915 6.50 958 8.2 11.9 — 21... 0918 9.50 959 8.0 11.8 — 21.., 0950 12.0 962 8.0 11.1 — MAY 25... 1015 .50 1020 16.5 7.0 __ 25... 1018 3.00 1030 16.5 7.0 — 25.. 1050 6.00 1030 16.5 7.0 — 25... 1051 9.00 1030 16.0 6.1 — 25.., 1053 12.0 1010 15.5 2.1 — 25... 1058 13.0 1010 15.5 1.1 — 25.., 1100 1030 16.3 — — JUN 10.. 1000 .50 1010 17.0 9.3 99 10.., 1003 3.00 1010 17.0 9.3 99 10... 1005 6.00 1010 17.0 9.2 98 10... 1008 9.00 1010 17.0 9.2 98 10.., 1010 12.0 1010 17.0 9.1 97 23... 1150 .50 991 21.0 9 '1 — 23... 1153 3.00 992 21.0 9.8 — 23... 1155 6.00 992 20.5 9.8 — 23.. 1158 9.00 1000 20.0 7.9 — 23... 1500 11.0 1000 19.0 1.0 — 23... 1503 12.0 1010 18.0 1.2 — 132 MINNESOTA RIVER BASIN

443636096095400 DILLON-SYLTE IMPOUNDMENT NEAR PORTER, MN

WATER QUALITY DATA, WATER YEAR FEBRUARY TO SEPTEMBER 1982

OXYGEN , SPE­ DIS­ CIFIC SOLVED SAM­ CON­ OXYGEN, (PER­ PLING DUCT­ TEMPER­ DIS­ CENT TIME DEPTH ANCE ATURE SOLVED SATUR­ DATE (FEET) (UMHOS) (DEG C) (MG/L) ATION) (00003) (00095) (00010) (00300) (00301) JUL 07... 1148 .50 956 23.0 7.7 93 07... 1150 3.00 961 23.0 7.7 93 07... 1153 6.00 964 23.0 7.7 93 07... 1156 9.00 965 23.0 7.7 93 07... 1158 12.0 966 23.0 7.2 87 22... 1300 .50 893 28.0 9.8 130 22. . . 1303 3.00 894 27.5 9.5 125 22... 1306 6.00 900 26.5 7.3 94 22. .. 1309 9.00 916 25.5 1.7 22 22. . . 1312 12.0 943 22.0 .5 6 22... 1315 12.7 947 21.5 .5 6 AUG 04... 1105 .50 900 25.5 7.2 92 04... 1108 3.00 903 25.0 6.1 77 04... 1110 6.00 903 25.0 6.0 76 04... 1113 9.00 906 25.0 6.2 73 04... 1115 12.0 907 24.5 4.2 53 19... 0925 .50 900 24.0 11.5 — 19... 0928 3.00 880 24.0 11.5 — 19... 0930 6.00 870 24.0 10.4 — 19... 0933 9.00 900 22.0 .6 — 19... 0935 12.0 900 21.0 .2 -- 31... 1135 .50 860 21.0 8.9 105 31... 1138 3.00 861 20.5 8.9 104 31... 1140 6.00 861 20.5 8.8 103 31... 1143 9.00 861 20.5 8.5 99 31... 1145 12.0 873 20.0 2.4 28 SEP 15... 0955 .50 852 16.0 6.9 73 15... 0958 3.00 851 16.0 6.7 70 15... 1000 6.00 851 16.0 6.7 70 15... 1005 9.00 855 16.0 6.7 70 15... 1008 12.0 855 16.0 6.7 70 29... 0950 .50 870 16.5 7.2 78 29... 0954 3.00 870 lb.4 7.1 77 29... 0956 6.00 870 16.5 7.1 77 29... 0958 9.00 870 16.5 7.1 77 29... 1000 12.0 870 16.5 7.1 77

BED BED BED BED BED BED BED BED MAT. MAT. MAT. MAT. MAT. MAT. MAT. MAT. FALL FALL FALL FALL FALL SIEVE SIEVE SIEVE DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. % FINER % FINER % FINER % FINER % FINER % FINER % FINER % FINER THAN THAN THAN THAN THAN THAN THAN THAN DATE .004 MM .062 MM .125 MM .250 MM .500 MM 1.00 MM 2.00 MM 4.00 MM (80157) (80158) (80159) (80160) (80161) (80168) (801169) (80170) MAR 05... 42 67 71 83 90 94 97 100 JUL 07... 69 99 99 99 100 — — — 133 MINNESOTA RIVER BASIN 443636096095400 DILLON-SYbTE IMPOUNDMENT NEAR PORTER, MM—Continued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1932 DATE FEB 24,82 APR 22,82 APR 24,82 MAY 25,82 TIME 1600 0950 1415 1100 TOTAL CELLS/ML 3100 6100 5700 14000 DIVERSITY: DIVISION 2.0 1.4 0.5 1.1 .CLASS 2.0 1.4 0.5 1.1 ..ORDER 2.5 1.6 0.6 1.8 ...FAMILY 2.5 2.5 0.6 1.8 ....GENUS 2.6 2.7 0.6 1.9

CELLS PER- CELLS PER- CELLS PER- CELLS PER- ORGANISM /ML CENT /ML CENT /ML CENT /ML CENT BACILLARIOPHYTA (DIATOMS) .BACILLARIOPHYCEAE ..ACHNANTHALES ...ACHNANTHACEAE . ...COCCONEIS ..BACILLARIALES ...NITZSCHIACEAE ....NITZSCHIA 28 480 8 * 0 ..EUPODISCALES ...COSCINODISCACEAE ....CYCLOTELLA 120 2 — 100 1 ....MELOSIRA 1900 13 ..PRAGILARIALES ...FRAGILARIACEAE ....ASTERIONELLA 1000# 32 51000 91 8800# 63 ....SYNEDRA 60 1 ..NAVICULALES ...NAVICULACEAE ....NAVICULA CHLOROPHYTA (GREEN ALGAE) .CHLOROPHYCEAE ..CHLOROCOCCALES ...CHLOROCOCCACEAE . ...SCHROEDERIA ...COCCOMYXACEAE ....ELAKATOTHRIX ...HYDRODICTYACEAE ....PEDIASTRQM ...MICRACTINIACEAE . ...GOLENKINIA ...OOCYSTACEAE . ...ANKISTRODESMUS 83 3 ....CHODATELLA . ...CLOSTERIOPSIS ... .NEPHROCYTIUM ....OOCYSTIS ....SELENASTRUM * 0 ...PALMELLACEAE . ...SPHAEROCYSTIS ...SCENEDESMACEAE ....COELASTRUM ....CRUCIGENIA 60 1 . . . .SCENEDESMUS ... .TETRASTRUM . .VOLVOCALES . . .CHLAMYDOMONADACEAE . ...CHLAMYDOMONAS 150 5 540 9 * 0 .. .PHACOTACEAE ....PHACOTUS 60 1 ...VOLVOCACEAE ....PANDORINA ..ZYGNEMATALES . ..DESMIDIACEAE ....STAURASTRUM * 0 CHRYSOPHYTA .CHRYSOPHYCEAE ..CHROMULINALES . ..CHRYSOCOCCACEAE . ...CHRYSOCOCCUS 55 ..OCHROMONADALES ...DINOBRYACEAE ....DINOBRYON 300 5 * 0 ....STENOCALYX 600 10 ...OCHROMONADACEAE . ...OCHROMONAS 320 10 540 9 330 6 140 ...SYNURACEAE .. . .MALLOMONAS 2800# 46 NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 15% * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/2% MINNESOTA RIVER BASIN 443636096095400 DILLON-SYLTE IMPOUNDMENT NEAR PORTER, MN--Continued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1982—Continued

DATE PEB 24,82 APR 22,82 APR 24,82 MAY 25,82 TIME 1600 0950 1415 1100 CELLS PER­ CELLS PER­ CELLS PER­ CELLS PER­ ORGANISM /ML CENT /ML CENT /ML CENT /ML CENT

CRYPTOPHYTA (CRYPTOMONADS) .CRYPTOPHYCSAE ..CRYPTOMONADALES ...CRYPTOGHRYSIDACEAE ....CHROOMONAS 97 3 — - * 0 1800 13 ...CRYPTOMONADACEAS ....GRYPTOMONAS -- - 420 7 * 0 170 1

CYANOPHYTA (BLUE-GREEN ALGAE) .CYANOPHYCEAE ..CHROOCOCCALES ...CHROOCOCCACEAK ....AGMENELLUM — — - — - -- ....ANACYSTIS -- -- — 590 4 ....GOMPHOSPHAERIA 360 11 — -- ..NOSTOCALES ...NOSTOCACEAE ....APHANIZOMENON — - — — ..OSCILLATORIALES ...OSCILLATORIACEAE ....LYNGBYA 970# 31 — — — ....OSCILLATORIA — - — — - —

EUGLENOPHYTA (EUGLEMOIDS) .EUGLENOPHYCEAE ..EUGLENALES ...EUGLENACEAE ....EUGLENA 28 1 — * 0 — ....LEPOCINCLIS — - — - — - — ....PHACUS — — — — ....TRACHELOMONAS 28 1 120 2 — 140 1

PYRRHOPHYTA (FIRE ALGAE) .DINOPHYCEAE ..DINOKONTAE ...CERATIACEAE ....CERATIUM -- — — * 0 . . .PERIDINIACEAE ....PERIDINIUM — — -- -- NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 15% * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/2% MINNESOTA RIVER BASIN 135 443636096095400 DILLON SYLTE IMPOUNDMENT NEAR PORTER, MN—Continued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1932 DATE JUL 7,82 AUG 4,82 AUG 31,82 SEP 29,82 TIME 1150 1110 1230 1420 TOTAL CELLS/ML 54000 11000 7200 7600 DIVERSITY: DIVISION 0.5 1.1 2.5 2.2 .CLASS 0.5 1.1 2.5 2.2 ..ORDER 1.7 2.2 2.9 2.7 ...FAMILY 1.8 2.3 3.3 3.0 . . ..GENUS 2.2 2.9 3.5 3.1 CELLS PER- CELLS PER- CELLS FER­ CELLS PER- ORGANISM /ML CENT .'ML CENT AL CENT /ML CENT BACILLARIOPHYTA (DIATOMS) .BACILLARIOPHYCEAE ..ACHNANTHALES . . .ACHNANTHACEAE . ...GOCCONEIS 72 ..BACILLARIALES ...NITZSCHIACEAE ....NITZSCHIA ..EUPODISCALES . . .COSCINODISCACEAE ....CYCLOTELLA 66 ....MELOSIRA 170 360 130 ..FRAGILARIALES ...FRAGILARIACEAE . . ..ASTERIONELLA . . . .SYNEDRA ..NAVICULALES ...NAVICULACEAE ....NAVICULA CHLOROPHYTA (GREEN ALGAE) .CHLOROPHYCEAE ..CHLOROCOCCALES . . .CHLOROCOCCACEAE ....SCHROEDERIA ...COCCOMYXACEAE ....ELAKATOTHRIX ...HYDRODICTYACEAE ....PEDIASTRUM 1100 15 ...MICRACTINIACEAE ....GOLENKINIA ...OOCYSTACEAE ....ANKISTRODESMUS ....CHODATELLA ....CLOSTERIOPSIS 220 3 44 1 ....NEPHROCYTIUM 140 500 7 ....OOCYSTIS 420 760 220 3 440 6 ....SELENASTRUM 1100 84 ...PALMELLACEAE ....SPHAEROCYSTIS 1100 ...SCENEDESMACEAE ....COELASTRUM 600 ....CRUCIGENIA ....SCENEDESMOS 140 ....TETRASTRUM . .VOLVOCALES ...CHLAMYDOMONADACEAE ....CHLAMYDOMONAS 280 1 84 540 110 1 ...PHACOTACEAE ....PHACOTUS * 0 ...VOLVOCACEAE ....PANDORINA 580 8 ..ZYGNEMATALES ...DESMIDIACEAE ....STAURASTROM CHRYSOPHYTA .CHRYSOPHYCEAE ..CHROMULINALES . ..CHRYSOCOCCACEAE . . ..CHRYSOCOCCUS . .OCHROMONADALES ...DINOBRYACEAE ....DINOBRYON 720 10 ....STENOCALYX ...OCHROMONADACEAE ....OCHROMONAS 520 160 ' 2 ...SYNURACEAE ....MALLOMONAS 470 160 2 NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 15$ * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/2% 136 MINNESOTA RIVER BASIN 443636096095400 DILLON-SYLTE IMPOUNDMENT NEAR PORTER, MN—Continued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1982—Continued DATE JUL 7,82 AUG 4,82 AUG 31,82 SEP 29,82 TIME 1150 1100 1230 1420 CELLS PER- CELLS PER- CELLS PER- CELLS PER- ORGANISM /ML CENT /ML CENT /ML CENT /ML CENT CRYPTOPHYTA (CRYPTOMONADS) .CRYPTOPHYCEAE ..CRYPTOMONADALES . . .CRYPTOCHRYSIDACEAE . ...CHROOMONAS 650 9 — . ..CRYPTOMONADACEAE . . . .CRYPTOMONAS — * 0 1500# 20 CYANOPHYTA (BLUE-GREEN ALGAE) .CYANOPHYCEAE . .CHROOCOCCALES ...CHROOCOCCACEAE ....4GMENELLQM 16000# 29 4000# 35 180 2 ....ANACYSTIS 6500 12 1600 14 1500# 20 ....GOMPHOSPHAERIA ..NOSTOCALES ...MOSTOCACEAE . .. .^PHANIZOMENON 25000# 46 1700# 15 — - — ..OSCILLATORIALES . . .OSCILLATORIACEAE ... .LYNGBYA 740 1 . . . .OSCILLATORIA 1800 3 1600 14 1600# 22 1600# 20 EUGLENOPHYTA (EUGLENOIDS) .EUGLENOPHYCEAE ..EUGLENALES ...EUGLENACEAE . . . .EUGLENA ....LEPOCINCLIS 0 44 1 . .. .PHACUS 0 . ...TRACHELOMONAS 0 180 2 240 3 PYRRHOPHYTA (FIRE ALGAE) .DINOPHYCEAE ..DINOKONTAE ...CERATIACEAE ....CERATIUM 250 3 * 0 .. .PERIDINIACEAE ....PERIDINIUM 420 170 1 830 11 310 4 NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 15% * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/2% MINNESOTA RIVER BASIN ' 1 37

113636096095^01 DILLON-SYLTTE IMPOUNDMENT OUTLET NEAR PORTER, MNF LOCATION.—Lat 14°36'36", long 96°09'5l", in center of sec.9, T.113 N., R.11 W., Lincoln County, Hydrologic Unit 07020001, 0.5 mi (0.8 km) east of County Highway 7, 1.6 mi (2.6 km) south of Porter. DRAINAGE AREA. — 4.8 mi 2 (12.1 km 2 ). WATER-DISCHARGE RECORDS PERIOD OP RECORD.—January 1980 to current year. GAGE.—Water-stage recorder and crest-stage gage. REMARKS.—Water-stage recorder operated only during open-water period. Records good except those for Mar. 1 to May 13, 1980, and Mar. 1-11, 1982, which are poor. EXTREMES FOR PERIOD OP RECORD.--Maximum discharge, 36 ft3 /s (1.02 m3/s) June 5, 1980, gage height, 18.66 ft (5.688 m); no flow on many days each year. EXTREMES FOR CURRENT PERIOD.—January to September 1980: Maximum discharge during period, 36 ft 3/s (1.02 m3/s) June 5, gage height, 18.66 ft (5.688 m); no flow on many days. Water year 1981: Maximum discharge, 1.6 ft 3 /s (0.13 m3/s) Mar. 30, gage height, 18.03 ft (5.196 m); no flow on many days. Water year 1982: Maximum discharge, 18 ft3 /s (0.51 m3 /s) Mar. 30, gage height, 18.50 ft (5.639 m); no flow on many days.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1979 TO SEPTEMBER 1980 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .00 .00 .00 .10 .00 .00 .61 .00 .00 2 .00 .00 .00 .30 .00 .00 .38 .00 .00 3 .00 .00 .00 .20 .00 .00 .29 .00 .00 1 .00 .00 .00 .10 .00 .05 .50 .00 .00 5 .00 .00 .00 .07 .00 23 .72 .00 .00 6 .00 .00 .00 .06 .00 8.2 .57 .00 .00 7 .00 .00 .00 .05 .00 10 .38 .00 .00 8 .00 .00 .00 .01 .00 6.2 .25 .00 .00 9 .00 .00 .00 .20 .00 2.3 .18 .00 .00 10 .00 .00 .00 .20 .00 1.1 .13 .00 .00 11 .00 .00 .00 .20 .00 .61 .10 .00 .00 12 .00 .00 .00 .10 .01 .11 .08 .00 .00 13 .00 .00 .00 .10 .01 .33 .06 .00 .00 11 .00 .00 .00 .07 .01 .29 .01 .00 .00 15 .00 .00 2.5 .05 .03 .18 .01 .00 .00 16 .00 .00 16 .03 .02 .13 .09 .00 .00 17 .00 .00 13 .02 .02 .10 .09 .00 .00 18 .00 .00 11 .01 .01 .10 .09 .00 .00 19 .00 .00 11 .00 .06 .10 .08 .00 .00 20 .00 .00 9.9 .00 .07 .09 .06 .00 .00

21 .00 .00 6.1 .00 .06 .06 .05 .00 .00 22 .00 .00 2.3 .00 .05 .05 .03 .00 .00 23 .00 .00 1.2 .00 .01 .01 .01 .00 .00 21 .00 .00 .70 .00 .02 .25 .00 .00 .00 25 .00 .00 .50 .00 .01 1.1 .00 .00 .00

26 .00 .00 .10 .00 .00 1.0 .00 .00 .00 27 .00 .00 .30 .00 .00 1.0 .00 .00 .00 28 .00 .00 .20 .00 .00 3.0 .00 .00 .00 29 .00 .00 1.0 .00 .00 1.6 .00 .00 .00 30 .00 —— .70 .00 .00 .90 .00 .00 .00 31 .00 — .50 —— .00 —— .00 .00 —— TOTAL .00 .00 80.60 2.20 .51 71.55 1.86 .00 .00 MEAN 000 .000 2.60 .073 .017 2.39 .16 .000 .000 MAX .00 .00 16 .10 .07 23 .72 .00 .00 MIN .00 .00 .00 .00 .00 .00 .00 .00 .00 CFSM 000 .000 .51 .02 .001 .50 .03 .000 .000 IN. .00 .00 .62 .02 .00 .55 .01 .00 .00 AC-FT .00 .00 160 1.1 1.1 112 9.6 .00 .00 138 MINNESOTA RIVER BA3LM

443636096095404 DILLON-SYLTIE IMPOUNDMENT OUTLET NEAR PORTER, MN—Continued

IN ;UBIC PEET PER SSCOMD, 'JAPER YEAR OCTOBER 1980 TO SEPTEMBER 1981 MEAN VALUES

DAY OCT MOV DEC JAM MAR APR MAY JUN JUL AUG SEP

1 .00 .00 .00 .00 .00 .00 3-2 .13 .00 .00 .00 .00 2 .00 .00 .00 .00 .00 .00 2.5 .11 .00 .00 .00 .00 3 .00 .00 .00 .00 .00 .00 2.1 .10 .00 .00 .00 .00 4 .00 .00 .00 .00 .00 .00 2.3 .09 .00 .00 .00 .00 5 .00 .00 .00 .00 .00 .00 2.3 .09 .00 .00 .00 .00 6 .00 .00 .00 .00 .00 .00 1.8 .08 .00 .00 .00 .00 7 .00 .00 .00 .00 .00 .00 1.2 .07 .00 .00 .00 .00 8 .00 .00 .00 .00 .00 .00 1.0 .06 .00 .00 .00 .00 9 .00 .00 .00 .00 .00 .00 .90 .04 .00 .00 .00 .00 10 .00 .00 .00 .00 .00 .00 .64 .03 .00 .00 .00 .00

11 .00 .00 .00 .00 .00 .00 .57 .02 .00 .00 .00 .00 12 .00 .00 .00 .00 .00 .00 .57 .01 .00 .00 .00 .00 13 .00 .00 .00 .00 .00 .00 .72 .00 .00 .00 .00 .00 14 .00 .00 .00 .00 .00 .00 .64 .00 .00 .00 .00 .00 15 .00 .00 .00 .00 .00 .00 .72 .00 .00 .00 .00 .00

16 .00 .00 .00 .00 .00 .00 .50 .00 .00 .00 .00 .00 17 .00 .00 .00 .00 .00 .00 .44 .00 .00 .00 .00 .00 18 .00 .00 .00 .00 .00 .00 .33 .00 .00 .00 .00 .00 19 .00 .00 .00 .00 .00 .00 .33 .00 .00 .00 .00 .00 20 .00 .00 .00 .00 .00 .00 .29 .00 .00 .00 .00 .00

21 .00 .00 .00 .00 .00 .00 .29 .00 .00 .00 .00 .00 22 .00 .00 .00 .00 .00 .00 .33 .00 .00 .00 .00 .00 23 .00 .00 .00 .00 .00 .00 .38 .00 .00 .00 .00 .00 24 .00 .00 .00 .00 .00 .00 .50 .00 .00 .00 .00 .00 25 .00 .00 .00 .00 .00 .00 .44 .00 .00 .00 .00 .00

26 .00 .00 .00 .00 .00 .00 .38 .00 .00 .00 .00 .00 27 .00 .00 .00 .00 .00 .00 .44 .00 .00 .00 .00 .00 28 .00 .00 .00 .00 .00 .00 .33 .00 .00 .00 .00 .00 29 .00 .00 .00 .00 —— .50 .25 .00 .00 .00 .00 .00 30 .00 .00 .00 .00 —— 4.4 .18 .00 .00 .00 .00 .00 31 .00 — .00 .00 — 3-7 —— .00 —— .00 .00 ——

TOTAL .00 .00 .00 .00 .00 8.60 26.57 .83 .00 .00 .00 .00 MEAN .000 .000 .000 .000 .000 .28 .89 .027 .000 .000 .000 .000 MAX .00 .00 .00 .00 .00 4.4 3.2 .13 .00 .00 .00 .00 MIN .00 .00 .00 .00 .00 .00 .18 .00 .00 .00 .00 .00 CPSM .000 .000 .000 .000 .000 .06 .19 .006 .000 .000 .000 .000 IN. .00 .00 .00 .00 .00 .07 .21 .01 .00 .00 .00 .00 AC-PT .00 .00 .00 .00 .00 17 53 1.6 .00 .00 .00 .00

CAL YR 1980 TOTAL 159-75 MEAN .44 MAX 23 MIN .00 CPSM .09 IN 1.24 AC-PT 317 WTR YR 1981 TOTAL 36.00 MEAN .099 MAX 4.4 MIN .00 CPSM .02 IN .28 AC-PT 71 139 MINNESOTA RIVER BASIN 443636096095404 D1LLON-SYLT1E IMPOUNDMENT OUTLET NEAR PORTER, MN—Continued

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 .00 .00 .00 .00 .00 .01 5.8 .38 .93 .00 .00 .00 2 .00 .00 .00 .00 .00 .10 5.0 .33 .68 .00 .00 .00 3 .00 .00 .00 .00 .00 .50 5.1 .28 .46 .00 .00 .00 4 .00 .00 .00 .00 .00 1.6 3.4 .19 .29 .00 .00 .00 5 .00 .00 .00 .00 .00 1.4 2.5 .14 .17 .00 .00 .00 6 .00 .00 .00 .00 .00 1.1 2.0 .11 .24 .00 .00 .00 7 .00 .00 .00 .00 .00 1.1 1.9 .08 .16 .00 .00 .00 8 .00 .00 .00 .00 .00 1.1 1.8 .06 .16 .00 .00 .00 9 .00 .00 .00 .00 .00 1.4 1.6 .05 .18 .08 .00 .00 10 .00 .00 .00 .00 .00 2.0 1.9 .06 .12 .51 .00 .00 11 .00 .00 .00 .00 .00 2.6 2.3 .07 .11 .86 .00 .00 12 .00 .00 .00 .00 .00 2.6 3.9 .40'.12 .10 .66 .00 .00 13 .00 .00 .00 .00 .00 4.8 3.4 .08 .50 .00- .00 14 .00 .00 .00 .00 .00 8.8 2.9 1.0 .09 .45 .00 .00 15 .00 .00 .00 .00 .00 9.2 3.0 1.6 .07 .65 .00 .00 16 .00 .00 .00 .00 .00 6.7 2.9 1.7 .06 .65 .00 .00 17 .00 .00 .00 .00 .00 4.8 3-3 1.1 .05 .61 .00 .00 18 .00 .00 .00 .00 .00 4.0 2.1 .89 .04 .51 .00 .00 19 .00 .00 .00 .00 .00 3.4 1.7 .72 .04 .39 .00 .00 20 .00 .00 .00 .00 .00 2.5 1.9 .50 .03 .30 .00 .00 21 .00 .00 .00 .00 .00 1.8 2.5 .33 .02 .39 .00 .00 22 .00 .00 .00 .00 .00 1.6 2.4 .27 .02 .30 .00 .00 23 .00 .00 .00 .00 .00 1.8 1.6 .27 .01 .22 .00 .00 24 .00 .00 .00 .00 .00 2.5 1.2 .23 .01 .14 .00 .00 25 .00 .00 .00 .00 .00 3.4 .80 .21 .01 .11 .00 .00 26 .00 .00 .00 .00 .00 3.4 .67 .29 .00 .17 .00 .00 27 .00 .00 .00 .00 .00 3.0 .59 .40 .00 .11 .00 .00 28 .00 .00 .00 .00 .00 3.2 .52 .55 .00 .05 .00 .00 29 .00 .00 .00 .00 —— 11 .43 .50 .00 .01 .00 .00 30 .00 .00 .00 .00 —— 16 .38 .51 .00 .01 .00 .00 31 .00 — .00 .00 — 7.6 —— .72 —— .00 .00 —— TOTAL .00 .00 .00 .00 .00 115.01 69-49 14.06 4.13 7.68 .00 .00 MEAN .000 .000 .000 .000 .000 3.71 2.32 .45 .14 .25 .000 .000 MAX .00 .00 .00 .00 .00 16 5.8 1.7 .93 .86 .00 .00 MIN .00 .00 .00 .00 .00 .01 .38 .05 .00 .00 .00 .00 CPSM .000 .000 .000 .000 .000 .77 .48 .09 .03 .05 .000 .000 IN. .00 .00 .00 .00 .00 .89 .54 .11 .03 .06 .00 .00 AC-FT .00 .00 .00 .00 .00 228 138 28 8.2 15 .00 .00 CAL YR 1981 TOTAL 36.00 MEAN .099 MAX 4.4 MIN .00 CFSM .02 IN .28 AC- 71 WTR YR 1982 TOTAL 210.37 MEAN .58 MAX 16 MIN .00 CPSM .12 IN 1.63 AC- 417 140

443636096095404 DILLON-SYLTE IMPOUNDMENT OUTLET NEAR PORTER, MN—Continued PERIOD OP RECORD.—Water years 1980 to current year. REMARKS.—Letter K indicates non-ideal colony count. Letter E indicates estimated value.

WATER QUALITY DATA, WATER YEAR MARCH TO SEPTEMBER 1932

SPE­ BARO­ OXYGEN, COLI- SPE- CIFIC METRIC DIS­ PORM, STREAM- CIPIC CON­ PH PRES­ SOLVED FECAL, PLOW, CON­ DUCT­ PH LAB SURE OXYGEN, (PER­ 0.7 INSTAN­ DUCT­ ANCE (STAND­ (STAND­ (MM TEMPER­ DIS­ CENT UM-MF TIME TANEOUS ANCE LAB ARD ARD OP ATURE SOLVED SATUR­ (COLS./ DATE (CPS) (UMHOS) (UMHOS) UNITS) UNITS) HG) (DEG C) (MG/L) ATION) 100 ML) (00061) (00095) (90095) (00400) (00403) (00025) (00010) (00300) (00301) (31625) MAR 05... 1030 2.7 825 840 __ 7.7 E725 .5 7.5 _- __ 17... 1100 4.7 666 — 7.6 E733 1.0 12.0 — __ 25... 1530 7.3 1010 — — — E725 2.0 11.1 — — 31... 1230 9-0 686 728 — 7.9 731 3-0 — — 13 APR 01... 1130 6.0 738 — — — 733 3.5 11.1 87 — 02... 1300 4.6 680 — — — 708 4.5 10.2 85 — 14. .. 1300 3.0 938 906 — 8.1 — 6.5 — — — MAY 25... 1030 .20 1030 1030 — 8.2 E730 16.5 8.1 — K15 JUN 10... 1015 .10 — — — — — — — — — STREP­ HARD­ ALKA­ TOCOCCI NESS MAGNE­ SODIUM POTAS­ BICAR­ LINITY, ALKA­ FECAL, HARD­ NON CAR­ CALCIUM SIUM, SODIUM, AD­ SIUM, BONATE CARBON­ LINITY KF AGAR NESS BONATE DIS­ DIS­ DIS­ SORP­ DIS­ IT-PLD ATE LAB (COLS. (MG/L (MG/L SOLVED SOLVED SOLVED TION SOLVED (MG/L IT-PLD (MG/L PER AS AS (MG/L (MG/L (MG/L RATIO (MG/L AS (MG/L - AS DATE 100 ML) CAC03) CAC03) AS CA) AS MG) AS NA) AS K) HC03) CAC03) CAC03) (31673) (00900) (95902) (00915) (00925) (00930) (0093D (00935) (99440) (99430) (90410) MAR 05... — 420 220 104 39 12 .3 9.8 246 202 200 17... — — — — — — — — 208 170 — 25... — — — — — _- — — — — — 31... 1100 367 200 86 37 14 .3 4.2 — — 170 APR 01. .. — — — ______02... — — — ______— 14... — 472 250 110 48 15 .3 4.5 — — 220 MAY 25... 120 518 290 120 53 21 .4 4.9 — — 232 JUN 10... — — — — — — — — — — —

SOLIDS, SOLIDS, NITRO­ NITRO­ SEDI­ CHLO­ FLUO- SILICA, RESIDUE SUM OF GEN, GEN, AM­ MENT, SULPATE RIDE, RIDE, DIS­ AT 180 CONSTI­ N02+N03 MONIA + PHOS­ SEDI­ DIS­ DIS­ DIS­ DIS­ SOLVED DEO. C TUENTS, DIS­ ORGANIC PHORUS, MENT, CHARGE, SOLVED SOLVED SOLVED (MG/L DIS­ DIS­ SOLVED TOTAL TOTAL SUS­ SUS­ (MG/L (MG/L (MG/L AS SOLVED SOLVED (MG/L (MG/L (MG/L PENDED PENDED DATE AS S04) AS CL) AS P) SI02) (MG/L) (MG/L) AS N) AS N) AS P) (MG/L) (T/DAY) (00945) (00940) (00950) (00955) (70300) (70301) (0063D (00625) (00665) (80154) (80155) MAR 05... 270 7-1 .2 17 619 580 2.8 1.40 .270 — — 17... — — — — — — — — — 0 .00 25... — — — — — — — — — 12 .24 31... 200 4.5 .2 13 526 461 1.5 <.10 .080 10 .24 APR 01. .. — — — — — — — — — 9 .15 02... — — — — — — — — — 12 .15 14... 310 5.2 .3 12 707 637 .78 .49 .060 50 .41 MAY 25... 360 7.3 .4 6.7 835 712 <.10 1.20 .04'0 64 .03 JUN 10. .. — — — — — — — — — 66 .02 SED. SUSP. SIEVE DIAM. % FINER THAN DATE .062 MM (7033D MAR 31... 100 MINNESOTA RIVER BASIN 111 05313500 YELLOW MEDICINE RIVER NEAR GRANITE PALLS, MN LOCATION.—Lat 44°43'l8", long 95°31'07", in SW4 sec.35, T.115 N., R.39 W., Yellow Medicine County, Hydrologic Unit 07020004, on right bank 50 ft (15 m) downstream from highway bridge, 6 mi (9.7 km) upstream from mouth, and 8 mi (13 km) south of town of Granite Palls. DRAINAGE AREA.—653 mi 2 (1,691 km 2 ). PERIOD OP RECORD.—March 1931 to September 1935 (no winter records), October 1935 to September 1938, October 1939 to current year. Monthly discharge only for some periods, published in WSP 1308. REVISED RECORDS.—WSP 1508: 1931, 1934(M), 1937(1-1), 1946(M), 1950(M). GAGE.--Water-stage recorder. Datum of gage is 960.64 ft (292.803 ra) National Geodetic Vertical Datum of 1929. Mar. 16, 1931, to June 13, 1938, nonrecording gage, on bridge 50 ft (15 m) upstream at present datum. Oct. 12, 1939, to Nov. 30, 1952, nonrecording gage 500 ft (152 m) downstream at present datum. REMARKS.—Records good except those for winter period, which are fair. Natural discharge affected by unknown amount of interbasin flow between Yellow Medicine, Redwood, and Cottonwood River basins during extreme floods. AVERAGE DISCHARGE.--46 years (water years 1936-38, 1940-82), 103 ft 3 /s (2.917 m 3 /s), 2.14 in/yr (54 mm/yr), 74,620 acre-ft/yr (92.0 hm3/yr); median of yearly mean discharges, 77 ft^/s (2.18 nP/s), 1.60 in/yr (41 mm/yr), 55,800 acre-ft/yr (69 hrrP/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 17,200 ftVs (487 m3/s) Apr. 10, 1969, gage height, 14.90 ft (4.542 m); no flow at times in 1931, 1933, 1948, 1959. EXTREMES OUTSIDE PERIOD OP RECORD.—Flood in June 1919 reached a stage of 17-5 (5.3 m), from information by local residents, discharge, 25,200 ft^/s (714 m3/s). EXTREMES FOR CURRENT YEAR.—Peak discharge above base of 300 ftVs (8.50 -n 3 /s) and maximum (*):

;e Gage height Discharge flage height Date Time m3/s ) (ft) (m) Date Time (ft3/3 ) (m (ft) (m) Apr. 2 2100 *993 21.8 *4.77 1.454 July 15 1830 520 14.7 3.96 1.207 July 9 1845 400 11.3 3.71 1.131 July 21 1430 646 18.3 4.19 1.277 Minimum discharge, 1.7 ft3/ s (0.048 m^/s) Oct. 1, gage height, 2.12 ft (0.646 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 1.8 2.7 6.8 4.6 4.1 4.1 838 103 65 15 63 9.3 2 2.1 2.6 5.6 4.6 4.1 4.1 960 94 65 14 54 8.8 3 2.6 2.7 5.6 4.6 4.1 4.1 778 87 67 14 47 7.8 4 3.1 2.6 5.6 4.6 4.1 4.1 595 79 65 16 41 6.8 5 3.1 2.6 5.2 4.5 4.1 4.1 535 75 62 18 36 6.8 6 3.1 2.6 5.6 4.5 4.1 4.1 452 69 60 24 32 6.4 7 2.9 2.8 5.6 4.5 4.1 4.1 400 63 59 210 28 6.0 8 2.6 2.6 5.2 4.5 4.1 4.1 348 59 59 157 25 6.4 9 2.5 2.6 5.2 4.5 4.1 4.1 310 56 58 288 21 6.4 10 2.5 2.6 5.0 4.4 4.1 4.3 289 57 52 309 19 6.0 11 2.3 2.6 5.0 4.4 4.1 5.6 277 57 50 223 16 5.6 12 2.3 2.6 5.0 4.4 4.1 8.2 281 61 57 187 15 9.9 13 3.1 2.6 5.0 4.4 4.1 12 302 69 54 149 13 11 14 3.3 2.6 5.0 4.4 4.1 22 328 78 52 177 12 9.9 15 3.2 2.8 5.0 4.3 4.1 14 343 103 50 372 11 9.9 16 3.1 3.0 5.0 4.3 4.1 40 319 118 45 407 10 9.3 17 3.3 3-0 5.0 4.3 4.1 60 290 131 42 286 9.9 9.3 18 3.5 3-3 5.0 4.1 60 278 139 39 223 9.3 8.8 19 3-3 3.7 5.0 4 '.3 4.1 230 269 134 37 189 8.3 8.3 20 3-3 3-5 5.0 4.3 4.1 190 251 129 34 169 7.8 7.8 21 3.0 3-8 5.2 4.3 4.1 170 232 119 33 494 7.8 6.8 22 3.0 4.7 5.2 4.2 4.1 170 218 108 31 471 7.3 7.8 23 3.0 4.5 5.2 4.2 4.1 170 212 97 28 318 6.8 8.3 24 3.2 4.5 5.1 4.2 4.1 180 208 88 27 228 8.8 7.8 25 3.2 5.3 5.1 4.2 4.1 205 190 80 27 180 9.3 7.8 26 3.2 6.2 5-0 4.2 4.1 210 168 80 ?4 153 8.8 7.8 27 3.0 5.2 4.9 4.2 4.1 200 151 76 23 134 8.3 7.3 28 3.0 5-0 4.8 4.2 4.1 225 135 74 21 115) 7.8 7.3 29 2.8 5.0 4.8 4.1 —— 251 121 72 19 102 9.3 8.3 30 2.8 5.2 4.7 4.1 —— 315 111 72 17 87 11 6.8 31 2.8 —— 4.6 4.1 —— 500 —— 69 —— 75 11 —— TOTAL 90.0 105.5 160.0 134.7 114.8 3279.0 10189 2696 1322 5«04 574.5 236.5 MEAN 2.90 3.52 5.16 4.35 4.10 106 340 87.0 44.1 187 18.5 7.88 MAX 3.5 6.2 6.8 4.6 4.1 500 960 139 67 494 63 11 MIN 1.8 2.6 4.6 4.1 4.1 4.1 111 56 17 14 6.8 5.6 CPSM .004 .005 .008 .007 .006 .16 .52 .13 .07 .29 .03 .01 IN. .01 .01 .01 .01 .01 .19 .58 .15 .08 .33 .03 .01 CAL YR 1981 TOTAL 4432 . 4 MEAN 12.1 MAX 168 MIN 1.7 CPSM .02 IN .25 WTR YR 1982 TOTAL 24706 .0 MEAN 67.7 MAX 960 MIN 1.8 CFSM .10 IN 1.41 142 MINNESOTA RIVKR SASIM

05315000 REDWOOD RIVER NEAR MARSHALL, MM

LOCATION. — Lat 44°25'49", lone; 95°50'43", in SE^SWi sec. 12, T.11.1 N., R.42 W., Lyon County, Hydrologic Unit 07020006, on right bank 2.0 mi (3-2 km) uostream from Redwood River diversion structure on southwest edge of town of Marshall, MN. Prior to Apr. 10, 1980, at site 5 mi (R.O km) downstream.

DRAINAGE AREA. — 303 mi 2 (785 km 2 ).

PERIOD OP RECORD. — March 1940 to current year. Monthly discharge onlv for so-ne periods, oublished in WSP 1308.

GAGE. --Water-stage recorder. Datum of gage is 1,188.23 ft (362.172 m) National Geodetic Vertical Datum of 1929. Nonrecording gage and crest-stage gage 5 mi (8.0 km) downstream from present site. Datum of gage is 1,144.88 ft (348.959 m) National Geodetic Vertical Datum of 1929. Nonrecording gage and crest-stage gage on diversion channel. Datum of gage is 1,100.00 ft (335.280 n) National Geodetic Vertical Datum of 1929.

REMARKS .--Records good except those for winter period, which are fair. Water diverted at medium and high stages into diversion channel 2.0 mi (3-2 km) belo/r station. Diversion began Mar. 18, 1964. Unknown amount of natural diversion into Cottonwood River hasin occurs at extremely high stages 0.8 mi (1.3 km) below station.

AVERAGE DISCHARGE. — 42 years, 45.3 ftVs (1.283 m 3 /s), 2.03 in/vr (52 nm/yr) 32,820 acre-ft (40.5 hmVyr); median of yearly mean discharges, 37 ft^/s (1.05 m^/s), 1.66 in/yr (42 mm/yr), 26,800 acre-ft/yr (33 h

EXTREMES FOR PERIOD OF RECORD. — River only, maximum discharge, 5,370 ft 3 /s (152 m 3 /s) June 17, 1957, gage height, 10.14 ft (3.091 m); maximum gage height, 11.05 ft (3-368 m) Apr. 6, 1951, from floodmark; no flow at times.

Diversion only, maximum discharge, 4,440 ft 3 /s (126 m :Vs) Apr. 10, 1969, gage height, 78.45 ft (23-912 m); no flow on many days.

Combined flow, maximum discharge, 5,590 ftVs (158 m-Vs) Apr. 10, 1969; no flow at times.

EXTREMES FOR CURRENT YEAR. — Maximum discharge, 301 ft 3 /s (8.52 mVs) Feb. 23, gage height, 10.93 ft (3.331 m) (backwater from ice); minimum discharge, 2.1 ft-Vs (0.059 m^/s) Oct. 1, 2; minimum gage height, 5.74 ft (1.750 m) Aug. 23.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY -TUN JUL A no SEP

1 2.1 5.3 6.9 4.6 3.9 140 179 47 65 24 20 61 2 2.3 4.3 6.9 4.5 3-9 125 1H4 43 63 23 17 68 3 3-0 4.0 6.9 4.5 3.9 85 162 40 61 21 16 45 4 4.5 4.2 6.9 4.4 3-9 75 102 36 56 20 16 35 5 4.0 4.8 6.9 4.4 3-9 55 103 35 51 19 14 30 6 4.5 3.7 7.3 4.3 3.9 40 90 32 51 18 13 26 7 4.0 3.7 7.3 4.3 3.9 30 107 30 54 42 12 24 8 4.2 3.7 7.3 4.2 3.9 22 83 28 54 55 12 22 9 4.8 3.2 7.3 4.2 3.9 20 83 27 62 70 11 20 10 4.8 3.2 7-3 4.2 3.9 28 76 26 70 62 10 21 11 5-1 3-0 7.2 4.1 3.9 45 76 26 67 57 9.2 22 12 5-4 3-0 7.2 4.1 3-9 90 112 30 61 54 8.5 47 13 9.4 3.2 7.1 4.1 3-9 95 142 29 55 52 7-9 63 14 13 3.5 6.9 4.0 3.9 95 134 34 54 50 7.3 48 15 10 3.5 6.7 4.0 3-9 95 131 39 71 78 7.6 48 16 11 3.7 6.5 4.0 3.9 90 154 49 68 110 6.9 46 17 11 4.0 6.4 4.0 3-9 85 213 54 62 95 6.4 43 18 13 4.5 6.2 3.9 5.0 80 206 54 58 90 5.6 39 19 10 5.6 6.0 3.9 12 73 158 46 51 87 5.3 37 20 8.9 5.6 5.9 3-9 20 60 143 40 45 84 4.0 34 21 8.7 5.6 5.8 3-9 40 50 140 36 41 75 3.9 32 22 8.1 5.4 5.7 3-9 140 55 132 34 39 67 3.0 32 23 6.7 6.0 5.6 3.9 270 70 119 32 36 58 2.6 31 24 6.8 6.6 5.4 3-9 185 100 105 31 34 51 8.6 29 25 6.6 6.6 5.3 3.9 165 130 91 29 32 44 8.6 28 26 6.6 6.9 5.2 3-9 125 135 78 29 30 40 7.6 28 27 6.0 7.3 5.0 3-9 115 100 69 32 28 35 5.3 27 28 5.8 6.9 4.9 3.9 90 110 61 32 26 31 3.9 25 29 5.7 6.9 4.8 3.9 175 56 32 26 28 5.7 24 30 5.7 6.9 4.7 3.9 ___ 210 51 31 27 25 6.5 24 31 5.4 — -- 4.7 3.9 —— 227 —— 50 ___ 22 7.0 ___ TOTAL 207.1 144.8 194.2 126.5 1233.3 2790 3500 1113 1498 1587 272.4 1059 MEAN 6.68 4.83 6.26 4.08 44.0 90.0 117 35-9 49-9 51-2 8.79 35.3 MAX 13 7.3 7-3 4.6 270 227 213 54 71 110 20 68 MIN 2.1 3.0 4.7 3.9 3.9 20 51 26 26 18 2.6 20 CFSM .02 .02 .02 .01 .15 -30 -39 .12 .17 .17 .03 .12 IN. .03 .02 .02 .02 .15 .34 .43 .14 .18 .19 .03 .13 GAL YR 1981 TOTAL 1952 .84 MEAN 5.35 MAX 42 MIN .42 CFSM .02 IN . 24 WTR YR 1982 TOTAL 13725 .30 MEAN 37.6 MAX 270 MIN 2.1 CFSM .12 IN 1. 69 MINNESOTA RIVER BASIN 143 05316500 REDWOOD RIVER NEAR REDWOOD PALLS, MN LOCATION.—Lat 44°31'25", long 95°10'20", in SEJNE4 sec.9, T.112 N., R.36 W., Redwood County, Hydrologic Unit 07020006, on right bank 4 ft (1.2 m) upstream from highway bridge, 3 mi (4.8 km) west of town of Redwood Palls, and 8.5 mi (13-7 km) upstream from mouth. DRAINAGE AREA. —697 mi 2 (1,805 km 2 ). PERIOD OP RECORD.—July 1909 to September 1914 (no winter records except 1911-12). August 1930 to September 1935 (no winter records), October 1935 to current year. GAGE.—Water-stage recorder. Datum of gage is 972.33 ft (296.366 m) National Geodetic Vertical Datum of 1929. July 1909 to September 1914, nonrecord'ing gage at bridge 20 ft (6 m) downstream at datum 0.22 ft (0.067 m) lower. August 1930 to Oct. 25, 1949, nonrecording gage, at bridge 20 ft (6 m) downstream at present datum. REMARKS.--Records good except those for winter periods, which are fair. Natural discharge affected by unknown amount of interbasin flow between Yellow Medicine, Redwood, and Cottonwood River basins during extreme floods. AVERAGE DISCHARGE. —48 years (water years 1912, 1936-82), 104 ft3/ s £2.945 mVs), 2.03 in/yr (52 mm/yr), 75,350 acre-ft/yr (92.9 bm3/yr); median of yearly mean discharges, 74 ft3/s (2.10 nH/s), 1.44 in/yr (37 mm/yr) 53,600 acre-ft/yr (66 hnp/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 19,700 ft 3/s (558 m3/s) June 18, 1957, gage height, 15-92 ft (4.852 m), from floodmark; no flow for several days in January 1940 and for part of each day Aug. 19, 20, 1959- EXTREMES FOR CURRENT YEAR.—Peak discharges above base of 400 ft 3/s (11.3 m 3/s') and maximum (*): Discharge Gage height Discharge Gage height Date Time (ft3 /s) (m3/s) (ft) (m) Date Time (ftVs) (m3 /s) (ft) (m) Apr. 3 0915 1370 38.8 a4.71 1.436 July 16 1400 *1550 43.9 *5.25 1.600 Apr. 17 0745 520 14.7 3.38 1.030 July 21 1845 1060 30.0 4.46 1.359 a Backwater from ice. Minimum daily discharge, 5.8 ft3/s (0.16 mVs) Jan. 25 to Feb. 19; minimum gage height, 1.44 ft (0.439 m) Oct. 2, 3.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 9.2 53 34 29 5.8 35 755 138 261 59 113 50 2 8.7 55 32 27 5.8 25 765 126 241 59 101 48 3 12 53 36 25 5.8 12 1290 117 215 62 90 77 4 24 50 36 24 5.8 8.2 1160 110 193 55 . 82 81 5 28 49 36 22 5.8 10 890 104 171 49 75 68 6 39 47 36 20 5.8 18 665 98 168 46 69 60 7 41 46 36 18 5.8 30 495 93 241 68 63 55 8 39 44 35 16 5.8 25 412 87 205 129 55 49 9 36 44 36 14 5.8 22 360 83 185 123 49 44 10 33 41 36 13 5.8 26 342 82 178 217 45 69 11 30 40 36 12 5.8 50 350 82 168 185 42 56 12 29 39 38 12 5.8 65 400 83 289 141 38 81 13 33 40 38 11 5.8 90 416 160 209 110 36 160 14 73 40 35 11 5.8 235 440 251 182 129 35 143 15 119 40 34 10 5.8 375 468 284 285 435 34 129 16 114 39 34 9.8 5.8 450 480 293 269 1470 31 123 17 104 38 34 9.4 5.8 485 514 271 229 1310 30 116 18 104 36 34 8.8 5.8 485 498 331 189 956 27 104 19 112 39 34 8.2 5.8 490 492 344 160 682 25 94 20 107 30 34 7.4 6.2 460 492 291 141 495 23 86 21 96 32 34 6.6 7.7 385 476 245 120 812 20 79 22 84 35 34 6.2 12 365 427 211 108 793 19 75 23 78 38 34 6.0 50 445 385 181 100 490 18 71 24 74 39 34 5.9 45 590 343 160 95 358 24 70 25 73 52 34 5.8 13 650 304 147 89 285 50 71 26 71 54 34 5.8 7.2 640 263 144 84 237 56 63 27 66 39 • 34 5.8 6.7 640 224 139 80 197 40 59 28 62 34 33 5.8 12 580 193 136 75 174 28 57 29 60 39 32 5.8 —— 642 169 136 70 154 34 57 30 59 39 32 5.8 —— 710 153 141 63 149 42 55 31 56 —— 31 5.8 —— 795 —— 213 —— 129 52 —— TOTAL 1873.9 1264 1070 372.9 270.0 9838.2 14621 5281 5063 10558 1446 2350 MEAN 60.4 42.1 34.5 12.0 9.64 317 487 170 169 341 46.6 78.3 MAX 119 55 38 29 50 795 1290 344 289 1470 113 160 MIN 8.7 30 31 5-8 5.8 8.2 153 82 63 46 18 44 CPSM .09 .06 .05 .02 .01 .46 .70 .24 .24 .49 .07 .11 IN. .10 .07 .06 .02 .01 .53 .78 .28 .27 .56 .08 .13 AC-FT 3720 2510 2120 740 536 19510 29000 10470 10040 20940 2870 4660 CAL YR 1981 TOTAL 12184.0 MEAN 33.4 MAX 265 MIN 2.9 CPSM .05 IN .65 AC-FT 24170 WTR YR 1982 TOTAL 54008.0 MEAN 148 MAX 1470 MIN 5.8 CFSM .21 IN 2.88 AC-FT 107100 MINNESOTA RIVER BASIN 05316900 DRY CREEK NEAR JEPPERS, MN LOCATION.—Lat 44°07'21", long 94°12'13", in NE^NEi sec.31, T.108 N., R36 W., Cottonwood County, on right bank 17 ft upstream from culvert on County Road 10, 4.5 mi (7.2 km) north of Jeffers. DRAINAGE AREA.—3.13 mi 2 (8.11 km 2 ). PERIOD OP RECORD.—Annual maximum discharge, water years 1961-1981. June 1982 to September 1982. GAGE.—Water stage recorder and crest-stage gage. Aug. 9, I960, to Oct. 4, 1979, recording gage at present site and datum. Aug. 30, I960, to present, crest-stage gage at same site and datum. REMARKS.—Records fair. EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 508 ft3/s (14.4 m3/s) July 19, 1963, gage height, 9.96 ft (3-036 m); maximum gage height, 10.64 ft (3.243 m) Apr. 6, 1965 (back water from ice); no flow for several periods. EXTREMES FOR CURRENT YEAR.—Water year 1982: Maximum discharge, 142 ft 3 /s (4.02 m 3 /s) May 17, gage height, 6.32 ft (1.926 m); maximum gage height, 8.94 ft (2.725 m) Apr. 3 (backwater from ice); minimum discharge (June to September), 0.04 ft 3/s (0.001 m3/s) Aug. 21, 22, 23, 24, gage height, 3.72 ft (1.134 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEE MAR APR MAY JUN JUL AUG SEP 1 —— .21 .14 .20 2 —— .22 .12 .12 3 —— .22 .11 .09 4 —— .15 .26 .08 5 —— .13 .15 .11 6 —— .22 .13 .12 7 —— .20 .13 .11 8 —— .16 .11 .11 9 —— .22 .10 .10 10 —— .33 .10 .50 11 —— .38 .09 .18 12 —— .24 .09 1.0 13 —— .19 .10 1.0 14 —— .19 .11 .38 15 —— .60 .12 .38 16 —— .38 .11 .32 17 —— .26 .09 .24 18 —— .24 .08 .23 19 —— .19 .08 .21 20 —— .16 .06 .20 21 —— 2.0 .06 .19 22 .53 .89 .05 .17 23 .46 .58 .05 .17 24 .42 .45 .55 .16 25 .48 .36 .14 .16 26 .47 .34 .10 .16 27 .45 .33 .10 .15 28 .33 .24 .09 .13 29 .29 .22 .20 .49 30 .27 .17 .20 .22 31 —— .15 .16 TOTAL —— 10.62 3.98 7.68 MEAN —— .34 .13 .26 MAX —— 2.0 .55 1.0 MIN —— .13 .05 .08 CFSM —— .11 .04 .08 IN. —— .13 .05 .09 AG-FT —— 21 7.9 15 MINNESOTA RIVER BASIN 145 05317000 COTTONWOOD RIVER NEAR NEW ULM, MN LOCATION.—Lat 44°17'29", long 94°26'24", in SW4NEJ sec.33, T.110 N., R.30 W., Brown County, Hydrologic Unit 07020008, on left bank 600 ft (183 m) upstream from highway bridge, 1.8 mi (2.9 km) south of New Ulm, and 3.2 mi (5.1 km) upstream from mouth. DRAINAGE AREA.—1,280 mi 2 (3,320 km2 ), approximately.

PERIOD OP RECORD.—July 1909 to December 1913, March 1931 to March 1938, August 1938 to current year (winter records incomplete prior to 1936). REVISED RECORDS.—WSP 355: 1912. GAGE.—Water-stage recorder. Datum of gage is 796.83 ft (242.874 m) National Geodetic Vertical Datum of 1929. July 1, 1909, to Dec. 13, 1913, nonrecording gage at site 2.7 mi (4.3 km) upstream at different datum. Mar. 15, 1931, to Mar. 31, 1938, nonrecording gage 2.2 mi (3.5 km) upstream at datum 11.41 ft (3.477 m) higher. Aug. 23, 1938, to June 25, 1948, nonrecording gage at present site and datum. REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.—48 years (water years 1912-13, 1936-37, 1939-82), 271 ft 3 /s (7.675 m3 /s), 2,88 in/yr (73 mm/yr), 196,300 acre-ft/yr (242 hm^/yr); median of yearly mean discharges, 222 ftVs (6.29 nH/s), 2.36 in/yr (60 mm/yr), 161,000 acre-ft/yr (199 hm3 /yr). EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 28,700 ft3/s (813 m3/s) Apr. 10, 1969, gage height, 19.15 ft (5.837 m); maximum gage height, 20.86 ft (6.358 m) Apr. 8, 1965, from floodmark (backwater from ice); minimum discharge observed, 0.5 ft3/s (0.014 m^/s) Nov. 27, 1952; minimum gage height, 0.72 ft (0.219 m) Nov. 20, 1964. EXTREMES FOR CURRENT YEAR.—Peak discharge above base of 1,300 ftVs (36.8 m3 /s) and maximum (*):

..Discharge., Gage height Discharge Gage height Date Time (ftVs) (mVs) (ft)' (m) Date Time (ft3 /s) (m3 /s) (ft) (m) Mar. 18 1400 1740 49 .3 7 .13 2.173 Apr. 17 2315 1360 38.5 6.22 1.896 Mar. 21 1115 ice jam *9 .65 2.941 May 19 1830 1630 46.2 6.87 2.094 Apr. 3 2400 *1990 56 .4 7 .67 2.338 June 1 0530 1580 44.7 6.75 2.057 Minimum discharge, 10 ft 3 /s (0.28 m3 /s) Oct. 3, gage height, 1.08 ft (0.329 m). DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 14 84 56 29 25 60 1380 376 1520 207 201 87 2 11 80 54 29 25 125 1340 344 1430 194 177 80 3 22 77 51 28 25 150 1610 321 1280 184 160 87 4 31 72 50 28 25 170 1810 308 1020 174 148 91 5 45 70 50 27 25 190 1590 300 827 164 138 124 6 42 67 50 27 25 210 1400 297 720 174 128 114 7 40 65 49 27 25 230 1190 284 669 156 119 107 8 35 63 48 26 25 240 1050 272 673 156 111 114 9 36 58 47 26 25 260 901 264 661 193 103 108 10 38 56 46 26 25 270 795 259 610 186 99 122 11 35 54 45 26 25 319 744 253 554 202 94 120 12 33 54 44 26 25 383 828 253 513 220 89 139 13 34 53 43 26 25 459 1020 260 556 218 85 129 14 109 54 42 26 26 706 1120 280 529 207 82 149 15 105 53 41 26 26 900 1150 351 483 202 76 191 16 106 52 40 25 26 1150 1120 482 485 205 73 222 17 106 52 39 25 26 1480 1250 551 523 262 71 220 18 112 51 38 25 26 1710 1280 874 558 444 67 216 19 110 50 37 25 27 1640 1110 1550 521 558 64 208 20 117 48 36 25 27 1520 976 1470 472 534 59 191 21 122 47 35 25 28 1410 890 1220 437 507 54 173 22 117 47 34 25 30 1410 832 1000 404 719 52 158 23 112 49 34 25 32 1430 773 832 370 1040 47 147 24 119 50 33 25 34 1540 713 716 339 111 72 136 25 115 53 32 25 37 1520 646 637 313 587 69 127 26 110 56 32 25 40 1470 584 609 291 466 81 119 27 105 60 31 25 44 1420 525 594 273 391 104 112 28 103 62 30 25 50 1400 476 580 257 337 84 107 29 96 62 30 25 —— 1370 439 549 242 295 86 110 30 92 60 30 25 —— 1370 403 563 223 257 85 105 31 87 — - 30 25 —— 1400 — -- 1100 —— 225 82 —— TOTAL 2359 1759 1257 803 804 27912 29945 17749 17753 10441 2960 4113 MEAN 76.1 58.6 40.5 25.9 28.7 900 998 573 592 337 95.5 137 MAX 122 84 56 29 50 1710 1810 1550 1520 1040 201 222 MIN 11 47 30 25 25 60 403 253 223 156 47 80 CPSM .06 .05 .03 .02 .02 .70 .78 .45 .46 .26 .08 .11 IN. .07 .05 .04 .02 .02 .81 .87 .52 .52 .30 .09 .12 AC-PT 4680 3490 2490 1590 1590 55360 59400 35210 35210 20710 5870 8160 GAL YR 1981 TOTAL 22652 MEAN 62.1 MAX 688 MIN 10 CPSM .05 IN .66 AC-PT 44930 WTR YR 1982 TOTAL 117855 MEAN 323 MAX 1810 MIN 11 CPSM .25 IN 3.43 AC-PT 233800 146 MINNESOTA RIVER BASIN 05317200 LITTLE COTTONWOOD RIVER NEAR COURTLAND, MN LOCATION.—Lat 44°l4'47", long 94°20'19", in SWJNEJ sec.17, T.109 N., R.29 W., Blue Earth County, Hydrologic Unit 07020007, on right bank 30 ft (9-1 m) downstream from bridge on State Highway 68, 0.7 mi (1.1 km) above mouth, 1.5 mi (2.4 km) south of Courtland. DRAINAGE AREA.—230 mi 2 (596 km 2 ), approximately. PERIOD OP RECORD.—October 1973 to current year. September 1969 to September 1973, operated as a low-flow station only. GAGE.—Water-stage recorder. Datum of gage Is 788.25 ft (240.259 m) National Geodetic Vertical Datum of 1929. REMARKS.--Records good except those for winter period and those affected by beaver activity, which are fair. AVERAGE DISCHARGE.—9 years, 38.2 ft 3/s (1.082 m 3/s), 2.26 In/yr (57 mm/yr), 27,680 acre-ft/yr (34.1 hmVyr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 933 ft3/s (26.4 m3/ s ) Mar. 26, 1979, gage height, 8.29 ft (2.527 m) (backwater from ice); minimum, 0.01 fWs (0.001 nP/s) Sept. 17, 1977. EXTREMES FOR CURRENT YEAR.—Peak discharges above base of l80 ft3/s (5.10 m3/ s ) and maximum (*): Discharge Gage height Discharge Gage height Date Time (ft3/s ) (m3/s) (ft) (m) " Date Time (ft3/s ) (np/s) (ft) (m) Mar. 23 2045 *487 13.8 [ 5.6l 1.710 Apr. 17 1845 200 5.66 3.61 1.100 Apr. 4 1500 207 3.69 1.125 May 24 1300 237 6.71 3.84 1.170 May 31 1930 364 10.3 4.75 1.448 Minimum discharge, 1.5 ft3/ s (0.042 m3/ s ) Aug. 27, gage height, 1.09 ft (0.332 m).

DISCHARGE, IN CUBIC PEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 6.4 26 35 15 5.4 18 182 60 296 27 16 11 2 6.2 26 25 15 5.4 22 173 54 235 24 14 7.6 3 8.5 24 31 14 5.7 21 161 51 242 23 12 6.3 4 16 30 30 14 5-7 20 155 50 256 21 10 5.1 5 18 30 29 13 5.7 20 136 44 257 18 11 6.0 6 26 26 28 12 5-7 20 130 47 238 21 10 5.1 7 31 24 27 12 5.7 20 148 46 206 21 8.3 4.8 8 29 23 26 11 5.7 21 142 44 167 21 7.8 6.4 9 30 22 26 9.8 5.7 22 143 42 144 21 7.5 5.7 10 28 22 25 9.3 5.7 22 147 39 125 21 7.1 10 11 26 22 24 8.4 6.0 24 143 39 108 24 6.8 8.0 12 24 21 23 7.6 6.0 37 156 42 102 24 6.5 14 13 24 20 23 7.4 6.0 51 156 47 93 21 6.2 19 14 32 20 22 6.7 6.0 65 153 54 85 21 5.8 17 15 44 19 22 6.7 6.0 92 170 54 81 22 5.6 19 16 43 19 21 6.7 6.0 169 178 59 73 26 5.4 19 17 49 19 21 6.4 6.2 198 185 68 69 26 5.0 18 18 56 20 20 6.4 6.7 249 182 95 67 22 4.8 15 19 57 25 20 6.5 7.0 316 172 122 65 21 4.6 15 20 52 24 20 6.6 7.4 386 179 129 58 18 4.4 14 21 46 16 19 6.3 8.1 402 172 152 53 27 4.2 12 22 43 33 19 6.5 9.6 388 152 198 51 55 4.0 11 23 40 36 19 6.6 11 386 138 223 48 40 3.8 10 24 38 37 18 6.0 13 375 125 233 44 36 3.6 7.4 25 36 41 18 6.0 14 304 113 222 39 36 3.4 6.5 26 34 45 18 5.9 15 257 107 206 34 34 4.6 6.7 27 33 48 17 5.7 16 220 95 182 30 32 4.1 7.0 28 32 38 17 5-5 16 202 79 171 28 27 3.1 6.1 29 31 41 16 5.4 —— 191 70 153 27 23 7.5 5.8 30 29 43 16 5.4 ___ 184 60 160 29 20 11 8.5 31 28 —— 16 5.4 —— 191 —— 308 —— 18 9.5 —— TOTAL 996.1 840 691 259.2 222.4 4893 4302 3394 3350 791 217.6 307.0 MEAN 32.1 28.0 22.3 8.36 7.94 158 143 109 112 25.5 7.02 10.2 MAX 57 48 35 15 16 402 185 308 296 55 16 19 MIN 6.2 16 16 5.4 5.4 18 60 39 27 18 3.1 4.8 AC- FT 1980 1670 1370 514 441 9710 8530 6730 6640 1570 432 609 CAL YR 1981 TOTAL 9004 .28 MEAN 24.7 MAX 326 MIN .88 AC-PT 17860 WTR YR 1982 TOTAL 20263 .30 MEAN 55.5 MAX 402 MIN 3.1 AC-PT 40190 MINNESOTA RIVER BASIN 117 05319500 WATONWAN RIVER NEAR GARDEN CITY, MN LOCATION.—Lat 44°02'47", long 94°11'43", In SW4NE4 sec.28, T.l<07 N., R.28 W., Blue Earth County, Hydrologic Unit 07020010, on left bank 25 ft (7.62 m) downstream from bridge on County Highway 13, 1.5 miles (2.4 tan) west of Garden City, 7.3 mi (11.7 tan) upstream from mouth, and 9.2 mi (14.8 km) downstream from Perch Creek. DRAINAGE AREA.—812 mi 2 (2,103 tan2 ). PERIOD OP RECORD.—March 1940 to September 1945, 1953, I960, 1961, 1969, one or more discharge measurements each year, September 1976 to current year. REVISED RECORDS.—WDR MN-78-2: 1977. GAGE.—Water-stage recorder. Datum of gage is 905.05 ft (275.859 m) National Geodetic Vertical Datura of 1929. Prior to September 30, 1945, nonrecording gage at site 200 ft (61 m) upstream and at datum 0.17 ft (0.052 m) higher. REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.—11 years (water years 1941-45, 1977-82), 279 ft3/s (7.901 ra3 /s), 4.67 in/yr (119 mm/yr), 202,100 acre-ft/yr (249 hm3/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 5,620 ft3/s (159 m3/s ) May 21, 1944, gage height 9-84 ft (2.999 m) datum then in use; minimum daily, 1.9 ft3 /s (0.054 m3 /s) Jan. 20 to Peb. 8, 1977; minimum gage height, 0.27 ft (0.082 m) July 23, 1940, datum then in use. EXTREMES OUTSIDE PERIOD OP RECORD.—Plood of Apr. 7, 1965, reached a stage of 18.89 ft (5.758 m) at datum 0.17 ft (0.052 m) higher, from floodfnarks, discharge, 19,000 ft3/s (538 m3 /s). EXTREMES FOR CURRENT YEAR.—Peak discharges above base of 900 ft3/s (25-5 m3/s) and maximum (*): Discharge Gage height Discharge Gage height Date Time (ftVs) (mVs) (ft) (m) Date Time (ft 3/s) (m3/s) (ft) (m) Mar. 17 1315 Ice jam *6.28 1.914 Apr. 18 1015 1,000 28.3 3.97 1.210 Mar. 24 1100 *1,730 49-0 5.30 1.615 June 3 0745 1,210 34.3 4.38 1.335 Minimum discharge, 23 ft 3/s (0.65 m3/s) Aug. 23, 24, gage height, 0.74 ft (0.226 m).

DISCHARGE, IN CUBIC PEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL ADG SEP 1 62 145 113 41 28 60 736 286 1150 148 75 40 2 63 139 112 40 28 70 702 270 1180 134 69 42 3 67 135 110 38 28 80 739 256 1180 128 61 40 4 80 132 108 37 28 84 705 249 978 121 61 37 5 115 132 102 36 28 88 700 267 759 110 96 34 6 140 131 98 35 28 92 627 306 636 136 136 32 7 144 129 94 34 28 110 607 281 566 156 121 31 8 140 126 90 33 28 140 620 263 565 164 99 30 9 126 120 86 32 28 177 551 254- 524 158 84 29 10 123 112 80 31 28 220 520 242 484 187 75 31 11 115 109 78 31 28 280 494 230 434 333 64 38 12 112 111 76 31 28 380 600 234 392 368 57 46 13 106 105 73 30 29 450 744 280 355 322 52 89 14 116 102 70 30 29 580 820 365 327 283 48 151 15 158 100 68 30 30 760 852 377 321 253 45 154 16 184 98 66 30 31 980 899 379 311 222 41 150 17 187 96 64 30 32 1200 966 409 298 201 39 149 18 199 95 63 29 33 1300 989 459 290 188 35 138 19 221 102 61 29 33 1400 906 531 273 171 33 124 20 211 106 60 29 34 1500 801 667 266 155 31 110 21 197 100 58 29 34 1600 719 792 253 180 28 97 22 186 102 56 29 35 1660 652 811 234 180 26 86 23 177 107 54 29 35 1670 599 712 218 177 24 80 24 169 108 52 29 36 1720 543 623 209 172 35 71 25 165 110 50 28 36 1570 486 554 209 152 44 66 26 165 112 49 28 40 1360 441 531 199 136 41 59 27 163 115 48 28 45 1160 390 622 187 123 43 56 28 162 117 47 28 50 941 351 643 177 110 34 53 29 158 117 46 28 811 324 660 168 99 30 50 30 153 115 44 28 —— 756 304 680 159 93 35 48 31 147 —— 43 28 —— 748 —— 1020 —— 83 37 —— TOTAL 4511 3428 2219 968 898 23947 19387 14253 13302 5443 1699 2161 MEAN 146 114 71.6 31.2 32.1 772 646 460 443 176 54.8 72.0 MAX 221 145 113 41 50 1720 989 1020 1180 368 136 154 MIN 62 95 43 28 28 60 304 230 159 83 24 29 CFSM .18 .14 .09 .04 .04 .95 .80 .57 .55 .22 .07 .09 IN. .21 .16 .10 .04 .04 1.10 .89 .65 .61 .25 .08 .10 AC-FT 8950 6800 4400 1920 1780 47500 38450 28270 26380 10800 3370 4290 CAL YR 1981 TOTAL 53113 MEAN 146 MAX 2690 MIN 13 CFSM .18 IN 2.43 AC-FT 105300 WTR YR 1982 TOTAL 92216 MEAN 253 MAX 1720 MIN 24 CFSM .31 IN 4.22 AC-FT 182900 NOTE: No gage-height record Dec. 15 to Jan. 13, Jan. 15 to Mar. 8. 148 MINNESOTA RIVER BASIN

05320000 BLUE EARTH RIVER NEAR RAPIDAN, MN LOCATION.—Lat 44°05'44", long 94°06'33", in SEJSEtt sec.6, T.107 N., R.27 W., Blue Earth County, Hydrologic Unit 07020009, on left bank 0.2 ml (0.3 km) downstream from abandoned powerplant of Northern States Power Co., 2 mi (3.2 km) west of Rapidan, 3.5 mi (5.6 km) downstream from Watonwan River, and 7.8 mi (12.6 km) upstream from Le Sueur River. DRAINAGE AREA.—2,430 mi 2 (6,290 km 2 ), approximately. PERIOD OP RECORD.—July 1909 to November 1910 (published as "at Rapidan Mills," no winter records), October 1939 to September 1945, July 19^9 to current year. REVISED RECORDS.—WSP 895: Drainage area. WSP 1508: 1910. GAGE.—Water-stage recorder. Datum of gage is 807.83 ft (246.227 m) National Geodetic Vertical Datum of 1929. July 20, 1909, to Apr. 28, 1910, nonrecording gage at site 0.2 mi (0.3 km) upstream at different datum. Apr. 29 to Nov. 12, 1910, nonrecording gage at' site 800 ft (244 m) upstream at different datum. Oct. 4 to Nov. 14, 1939, nonrecording gage at present site and datum. REMARKS.—Records good. AVERAGE DISCHARGE.—39 years {water years 1940-45, 1950-82), 844 ft3 /s (23.90 m 3 /s), 4.72 in/yr (120 ram/yr), 611,500 acre-ft/yr (754 hm3 /yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 43,100 ft 3 /s (1,220 m3 /s). Apr. 9, 1965, gage height, 21.36 ft (6.511 m), from floodmark; minimum, 6.9 fWs (0.20 m3 /s) Oct. 12, 1955, gage height, 1.04 ft (0.317 m). EXTREMES FOR CURRENT YEAR.—Maximum discharge, 5,760 ft 3 /s (163 m 3 /s) Mar. 24, gage height, 6.67 ft (2.033 m); maximum gage height, 9.53 ft (2.905 m) Mar. 2§ (backwater from ice); minimum, 116 ft^/s (3.29 nP/s) Feb. 18-19, gage height, 1.64 ft (0.500 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEE MAR APR MAY JUN JUL AUQ SEP 1 331 765 500 180 125 1100 2310 1260 3920 1130 576 400 2 321 732 490 180 125 1150 2190 1190 3780 1030 517 617 3 336 685 420 175 125 1200 2190 1130 3580 964 471 1070 4 355 663 400 170 125 1250 2220 1120 3160 902 453 1070 5 399 656 390 170 125 1200 2120 1330 2760 838 557 861 6 532 645 380 165 120 1150 1930 1520 2500 912 990 705 7 651 634 370 160 120 1130 1850 i860 2470 1020 1390 611 8 698 610 350 160 120 1100 1880 2080 3080 1440 1190 546 9 682 587 340 160 120 1090 1800 2080 3580 1940 987 498 10 666 567 330 155 120 1080 1690 19^0 3970 2660 849 472 11 645 540 315 155 118 996 1610 1720 3960 3720 727 446 12 611 523 310 150 118 1070 1730 1610 3320 3710 627 452 13 577 515 300 150 118 1280 2060 1630 2720 3550 553 466 14 576 500 290 150 118 1650 2270 2170 2410 3160 494 620 15 593 493 280 145 118 1900 2320 2970 2230 2580 452 1300 16 633 481 270 145 118 2080 2380 3490 2140 2250 408 1770 17 655 472 270 140 118 2360 2530 3830 2370 2170 377 1640 18 680 463 260 140 119 2670 2890 4010 2590 2260 346 1460 19 843 471 250 140 117 3070 3230 3910 2510 1970 322 1350 20 1020 460 240 140 120 3150 3210 3840 2360 1660 296 1250 21 1080 429 240 135 122 3860 2900 3840 2180 1530 272 1140 22 1030 391 230 135 133 4620 2590 3620 1950 1460 254 1030 23 959 441 230 135 148 5210 2370 3200 1760 1370 239 927 24 907 467 220 135 167 5330 2180 3020 1620 1270 254 850 25 879 490 220 135 188 4780 2020 3000 1550 1130 256 792 26 847 494 210 130 238 4240 1850 2940 1490 1000 307 727 27 829 510 210 130 518 3590 1690 3010 1540 896 338 667 28 799 534 200 130 865 3040 1530 3230 1450 803 318 623 29 790 557 195 130 —— 2700 1420 3400 1330 731 299 594 30 789 546 190 130 —— 2520 1330 3490 1230 699 278 559 31 779 ___ 185 125 —— 2410 3910 —— 640 282 TOTAL 21492 16321 9085 4580 4786 74276 64290 81350 75510 51395 15679 25513 MEAN 693 544 293 148 171 2396 2143 2624 2517 1658 506 850 MAX 1080 765 500 180 865 5330 3230 4010 3970 3720 1390 1770 MIN 321 391 185 125 117 996 1330 1120 1230 640 239 400 CFSM .29 .22 .12 .06 .07 .99 .88 1.08 1.04 .68 .21 .35 IN. .33 .25 .14 .07 .07 1.14 .98 1.25 1,16 .79 .24 .39 AC-FT 42630 32370 18020 9080 9490 147300 127500 161400 149800 101900 31100 50610 GAL YR 1981 TOTAL 332603 MEAN 911 MAX 7040 MIN 60 CFSM .38 IN 5.09 AC-FT 659700 WTR YR 1982 TOTAL 444277 MEAN 1217 MAX 5330 MIN 117 CFSM .50 IN 6.80 ' AC-FT 881200 149 MINNESOTA RIVER BASIN 05320500 LE SUEUR RIVER NEAR RAPIDAN, MN LOCATION.—Lat 44°06'40", long 94°02'28", In SW4 sec.35, T.108 N., R.27 W., Blue Earth County, Hydrologlc Unit 07020011, on right bank 600 ft (183 m) downstream from highway bridge, 1.8 ml (2.9 km) northeast of Rapldan, and 2.3 ml (3*7 km) upstream from mouth. DRAINAGE AREA.—1,100 ml 2 (2,850 km2 ), approximately. PERIOD OF RECORD.—October 1939 to September 1945, July 1949 to current year. GAGE.—Water-stage recorder. Datum of gage Is 775.76 ft (236.452 m) National Geodetic Vertical Datum of 1929. Prior to Nov. 15, 1939, nonrecording gage at same site and datum. REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.—39 years (water years 1940-45, 1950-82), 434 ftVs (12.29 m3/ s ), 5-36 In/yr (136 mm/yr), 314,400 acre-ft/yr (388 hm3/yr ). EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 24,700 ft3/s (700 mVs) Apr. 8, 1965, gage height, 22.10 ft (6.736 m), from floodmark; maximum gage height, 22.72 ft (6.925 m) May 22, I960, from floodmark; minimum dally discharge, 1.6 ftVs (0.045 m3 /s) Feb. 9-25, 1959; minimum gage height, 0.65 ft (0.198 m) Sept. 7-13, 1976. EXTREMES FOR CURRENT YEAR.—Peak discharges above base of 1,300 ft3/s (36.8 m3/ 3 ) and maximum (*): Discharge Gage height Discharge Gage height Date Time (ft3/ 3 ) (m3/s) (ft) (m) Date Time (ft3/ 3 ) (m3/s) (ft) (m) Mar. 21 2000 *3470 98.3 *6.70 2.042 May 9 0500 1480 41.9 4.31 1.314 May 20 1930 2430 68.8 5.53 1-686 Apr. 19 1230 1760 49.8 4.68 1.426 May 31 2400 2440 69-1 5.54 1.689 Minimum daily discharge, 43 ft 3/s (1.22 ra3/s) Feb. 3-8; minimum gage height, 1.27 ft (0.387 m) Aug. 15-

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 198! TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 131 391 282 73 44 247 1350 647 2350 403 138 122 2 121 373 288 71 44 400 1260 603 2040 373 131 130 3 124 351 216 69 43 450 1170 560 1730 353 117 182 4 155 337 205 68 43 475 1010 601 1470 323 115 236 5 161 324 200 66 43 480 902 917 1310 297 116 208 6 177 307 190 64 43 475 746 1180 1190 379 221 173 7 197 296 180 64 43 450 736 1360 1130 403 272 153 8 204 281 170 62 43 392 737 1410 1080 395 221 133 9 214 260 160 62 44 348 690 1470 1110 698 180 116 10 218 249 150 60 44 301 669 1390 1080 1020 151 108 11 213 240 145 59 44 400 653 1270 987 1100 129 102 12 201 230 140 58 44 520 742 1180 902 1110 105 116 13 190 223 130 57 45 700 941 1420 816 1070 87 127 14 241 233 120 56 45 900 1050 1890 763 935 80 136 15 273 264 115 54 46 1250 1080 2060 719 806 72 224 16 258 264 110 53 47 1700 1100 2290 657 696 68 346 17 276 265 108 52 48 2200 1290 2370 632 629 64 360 18 322 249 105 52 48 2900 1570 2390 633 644 60 334 19 424 264 100 51 49 2610 1730 2340 645 567 56 299 20 529 261 98 50 50 2680 1660 2390 663 473 54 260 21 535 200 97 49 52 3020 1540 2340 637 440 51 229 22 512 191 95 48 54 3070 1420 2100 581 393 49 199 23 479 251 92 47 56 3180 1300 1880 525 352 47 174 24 457 241 90 47 58 3050 1190 1770 503 313 50 155 25 443 237 88 46 61 2590 1090 1700 556 274 51 142 26 425 246 86 46 66 2250 998 1600 629 249 72 130 27 421 264 84 45 74 1950 897 1580 604 231 102 121 28 423 277 82 45 186 1690 813 1550 539 206 105 111 29 425 289 80 44 —— 1510 741 1510 491 190 100 107 30 427 298 78 44 —— 1400 693 1560 445 168 105 104 31 409 —— 76 44 —— 1370 —— 2370 —— 150 100 — - TOTAL 9585 8156 4160 1706 1507 44958 31768 49698 27417 15640 3269 5337 MEAN 309 272 134 55.0 53.8 1450 1059 1603 914 505 105 178 MAX 535 391 288 73 186 3180 1730 2390 2350 1110 272 360 WIN 121 191 76 44 43 247 653 560 445 150 47 102 CFSM .28 .25 .12 .05 .05 1.32 .96 1.46 .83 .46 .10 .16 IN. .32 .28 .14 .06 .05 1.52 1.07 1.68 .93 .53 .11 .18 AC-FT 19010 16180 8250 3380 2990 89170 63010 98580 54380 31020 6480 10590 CAL YR 1981 TOTAL 188049 MEAN 515 MAX 4420 MIN 24 CFSM .47 IN 6.36 AC-FT 373000 WTR YR 1982 TOTAL 203201 MEAN 557 MAX 3180 MIN 43 CFSM .51 IN 6.87 AC-FT 403000 150 MINNESOTA RIVER BASIN 05325000 MINNESOTA RIVER AT MANKATO, MN LOCATION.—Lat 44°09'58", long 94°00'57", in NWJNEJ sec.13, T.108 N., R.27 W., Nicollet County, Hydrologic Unit 07020007, on left bank 12 ft (3-7 m) downstream from bridge on U.S. Highway 169 in North Mankato, 1.1 mi (1.8 km) downstream from Blue Earth River and at mile 107.1 (172.3 km) upstream from Mississippi River. DRAINAGE AREA.—14,900 mi 2 (38,600 km 2 ), approximately. WATER-DISCHARGE RECORDS PERIOD OP RECORD.—May 1903 to current year (no winter records 1904, 1906-10, 1918-29). Monthly discharge only for some periods, published in WSP 1308. Published as "near Mankato": 1903-21. REVISED RECORDS.—WSP 875: 1917- WSP 955: Drainage area. WSP 1085= 1929- WSP 1238: 1903, 1908, 1919- WSP 1508: 1916(M), 19l8(M), 1926(M), 1928, 1930, 1932(M), 1938(M). WDR-MN-76-1: l88l(M). GAGE.—Water-stage recorder. Datum of gage is 747.92 ft (227-966 m) National Geodetic Vertical Datum of 1929. Prior to Oct. 19, 1921, nonrecording gage, at site 1.1 mi (1.8 km) upstream at datum 6.4 ft (2.0 m) higher. Mar. 15, 1922, to Nov. 30, 1924, nonrecording gage, and Dec. 1, 1924 to May 24, 1971, recorder at site 0.5 mi (0.8 km) downstream at present datum. May 25, 1971 to Aug. 14, 1977, recorder at site 0.2 mi (0.3 km) downstream at present datum. Aug. 14, 1977 to July 27, 1978, nonrecording gage at present site and datum. REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.—61 years (water years 1905, 1911-17, 1930-82), 2,712' ftVs (76.80 m3/s), 2.47 in/yr (63 mm/yr), 1,965,000 acre-ft/yr (2.42 kmVyr); median of yearly mean discharges, 2,487 ft^/s (70.4 mVs) 2.27 in/yr (58 mm/yr), 1,802,000 acre-ft/yr (2.22 krrH/yr) • EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 94,100 ft 3 /s (2,660 m 3 /s) Apr. 10, 1965, gage height, 29-09 ft (8.867 m); minimum observed, 26 fWs (0.74 m3 /s) Aug. 4, 1934. EXTREMES OUTSIDE PERIOD OP RECORD.—Maximum stage since Apr. 26, 1881, 29-9 ft (9-114 m) present site and datum, from floodmark, discharge, 110,000 ftVs (3,120 nP/ s ). EXTREMES POR CURRENT YEAR.—Maximum discharge, 15,500 ft 3 /s (439 mVs) Mar. 24, gage height, 15-02 ft (4.578 m); minimum daily discharge, 520 ft 3/s (14.7 m3 /s) Peb. 2-12; minimum gage height, 3-35 ft (1.021 m) Aug. 24, 26.

DISCHARGE, IN CUBIC PEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 965 1970 1520 780 525 1500 9140 6740 11100 2890 2170 871 2 925 1920 1470 760 520 2000 9070 6330 10600 2730 2010 1090 3 956 i860 1090 735 520 2500 9200 5930 9770 2590 1880 1540 4 1070 1800 1140 710 520 2600 9270 5710 8730 2480 1790 1750 5 1110 1760 1180 680 520 2550 9580 5980 7780 2330 1750 1600 6 1230 1700 1200 670 520 2400 9840 6100 7130 2460 2010 1410 7 1350 1680 1240 660 520 2270 10400 6230 6730 2390 2450 1270 8 1430 1710 1200 640 520 2100 10800 6260 6960 2580 2270 1160 9 1440 1660 1150 630 520 2100 11100 6150 7560 3260 1990 1070 10 1480 1630 1100 620 520 2250 11200 5910 7920 4230 1780 1040 11 1430 1600 1090 615 520 2340 11100 5550 7780 5730 1640 1030 12 1370 1550 1080 612 520 2300 11000 5300 7030 5910 1470 1150 13 1290 1520 1060 600 525 3000 11200 5370 6210 5910 1350 1280 14 1400 1500 1050 600 530 4000 11500 6110 5830 5510 1250 1330 15 1550 1480 1020 590 530 5390 11600 6960 5580 4810 1160 i860 16 1590 1420 1000 585 530 6330 11800 7820 5350 4310 1080 2600 17 1730 1360 965 580 530 7850 12300 8570 5430 4280 1010 2680 18 1890 1340 950 580 530 9070 13100 9260 5640 5170 935 2510 19 2050 1410 930 575 535 10400 14100 10100 5630 5610 866 2360 20 2290 1380 900 570 540 10800 14400 10900 5400 5480 799 2220 21 2330 1240 890 565 545 12300 13700 11100 5120 5140 725 2040 22 2290 1120 880 550 580 13600 12900 10600 4730 4770 692 1850 23 2190 1300 870 545 630 13600 12000 9540 4360 4820 631 1690 24 2120 1300 850 540 680 14200 11300 8870 4120 5130 700 1560 25 2130 1340 840 540 750 13000 10500 8550 3960 4870 717 1440 26 2090 1390 830 540 820 11900 9800 8270 3870 4210 652 1330 27 2070 1450 820 540 880 11000 9020 8230 3810 3540 802 1230 28 2060 1500 820 540 1100 10100 8320 8320 3570 3060 833 1150 29 2030 1540 810 540 —— 9670 7760 8270 3320 2740 880 1120 30 2040 1570 810 535 —— 9330 7180 8320 3090 2520 822 1100 31 2010 —— 790 530 —— 9220 —— 10500 —— 2320 771 TOTAL 51906 46000 31545 18757 16480 211670 324180 237850 184110 123780 39885 46331 MEAN 1674 1533 1018 605 589 6828 10810 7673 6137 3993 1287 1544 MAX 2330 1970 1520 780 1100 14200 14400 11100 11100 5910 2450 2680 MIN 925 1120 790 530 520 1500 7180 5300 3090 2320 631 871 CPSM .11 .10 .07 .04 .04 .46 .73 .52 .41 -27 .09 .10 IN. .13 .11 .08 .05 .04 .53 .81 .59 .46 .31 .10 .12 AC-PT 103000 91240 62570 37200 32690 419800 643000 471800 365200 245500 79110 91900 CAL YR 1981 TOTAL 808207 MEAN 2214 MAX 13800 MIN 342 CPSM -15 IN 2.02 AC-FT 1603000 WTR YR 1982 TOTAL 1332494 MEAN 3651 MAX 14400 MIN 520 CPSM -25 IN 3.33 AC-PT 2643000 151 MINNESOTA RIVER BASIN 05325000 MINNESOTA RIVER AT MANKATO, MN—Continued WATER-QUALITY RECORDS PERIOD OP RECORD.—Water years 1963-66, 1968 to current year. PERIOD OP DAILY RECORD.— WATER TEMPERATURES: October 1967 to September 30, 1981. SUSPENDED-SEDIMENT DISCHARGE: October 1967 to current year. REMARKS.—During the winter period, suspended-sediment samples were collected weekly and daily sediment load was estimated on the basis of water records and weekly sediment samples. Water temperature was obtained once-daily during open water period and weekly for the winter period. Temperature records for October 1, 1981 to September 30, 1982, were not published because of discrepancies. EXTREMES FOR PERIOD OP DAILY RECORD.— WATER TEMPERATURES: Maximum daily, 30.5°C July 15, 1980; minimum daily, 0.0°C on many days each year. SEDIMENT CONCENTRATIONS: Maximum daily mean, 2,850 mg/L Aug. 7, 1968; minimum daily mean, 13 mg/L Nov. 24, 1974, Feb. 18, 19, 1979. SEDIMENT LOADS: Maximum daily, 247,000 tons (224,100 tonnes) Apr. 9, 1969; minimum daily, 5.2 tons (4.7 tonnes) Nov. 6, 1976. EXTREMES FOR CURRENT YEAR.— SEDIMENT CONCENTRATIONS: Maximum dally mean, 1,330 mg/L May 31; minimum daily mean, 21 mg/L Dec. 1. SEDIMENT LOADS: Maximum daily, 37,700 tons (34,200 tonnes) May 31; minimum daily, 45 tons (41 tonnes) Jan. 27.

SUSPENDED-SEDIMENT, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN MEAN MEAN MEAN MEAN MEAN CONCEN­ CONCEN- CONCEN- CONCEN- CONCEN- CONCEN- TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS DAY (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH 1 85 221 158 840 21 86 90 190 45 64 169 684 2 71 177 152 788 30 119 90 185 46 65 73 394 3 63 163 176 884 42 124 90 179 46 65 27 182 4 80 231 195 948 42 129 90 173 48 67 47 330 5 91 273 202 960 60 191 90 165 50 70 74 509 6 87 289 183 840 78 253 90 163 50 70 91 590 7 88 321 180 816 98 328 90 160 50 70 116 711 8 119 459 159 734 126 408 90 156 50 70 173 981 9 100 389 160 717 169 525 90 153 50 70 113 641 10 98 392 168 739 175 520 92 154 50 70 76 462 11 101 390 155 670 167 491 94 156 50 70 80 505 12 91 337 147 615 136 397 96 159 50 70 82 509 13 91 317 148 607 120 343 94 152 50 71 108 875 14 129 488 152 616 114 323 91 147 50 72 215 2320 15 117 490 158 631 95 262 88 140 50 72 242 3520 16 123 528 142 544 90 243 84 133 50 72 290 4960 17 127 593 109 400 90 234 80 125 50 72 480 10200 18 149 760 109 394 90 231 76 119 50 72 658 16100 19 182 1010 105 400 90 226 70 109 50 72 595 16700 20 230 1420 89 332 90 219 65 100 50 73 468 13600 21 255 1600 78 261 90 216 60 92 50 74 575 19100 22 222 1370 71 215 90 214 55 82 50 78 760 27900 23 205 1210 91 319 90 211 50 74 50 85 650 23900 24 205 1170 79 277 90 207 46 67 50 92 705 27000 25 265 1520 66 239 90 204 41 60 50 101 534 18700 26 328 1850 73 274 90 202 35 51 50 111 510 16400 27 252 1410 59 231 90 199 31 45 50 119 398 11800 28 188 1050 48 194 90 199 33 48 63 187 440 12000 29 168 921 42 175 90 197 36 52 —— 425 11100 30 180 991 24 102 90 197 38 55 —— —— 412 10400 31 215 1170 —— —— 90 192 42 60 —— —— 420 10500 TOTAL 23510 15762 7890 3704 2244 263573 MINNESOTA RIVER BASIN 05325000 MINNESOTA RIVER AT MANKATO, MN SUSPENDED-SEDIMENT, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN MEAN MEAN MEAN MEAN MEAN CONCEN­ CONCEN­ CONCEN­ CONCEN­ CONCEN­ CONCEN­ TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS DAY (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) APRIL MAY JUNE JULY AUGUST SEPTEMBER 1 428 10600 217 3950 790 23700 240 1870 328 1920 85 200 2 459 11200 211 3610 520 14900 212 1560 291 1580 92 271 3 468 11600 218 3490 470 12400 250 1750 248 1260 127 528 4 600 15000 239 3680 387 9120 269 1800 246 1190 175 827 5 732 18900 329 5310 315 6620 249 1570 251 1190 187 808 6 690 18300 279 4600 308 5930 280 i860 270 1470 178 678 7 579 16300 260 4370 329 5980 260 1680 354 2340 143 490 8 487 14200 286 4830 331 6220 322 2240 350 2150 117 366 9 500 15000 308 5110 382 7800 508 4470 303 1630 105 303 10 450 13600 290 4630 331 7080 721 8230 272 1310 78 219 11 401 12000 231 3460 362 7600 847 13100 253 1120 80 222 12 370 11000 185 2650 311 5900 660 10500 210 833 78 242 13 381 11500 190 2750 272 4560 539 8600 148 539 84 290 14 312 9690 498 8220 289 4550 472 7020 111 375 78 280 15 255 7990 500 9400 280 4220 436 5660 99 310 171 859 16 224 7140 450 9500 301 4350 412 4790 101 295 505 3550 17 219 7270 439 10200 315 4620 412 4760 95 259 398 2880 18 230 8140 428 10700 321 4890 bio 7120 87 220 300 2030 19 239 9100 485 13200 302 4590 555 8410 73 171 189 1200 20 240 9330 535 15700 309 4510 519 7680 71 153 187 1120 21 229 8470 418 12500 258 3570 441 6120 70 137 210 1160 22 209 7280 327 9360 264 3370 411 5290 62 116 220 1100 23 202 6540 300 7730 275 3240 509 6620 57 97 161 735 24 218 6650 280 6710 257 2860 512 7090 65 123 119 501 25 270 7650 252 5820 290 3100 392 5150 68 132 112 435 26 312 8260 260 5810 278 2900 371 4220 71 125 109 391 27 328 7990 282 6270 237 2440 366 3500 92 199 88 292 28 291 6540 310 6960 232 2240 347 2870 88 198 81 252 29 257 5380 270 6030 283 2540 359 2660 74 176 92 278 30 230 4460 752 16900 271 2260 342 2330 49 109 79 235 31 —— —— 1330 37700 —— —— 313 I960 64 133 —— — - TOTAL —— 307080 —— 251150 _ _ 178060 _ _ 152480 __ 21860 ___ 22742 jOAD FOR YEAR: 1250055 TONS.

SED. BED BED BED BED BED BED BED SUSP. MAT. MAT. MAT. MAT. MAT. MAT. MAT. SEDI­ SIEVE SIEVE SIEVE SI EVE SIEVE SIEVE SIEVE SIEVE MENT, niAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. TEMPER­ SUS­ % FINER % FIMER % FINER % FINER % FINER % FINER % FINER % FINER ATURE PENDED THAN THAN THAN THAN THAN THAN THAN THAN DATE (DEG C) (MG/L) .062 MM .125 MM .250 MM .500 MM 1.00 MM 2. 00 1 MM 4.00 MM 8.00 MM (00010) (80154) (7033D (80165) (80166) (80167) (80168) (80169) (80170) (80171) APR 20. 9.0 317 78 28 73 94 99 100 153 MINNESOTA RIVER BASIN 05327000 HIGH ISLAND CREEK NEAR HENDERSON, MN LOCATION.—Lat 44°34'19", long 93°55'l8", in NE4NW4 sec.26, T.113 N., R.26 W., Sibley County, Hydrologlc Unit 07020012, on left bank 20 ft (6.1 m) downstream from bridge on County Road 6, 1.6 mi (2.6 km) upstream from mouth, and 3-1 mi (5.0 km) north of Henderson. DRAINAGE AREA. —237 mi 2 (614 km 2 ). PERIOD OP RECORD.—October 1973 to current year. May 1970 to September 1973, operated as a low-flow station only. GAGE.—Water-stage recorder. Datum of gage is 728.56 ft (222.065 m) National Geodetic Vertical Datum of 1929- REMARKS.—Records good except those for winter period, which are fair, and those for periods of no gage height record, Mar. 18 to June 29 and Aug. 24 to Sept. 19, which are poor. AVERAGE DISCHARGE. —9 years, 60.5 ft3/s (1.713 m3/s), 3.47 in/yr (88 mm/yr), 43,830 acre-ft/yr (54.0 hmVyr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 1.760 ft 3 /s (49.8 m3 /s) Aug. 25, 1981, gage height, 9.09 ft (2.771 m); minimum discharge, 0.20 ft3/s (0.006 m'/s) Jan. 4, 1981, result of freezeup. EXTREMES FOR CURRENT YEAR.—Peak discharges above base of 300 ft 3/s (8.50 m3 /s) and maximum (*): Discharge Gage height Discharge Gage height Date Time (ft 3 /s) (m3 /s) (ft) (m) Date Time (ft 3 /s) (m3 /s) (ft) (m) Mar. 19 unknown 850 24.1 unknown Apr. 18 unknown 860 24.4 unknown Mar. 31 1005 *1040 29.5 *6.37 1.942 May 24 unknown 400 11.3 unknown May 31 unknown 430 12.2 unknown Minimum daily discharge, 1.9 ft 3 /s (0.054 m3 /s) Aug. 13, 17, 18, 21; minimum gage height, 0.68 ft (0.207 m) Aug. 13, 14, 16-19, 21, 22.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 49 104 70 37 8.1 18 820 300 350 30 3.4 18 2 45 98 72 35 8.1 17 700 280 300 27 3.4 13 3 48 93 74 34 8.1 16 600 260 310 25 3.2 11 4 69 90 79 32 8.1 16 500 240 320 23 3.0 8.5 5 78 86 69 30 8.1 16 420 220 330 20 2.9 9.0 6 91 83 68 29 8.0 16 360 210 310 23 2.6 8.0 7 87 81 66 29 8.0 16 450 190 270 20 2.5 7.3 8 84 78 64 29 8.0 15 415 180 250 18 2.4 9.0 9 78 73 62 26 8.0 15 380 170 225 1618" 2.3 12 10 73 72 60 22 8.0 15 350 155 200 2.2 14 11 71 68 58 17 8.0 16 320 140 185 15 2.2 18 12 71 65 57 14 8.0 27 360 130 170 13 2.5 23 13 72 63 56 12 8.0 72 400 125 155 11 1.9 40 14 84 61 54 11 8.0 167 470 135 140 9.5 2.6 35 15 96 57 52 10 8.0 214 520 150 130 9-3 3.2 40 16 96 55 51 9-8 8.1 255 600 170 115 9.3 2.3 40 17 105 52 50 9.6 8.1 390 700 185 105 7.5 1.9 39 18 130 54 49 9.1 8.1 540 800 205 93 7.6 1.9 38 19 148 62 48 8.7 8.2 800 750 230 85 6.7 2.0 37 20 143 52 47 8.5 8.7 700 700 250 77 5.9 2.0 36 21 137 50 46 8.5 9.5 600 640 280 70 5.5 1.9 33 22 122 49 46 8.5 13 540 600 310 64 5.6 2.9 30 23 123 52 45 8.5 20 470 550 340 58 5.4 2.5 26 24 127 58 42 8.5 23 400 520 380 53 4.8 3.3 24 25 126 62 40 8.4 25 410 480 330 48 4.6 4.4 22 26 125 68 39 8.2 23 440 450 295 44 4.5 6.0 21 27 126 72 38 8.1 20 450 410 270 40 4.5 7.6 19 28 126 75 37 8.1 19 500 380 230 36 4.2 9.8 18 29 122 76 37 8.1 660 350 200 32 4.2 13 17 30 115 76 37 8.1 —— 840 329 290 30 3.8 18 20 31 110 —— 37 8.1 —— 994 —— 400 —— 3.4 16 —— TOTAL 3077 2085 1650 503.8 314.2 9645 15324 7250 4595 365-3 135.8 685.8 MEAN 99.3 69-5 53.2 16.3 11.2 311 511 234 153 11.8 it. 38 22.9 MAX 148 104 79 37 25 994 820 400 350 30 18 40 MIN 45 49 37 8.1 8.0 15 320 125 30 3.4 1.9 7.3 CFSM .42 .29 .22 .07 .05 1.31 2.16 .99 .65 .05 .02 .10 IN. .48 .33 .26 .08 .05 1.51 2.41 1.14 .72 .06 .02 .11 AC-FT 6100 4140 3270 999 623 19130 30400 14380 9110 725 269 1360 GAL YR 1981 TOTAL 21972.2 MEAN 60.2 MAX 1100 MIN 1.3 CFSM .25 IN 3.45 AC-FT 43580 WTR YR 1982 TOTAL 45630.9 MEAN 125 MAX 994 MIN 1 . 9 CPSM .53 IN 7.16 AC-PT 90510 NOTE.—No gage-height record Oct. 19-21, Mar. 18 to June 29, Aug. 24 to Sept. 19, and Sept. 24-30. 154 MINNESOTA RIVER BASIN 05330000 MINNESOTA RIVER NEAR JORDAN, MN LOCATION.—Lat 44°41'35", long 93°38'30", in NWJSWJ sec. 1, T.114 N., R.23 W., Carver County, Hydrologic Unit 07020012, on pier at center downstream side of bridge, 1.5 mi (2.4 km) northwest of Jordan, and at mile 39.4 (63.4 km) upstream from Mississippi River. DRAINAGE AREA.—16,200 mi 2 (42,000 km 2 ), approximately. WATER-DISCHARGE RECORDS PERIOD OP RECORD.—September 1934 to current year. Prior to Oct. 1, 1966, published as "near Carver, Minn". REVISED RECORDS.—WSP 955: Drainage area. WSP 1508: 1935. GAGE.—Water-stage recorder. Datum of gage is 690.00 ft (210.312 m) National Geodetic Vertical Datum of 1929. Prior to Oct. 1, 1966, water-stage recorder 2.8 mi (4.5 km) downstream with auxiliary nonrecording gage at present site and present datum. REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.—48 years, 3,400 ft3/s (96.29 m3 /s), 2.85 in/yr (72 mm/yr), 2,463,000 acre-ft/yr (3.04 km3/yr); median of yearly mean discharges, 3,006 ftVs (85.1 m3/s), 2.52 in/yr (64 mm/yr), 2,178,000 acre-ft/yr (2.69 knP/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 117,000 ft3/s (3,310 m3/s,) Apr. 11, 1965; maximum gage height, 35-07 ft (10.689 m) Apr. 12, 1965 (backwater from Mississippi River); minimum discharge, 79 fWs (2.24 nP/s) Nov. 17, 1955; minimum gage height, 2.66 ft (0.811 m) Nov. 22, 1935. EXTREMES FOR CURRENT YEAP.—Maximum discharge, 17,300 ft3/s (490 m3/s) Mar. 27, gage height, 21.49 ft (6-550 m); maximum gage height, 21.62 ft (6.590 m) Mar. 23 (backwater from ice); minimum daily discharge, 580 ft3/s (16.4 nP/s) Feb. 6-11; minimum gage height, 4.8l ft (1.466 m) Aug. 27, 28.

DISCHARGE, IN CUBIC PEET PER SECOND, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 1170 2700 2140 1090 595 1270 14700 9350 10400 3430 2480 1140 2 1140 2650 2100 1060 590 1770 14200 8660 11200 3220 2290 1120 3 1130 2620 2040 1030 585 2300 13800 8060 11500 3060 2130 1110 4 1190 2570 2010 1000 582 2400 13400 7500 11400 2900 1980 1260 5 1340 2490 1980 980 581 2410 13100 7130 10600 2750 1870 1590 6 1490 2430 1950 960 580 2340 13100 7230 9460 2650 1780 1630 7 1590 2370 1910 940 580 2290 13100 7300 8440 2660 1830 1520 8 1720 2330 1880 915 580 2240 13100 7340 7680 2590 2170 1400 9 1840 2300 1840 890 580 2220 13300 7380 7430 2640 2260 1320 10 1900 2280 1810 865 580 2190 13400 7240 7680 3060 2050 1280 11 1920 2250 1780 845 580 2220 13500 6960 7950 3810 1850 1260 12 1900 2220 1740 825 582 2650 13500 6550 7990 4990 1700 1260 13 1870 2180 1700 805 585 3200 13500 6300 7550 5470 1580 1300 14 1840 2140 1680 785 590 3900 13500 6340 6770 5550 1470 1410 15 1950 2110 1640 765 590 4600 13500 7030 6230 5350 1370 1560 16 2110 2090 1600 745 590 5700 13500 7840 5900 4860 1290 1770 17 2250 2050 1580 725 590 6800 13800 8540 5620 4370 1210 2330 18 2400 2010 1540 715 590 8080 14100 9260 5560 4160 1150 2630 19 2610 2040 1500 695 595 9800 14400 9900 5700 4590 1090 2580 20 2770 2050 1470 680 600 11000 14700 10400 5730 5120 1030 2440 21 2970 1900 1430 665 625 12700 15100 10900 5560 5190 961 2310 22 3090 1800 1400 645 645 14000 15500 11300 5280 4980 939 2180 23 3080 1880 1380 630 680 16100 15700 11400 4950 4650 876 2050 24 3010 1950 1340 625 760 17000 15500 11200 4640 4520 880 1920 25 2940 1990 1300 613 800 17000 15100 10500 4430 4750 855 1820 26 2900 2050 1280 607 815 17200 14500 9880 4260 4680 880 1740 27 2870 2110 1240 602 840 17200 13600 9520 4160 4270 848 1630 28 2850 2160 1200 600 1050 16900 12400 9300 4060 3720 869 1520 29 2810 2160 1180 600 —— 16400 11200 9210 3900 3230 946 1440 30 2770 2150 1140 599 —— 15800 10200 9140 3660 2890 1010 1380 31 2740 —— 1110 598 —— 15200 —— 9280 —— 2660 1030 TOTAL 68160 66030 49890 24099 17940 254880 412000 267940 205690 122770 44674 49900 MEAN 2199 2201 1609 777 641 8222 13730 8643 6856 3960 1441 1663 MAX 3090 2700 2140 1090 1050 17200 15700 11400 11500 5550 2480 2630 MIN 1130 1800 1110 598 580 1270 10200 6300 3660 2590 848 1110 CPSM .14 .14 .10 .05 .04 .51 .85 .53 .42 .24 .09 .10 IN. .16 .15 .11 .06 .04 .59 .95 .62 .47 .28 .10 .11 AC-PT 135200 131000 98960 47800 35580 505600 817200 531500 408000 243500 88610 98980 CAL YR 1981 TOTAL 970617 MEAN 2659 MAX 12400 MIN 380 CPSM .16 IN 2.23 AC-PT 1925000 WTR YR 1982 TOTAL 1583973 MEAN 4340 MAX 17200 MIN 580 CPSM .27 IN 3.64 AC-PT 3142000 155 MINNESOTA RIVER BASIN 05330000 MINNESOTA RIVER NEAR JORDAN, MN—Continued (National stream-quality accounting network station) WATER-QUALITY RECORDS PERIOD OP RECORD.—Water years 1963-69, 1972 to current year. PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE: July 1973 to current year. pH: January 1974 to current year. WATER TEMPERATURES: July 1973 to current year. DISSOLVED OXYGEN: July 1973 to current year. INSTRUMENTATION.—Water-quality monitor since July 1973. REMARKS.—Extremes are for years with 80 percent or more daily record. Letter K indicates non-ideal colony count. Water is pumped to a monitor that is inside a heated shelter; therefore, water temperature during the winter period may be affected. COOPERATION.—Water-quality monitor is operated by the Metropolitan Waste Control Commission, St. Paul, MN. EXTREMES FOR PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE (water years 1978, 1980-82): .Maximum, 1,280 micromhos Dec. 20, 1979; minimum, 324 micromhos June 3, 1980. pH (water years 1978, 1980-82): Maximum, 8.9 units May 4, Sept. 15, 1982; minimum, 6.4 units Aug. 11, 1982. WATER TEMPERATURES (water years 1978-82): Maximum, 30.0°C July 15, 1980; minimum, 0.0°C several days during winter period. DISSOLVED OXYGEN (water years 1978-82): Maximum, 19.6 mg/L Oct. 19, 1978; minimum, 2.5 mg/L Sept. 5, 1978. EXTREMES FOR CURRENT YEAR.— SPECIFIC CONDUCTANCE: Maximum, 1,200 micromhos Dec. 17; minimum, 418 micromhos Mar. 15. pH: Maximum, 8.9 units May 4, Sept. 15; minimum, 6.4 units Aug. 11. WATER TEMPERATURES: Maximum, 27.0°C Aug. 5; minimum, 0.0°C several days during winter period. DISSOLVED OXYGEN: Maximum, 14.9 mg/L Oct. 8, Mar. 31; minimum, 4.7 mg/L July 22.

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPE­ BARO­ SPE­ CIFIC METRIC STREAM- CIFIC CON­ PH PRES­ FLOW, CON­ DUCT­ PH LAB TEMPER­ SURE TUR­ INSTAN­ DUCT­ ANCE (STAND­ (STAND­ ATURE , TEMPER­ (MM BID­ TIME TANEOUS ANCE LAB ARD ARD AIR ATURE OP ITY DATE (CPS) (UMHOS) (UMHOS) UNITS) UNITS) (DEG C) (DEG C) HG) (NTU) (00061) (00095) (90095) (00400) (00403) (00020) (00010) (00025) (00076) OCT 28... 1200 2830 1020 922 8.6 8.1 16.0 6.0 767 22 DEC 23... 1215 1380 1160 1100 8.1 8.0 -4.0 .0 761 2.7 MAR 23... 1215 16100 525 500 8.1 7.7 7.0 .5 735 95 MAY 24... 1400 11100 900 901 8.5 8.1 17.5 15.0 746 40 JUL 07... 1530 2630 880 853 8.4 8.1 24.0 26.0 — 51 SEP 16... 1230 1760 790 802 8.6 8.0 16.5 16.0 752 16

OXYGEN, COLI- STREP­ HARD­ DIS­ PORM, TOCOCCI NESS MAGNE­ SODIUM SOLVED PECAL, FECAL, HARD­ NONCAR- CALCIUM SIUM, SODIUM, AD­ OXYGEN, (PER­ 0.7 KP AGAR NESS BONATE DIS­ DIS­ DIS­ SORP­ DIS­ CENT UM-MP (COLS. (MG/L (MG/L SOLVED SOLVED SOLVED TION SOLVED SATUR­ (COLS./ PER AS AS (MG/L (MG/L (MG/L RATIO DATE (MG/L) ATION) 100 ML) 100 ML) CAC03) CAC03) AS CA) AS MG) AS NA) (00300) (00301) (31625) (31673) (00900) (95902) (00915) (00925) (00930) (0093D OCT 28... 15.9 127 84 180 485 180 115 48 23 .5 DEC 23... 14.6 100 K1500 210 566 180 136 55 31 .6 MAR 23... 11.8 85 120 390 251 91 66 21 8.8 .3 MAY 24... 9.0 91 180 1000 430 170 103 42 14 .3 JUL 07... 7.2 92 K40 260 369 130 85 38 19 .4 SEP 16... 11.2 115 — 240 353 110 82 36 27 .6 156 MINNESOTA RIVER BASIN 05330000 MINNESOTA RIVER NEAR JORDAN, MN—Continued WATER QUALITY DATA, WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982 SOLIDS, SOLIDS, POTAS­ ALKA­ CHLO­ PLUO- SILICA, RESIDUE SUM OP SOLIDS, SIUM, LINITY SULPATE RIDE, RIDE, DIS­ AT 180 CONSTI­ DIS­ DIS­ LAB DIS­ DIS­ DIS­ SOLVED DEG. C TUENTS , SOLVED SOLVED (MG/L SOLVED SOLVED SOLVED (MG/L DIS­ DIS­ (TONS (MG/L AS (MG/L (MG/L (MG/L AS SOLVED SOLVED PER • DATE AS K) CAC03) AS S04) AS CL) AS P) SI02) (MG/L) (MG/L) DAY) (00935) (90410) (00945) (00940) (00950) (00955) (70300) (70301) (70302) OCT 28... 3.8 300 130 42 1.6 20 668 563 5100 DEC 23... 4.8 390 180 48 .4 18 782 708 2910 MAR 23... 4.7 160 69 21 .3 16 353 304 15300 MAY 24... 3.6 256 160 6.6 .4 17 701 501 21000 JUL 07... 3.7 243 140 32 .4 15 597 479 4240 SEP 16... 5.1 241 140 37 .3 19 . 560 491 2660

NITRO­ NITRO­ NITRO­ PHOS­ SEDI­ SED. GEN, GEN, GEN, AM­ PHOS­ PHORUS, MENT, SUSP. N02+N03 AMMONIA MONIA + PHOS­ PHORUS, ORTHO , SEDI­ DIS­ SIEVE DIS­ DIS­ ORGANIC PHORUS, DIS­ DIS­ MENT, CHARGE, DIAM. SOLVED SOLVED TOTAL TOTAL SOLVED SOLVED SUS­ SUS­ % FINER (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L PENDED PENDED THAN DATE AS N) AS N) AS N) AS P) AS P) AS P) (MG/L) (T/DAY) .062 MM (0063D (00608) (00625) (00665) (00666) (0067D (80154) (80155) (7033D OCT 28... 4.3 .030 1.50 .140 .010 .010 125 955 85 DEC 23... 9-7 .250 1.10 .090 .070 .070 54 201 52 MAR 23... 7.7 .480 2.00 .430 .220 .210 466 20300 67 MAY 24... 10 .070 .69 .190 .110 .100 308 9230 85 JUL 07... 6.2 .100 .60 .220 .070 .050 239 1700 92 SEP 16... 2.3 .060 1.70 .230 .090 .060 51 242 95

CHRO­ BARIUM, CADMIUM MIUM, CHRO­ COBALT, ARSENIC TOTAL BARIUM, TOTAL CADMIUM TOTAL MIUM, TOTAL ARSENIC DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ TOTAL SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS AS) AS AS) AS BA) AS BA) AS CD) AS CD) AS CR) AS CR) AS CO) (01002) (01000) (01007) (01005) (01027) (01025) (01034) (01030) (01037) DEC 23... 1215 1 1 100 99 <1 1 30 20 <1 MAR 23... 1215 4 3 100 66 2 <1 10 10 5 MAY 24... 1400 4 3 100 97 <1 1 20 10 2 SEP 16... 1230 5 5 100 88 <1 <1 <10 <10 1

MANGA­ COPPER, IRON, LEAD, NESE, MANGA­ MERCURY COBALT, TOTAL COPPER, TOTAL IRON, TOTAL LEAD, TOTAL NESE, TOTAL DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS CO) AS CU) AS CU) AS PE) AS PE) AS PB) AS PB) AS MN) AS MN) AS HG) (01035) (01042) (01040) (01045) (01046) (0105D (01049) (01055) (01056) (71900) DEC 23... <1 14 6 270 11 8 <1 70 55 .1 MAR 23... <1 14 2 5600 23 15 <1 420 57 <.l MAY 24... 1 8 6 3300 7 3 2 280 2 <.l SEP 16... <1 6 6 800 11 3 2 190 10 .2 157 MINNESOTA RIVER BASIN

05330000 MINNESOTA RIVER NEAR JORDAN, MN—Continued WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 NICKEL, SELE- SILVER, ZINC, MERCURY TOTAL NICKEL, SELE­ NIUM, TOTAL SILVER, TOTAL ZINC, DIS­ RECOV­ DIS­ NIUM, DIS­ RECOV­ DIS­ RECOV­ DIS­ SOLVED ERABLE SOLVED TOTAL SOLVED ERABLE SOLVED ERABLE SOLVED (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS HG) AS NI) AS NI) AS SE) AS SE) AS AG) AS AG) AS ZN) AS ZN) (71890) (01067) (01065) (01147) (01145) (01077) (01075) (01092) (01090) DEC 23... 5 50 10 MAR 23... 16 30 <4 MAY 24... 16 30 4 SEP 16... 7 30 <4 NAPH­ THA­ LENES, POLY- CHLOR- DI- DI- PCB, CHLOR. ALDRIN, DANE, ODD, DDE, DDT, AZINON, ELDRIN TIME TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (39516) (39250) (39330) (39350) (39360) (39365) (39370) (39570) (39380) MAY 24... 1400 HEPTA- METH- METHYL METHYL ENDO- HEPTA- CHLOR MALA- OXY- PARA- TRI- SULPAN, ENDRIN, ETHION, CHLOR, EPOXIDE LINDANE THION, CHLOR, THION, THION, TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (39388) (39390) (39398) (39410) (39420) (39340) (39530) (39480) (39600) (39790) MAY 24...

PARA- PER- TOX- TOTAL MI REX, THION, THANE APHENE, TRI- 2,4-D, 2, 4-DP 2,4,5-T SILVEX, TOTAL TOTAL TOTAL TOTAL THION TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (39755) (39540) (39034) (39400) (39786) (39730) (82183) (39740) (39760) MAY 24.., <1 .39 CHLOR- DI- PCB, PCN, ALDRIN, DANE, ODD, DDE, DDT, ELDRIN, TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TIME TERIAL TERIAL TERIAL TERIAL TERIAL TERIAL TERIAL TERIAL DATE (UG/KG) (UG/KG) (Ud/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KQ) (39519) (39251) (39333) (3935D (39363) (39368) (39373) (39383) OCT 28.. 1200 MAY 24.. 1400 4.0 .3 ENDO- HEPTA- HEPTA- METH- TOXA- SULPAN, ENDRIN, CHLOR, CHLOR LINDANE OXY- MIREX, PER- PHENE, TOTAL TOTAL TOTAL EPOXIDE TOTAL CHLOR, TOTAL THANE TOTAL IN BOT­ IN EOT- IN BOT­ TOT. IN IN BOT- TOT. IN IN BOT- IN IN BOT­ TOM MA­ TOM MA- TOM MA­ BOTTOM TOM MA- BOTTOM TOM MA- BOTTOM TOM MA­ TERIAL TERIAL TERIAL MATL. TERIAL MATL. TERIAL MATERIL TERIAL DATE (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (39389) (39393) (39413) (39423) (39343) (39481) (39758) (81886) (39403) OCT 28.., :.10 <1.0 MAY 24.. L.OO <10 GROSS GROSS GROSS GROSS GROSS GROSS RADIUM ALPHA, ALPHA, ALPHA, ALPHA, BETA, BETA, BETA, BETA, 226, URANIUM URANIUM DIS­ SUSP. DIS­ SUSP. DIS­ SUSP. DIS­ SUSP. DIS­ NATURAL DIS­ SOLVED TOTAL SOLVED TOTAL SOLVED TOTAL SOLVED TOTAL SOLVED, DIS­ SOLVED , (UG/L (UG/L (PCI/L (PCI/L (PCI/L (PCI/L (PCI/L (PCI/L RADON SOLVED EXTRAC­ TIME AS AS AS AS AS AS AS SR/ AS SR/ METHOD (UG/L TION DATE U-NAT) U-NAT) U-NAT) U-NAT) CS-137) CS-137) YT-90) YT-90) (PCI/L) AS U) (UQ/L) (80030) (80040) (01515) (01516) (03515) (03516) (80050) (80060) (0951D (22703) (80020) MAR 23... 1215 <6.5 7.1 7.6 .10 9.0 9.0 SEP 16... 1230 16 2.6 11 10 1.4 .14 10 158 MINNESOTA RIVER BASIN 05330000 MINNESOTA RIVER NEAR JORDAN, MM—Continued SPECIFIC CONDUCTANCE (M1CHOMHOS/GM AT 25 DE.J. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX WIN MEAN MAX MAX MIN MEAN OCTOBEK JANUARY 1 942 924 935 1120 1090 1100 1080 1050 1060 2 9 4'4 926 937 1130 1090 1100 1130 1080 1100 3 950 930 943 1120 1090 1100 1110 1080 1100 it —— — - 964 934 953 1140 1110 1120 1140 1090 1120 5 —— 984 948 967 1140 1100 1120 1140 1110 1120 6 1000 977 992 1120 1100 1110 1130 1090 1120 7 —— 1020 994 1010 1100 1080 1100 1110 1090 1030 8 1160 880 909 1030 1000 1020 1090 1050 1070 1130 1080 1100 9 903 885 893 1040 1030 1030 1110 1050 1090 1140 1100 1130 10 912 882 895 1050 1030 1040 1110 1010 1050 1150 1110 1130 11 933 901 918 1050 1020 1040 1040 1010 1030 1160 1130 1140 12 938 906 929 1040 1010 1020 1060 1020 1040 1170 1140 1150 13 955 924 934 1040 1010 1020 1060 1020 1040 1170 1140 1150 lit 922 900 912 1030 980 1000 1070 1020 1040 1160 1130 1140 15 925 884 904 1010 992 1000 1120 1070 1090 1140 1100 1120 16 916 856 892 1000 997 1160 1120 1140 1140 1100 1120 17 964 908 937 1000 946 975 1200 968 1030 1160 1130 1150 18 970 948 956 984 910 958 1020 972 991 1180 1140 1170 19 996 956 973 932 906 918 1030 998 1020 1180 1130 1160 20 1020 988 1000 937 905 922 1080 1020 1040 1140 1110 1120 21 1050 1020 1040 940 892 917 1110 1060 1080 1140 1120 1130 22 1040 928 974 951 907 931 1120 1100 1110 1120 1100 1110 23 960 930 944 956 926 945 1150 1110 1130 1120 1080 1100 24 1010 962 989 1000 950 984 1160 1130 1140 1090 1060 1070 25 1030 994 1010 1020 979 1000 1160 1130 1140 1080 1050 1070 26 1040 1010 1030 1020 996 1010 1140 1120 1130 1080 1060 1070 27 1050 1020 1030 1050 1020 1040 1140 1110 1130 1090 1040 1070 28 1030 1020 1020 1080 1060 1070 1130 1110 1120 1050 1000 1020 29 1040 940 982 1110 1070 1090 1150 1100 1130 1010 990 998 30 942 918 929 1130 1090 1110 1150 1110 1140 994 952 977 31 934 920 926 1130 1050 1090 980 960 969 MONTH 1130 892 992 1200 968 1090 1180 952 1100

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 972 958 966 842 778 807 916 904 906 2 990 966 979 872 834 855 866 818 840 904 884 897 3 986 964 976 838 818 827 886 866 880 4 990 972 981 838 818 829 874 842 860 5 994 978 985 746 720 730 844 814 830 6 994 976 759 715 739 822 752 783 7 1000 978 762 726 741 770 760 764 8 1000 982 992 828 764 797 777 747 767 9 1010 986 997 770 708 743 771 740 758 10 1000 984 994 774 742 760 811 765 784 11 1010 994 1000 773 738 755 856 808 836 12 1010 992 1000 790 754 776 863 847 855 13 1010 998 1000 838 796 822 856 776 816 14 1020 1000 1010 846 638 765 770 758 765 15 1010 992 1010 666 418 579 748 646 707 16 1010 996 999 546 462 510 676 638 659 17 1010 974 999 526 440 489 666 638 655 18 1010 990 998 550 478 514 698 654 679 19 1010 884 997 532 516 523 738 688 717 20 1000 789 990 516 490 501 806 732 773 21 1040 1000 1010 542 502 520 802 712 757 22 1080 1000 1040 548 532 542 730 688 708 23 1020 974 991 550 522 537 848 740 797 24 1030 974 998 548 524 536 884 846 867 25 1040 974 1010 576 550 563 896 878 888 26 1020 946 976 902 890 896 27 954 884 926 902 888 895 28 895 789 843 928 914 922 919 893 904 29 930 918 926 924 892 908 30 928 910 922 927 915 923 31 948 908 936 MONTH 1080 789 987 948 638 812 MINNESOTA RIVER BASIN 159 05330000 MINNESOTA RIVER NEAR JORDAN, MN—Continued SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 198! TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 915. 715 777 876 818 841 1070 1060 1070 590 484 517 2 810 772 790 860 846 853 1080 1050 1070 712 496 630 3 828 820 824 876 844 859 1090 1060 1080 734 652 693 4 922 824 872 874 832 858 1090 1060 1070 666 608 642 5 974 910 936 882 854 866 1050 1020 1040 546 580 6 1030 968 1000 886 856 874 1030 994 1010 762 554 656 7 1040 1020 1030 880 812 863 1010 920 960 838 758 794 8 1040 1030 1040 825 ' 725 779 936 824 876 878 836 854 9 1020 990 1010 818 790 807 832 682 765 880 864 872 10 970 784 877 825 789 806 750 694 721 878 810 851 11 852 802 836 798 692 753 808 764 785 828 756 799 12 828 784 801 858 790 819 784 758 773 13 896 828 864 829 796 810 784 742 765 14 936 902 921 856 834 843 736 684 706 15 976 938 958 776 736 894 866 , 881 718 672 16 1010 978 992 896 776 837 912 882 903 796 722 771 17 —— —— —— 894 866 884 912 840 886 802 788 797 18 —— —— —— 924 890 910 864 816 846 832 764 795 19 —— —— —— 1020 922 982 826 802 814 934 838 895 20 —— —— —— 1090 1050 798 718 764 974 934 955 21 ______940 678 742 752 698 731 1010 976 996 22 —— —— —— 766 674 712 710 682 696 1020 996 1000 23 —— —— —— 936 766 857 724 694 710 1030 954 993 24 992 974 985 1000 913 963 770 682 727 980 950 965 25 1000 984 992 1030 937 989 766 702 738 980 938 963 26 998 944 971 964 914 934 716 680 698 960 878 930 27 970 954 963 898 876 889 716 692 702 890 826 866 28 956 920 936 903 855 873 704 628 664 832 798 816 29 926 890 909 930 920 925 686 654 671 794 736 770 30 892 866 881 1030 972 1010 652 538 597 762 700 731 31 —— —— —— 1070 1030 1040 598 544 573 MONTH 1090 538 823 1030 484 802

PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 7.9 7.7 7.8 7.7 7.6 7.6 7.6 7.6 7.6 2 7-9 7-7 7.8 7.7 7.6 7.6 7.7 7.6 7.7 3 8.0 7.8 7.9 7.9 7.6 7.7 7.7 7.5 7.5 4 7.9 7.8 7.9 7.9 7.7 7.8 7.6 7.5 7.6 5 7.9 7.6 7.8 7.8 7.7 7.7 7.5 7-5 7.5 6 7.9 7.6 7.8 7.8 7.8 7.8 7.5 7.4 7.5 7 7.8 7.7 7.8 7-9 7.8 7.9 7.8 7.4 7.6 8 8.0 7.7 7-9 7-9 7.8 7.8 7-9 7.8 7.9 7.8 7.7 7.8 9 7.9 7-8 7.8 7.8 7.5 7.7 8.0 7.9 7-9 7.7 7.6 7.7 10 8.0 7.7 7.9 7-9 7.7 7.8 8.0 7.9 7.9 7-7 7.6 7.6 11 8.0 7.8 7.9 7.8 7.7 7.8 7.9 7.9 7.9 7.7 7.7 7.7 12 7.9 7.8 7.9 7.8 7.7 7.8 7.9 7.9 7.9 7.7 7-7 7.7 13 7.8 7.8 7.8 7.8 7.7 7.8 8.0 7.9 7-9 7.7 7-7 7.7 14 7.9 7.7 7.8 7.8 7.7 7.7 8.0 7.9 8.0 7-7 7.6 7.7 15 8.0 7.8 7.9 7.8 7.7 7.7 8.0 7.9 8.0 7.7 7.6 7.7 16 8.1 7.8 7.9 7.8 7.7 7.8 8.0 7.9 7-9 7.6 7.5 7.6 17 7.9 7.9 7.9 7.8 7.7 7.8 7.9 7-9 7.9 7.6 7.5 7.6 18 7.9 7.8 7.9 7.8 7.7 7.7 7.9 7.9 7.9 7.7 7.6 7.6 19 8.0 7.8 7-9 7.7 7.5 7.6 7.9 7.8 7.8 7.7 7.6 7.6 20 8.0 7.9 8.0 7.7 7.6 7.6 7.9 7.8 7.8 7.6 7.6 7.6 21 8.0 7.9 7.9 7.7 7.4 7.6 7.9 7.8 7.8 7.7 7.6 7.6 22 8.0 7.9 7.9 7.8 7.6 7.7 7.8 7.8 7.8 7.7 7.6 7.6 23 8.0 7.9 7.9 7.7 7.7 7.7 7.8 7.7 7.7 7.7 7.6 7.6 24 7.9 7.8 7.9 7.7 7.6 7.6 7-7 7.7 7.7 7.6 7.6 7.6 25 7-9 7.9 7.9 7.7 7.6 7.6 7.7 7.7 7-7 7.6 7.6 7.6 26 7.9 7.9 7.9 7.7 7.6 7.6 7.8 7.7 7.7 7.6 7.6 7.6 27 8.0 7.9 7-9 7.6 7.6 7.6 7.8 7.7 7-7 7.7 7.6 7.6 28 7.9 7.8 7.9 7.6 7.6 7.6 7.7 7-5 7.6 7-7 7.6 7.7 29 7.8 7.7 7.8 7.6 7.6 7.6 7.6 7.5 7-6 7.8 7.7 7.7 30 7.8 7.6 7.7 7.6 7.6 7.6 7.6 7.6 7.6 7.7 7.7 7.7 31 7.9 7.7 7.8 7.7 7.6 7.7 7.7 7.7 7.7 MONTH 8.0 7.4 7.7 8.0 7.5 7.8 7.8 7.4 7.6 160 MINNESOTA RIVER BASIN 05330000 MINNESOTA RIVER NEAR JORDAN, MN— Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 7.7. 7.7 7.7 7.9 8.0 8.3 7.3 8.3 2 7.7 7.7 7.7 7.9 7.9 7.7 7.5 7.6 8.5 . 7.6 8.1 3 7.7 7.7 7.7 7-9 7.9 7.6 7.5 7.5 8.7 8.1 8.4 4 7.7 7.7 7.7 7-5 7.4 7.5 8.9 8.5 8.7 5 7.8 7.7 7.7 8.7 8.4 8.6 6 7.8 7.6 7.8 8.4 8.1 8.3 7 7.8 7.7 7.8 8.1 7.7 8.0 8 7.8 7.7 7.8 8.0 7.2 7.7 9 7.8 7.7 7.8 8.1 7.5 7.8 10 7.8 7.7 7.8 8.6 7.9 8.2 11 7.8 7.7 7.7 8.6 8.3 8.4 12 7.8 7.7 7.7 8.6 7.1 8.4 13 7.7 7.7 7.7 8.4 8.1 8.3 14 7.7 7.7 7.7 8.3 8.1 8.2 15 7.7 7.7 7.7 8.2 8.1 8.1 16 7.7 7.7 7-7 8.3 8.0 8.2 17 7.7 7.7 7.7 8.1 8.1 8.1 18 7.7 7.7 7.7 8.2 8.0 8.1 19 7.8 7.7 7.7 8.3 8.0 8.2 20 7.8 7-7 7.8 8.2 8.2 8.2 21 7.8 7.8 7.8 8.1 8.0 8.0 22 7.8 7.8 7.8 7.9 7.7 7.8 23 7.9 7.8 7.8 8.0 7.4 7.6 24 7.9 7.8 7.9 7.9 7.5 7.7 25 7.9 7.9 7.9 7.8 7.6 7.7 26 7.9 7.9 7.9 7.8 7.5 7.6 27 7.9 7.9 7-9 7.7 7.5 7.6 28 8.0 7.9 7.9 7.9 7.5 7-7 8.1 7.6 7.8 29 8.0 7.4 7.7 8.2 7.8 8.0 30 8.0 7.5 7.7 8.3 8.0 8.2 31 8.3 8.1 8.2 MONTH 7.6 7.1 1.1

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 8.1 7.9 8.0 8.4 8.1 8.3 8.1 7.6 7.9 8.4 8.1 8.2 2 7.9 7.7 7.8 8.4 8.2 8.3 8.3 7.7 8.0 8.5 8.2 8.3 3 7.8 7.7 7.8 8.6 8.2 8.4 8.3 8.0 8.2 8.5 8.0 8.3 4 7.9 7.6 7.8 8.6 8.2 8.4 8.3 7.9 8.1 8.6 7.9 8.3 5 8.1 7.7 7.9 8.5 8.2 8.4 8.3 8.0 8.2 8.4 8.1 8.3 6 8.0 8.0 8.0 8.4 8.2 8.3 8.3 7.9 8.1 8.5 7.8 8.1 7 8.2 7.9 8.0 8.3 8.1 8.2 8.4 7.7 8.0 8.5 8.2 8.4 8 8.3 8.0 8.1 8.2 8.0 8.1 8.2 7.7 7.9 8.6 8.4 8.5 9 8.3 8.2 8.3 8.3 8.1 8.2 8.0 7.1 7.5 8.5 8.1 8.2 10 8.3 8.0 8.1 8.2 8.0 8.1 7.1 6.6 6.9 8.3 7.9 8.1 11 8.3 8.0 8.1 8.1 7.9 8.0 8.3 6.4 7.0 8.4 7.8 8.1 12 8.2 8.0 8.1 8.0 7.8 7.9 8.3 6.5 7.5 8.0 7.6 7.8 13 8.3 7.9 8.1 7.9 7.6 7.8 8.2 7.8 8.0 7.8 7.3 7.5 14 8.2 8.0 8.1 8.1 7.8 7.9 8.4 7.7 8.0 8.4 7.2 7.9 15 8.3 8.0 8.1 8.0 8.0 8.0 8.9 8.6 8.8 16 8.4 8.0 8.2 8.3 8.0 8.1 8.6 7.6 8.1 17 8.7 8.2 8.4 8.2 8.1 8.2 8.3 8.2 8.2 18 8.3 8.1 8.2 8.2 8.1 8.2 19 8.3 8.1 8.2 8.3 8.2 8.3 20 8.3 8.1 8.2 8.5 8.4 8.4 21 8.1 8.0 8.1 8.5 6.9 7.9 22 8.2 8.0 8.1 7.5 6.6 7.1 23 8.2 8.0 8.1 8.5 7.6 8.0 24 8.2 8.1 8.2 8.1 8.1 8.2 7.5 7.8 25 8.2 7.9 8.2 8.1 8.1 8.0 7.3 7.6 26 8.2 8.0 8.1 8.1 7.9 8.0 8.4 8.0 7.1 7.5 27 8.4 8.0 8.2 8.1 7.7 7.9 8.3 8.0 7.1 7.6 28 8.5 8.1 8.3 8.1 7.7 7.9 8.3 8.0 7.4 7.7 29 8.3 8.2 8.3 8.1 7.7 7.9 8.1 8.1 8.1 7.7 7.9 30 8.3 8.1 8.2 8.0 7.6 7.8 7.9 8.2 7.9 7.4 7.8 31 8.1 7.5 7.8 8.0 8.3 MONTH 8.6 7.5 1.1 8.9 6.6 8.0 161 MINNESOTA RIVER BASIN 05330000 MINNESOTA RIVER NEAR JORDAN, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 9-5 8.5 9.0 1.0 .5 .5 .5 .0 .5 2 9.0 8.0 8.5 .5 .5 .5 1.5 .5 1.0 3 8.5 8.0 8.5 .5 .0 .5 1.0 .5 .5 4 —— —— 9.5 8.5 9.0 1.0 .0 .5 1.0 .5 1.0 5 1 10.0 9.0 9.5 .5 .5 .5 1.5 .5 1.0 6 9-5 8.5 9.0 .5 .5 .5 .5 .5 .5 7 —— —— —— 8.5 8.0 8.5 1.0 .5 1.0 .5 .0 .5 8 11.5 10.5 11.0 8.0 7.0 7.5 1.0 .5 .5 1.0 .5 .5 9 11.0 10.5 11.0 7.0 5.5 6.0 1.0 .0 .5 .5 .0 .0 10 12.0 10.5 11.0 5.5 5.0 5.0 .5 .0 .5 .5 .0 .0 11 12.5 10.5 11.5 5.0 4.0 4.5 1.0 .5 .5 .5 .0 .5 12 12.5 11.5 12.0 5-0 4.0 4.5 .5 .5 .5 1.0 .5 .5 13 13.0 12.0 12.5 5.5 4.5 5.0 1.0 .5 .5 1.0 .5 .5 14 13-0 12.5 13-0 6.5 5-5 6.0 .5 .0 .5 .5 .0 .5 15 13-5 12.0 13.0 7.0 6.0 6.5 .5 .0, .0 1.0 .0 .5 16 13-0 11.5 12.5 7.5 6.5 7.0 .5 .0 .0 .0 .0 .0 17 12.5 11.5 12.0 7.0 6.0 6.5 .5 .0 .5 .5 .0 .5 18 11.5 10.0 11.0 6.5 4.5 6.0 .5 .0 .0 1.0 .5 .5 19 10.0 9.0 9.5 5.0 4.0 4.5 .0 .0 .0 1.0 .5 1.0 20 9.5 9-0 9.0 4.5 3-0 3.5 .5 .0 .5 1.0 .5 .5 21 9-0 8.0 8.5 2.5 1.5 2.0 1.0 .5 .5 1.5 .5 1.0 22 8.0 7.0 7.5 1.5 .5 1.0 1.0 .5 . .5 1.5 1.0 1.0 23 7.0 5.5 6.0 1.0 • 5 1.0 .5 .0 .5 1.5 1.0 1.0 24 5.5 4.0 4.5 2.0 1.0 1.0 1.0 .5 .5 1.0 .5 .5 25 4.0 3.5 3.5 2.0 1.5 2.0 1.0 .5 .5 1.0 .5 1.0 26 3.5 2.5 3.0 2.5 2.0 2.0 1.0 .5 1.0 1.0 .0 .5 27 4.5 3.5 4.0 2.0 2.0 2.0 1.0 .5 1.0 1.5 • 1.0 1.5 28 6.0 4.5 5.0 2.0 1.5 1.5 1.0 .5 .5 1.0 .5 1.0 29 7.5 6.0 6.5 2.0 1.5 1.5 1.0 .0 .5 1.5 1.0 1.0 30 9.0 7.5 8.0 1.5 .5 1.0 1.0 .5 .5 1.5 .5 1.0 31 9.5 8.5 9.0 1.0 .5 1.0 1.0 .5 .5 MONTH 10.0 .5 5.0 1.0 .0 .5 1.5 .0 .5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 1.5 .5 1.0 1.5 1.0 1.5 14.0 13.0 14.0 2 1.5 .5 1.0 1.0 1.0 1.0 2.5 2.0 2.0 14.5 13.5 14.0 3 1.0 .5 .5 1.0 .5 1.0 2.0 2.0 2.0 15.5 14.5 15.0 4 1.0 .5 .5 1.0 .5 .5 2.0 2.0 2.0 17.0 15.5 16.0 5 1.0 .0 .5 .5 .0 • 5 16.5 16.0 16.5 6 1.5 .0 1.0 .5 .0 .5 16.0 15.0 15.5 7 1.5 1.0 1.0 .5 .0 .0 14.5 14.0 14.0 8 1.5 1.0 1.0 .5 • 5 • 5 14.5 13.0 14.0 9 1.5 1.0 1.0 .5 .0 .5 15.0 14.0 14.5 10 1.5 1.0 1.0 1.0 • 5 .5 16.5 15.0 15.5 11 1.5 1.0 1.0 1.0 .5 1.0 17.5 16.0 16.5 12 1.5 1.0 1.5 1.0 1.0 1.0 17.0 15.5 17.0 13 1.5 1.0 1.0 1.5 1.0 1.0 17.0 16.5 17.0 14 1.5 1.0 1.0 1.5 1.0 1.0 17.5 17.0 17.0 15 1.5 1.0 1.0 1.0 1.0 1.0 17.5 17.0 17.0 16 1.5 1.0 1.0 1.5 1.0 1.0 18.0 17.0 17.0 17 1.5 1.0 1.0 1.5 1.0 1.0 17.0 17.0 17.0 18 1.5 1.0 1.0 1.5 .5 1.0 17.5 16.5 17.0 19 1.5 1.0 1.0 1.0 .5 1.0 18.0 17.0 17.5 20 1.5 1.0 1.0 1.0 .5 .5 17.5 17.0 17.5 21 1.5 1.0 1.0 1.0 .5 • 5 17.0 16.0 16.5 22 1.5 1.0 1.0 1.0 .5 .5 16.0 15.5 15.5 23 1.0 1.0 1.0 1.5 .5 1.0 11.0 10.0 10.5 15.5 15.0 15.0 24 1.0 1.0 1.0 2.5 1.5 2.0 12.5 11.0 11.5 15.5 15.0 15.5 25 1.5 1.0 1.0 2.0 2.0 2.0 13.0 12.5 13.0 16.0 15.5 15.5 26 1.5 1.0 1.5 13.5 13-0 13-5 15.5 15.0 15.5 27 1.5 1.0 1.5 14.0 13.0 13.5 15.5 15.0 15.0 28 2.0 1.0 1.5 13.5 13.0 13.0 16.0 15.5 15.5 29 13.5 13.0 13.0 17.0 16.0 16.5 30 13.5 13.0 13.0 18.0 16.5 17.5 31 18.0 17.0 17.5 MONTH 2.0 .0 1.0 18.0 13.0 16.0 162 MINNESOTA RIVER BASIN 05330000 MINNESOTA RIVER NEAR JORDAN, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 17.0 16.5 16.5 22.0 21.0 21.5 24.5 23.0 24.0 21.5 20.0 20.5 2 16.5 16.0 16.5 21.5 21.0 21.5 25.5 23.5 24.5 21.5 • 20.5 21.0 3 16.5 16.0 16.5 23.0 21.5 22.0 26.0 25.0 25-5 21.5 19.5 20.5 4 17.0 16.0 16.5 24.0 22.0 23-0 26.5 24.5 25-5 21.5 19-5 20.5 5 17.5 16.5 17.0 25.5 23.5 24.5 27.0 25.5 26.0 21.5 20.0 21.0 6 17.5 17.0 17.0 26.0 24.5 25.0 26.5 25.0 25-5 20.0 19.0 19.5 7 17.5 16.5 17.0 25.0 24.0 24.5 26.0 24.5 25-5 19.0 18.5 18.5 8 18.0 17.0 17.5 24.5 23.0 23.5 25.5 24.0 24.5 18.5 18.0 18.0 9 18.5 17.5 18.0 24.5 23.5 24.0 24.0 22.0 23.0 19-5 18.0 18.5 10 18.0 17.0 17.5 24.0 22.5 23.0 21.5 20.5 21.0 20.5 19-0 20.0 11 18.0 17.5 17-5 23.0 22.0 22.5 21.5 19-5 20.5 22.0 20.0 21.0 12 18.0 17.5 17.5 22.5 21.5 22.0 20.5 19.5 20.0 21.5 21.0 21.5 13 18.5 17.0 17.5 23.0 21.5 22.0 20.0 19.5 20.0 21.0 19.0 20.0 14 18.5 18.0 18.0 23.5 22.0 23.0 21.0 19-0 20.0 19.0 17.0 18.0 15 19-0 18.0 18.5 23.5 23.0 23.0 21.5 20.0 , 20.5 16.5 15-5 16.0 16 19.0 18.0 18.5 24.5 23.0 24.0 22.5 20.5 21.5 15-5 15.0 15.0 17 21.0 19.0 20.0 25.5 24.0 25.0 24.0 21.5 22.5 15.0 14.5 15.0 18 —— —— —— 26.0 24.5 25.0 24.0 23.0 23.5 15-5 14.0 15.0 19 —— —— —— 25.5 24.5 25.5 25-5 23.5 24.5 15.5 14.5 15.0 20 —— —— —— 26.5 25.0 26.0 25.5 24.0 24.5 15.0 14.5 14.5 21 —— —— —— 26.0 25.5 25.5 25.0 23.5 24.0 15.0 13-5 14.0 22 —— —— —— 26.5 25.5 26.0 24.0 23.0 23.5 15.0 13-5 14.0 23 —— —— —— 26.5 25.5 26.0 23.5 22.5 23.0 15.5 14.0 15.0 24 20.0 19.5 20.0 26.5 26.0 26.0 22.5 21.5 22.0 15.5 15.0 15.0 25 20.5 19-5 20.0 26.5 26.0 26.0 22.5 20.5 21.5 15.5 14.5 14.5 26 20.5 20.0 20.0 26.0 25.0 25.5 22.0 21.0 21.5 15.5 13-5 14.5 27 21.0 19.5 20.5 25.5 24.5 25.0 21.5 20.5 21.0 15.5 14.0 15.0 28 22.0 20.5 21.5 25.5 24.5 25.0 21.0 20.0 20.5 15.5 14.5 15.0 29 22.5 21.5 22.0 25.0 24.0 24.5 20.0 19.0 19.5 17.0 15.5 16.0 30 22.0 21.0 21.5 24.5 23.5 24.0 20.5 18.5 19.5 16.5 16.0 16.5 31 —— —— —— 24.0 23.0 23.5 20.5 19.5 20.0 —— —— —— MONTH 26.5 21.0 24.0 27.0 18.5 22.5 22.0 13-5 17.5

OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 —— —— —— 11.0 io.l 10.6 13.6 13.4 13.6 13.1 12.7 12.9 2 —— —— —— 11.3 10.3 10.8 13.8 13.5 13.6 13.0 12.5 12.7 3 —— —— —— 12.o 10.8 11.3 13.8 13.4 13.6 12.9 12.5 12.7 1) —— —— —— 11.6 10.7 11.2 13.0 12.7 12.8 12.8 12.4 12.6 5 —— —— —— H.7 10.6 11.2 13.0 12.6 12.8 12.7 12.4 12.5 6 —— —— —— 10.8 10.2 10.5 12.9 12.6 12.8 12.8 12.4 12.6 7 —— —— —— 11.0 io.2 10.5 12.9 12.6 12.8 14.4 11.2 12.2 8 14.9 12.3 13.7 11.4 10.2 10.9 13.1 12.7 12.9 H.4 10.9 11.1 9 13.2 11.2 12.1 12.3 10.8 11.6 13.2 12.9 13.1 11.8 11.0 11.3 10 13.2 10.3 11.6 11.7 10.9 H.3 13.6 13.0 13.3 11.3 10.9 11.2 11 13.7 10.7 12.1 11.6 10.9 H.3 13.5 13.2 13.3 11.3 11.0 11.2 12 12.6 10.6 11.6 11.8 11.0 11.3 13.4 13.1 13.3 11.5 10.9 11.2 13 11.3 10.1 10.5 11.8 11.1 11.4 13.3 13.1 13.2 11.3 11.0 11.2 14 12.4 9.3 10.7 11.9 11.1 11.5 13.5 13.2 13.4 13.8 11.0 11.8 15 12.6 9.8 11.0 11.7 11.0 11.3 13.3 13.0 13.2 12.5 11.6 11.9 16 12.1 9.7 10.8 11.9 11.1 11.5 13.1 12.8 13.0 12.4 11.8 12.1 17 10.6 9-5 9.9 12.5 11.5 12.0 13.8 10.9 13.2 12.2 11.5 11.9 18 10.8 9.2 10.0 12.3 11.7 12.0 14.2 13.5 13-9 12.1 11.6 11.9 19 11.8 10.1 10.9 12.1 11.7 11.9 14.1 13.8 14.0 12.2 11.6 12.0 20 12.4 10.9 11.6 12.0 11.6 11.8 13.9 13.5 13.7 12.5 11.9 12.1 21 12.5 11.1 11.8 12.8 12.5 12.6 13.7 13.4 13.5 13.2 11.9 12.6 22 12.6 11.5 12.1 14.0 13.6 13.8 13.6 13.3 13.5 11.4 10.7 11.0 23 13.1 11.5 12.3 14.1 13-8 13.9 13.5 13.0 13.3 11.2 10.5 10.9 24 12.8 12.2 12.5 13.9 13.5 13.7 13-3 13.0 13.1 11.3 10.5 11.0 25 13.7 12.4 13.0 13.7 13.4 13.5 13.1 12.8 12.9 11.4 10.7 11.1 \ 26 14.1 13.0 13.5 13.5 13.2 13.4 13.0 12.6 12.8 11.3 10.5 11.1 27 14.5 13.1 13.8 13.7 13-3 13.5 12.9 12.6 12.7 10.9 10.5 10.7 28 14.8 13.3 14.1 13-7 13.4 13.5 13.1 12.6 12.8 11.2 10.2 10.6 29 14.0 13.5 13.8 13.7 13.4 13.6 13-3 12.8 13.0 10.7 10.1 10.4 30 12.5 10.5 11.2 13.7 13.5 13.6 13.2 12.7 12.9 10.8 10.1 10.5 31 10.9 9.8 10.4 —— —— —— 12.9 12.7 12.8 , 11.0 10.1 10.5 MONTH 14.1 10.1 12.0 14.2 10.9 13.2 14.4 10.1 11.6 MINNESOTA RIVER BASIN 163

05330000 MINNESOTA RIVER NEAR JORDAN, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 10.9 10.1 10.5 12.8 12.2 12.6 14.2 12.8 13.6 10.2 9.9 10.1 2 10.8 10.0 10.4 13.1 12.2 12.7 13.7 13.0 13.4 10.4 10.0 10.2 3 11.1 10.3 10.6 13.3 13.0 13.2 13-7 13-3 13.5 10.3 9.9 10.1 4 11.4 10.6 11.0 13.5 12.8 13.2 13.7 13.5 13.6 10.4 9.7 10.0 5 11.6 10.9 11.2 13.6 13.0 13.4 9-7 9.1 8.4 6 11.8 10.8 11.2 13.8 13.1 13.4 9.2 8.4 8.8 7 11.6 10.4 10.9 13.8 13.3 13.6 9.4 8.7 9.0 8 11.6 10.7 11.2 13.6 13.3 13.4 9.6 9.4 9.5 9 11.6 11.0 11.3 13.6 13.2 13.4 9.8 9.5 9-7 10 11.6 10.8 11.3 13.4 13.0 13.2 9.6 9.3 9.4 11 11.5 9.9 10.6 13.3 11.6 12.3 9.5 9.1 9.2 12 11.0 10.0 10.5 11.8 10.7 11.5 9.0 8.6 8.8 13 10.6 10.0 10.2 12.0 10.7 11.6 9.5 8.0 8.3 14 10.5 9.8 10.1 12.4 11.7 12.0 8.5 8.1 8.4 15 10.5 9.7 10.1 12.6 12.2 12.4 8.4 8.0 8.2 16 10.6 10.1 10.3 13.1 12.4 12.7 8.4 8.0 8.3 17 10.9 10.2 10.4 13.5 12.9 13.2 8.5 8.1 8.3 18 11.2 10.0 10.4 13.7 12.7 13.3 9.2 8.2 8.7 19 11.1 10.2 10.6 13.7 13-1 13.4 8.9 8.3 8.6 20 10.9 10.5 10.7 13.7 13.2 13.5 8.8 8.5 8.7 21 11.2 10.8 11.0 13.9 13.4 13.6 8.7 8.2 8.4 22 11.4 11.0 . 11.2 14.0 13.5 13.8 8.7 8.2 8.4 23 11.8 11.1 11.5 14.0 13.4 13.7 10.6 10.4 10.5 8.6 8.1 8.3 24 12.2 11.6 11.9 13.8 13.4 13.6 10.6 10. 10.4 8.3 7.9 8.1 25 12.3 11.9 12.0 14.1 13.5 13.8 10.5 10, 10.2 9.5 7.9 8.8 26 12.4 11.9 12.1 13.9 9.3 12.0 10.2 9-9 10.0 9.2 8.8 9.0 27 12.6 12.1 12.3 10.5 8.5 9.6 10.1 9.8 9.9 10.0 8.6 9.0 28 12.5 12.1 12.3 13.3 9.9 11.2 10.0 9.6 9.8 9.0 8.5 8.8 29 —— 11.8 9.9 10.9 9.9 9.6 9.7 9-1 8.3 8.6 30 —— 14.4 9.9 12.5 10.1 9.4 9.9 8.8 8.1 8.4 31 ___ —— —— 14.9 13.3 14.1 8.6 7.8 8.2 MONTH 12.6 9.7 11.0 14.9 8.5 12.8 10.4

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE AUGUST SEPTEMBER 1 8.5 8.0 8.2 9.1 7.3 8.3 8.4 7.5 7.9 8.7 6.3 7.2 2 8.5 8.2 8.3 9.3 8.4 8.9 9.4 7.3 8.1 11.3 6.3 9.2 3 9.8 8.3 8.8 10.2 8.4 9.2 8.5 7.6 8.0 12.1 9.8 10.6 H 9.5 8.8 9.2 10.1 8.3 9.1 8.6 6.3 7.4 11.9 10.1 10.7 5 9.3 8.8 9.1 8.9 7.5 8.2 10.4 7.0 8.5 11.9 9.8 10.7 6 9.2 8.9 9.0 7.5 6.0 6.8 9.3 7.1 8.3 13.4 9.8 11.6 7 9.3 8.6 9.0 7.2 5.9 6.5 8.9 6.4 7.5 11.4 10.4 11.0 8 8.9 8.5 8.7 7.6 6.0 6.9 8.1 5.9 7.1 12.0 9-8 10.8 9 8.8 8.4 8.6 7.9 6.8 7.3 7.4 5.7 6.1 10.8 9.8 10.3 10 9.8 8.4 8.8 7.2 6.2 6.6 8.9 6.5 7.8 10.9 9.2 9.9 11 9-1 8.6 8.8 6.3 5.8 6.1 10.5 8.0 9.1 11.7 8.9 10.2 12 9.3 8.7 9.0 6.8 5-9 6.5 11.6 8.7 10.1 10.4 8.7 9.5 13 9.6 9.2 9.4 7.3 6.7 7.0 10.4 8.6 9.4 8.8 7.5 8.2 14 9.6 8.9 9.3 7.2 6.9 7.1 9.6 8.0 8.7 9.1 7.7 8.5 15 9-2 8.8 9.0 7.8 7.0 7.4 8.8 7.5 8.2 10.3 8.2 9.1 16 9.0 8.6 8.8 8.1 6.4 7.1 9.5 7.4 8.4 12.7 9.3 11.1 17 6.9 6.3 6.6 10.4 8.5 9.6 12.1 10.8 11.4 18 6.7 6.0 6.3 10.9 8.9 9.8 10.5 9.1 9.6 19 6.4 5.6 6.1 9.8 7.9 9.0 9.1 8.4 8.7 20 6.6 5.3 5.8 10.3 7.5 8.9 9.8 7.9 9.1 21 5.3 4.9 5.1 10.3 7.3 8.8 10.9 9.2 10.1 22 6.6 4.7 5.0 10.1 7.0 8.5 11.1 9.7 10.4 23 7.3 6.5 7.0 9.7 6.8 8.3 10.3 10.0 10.2 24 8.8 8.4 8.6 7.1 6.7 6.9 8.1 5.8 6.9 9.5 8.4 9.0 25 8.8 8.3 8.6 7.1 6.7 6.9 9.6 5.5 7.4 11.3 8.6 9.8 26 8.5 8.1 8.3 6.9 6.5 6.7 10.1 6.8 8.4 12.5 9.7 10.9 27 8.9 8.1 8.4 8.0 6.8 7.6 10.4 7.6 8.9 13.9 10.8 12.1 28 8.4 7.8 8.0 8.1 7.6 7.8 9.7 7.8 8.8 13.6 11.9 12.6 29 8.1 7.5 7.8 8.3 7.6 7.9 8.8 6.7 7.3 13.7 10.8 12.1 30 8.1 7.1 7.6 8.4 7.6 8.1 9.8 5.9 7.5 14.4 11.1 12.8 31 8.5 7.7 8.1 9.4 7.9 8.6 MONTH 10.2 4.7 7.1 11.6 5.5 8.3 14.4 6.3 10.3 164

LOCATION.—Lat 44°51'07", long 93°32'32", in NE^S^i sec.13, T.llo M., R.23 W., Carver County, Hydrologic Unit OT020012, at culvert on Highway 101, 0.7 mi (1.1 km) south of intersection of State Highways 5 and 101, near Chanhassen. DRAINAGE AREA.—3-37 mi 2 (10.02 km 2 ). PERIOD OF R3CORD.--October 1981 to September 1982 (no winter records). GAGS.— via. tar-stage recorder. REMARKS.—Records good except those for periods of no gage-height recorJ, Oct. 1 to Nov. 5 and Mar. 19 to Mar. 22, which are poor. EXTREMES FOR CJRREMT YEAR.—Maximum discharge, 15 ft^/s (0.42 m 3 /s) Mar. 31, gage height, 8.41 ft (2.563 m); no flow on many days.

DAY OCT MOV DEC FE3 MAR MAY JiJL 1 .05 .01 13 3.9 2 .04 .01 12 3.4 .70 3 .04 .01 12 2.9 .64 4 .04 .01 11 2.5 .59 .04 .01 10 2.3 .51 6 .04 9.3 2.1 .48 1 .04 8.4 1.9 .54 8 .03 7.5 1.7 .67 9 .03 6.4 1.9 .70 10 .03 5-3 2.0 .54 11 .03 4.4 2.0 .47 12 .03 3.9 2.2 .38 13 .02 3-7 3.1 .27 14 .02 3.3 3.8 .24 15 .02 3.1 4.1 .29 16 .02 3.2 4.7 .24 17 .02 6.7 5.1 .15 18 .02 8.3 6.1 .14 19 .02 .60 8.0 5.8 ,12 20 .02 3.1 8.4 5.2 21 6.2 8.2 4.4 .02 22 .02 12 7.4 3.7 .00 23 .02 10 6.7 3.1 .00 24 .01 11 6.3 2.8 .01 25 .01 11 6.0 2.4 .00 .01 9.1 5.5 2.2 .00 27 .01 7-2 5.1 2.2 .00 28 .01 6.2 4.8 1.9 .00 29 .01 7.6 4.6 1.7 .00 30 .01 11 4.2 1.5 .00 31 .01 I'l 1.3 TOTAL .74 207.2 93.9 8.64 14EAN .024 6.91 3.03 MAX .05 13 6.1 , MIN .01 3.1 1.3 .00 AC-FT 1.5 411 186 It 165 MINNESOTA RIVER BASIN 445023093305201 LAKH: RILEY INLET NEAR SHAKOPEE, MN LOCATION.—Lat 44°50'23", long 93°30'52", in NEJS^i sec.19, T.116 N., R.22 W., Hennepin County, Hydrologic Unit 07020012, at double culverts on RIley Lake Road, 1.7 mi (2.7 km) southeast of intersection of State Highways 5 and 101, between Chanhassen and Shakopee. DRAINAGE AREA. —5.69 mi 2 (14.74 km 2 ).

PERIOD OP RECORD.—October 1981 to September 1982 (no winter records). GA3E.--Water-stage recorder. REMARKS.—Records good except those for periods of no prage-height record, Oct. 1 to Nov. 30 and Mar. 25 to Mar. 31. which are poor. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 25 ft 3 /s (0.71 m 3 /s) Mar. 26, ga

DISCHARGE, IN CUBLJ PEEP PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT N'OV DEC JAN PEB MAR APR MAY JUN JUL AUG 1 2.2 .12 16 1.6 1.3 .00 .00 .00 2 2.0 .10 17 1.2 1.0 .00 .00 .00 3 1.9 .09 20 • 99 .74 .00 .00 ..00 4 1.8 .08 18 2.3 .43 .00 .00 .00 5 1.7 .07 18 3.9 .28 .00 .00 .00 6 1.5 .06 17 3.7 .17 .00 .00 .00 7 1.4 .05 16 3-5 .12 .00 .00 .00 8 1.3 .04 16 3-2 .06 .00 .00 .00 9 1.2 .04 15 3.3 .06 .00 .00 .00 10 1.1 .03 14 3.1 .01 .00 .00 .00 11 1.0 .03 13 2.8 .01 .00 .00 .00 12 .96 .03 12 2.7 .00 .00 .00 .00 13 .88 .02 11 3-0 .00 .00 .00 .00 14 .82 .02 9.9 3.6 .00 .00 .00 .00 15 .75 .02 9.2 4.1 .00 .00 .00 .00 16 .69 .02 9.4 5.8 .00 .00 .00 .00 17 .63 .02 10 7.1 .00 .00 .00 .00 18 .57 .02 10 8.1 .00 .00 .00 .00 19 .52 .02 11 8.4 .00 .00 .00 .00 20 .48 .02 13 8.1 .00 .00 .00 .00 21 .43 .01 13 7.4 .00 .00 .00 .00 22 .38 .01 13 6.3 .00 .00 .00 .00 23 .35 .01 12 4.5 .00 .00 .00 .00 24 .31 .01 11 2.9 .00 .00 .00 .00 25 .28 .01 3.9 8.9 2.3 .00 .00 .00 .00 26 .25 .01 21 6.5 2.0 .00 .00 .00 .00 27 .22 .01 22 4.9 2.3 .00 .00 .00 .00 28 .20 .01 14 4.1 2.3 .00 .00 .00 .00 29 .18 .01 13 3.0 1.8 .00 .00 .00 .00 30 .16 .01 13 2.1 1.6 .00 .00 .00 .00 31 .13 — 15 —— 1.5 — .00 .00 —— TOTAL 26.29 1.00 354.0 115.39 4.18 .00 .00 .00 MEAN .85 .033 11.8 3.72 .14 .000 .000 .000 MAX 2.2 .12 20 8.4 1.3 .00 .00 .00 MIN .13 .01 2.1 .99 .00 .00 .00 .00 AC-FT 52 2.0 702 229 8.3 .00 .00 .00 166 MINMESOT1 RIVER BASIN 444121093293801 SPRING LAKE INLET BEFORE POND HEAR PRIOR LAKE, MN LOCATION.—Lat 44°41'21", long 93°29'38", in SE^SWi sec.8, T.114 N., R.22 W. , Scott County, Hyrlrologic Unit 07020012, inflow to pond, below culvert on State Highway 13, 0.4 mi (0.6 km) above Spring Lake, 0.2 mi (0.3 km) east of junction with State Highways 13 and 282, west of Prior Lake. DRAINAGE AREA. —8.71 mi 2 (22.56 km 2 ).

PERIOD OP RECORD.—October 1981 to November 1982 (no winter records). GAGE.--Water-stage recorder.

REMARKS.—Records good except those for periods of no gage-height record, Oct. 1 to Dec. 13 and Mar.16-29, which are poor. EXTREMES 70 R CURRENT PERIOD.—Water year 1982: Maximum discharge, 80 ft^/s (2.2? m^/s) Apr. 4, gage height, 7.90 ft (2.408 in); no flow on many days. October to November 1982: Maximum discharge luring period, 16 ft-Ys (0.45 m^/s) rjov. 12, gage height, 7-01 ft (2.137 rn); minimum, 0.23 ft-Vs (0.007 mVs) Oct. 1-7, gage height, 5.62 ft (1.713 m).

DISCHARGE, IN 3UB[f

DAY NOV APR JlJi AUC .02 .09 30 4.6 6.4 .03 .07 23 3.9 3.2 4.5 3 .03 .06 21 3-1 2.1 1.9 4 .03 .04 38 3-3 1.4 1.2 5 .04 .03 20 6.5 .83 1.1 6 .04 .03 13 6.3 .45 .23 7 .05 .02 16 5.6 .55 .23 8 .06 .02 15 4.4 .50 .23 9 .07 .02 14 .25 .09 10 .09 .01 13 .08 .12 11 .11 .01 12 2.7 .04 .23 12 .15 .01 11 3.5 .02 .23 13 .19 .01 11 7.2 .01 .23 14 .25 10 6.9 .01 .23 15 • 32 9.8 6.8 .01 .23 16 .43 2.3 11 8.9 .01 1.2 17 .62 6.2 14 9-3 .01 1.2 18 .74 10 12 12 .01 .33 19 .90 14 11 9.8 .01 1.2 20 1.1 17 13 8.5 .01 1.2

21 1.0 21 12 7.3 .01 .23 22 .88 25 11 6.8 .01 .23 23 .74 40 9.5 6.7 .01 .10 24 .66 62 8.7 6.4 .03 .00 25 .48 56 7-9 5.3 .03 .16 26 .34 48 7.3 4.6 .00 .23 27 .25 41 6.6 5.0 .00 .23 28 .20 35 5.6 4.3 .00 .23 29 .16 33 5.6 4.0 .00 .23 30 .12 41 5.3 4.3 .00 .23 31 45 5.9 TOTAL 10.10 '(02.3 182.3 14.29 24.15 MEAN .34 13.4 5.88 .48 .81 MAX 1.1 38 12 4.7 6.4 MIN .02 5.3 2.7 .00 .00 AC-PT 20 798 362 28 48 16? MINNESOTA RIVER BASIN 444121093293801 SPRING LAKE INLET BEFORE POND NEAR PRIOR LAKE, MN—Continued

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1982 TO SEPTEMBER 1983 MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 .23 3.2 2 .23 3.2 3 .23 3.1 4 .23 2.8 5 .23 2.8 6 .23 2.6 7 .23 2.6 8 1.3 2.6 9 1.5 4.1 10 1.5 8.5 11 1.4 9.3 12 1.4 12 13 1.4 7.0 14 1.4 6.8 15 1.3 6.7 16 1.3 6.5 17 1.2 6.3 18 1.1 6.6 19 1.6 7.1 20 7.9 7.5 21 9.9 —— 22 8.3 —— 23 7.4 — _ 24 6.8 _ _ 25 6.4 —— 26 5.3 __ 27 4.4 —— 28 3.9 —— 29 3.7 —— 30 3.4 —— 31 3.1 —— TOTAL 88.51 _ _ MEAN 2.86 MAX 9.9 —— MIN .23 —— AC-FT 176 —— 168 MINNESOTA RIVER BASIN 444128093293401 SPRING LAKE INLET AFTER POND NEAR PRIOR LAKE, MN LOCATION.—Lat 44 o 4l'28", long 93°29'3 1* 11 , in SE4SW4 sec.8, T.114 N., R.22 W., Scott County, Hydrologic Unit 07020012, outflow from pond, 500 ft below culvert on State Highway 13, 04 mi (0.6 km) east of junction with State Highways 13 and 282, west of Prior Lake. DRAINAGE AREA. —8.80 mi 2 (22.79 km 2 ). PERIOD OP RECORD.—October 198l to November 1982 (no winter records). GAGE.—Water-stage recorder. REMARKS.—Records good except those for periods of no gage-height record, Oct. 1 to Dec. 10, 1981, Mar. 18-29, 1982, and Oct. 2-4, 1982, which are poor. EXTREMES FOR CURRENT PERIOD.—Water year 1982: Maximum discharge, 58 ftVs (1.64 m3/s) Apr. 4, gage height, 2.92 ft (1.890 m); no flow on many days. October to November 1982: Minimum discharge during period, 8.3 ft^/s (0.24 m^/s) Nov. 12, gage height, 1.90 ft (0.579 m); minimum, 0.22 ftVs (0.006 m?/s) Oct. 1, 4, gage height, 0.68 ft (0.207 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 .86 .84 .05 . — 29 2.9 2.7 .17 .00 2.3 2 .86 .84 .04 —— 23 2.7 2.4 .12 .00 2.7 3 .86 .84 .04 . — 20 2.5 2.2 .09 .00 1.7 4 .86 .83 • 03 . — 40 2.4 2.0 .07 .00 1.2 5 .86 .83 .02 — 18 2.9 1.8 .05 .00 1.2 6 .86 .83 .02 .__ 14 2.8 1.6 .07 .00 1.1 7 .86 .83 .02 . — 12 2.6 1.9 .06 .00 1.0 8 .86 .83 .01 —— 11 2.5 2.0 .04 .00 .91 9 .86 .83 .01 . — 10 2.5 1.7 .04 .00 .85 10 .86 .83 .01 9.1 2.3 1.4 .50 .00 .91 11 .86 .82 __ . _ 8.3 2.1 1.3 .54 .00 .88 12 .86 .82 __ —— 7.8 2.3 1.1 .30 .00 .93 13 .86 .82 _ — . — 7.3 3.1 1.0 .17 .00 .92 14 .85 .82 —— —— 6.7 3.0 .99 .12 .00 .88 15 .85 .82 —— 6.4 3.1 .98 .10 .00 .81 16 .85 .82 __ _ _ 6.9 4.4 .89 .08 .00 .84 17 .85 .82 —— . — 9.4 4.9 .88 .07 ..00 .72 18 .85 .81 — _ 13 8.0 7.0 .86 .06 .00 .62 19 .85 .81 —— 21 7.3 5.6 .67 .04 .00 .53 20 .85 .81 —— 18 8.3 4.8 .58 .03 .00 .41 21 .85 .70 __ 16 7.9 4.0 .50 .04 .00 .39 22 .85 .50 —— 17 6.9 3.7 .39 .15 .00 .37 23 .84 .40 —— 30 6.0 3.4 .26 .10 .00 .33 24 .84 .30 —— 45 5.4 3.2 .57 .04 .02 .34 25 .84 .22 —— 51 4.9 3-1 .95 .04 .03 .32 26 .84 .18 __ 52 4.4 2.9 .75 .19 .03 .27 27 .84 .14 _ _ 47 4.0 3.0 .53 .15 .06 .25 28 .84 .11 —— 37 3.6 2.8 .39 .08 .04 .22 29 .84 .09 _ _ 27 3.4 2.8 .32 .03 .08 .22 30 .84 .07 —— 31 3.2 2.7 .22 .01 .16 .25 31 .84 —— 34 2.9 —— .00 .12 —— TOTAL 26.39 19.21 __ _ 312.2 100.9 33.83 3.55 .54 24.37 MEAN .85 .64 —— . — 10.4 3.25 1.13 .11 .017 .81 MAX .86 .84 —— '40 7.0 2.7 .54 .16 2.7 MIN .84 .07 —— . — 3.2 2.1 .22 .00 .00 .22 AC- FT 52 38 —— 619 200 67 7.0 1.1 48 MINNESOTA RIVER BASIN 169 444128093293401 SPRING LAKE INLET AFTER POND NEAR PRIOR LAKE, MN—Continued DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1982 TO SEPTEMBER 1983 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 .25 2.3 2 .26 2.3 3 .27 2.3 it .28 2.3 5 .29 2.4 6 .36 2.3 7 .44 2.3 8 .79 2.1 9 .91 2.0 10 .86 3.1 11 .84 4.4 12 .84 7.4 13 .89 7.8 lit .88 6.6 15 .90 5.1 16 .88 4.5 17 .86 3.7 18 .86 3.4 19 1.1 3.9 20 2.8 5.1 21 4.0 _ _ 22 3.5 —— 23 3.0 — _ 24 2.5 —— 25 2.3 —— 26 2.1 __ 27 1.9 — _ 28 2.0 _ — 29 2.0 —— 30 2.1 —— 31 2.1 —— TOTAL 43.06 __ MEAN 1.39 —— MAX 4.0 —— MIN .25 —— AC-PT 85 —— 170 MINNESOTA RIVER BASIN 444214093273001 SPRING LAKE OUTLET NEAR PRIOR LAKE, MN LOCATION.—Lat 44°42'14", long 93°27'30", in SEJSEi sec.4, T.114 N., R.22 W., Scott County, Hydrologic Unit 07020012, on northeast side of lake at culvert on County Road 12, west of Prior Lake. DRAINAGE AREA. —19.6 mi 2 (50.8 km 2 ). PERIOD OP RECORD.—October 1981 to December 1982. GAGE.—Water-stage recorder. REMARKS.—Records good except those for periods of no gage-height record, Oct. 1, 1981, to Mar. 24, 1982, and Sept. 1 to Oct. 13, 1982, which are poor. EXTREMES FOR CURRENT PERIOD.—Water year 1982: Maximum discharge, 98 ftVs (2.78 ra^/s) Mar. 31, gage height, 4.93 ft (1.503 m); maximum gage height, 5.10 ft (1.554 m) Mar. 30; no flow on many days. October to December 1982: Maximum discharge during period, 24 ft 3 /s (0.68 m-Vs) Dec. 3, gage height, 4.01 ft (1.222 m); no flow Oct. 13-22.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP

1 5.1 3.9 3.4 2.8 1.9 .88 92 18 14 2.5 .00 1.6 2 5.0 3.9 3.4 2.8 1.9 .88 87 17 13 2.4 .00 .46 3 5.0 3.9 3.4 2.8 1.9 .88 84 16 12 2.4 .00 .38 4 5.0 3.8 3.3 2.7 1.8 .89 77 15 11 2.4 .00 .28 5 4.9 3.8 3.3 2.7 1.8 .90 71 16 10 2.3 .00 .21 6 4.9 3.8 3-3 2.7 1.8 .91 65 16 9.7 2.2 .00 .12 7 4.8 3.8 3.3 2.7 1.8 .92 59 15 9.1 2.2 .00 .01 8 4.8 3.7 3.3 2.6 1.7 .94 55 14 7.9 2.1 .00 .20 9 4.8 3-7 3.3 2.6 1.7 .96 51 14 7.3 2.1 .00 .41 10 4.7 3.7 3.3 2.6 1.6 .99 47 13 5-9 2.1 .00 .60 11 4.7 3.7 3.3 2.5 1.6 1.0 43 13 5.3 2.1 .00 .78 12 4.6 3.6 3-2 2.5 1.6 1.1 40 13 4.8 2.1 .00 1.0 13 4.6 3.6 3.2 2.5 1.5 1.1 37 15 4.3 2.1 .00 1.2 14 4.6 3.6 3.2 2.5 1.5 1.1 34 15 4.2 2.1 .00 1.4 15 4.5 3.6 3.2 2.4 1.4 1.3 32 16 4.0 2.1 .00 1.6 16 4.5 3-6 3-2 2.4 1.3 1.7 32 18 3-7 2.1 .00 1.6 17 4.4 3-5 3.1 2.4 1.3 2.1 35 20 3.6 2.1 .00 1.5 18 4.4 3-5 3.1 2.4 1.2 2.4 35 23 3.4 2.1 ..00 1.4 19 4.3 3.5 3.1 2.3 1.1 4.5 34 23 3.2 2.1 .00 1.3 20 4.3 3.5 3.1 2.3 1.0 8.0 35 23 3.1 2.1 .00 1.2 21 4.3 3.5 3.1 2.3 .96 12 34 22 3.0 2.1 .00 1.2 22 4.2 3-5 3.0 2.2 .95 17 32 21 2.8 2.1 .00 1.1 23 4.2 3-5 3.0 2.2 .93 23 30 19 2.8 2.1 .00 1.0 24 4.2 3-5 3.0 2.2 .91 31 27 18 3.4 2.1 .00 .94 25 4.1 3.5 3.0 2.1 .90 49 25 17 3.6 2.0 .00 .87

26 4.1 3.5 2.9 2.1 .89 63 33 17 3.3 2.0 .00 .80 27 4.1 3.4 2.9 2.1 .88 69 20 17 3.1 .00 .00 .73 28 4.0 3-4 2.9 2.0 .88 71 19 16 3-0 .00 .00 .66 29 4.0 3.4 2.9 2.0 —— 75 19 16 2.7 .00 .00 .58 30 4.0 3.4 2.9 2.0 —— 78 19 15 2.6 .00 .00 .61 31 4.0 — - 2.8 2.0 —— 92 16 —— .00 .00 —— TOTAL 139.1 108.3 97.4 74.4 38.70 613.45 1303 527 169.8 56.10 .00 25.74 MEAN 4.49 3.61 3.14 2.40 1.38 19.8 43.4 17.0 5.66 1.81 .000 .86 MAX 5.1 3.9 3.4 2.8 1.9 92 92 23 14 2.5 .00 1.6 MIN 4.0 3.4 2.8 2.0 .88 .88 19 13 2.6 .00 .00 .01 AC- FT 276 215 193 148 77 1220 2580 1050 337 111 .00 51 WTR YR 1982 TOTAL 3152.99 MEAN 8.64 MAX 92 MIN .00 AC-FT 6250 MINNESOTA RIVER BASIN i?

444214093273001 SPRING LAKE OUTLET NEAR PRIOR LAKE, MM—Continued DISCHARGE, IN CUBIC PEEP PER SECOND, WATER YEAR OCTOBER 1982 TO SEPTEMBER 1983 MEAN VALUES

DAY OCT MOV DEC JAM FE8 MAR APR MAY JUN JML AUG SEP 1 .63 7.4 lit 2 .66 7.5 11 3 .68 7.9 14 4 .70 7.6 17 5 .63 7.6 16

6 .55 7.2 16 7 .48 7.0 15 8 .40 7.0 9 .31 7-0 10 .23 9.5 11 .16 11 12 .08 14 13 .00 15 14 .00 15 15 .00 16 16 .00 15 17 .00 15 18 .00 15 19 .00 16 20 .00 18 21 .00 19 22 .00 20 23 5.2 19 24 5.7 18 25 6.4 17 26 6.5 16 27 6.6 17 28 7.2 21 29 7.3 19 30 7.2 16 31 6.9 —— TOTAL 64.51 407.7 MEAN 2.08 13.6 MAX 7.3 21 MIN .00 7.0 AC-FT 128 809 172 MINNESOTA RIVER BASIN 445314093260301 BRYANT LAKH: INLET NEAR EDEN PRAIRIE, MN LOCATION.—Lat 44°53'14", Ion? 93°26'03", in SWJNWJ sec. 2, T.116 N., R.22 W., Hennepin County, Hydrologlc Unit 07010206, at culvert on County Road 62, 0.5 mi (0.8 km) upstream of Bryant Lake, near Eden Prairie. DRAINAGE AREA. —1.48 mi 2 (3.83 km 2 ). PERIOD OP RECORD.—October 1981 to November 1982 (no winter records). GAGS.—Water-stage recorder. REMARKS.—Records good except those for periods of no gage-height record, Oct. 1 to Dec. 25, Mar. 28 to Apr. 11, and Sept. 16-21, which are poor. EXTREMES FOR CURRENT PERIOD.—Water year 1982: Maximum discharge, 31 ft 3 /s (0.88 mVs) May 17, gage height, 2.62 ft (0.799 m); no flow on many days. October to November 1982: Maximum discharge during periol, 56 ft^/s (1.59 mVs) Oct. 19, gage height, 2.70 ft (0.823 m); minimum, 0.03 ft3/ s «0.001 m 3 /s) Oct. 1, gage height, 1.87 ft (0.570 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982 MEAN VALUES DAY OCT MOV FES MAR APR MAY JiJN JUL SEP

1 .44 .46 .43 5.2 .25 .14 .02 .01 .93 2 .44 .47 .42 4.1 .20 .09 .02 .01 .03 3 .44 .47 .40 2.6 .14 .06 .02 .00 .02 4 .44 .48 .39 1.7 .19 .04 .01 .00 .01 5 .44 .48 .37 —— 1.1 .32 .03 .01 .00 .02 6 .44 .48 .35 .90 .32 .03 .03 .00 .02 7 .44 .49 .33 .76 .24 .03 .04 .00 .02 8 .44 .49 .32 .67 .17 .02 .02 .00 .02 9 .44 .50 .30 .64 .81 .02 .02 .00 .02 10 .44 .50 .28 .64 .44 .02 .01 .00 2.1 11 .44 .51 .26 .67 .35 .01 .05 .00 .09 12 .44 .52 .25 1.3 1.6 .01 .03 .00 .08 13 .44 .52 .23 .66 1.3 .01 .01 .00 .07 14 .44 .53 .21 .55 1.4 .02 .02 .00 .05 15 .44 .54 .19 .52 .83 .02 .02 .00 .24 16 .44 .54 .18 .80 .87 .02 .01 .00 .22 17 .44 .54 .16 —— 1.2 5.5 .01 .01 .00 .19 18 .44 .54 .14 .62 3-0 .01 .01 .00 .16 19 .44 .54 .12 .53 1.4 .02 .00 .00 .12 20 .44 .54 .11 1.1 .82 .02 .00 .00 .09 21 .44 .54 .10 .81 .52 .02 .01 .00 .06 22 .44 .53 .07 .60 .35 .02 .01 .00 .02 23 .44 .53 .06 .57 .20 .02 .00 .00 .03 24 .44 .52 .03 .'48 .11 .18 .01 .06 .03 25 .44 .51 .01 .39 .09 .08 .02 .04 .03 26 .44 .50 .32 .14 .03 .13 .04 .02 27 .45 .49 .47 .34 .02 .04 .18 .02 28 .45 .48 .34 .52 .18 .02 .02 .02 .02 29 .45 .47 2.2 .44 .20 .02 .01 .26 .11 30 .45 .45 4.7 .34 .35 .02 .01 .05 .06 31 .46 — - 5.5 .54 --- .01 .06 —— TOTAL 13.70 15.16 —— 31.20 23.17 1.D6 .63 .73 4.90 MEAN .44 .51 —— 1.04 .75 .035 .020 .024 .16 MAX .46 .54 5.2 5.5 .M .13 .26 2.1 MIN .44 .45 .32 .09 .01 .00 .00 .01 AC-FT 27 30 62 46 2.1 1.2 1.4 9.7 173 •lIIliMESOrA RI'/SR BASIN 445314093260301 BRYANT LAKE INLET NEAR EDEN PRAIRIE, MM—Continued DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1982 TO SEPTEMBER 1933 MEAN VALUES

DAf OCT NOV DEC JAN FE« MAR APR MAY JUiJ JUL A 00 SEP 1 .04 .10 2 .49 .08 3 .13 —— 4 .05 5 .05 --- 6 .36 _ _ 7 .47 ___ 3 .13 —— 9 .07 ___ 10 .10 —— 11 .07 12 .07 13 .08 _-_ 14 .06 15 .07 —— 16 .06 ___ 17 .06 ___ 18 .06 —— 19 6.6 _-- 20 5.8 —— 21 .23 ___ 22 .14 _ — 23 .08 24 .06 25 .06 --- 26 .06 _ _ 27 .06 28 .06 ___ 29 .03 _^_ 30 .07 31 .06 TOTAL 15.78 —— MEAN .51 ___ MAX 6.6 —— WIN .04 ___ AC-FT 31 —— ' MINNESOTA RIVER BASI^I

445223093250901 BRYANT LAKE OUTLET NEAR EDEN PRAIRIE, MN LOCATION.—Lat 44°52'23", long 93°25'09", in NEJNE4, sec.11, T.116 N., R.22 W., Hennepin County, Hydrologic Unit 07010206, at double culverts on Willow Creek Road, 0.1 mi (0.2 km) downstream of Bryant Lake near Eden Prairie. DRAINAGE AREA.—4.75 mi 2 (12.30 tern 2 ). PERIOD OF RECORD.--October 1981 to September 1982 (no winter records). GAGE.—Water-stage recorder.

REMARKS.—Records good except those for periods of no gage-height record, Oct. 1 to Dec. 22 and Mar. 17 to Mar. 29, rfhich are poor. EXTREMES FOR CURRENT YilAR.—Maximum discharge, 10 ft 3 /s (0.28 mVs) Mar. 31, Apr. 1, gage height, 7.82 ft (2.384 in); no flow on many days.

DISCHARGE, IM CUBIC FEET PER SEOOMD, i/ATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY NOV DEC JAM FE3 MAR APR MAY JUM JUL SEP

1 .30 .17 .06 _ _ 10 1.7 1.6 .04 .00 .00 2 .29 .17 .06 —— 9.6 1.5 1.4 .03 .00 .00 3 .29 .16 .05 9.6 1.4 1.2 .03 .00 .00 4 .28 .16 .05 —— 8.6 1.4 1.0 .02 .00 .00 5 .28 .16 .05 — 7.8 1.5 .81 .01 .00 ,00 6 .28 .15 .0'4 _ _ 7.0 1.5 .65 .02 .00 .00 7 .27 .15 .04 6.3 1.5 .60 .02 .00 .00 8 .27 .14 .OH —— 5.8 1.3 .46 .01 .00 .00 9 .27 .14 .03 5.3 1.5 .43 .00 .00 .00 10 .26 .14 .03 — 4.9 1.5 .34 .02 .00 .00 11 .26 .13 .03 _ _ 4.5 1.5 .25 .02 .00 .00 12 .25 .13 .03 —— 4.2 1.6 .21 .01 .00 .00 13 .25 .12 .02 4.0 2.0 .17 .00 .00 .00 14 .25 .12 .02 —— 3-7 2.2 .16 .00 .00 .00 15 .24 .12 .02 — 3.6 2.2 .17 .00 .00 .00 16 .24 .11 .02 ___ 3.7 2.3 .13 .00 .00 .00 17 .23 .11 .02 1.3 4.0 2.6 .11 .00 .00 .00 18 .23 .10 .01 2.9 3.8 3.6 .09 .00 .00 .00 19 .22 .10 .01 3.9 3.6 3-5 .08 .00 .00 .00 20 .22 .09 .01 4.3 4.0 3.2 .08 .00 .00 .00 21 .22 .09 .01 4.5 3.8 2.8 .07 .00 .00 .00 22 .21 .09 .01 4.6 3.6 2.5 .06 .00 .00 .00 23 .21 .09 —— 4.7 3.4 2.2 .04 .00 .00 .00 24 .20 .08 4.8 3.1 2.0 .09 .00 .00 .00 25 .20 .08 — 5.0 2.8 1.8 .11 .00 .00 .00 26 .20 .08 _ _ 5.3 2.5 1.7 .09 .00 .00 .00 27 .19 .07 —— 5.6 2.3 1.8 .08 .00 .00 .00 28 .19 .07 —— 6.0 2.1 1.7 .07 .00 .00 .00 29 .18 .07 —— 6.4 1.9 1.7 .06 .00 .00 .00 30 .18 .06 —— 8.4 1.8 1.7 .05 .00 .00 .00 31 .18 —— --- 10 — - 1.8 —— .00 .00 —— TOTAL 7-34 3.45 ___ _.__ 141.3 61.2 10.66 .23 .00 .00 MEAN .24 .12 —— 4.71 1.97 .36 .007 .000 .000 MAX .30 .17 _-_ 10 3.6 1.6 .04 .00 .00 MIN .18 .06 —— 1.8 1-3 .04 .00 .00 .00 AC -FT 15 6.8 — —— 280 121 21 .5 .00 .00 175 MINNESOTA RIVER BASIN

05330908 MINNESOTA RIVER AT BTJRNSVILLE, MN LOCATION.—Lat 44°48'41", long 93°15'04", In NEiSEi sec.23, T.27 N., R.20 W., Dakota County, Hydrologlc Unit 07020012, on right bank 8.9 mi (14.3 km) from mouth at Northern States' Black Dog Power Plant. DRAINAGE AREA.—Not determined. PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE: June 1930 to current year. pH: June 1980 to current year. WATER TEMPERATURE: June 1980 to current year. DISSOLVED OXYGEN: June 1980 to current year. INSTRUMENTATION.—Water-quality monitor since June 1930.

REMARKS.—Water is pumped to a monitor that is inside a heated shelter. Extremes are published for years with percent or more daily record. Malfunctions of the monitor resulted in less than 80 percent recorded daily record for the current year. COOPERATION.—Water-quality monitor is operated by the Metropolitan Waste Control Commission, St. Paul, "IN.

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 03G. C) WATER YEAR OCTOBER 1981 TO SEPTEMBER 19B2 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 846 834 837 1030 1010 1020 1060 1040 1050 1140 1130 1140 842 828 836 1020 1010 1020 1070 1050 1060 1130 1080 1110 844 825 834 1030 1020 1020 1100 1020 1070 1080 1050 1060 836 823 829 1030 1020 1030 1100 1080 1090 1030 1050 1060 844 826 836 1040 1030 1030 1110 1090 1100 1080 1050 1060 859 838 847 1050 1040 1040 1130 1050 1120 1050 1030 1040 857 849 854 1040 1030 1040 1140 1120 1130 1120 1040 1080 862 855 859 1030 1030 1030 1130 1120 1130 1120 1110 1120 9 871 859 866 1030 1010 1020 1140 1100 1130 1110 1090 1100 10 889 863 881 1010 996 1000 1180 1130 1170 1110 1090 1100 11 893 887 891 1010 992 1000 1200 1160 1180 1120 1100 1110 12 900 891 894 1020 996 1010 1190 1170 1180 1130 1110 1120 13 912 899 908 1020 1010 1010 1180 1160 1170 1110 1100 1110 14 926 908 920 1020 994 1000 1180 1160 1170 1110 1100 1100 15 931 919 926 1030 1010 1020 1180 1170 1180 1110 1110 1110 16 922 908 917 1020 981 994 1190 1160 1180 1120 1110 1120 17 916 908 911 1000 964 987 1220 1030 1130 1140 1110 1130 18 931 908 916 965 942 956 1060 1020 1140 1140 1100 1120 19 945 933 941 999 831 967 1080 1050 1060 1100 1090 1100 20 953 944 948 988 960 974 1100 1070 1090 1110 1100 1110 21 966 954 961 966 958 962 1120 1090 1100 1120 1100 1110 22 990 972 981 972 958 963 1140 1080 1120 1130 1120 1130 23 990 930 985 970 950 961 1180 1140 1160 1120 1100 1110 24 996 978 987 986 970 978 1200 1160 1170 1120 1100 1110 25 1040 1000 1010 1010 976 991 1200 1190 1190 1120 1100 1110 26 1060 1040 1040 1030 1010 1020 1200 1190 1190 1110 1090 1090 27 1070 1050 1060 1030 1000 1020 1180 1160 1170 1100 1080 1080 28 1080 1070 1070 1020 1010 1010 1160 1140 1150 1080 1060 1070 29 1070 1050 1060 1050 1020 1030 1140 1130 1130 1060 1040 1050 30 1060 1040 1050 1060 1040 1050 1140 1130 1130 1060 1040 1040 31 1050 1020 1030 1140 1130 1140 1060 1050 1060 MONTH 1080 823 932 1060 831 1010 1220 1020 1130 1140 1030 1100 176 MINNESOTA RIVER BASIN 05330908 MINNESOTA RIVER AT BURNSVILLE, MN—Continued SPECIFIC CONDUCTANCPi; (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX WIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1050 1030 1040 1060 1020 1040 694 664 680 1040 1030 1030 1020 956 992 698 676 689 1030 1020 1020 954 862 901 728 696 717 1020 1000 1010 876 860 864 730 718 724 1000 986 993 872 583 697 726 718 721 6 1020 992 1000 604 560 584 726 720 723 7 1020 1010 1020 583 571 577 716 706 709 8 1020 1010 1010 598 572 584 716 704 709 9 1030 1020 1020 651 603 628 712 702 707 10 1030 1020 1030 728 676 702 738 714 725 11 1030 1020 1030 981 753 875 760 738 747 12 1020 1010 1010 842 782 801 786 762 773 13 1020 1010 1020 864 838 849 814 786 802 14 1020 1000 1010 876 850 867 824 816 820 15 1020 1010 1020 860 730 814 846 822 832 16 1020 1010 1020 732 562 638 846 832 838 17 1020 1000 1010 564 504 532 860 846 854 18 1020 990 1010 506 490 498 864 860 863 19 1040 988 1020 426 396 406 20 1090 1040 1050 412 392 404 21 1090 1060 1080 390 380 385 22 1090 1070 1080 418 390 405 23 1080 1070 1070 422 302 410 24 1070 1050 1060 436 420 431 25 1100 1070 1080 498 436 466 26 1060 1030 1050 536 498 516 27 1050 1030 1040 580 536 557 28 1070 1040 1060 620 582 600 29 650 620 634 30 670 650 658 31 686 670 677 MONTH 1100 1030 1060 302 645

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 884 887 754 724 734 770 734 752 758 724 733 834 766 777 768 738 753 738 692 719 816 698 752 9 916 824 880 10 980 906 947 11 944 930 937 12 968 930 944 13 936 876 903 14 890 876 882 15 922 870 894 16 856 808 832 17 842 804 817 18 872 838 862 19 864 836 853 20 942 856 897 21 998 942 975 22 1000 990 997 23 1010 1000 1010 24 1020 928 953 25 962 936 954 26 974 962 27 974 942 961 28 980 952 963 29 964 918 941 30 918 892 907 31 177

05330908 MINNESOTA RIVER AT BURNSVILLE, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 8.1 8.0 8.1 7.8 7.7 7.8 7.9 7.8 7.8 7.6 7.5 7.5 3.3 8.1 8.1 7.8 7.8 7.8 7.9 7.8 7.9 7.5 7.1 7.5 8.2 8.1 8.2 7.8 7.8 7.8 7-9 7.8 7.9 7.5 7.1 7.5 8.2 8.1 8.1 7.8 7.8 7.8 7.9 7.9 7.9 7.5 7.1 7.1 8.1 8.1 8.1 7.8 7.7 7.7 7.9 7.9 7.9 7.5 7.1 7.1 8.2 8.1 8.1 7.8 7.7 7.8 7.9 7.8 7.8 7.4 7.1 7.1 8.3 8.2 8.2 7.8 7.8 7.8 7.8 7.8 7.8 7.6 7.1 7.5 8.3 8.1 8.1 7.9 7-8 7.8 7.8 7.8 7.8 7.6 7.6 7-6 8.2 8.0 8.2 7.8 7.8 7.8 7.9 7.8 7.8 7.6 7.6 7.6 10 8.1 8.0 8.0 7.8 7.8 7.8 7.9 7.8 7.9 7.6 7.5 7.6 11 8.1 8.0 8.1 7.9 7.8 7.8 8.0 7.9 7.9 7.5 7.1 7.1 12 8.1 8.0 8.0 7.9 7.8 7.8 7.9 7.9 7.9 7.5 7.5 7.5 13 8.0 7.9 8.0 7.8 7.8 7.8 7.9 7.8 7.8 7.5 7.5 7.5 14 8.0 7-9 7.9 7.3 7.8 7.8 7.8 7.8 7-8 7.6 7.5 7.5 15 8.1 7.9 7.8 7.8 7.7 7.8 7.8 7.8 7.8 7.6 7.6 7.6 16 8.1 8.0 7.7 7.8 7.7 7-7 7.8 7.8 7.8 7.6 7.6 7.6 17 8.0 8.0 7.8 7.8 7.7 7.8 7.8 7.8 7.8 7.6 7.5 .7.6 18 3.1 8.0 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.6 7.6 7.6 19 8.1 8.1 7.8 7.9 6.9 7.8 7.8 7-7 7.8 7.6 7.6 7.6 20 8.1 8.1 7.9 8.0 7.7 7.9 7.8 7-7 7.7 7.6 7.6 7.6 21 8.2 8.1 7.9 8.0 7.9 7-9 7.7 7.6 7.7 7.7 7.5 7.6 22 8.2 8.0 8.0 8.0 7.9 8.0 7.7 7.6 7.6 7.7 7.6 7.7 23 8.3 8.0 7.9 8.0 7.9 7.9 7.6 7.6 7.6 7.7 7.6 7.6 21 8.3 8.3 7.9 8.0 7.9 7-9 7.6 7.5 7.6 7.7 7.6 7.7 25 8.4 8.3 7.9 7-9 7-9 7.9 7.6 7.5 7.5 7.6 7.6 7.6 26 8.4 8.4 7.8 7.9 7.8 7.8 7.6 7.5 7.5 7.6 7.6 7.6 27 8.4 8.3 7.8 7.9 7.8 7.8 7.5 7.1 7.1 7-7 7.6 7.6 28 8.3 8.3 7.8 7-9 7.8 7.3 7.4 7.4 7.4 7.7 7.6 7.7 29 8.3 7.9 7.8 7.8 7.8 7.8 7.6 7.3 7-1 7.7 7.6 7.6 30 7.9 7.8 7.8 7.9 7.8 7.3 7.6 7.5 7.6 7.7 7.7 7.7 31 7.8 7.7 7.7 7.6 7-5 7.6 7.7 7.6 7.6 MONTH 8.4 7-7 8.0 6.9 7-8 8.0 7-3 7.7 7.7 7.1 7.6

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 7.7 7.6 7.6 7-9 7.9 7.9 8.0 7.9 8.0 7.7 7.6 7.6 7.9 7.9 7-9 8.0 8.0 8.0 7.7 7.6 7.7 7.9 7.9 7.9 8.0 8.0 8.0 7.6 7.6 7-6 7.9 7.9 7.9 8.1 8.0 8.1 7.6 7.6 7.6 8.0 7.9 7.9 8.1 8.1 8.1 6 7.6 7-5 7.6 8.0 7.9 7.9 8.1 8.1 8.1 7 7.6 7.6 7.6 8.0 7.9 7.9 8.1 8.1 8.1 8 7.6 7.6 7.6 8.0 7.9 7.9 8.1 8.1 8.1 9 7.7 7.6 7.6 8.0 7.9 7.9 8.1 8.1 8.1 10 7.6 7.6 7.6 7.9 7.9 7.9 8.1 8.1 8.1 11 7.6 7.6 7.6 7.9 7.9 7.9 8.1 8.0 8.1 12 7-7 7.6 7-6 7-9 7.8 7.8 8.1 8.0 8.1 13 7.7 7.6 7.7 7.8 7.8 7.8 8.0 8.0 8.0 14 7.7 7.6 7.7 7.8 7.8 7.8 8.1 8.0 8.1 15 7.7 7.7 7.7 7.8 7.8 7.8 8.0 8.0 8.0 16 7.7 7.7 7.7 7.8 7.8 7.8 8.0 8.0 8.0 17 7.7 7.6 7.7 7-8 7-8 7.8 8.0 7.9 8.0 18 7-7 7.6 7.6 7.9 7.8 7-9 8.0 7-9 8.0 19 7.7 7.7 7.7 7-9 7.8 7.9 20 7-7 7-7 7.7 7.9 7.8 7-9 21 7.7 7.7 7.7 7.9 7.8 22 7.7 7-7 7.7 7.9 7.9 23 7.8 7-7 7.7 7.9 7.9 24 7.8 7.7 7.8 7.9 7.8 25 7.8 7.8 7.8 7.9 7.9 26 7.8 7.8 7.8 7.9 7.9 7.9 27 7.8 7.8 7.8 7.9 7.9 7.9 28 7.9 7.8 7.8 7.9 7.9 7.9 29 7.9 7.9 7.9 30 7.9 7.9 7.9 31 8.0 7.9 7.9 MONTH 7.9 7.5 7.7 7-9 MINNESOTA RIVER BASIN 05330908 MINNESOTA RIVER AT BURNSVILLE, MN- -Continued PH (STANDARD UNITS), WATER YE4R OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER —— 8.1 8.0 8.1 —— —— —— 8.2 8.2 8.2 3 8.3 8.2 8.2 4 8.4 8.1 8.2 5 8.1 8.2 8.3 8.2 8.3 6 8.2 8.1 8.2 8.3 8.1 8.2 7 8.3 8.1 8.2 8.4 8.2 8.3 8 8.2 8.2 8.2 8.2 7.9 8.1 9 8.2 8.? 8.2 8.1 7.9 8.0 10 8.2 8.1 8.2 8.1 7.9 8.0 11 8.2 8.1 8.2 8.1 7.9 8.0 12 8.3 8.2 8.2 8.0 7.9 7.9 13 8.3 8.2 8.3 7.9 7.8 7.8 14 8.? 8.2 8.2 7.8 7.7 7.8 15 8.3 8.1 8.2 7.8 7.7 7-8 16 8.2 8.2 8.2 7-9 7.7 7.8 17 8.2 8.1 8.1 8.1 7.9 8.0 18 8.? 8.1 8.1 8.? 8.0 ' 8.2 19 8.2 7-9 8.0 8.2 8.0 8.1 20 8.1 7.9 8.0 8.0 8.0 8.0 21 8.0 7.9 7.9 8.0 8.0 8.0 22 8.0 7.8 7.9 8.1 8.0 8.1 23 7-9 7.7 7.8 8.1 8.1 8.1 24 8.0 7.8 7.8 25 7.9 7-7 7.8 26 8.0 8.0 8.0 7.7 7-8 27 8.0 8.0 8.0 7.9 8.0 28 8.0 8.1 8.1 7.8 8.0 29 8.0 8.1 8.0 8.0 30 8.1 8.0 8.1 7.9 8.0 31 8.0 7.9 8.0

WATER (DKG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 14.5 14.0 14.5 7.5 7.0 7.0 3.5 3.0 3.0 .5 .5 .5 2 13-5 13.0 13.5 7.5 7.0 7.0 3.0 3.0 3.0 .5 .5 .5 3 13-5 12.5 13.0 7.5 7.0 7-0 3.5 1.5 2.5 .5 .5 .5 4 12.5 12.0 12.0 7.5 7.0 7.5 1.5 1.0 1.5 .5 .5 .5 5 12.0 12.0 12.0 7.5 7.5 7.5 1.5 1.0 1.0 .5 .5 .5 6 12.0 11.5 11.5 7-5 7.0 7-5 3.0 1.0 1.5 .5 .5 .5 7 11.5 11.0 11.0 7.5 7.0 7-0 1.5 1.5 1.5 .5 .5 .5 8 11.0 11.0 11.0 7.5 7.0 7.0 1.5 1.5 1.5 .5 .5 .5 9 11.0 11.0 11.0 7.0 6.5 7-0 1.5 1.0 1.5 .5 .5 .5 10 11.0 11.0 11.0 7.0 6.5 6.5 1.5 .5 1.0 .5 .5 .5 11 11.5 11.0 11.0 6.5 6.0 6.5 1.0 .5 1.0 .5 .5 .5 12 11.5 11.0 11.5 6.0 6.0 6.0 1.0 1.0 1.0 1.0 .5 .5 13 11.5 11.5 11.5 6.0 6.0 6.0 1.0 1.0 1.0 1.0 .5 .5 14 12.0 11.5 11.5 6.5 6.0 6.0 1.0 1.0 1.0 .5 .5 .5 15 11.5 11.0 11.5 6.5 6.5 6.5 1.0 1.0 .5 .5 .5 16 11.5 11.5 11.5 7.0 6.0 6.5 1.0 .5 .5 .5 17 11.5 11.5 11.5 6.5 6.5 6.5 .5 .5 .5 .5 18 11.5 10.5 11.0 6.5 6.0 6.5 .5 1.0 .5 .5 19 10.5 10.0 10.0 7.5 5.0 5.5 .5 .5 .5 .5 20 9-5 9.5 9.5 6.5 4.0 4.5 1.0 1.0 .5 .5 .5 21 9-5 9.0 9-0 4.0 4.0 4.0 1.0 .5 .0 .5 .5 .5 22 9-0 8.0 8.5 3.5 3.5 3.5 1.0 .5 .0 .5 .5 .5 23 8.0 7.5 7.5 3.5 3.0 3-5 .5 .5 .5 1.0 .5 .5 24 7-0 7.0 6.0 4.5 3.5 3.5 1.0 .5 .5 .5 .5 .5 25 6.0 6.0 6.0 3.5 3.5 3.5 .5 .5 .5 .5 .5 .5 26 6.0 5.5 6.0 3.5 3.5 3.5 .5 .5 .5 .5 .5 27 6.0 5.5 5.5 3.5 3.5 3.5 .5 .5 .5; .5 .5 .5 28 6.0 5.5 6.0 3.5 3.5 3.5 .5 .5 .5 .5 .5 .5 29 6.0 6.0 6.5 3.5 3.5 3.5 .5 .5 .5 .5 .5 .5 30 6.5 6.0 6.5 3.5 3.5 3.5 .5 .5 .9 .5 .5 .5 31 7.5 7.0 7.0 .5 .5 .5; .5 .5 .5 MONTH 14.5 5.5 10.0 7.5 3.0 5.5 3.5 l. 1.0 179 MINNESOTA RIVER BASIN 05330908 MINNESOTA RIVER AT BURNSVILLE, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 .5 .5 .5 1.0 1.0 1.0 5.0 3.0 1.5 2 .5 .5 .5 1.0 1.0 1.0 5.0 5.0 5.0 3 .5 .5 .5 1.0 1.0 1.0 5.5 5.0 5.0 1 .5 .5 .5 1.0 1.0 1.0 5.0 1.5 1.5 5 .5 .5 .5 1.0 1.0 1.0 1.5 1.0 1.0 6 .5 .5 .5 1.0 1.0 1.0 1.0 3.5 1.0 7 .5 .5 .5 1.0 1.0 1.0 3.0 3-0 3.0 8 .5 .5 .5 1.0' .5 1.0 3.0 3.0 3.0 9 .5 .5 .5 1.0 .5 1.0 3.5 3.0 3.0 10 .5 .5 .5 1.0 1.0 1.0 3.5 3.5 3.5 11 .5 .5 .5 1.0 1.0 1.0 3-5 3.5 3-5 12 .5 .5 .5 1.0 1.0 1.0 5.5 1.0 1.5 13 .5 .5 .5 1.5 1.0 1.0 6.5 1.5 5.0 11 .5 .5 .5 1.5 1.0 ' 1.0 5.5 6.0 6.0 15 .5 .5 .5 1.0 1.0 1.0 7.5 6.5 7.0 16 1.0 .5 .5 1.0 1.0 1.0 8.0 7-5 7-5 17 1.0 .5 1.0 1.5 1.0 1.5 8.5 8.0 8.0 18 1.0 1.0 1.0 1.5 1.0 1.5 8.5 8.5 8.5 19 1.0 1.0 1.0 1.0 1.0 1.0 —— —— —— 20 1.0 1.0 1.0 1.0 1.0 1.0 —— —— —— 21 1.5 1.0 1.0 1.0 1.0 1.0 —— —— —— 22 1.5 1.5 1.5 1.0 1.0 1.0 —— —— —— 23 1.5 1.0 1.0 5.0 1.0 1.5 21 1.0 1.0 1.0 1.5 1.0 1.5 —— —— —— 25 1.0 1.0 1.0 2.0 1.5 1.5 —— —— —— 26 1.0 1.0 1.0 2.0 1.5 1.5 —— —— —— 27 1.0 1.0 1.0 2.0 1.5 1.5 28 1.0 1.0 1.0 2.0 1.5 2.0 —— —— —— 29 —— —— —— 2.5 2.0 2.5 30 —— —— —— 3.0 2.5 2.5 —— —— —— 31 —— —— —— 3.5 3.0 3.0

MONTH 1.5 .5 .5 5.0 .5 1.5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN ' MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 —— —— —— 21.5 21.0 20.0 —— —— —— —— —— —— 2 —— —— —— —— —— —— —— —— —— 20.0 20.0 20.0 3 —— —— —— —— —— —— —— —— —— 20.5 20.0 20.0 1 —— —— —— —— —— —— —— —— —— 20.5 19.5 20.0 5 —— —— —— —— —— —— 26.0 25.5 25.5 20.5 20.0 20.0 6 —— —— —— —— —— —— 26.0 25.5 25.5 20.0 19.5 20.0 7 —— —— —— —— —— —— 26.0 25.5 25.5 20.0 19-5 19-5 8 —— —— —— —— —— —— 25.5 25.0 25.0 19.5 19.0 19-5 9 —— —— —— —— —— —— 21.5 21.0 21.0 19.5 18.5 19.0 10 —— —— —— —— —— —— 21.0 23.5 23.5 18.5 18.0 18.5 11 —— —— —— —— —— —— 21.0 23.0 23.5 19.5 18.5 19.0 12 —— —— —— —— —— —— 25.5 21.0 22.5 19.0 18.5 18.5 13 —— —— —— —— —— —— 21.0 20.5 20.5 18.5 18.0 18.5 11 —— —— —— —— —— —— 21.0 20.5 21.0 17.5 16.5 17.0 15 —— —— —— —— —— —— 21.5 20.5 21.0 16.0 15.5 16.0 16 —— —— —— —— —— —— 23.0 21.0 21.5 15.5 15.0 15.0 17 —— —— —— —— —— —— 22.5 20.5 21.5 15.0 15.0 15.0 18 —— —— —— —— —— —— 22.5 21.5 22.0 15.0 11.5 15.0 19 —— —— —— —— —— —— 25.0 22.0 23.5 15.0 11.5 11.5 20 —— —— —— —— —— —— 25.0 21.5 21.5 11.5 11.5 H«5 21 —— —— —— —— —— —— 25.0 21.0 21.5 H.5 11.0 11.5 22 —— —— —— —— —— —— 25.0 21.5 21.5 11.5 11.0 11.5 23 —— —— —— —— —— —— 21.5 21.0 21.5 H.5 11.0 11.5 21 19.5 19.0 19-5 —— —— —— 21.5 23.5 21.0 25 20.0 19.0 19.5 —— —— —— 21.0 23.0 23.5 —— —— —— 26 20.0 19.5 19.5 —— —— —— 23-5 22.5 23.0 27 21.0 20.0 20.5 —— —— —— 22.5 22.0 22.0 —— —— —— 28 21.0 20.5 20.5 —— —— —— 21.0 21.5 22.0 —— —— —— 29 21.5 21.0 21.0 —— —— —— 21.5 21.5 21.5 30 21.5 21.0 21.0 —— —— —— 22.5 21.0 21.5 —— —— —— 31 —— —— —— —— —— —— 22.0 21.0 21.5 —— —— —— 180 MINNESOTA RIVER BASIN 05330908 MINNESOTA RIVER AT BURNSVILLE, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 13.5 10.7 12.0 13.1 11.4 12.4 13.6 12.4 13.0 12.3 10.5 11.3 2 15.4 11.7 13.0 13.3 11.8 12.5 13.3 12.4 12.9 10.5 . 9.5 10.0 3 14.3 13.3 13.8 13.5 11.7 12.5 13.5 12.3 12.8 10.4 9.4 9.9 4 15.3 12.9 13.9 13.5 12.4 12.9 13.2 12.5 12.8 10.2 9.9 10.0 5 13.7 11.8 12.6 13.3 11.5 12.4 13.2 12.6 12.9 10.3 9-7 10.0 6 13.8 11.2 12.3 12.6 11.1 12.0 13.5 12.4 12.8 9.7 9.3 9.6 7 15.4 12.0 13.6 12.4 11.0 11.7 12.5 11.9 12.1 11.3 9.3 10.1 8 14.9 12.5 13.8 12.6, 10.9 11.7 12.3 12.0 12.1 10.5 9.7 10.2 9 14.0 11.4 12.5 14.9 11.2 13.2 13.9 12.0 12.2 10.2 9.3 9.7 10 11.9 10.4 11.3 15.0 10.8 14.0 14.4 13.2 14.2 11.6 10.2 10.7 11 11.9 10.4 11.2 15.0 13.2 14.0 14.4 13.5 13.9 11.1 10.4 10.7 12 11.5 9.9 10.7 15.0 13.8 14.6 13.8 12.9 13.4 10.7 10.0 10.4 13 10.6 9-3 9.8 15.9 13.9 14.7 12.8 12.0 12.3 10.0 9.5 9.7 14 9.3 8.1 8.8 15.9 13.8 14.6 12.1 11.7 11.9 11.0 9-4 10.2 15 13.2 8.2 10.6 14.3 13.1 13.8 12.3 11.6 11.9 10.7 10.2 10.5 16 14.2 11.7 12.7 15.3 12.3 12.8 12.2 11.8 12.0 10.7 10.2 10.4 17 12.7 9.8 11.3 13.7 11.9 12.7 13.7 12.0 13.0 11.3 10.4 10.9 18 9.8 8.1 8.9 13.3 12.1 12.8 14.3 13.8 14.0 11.6 10.3 10.8 19 10.9 8.7 9.5 15.2 11.5 13.2 14.3 13.5 14.0 11.3 9.9 10.3 20 11.1 9.4 10.1 15.7 13.0 14.3 13.7 12.6 13.2 10.1 9.7 9.9 21 11.3 10.0 10.5 15.8 13.8 14.3 12.7 11.3 11.9 10.4 9.8 10.1 22 12.3 10.2 11.7 15-1 13.9 14.5 14.4 11.4 12.9 10.3 9.9 10.1 23 12.1 11.1 11.7 14.6 14.1 14.4 15.0 11.5 14.7 11.8 9-7 10.1 24 12.1 11.3 11.7 14.5 13.3 14.0 13.7 10.1 13.2 12.2 9.1 10.1 25 13.2 11.7 12.3 14.6 13.2 14.0 13.0 9.7 12.8 10.8 9.5 9.8 26 14.3 12.5 13.1 14.4 13.4 13.8 14.4 9.2 12.7 10.7 9.6 10.1 27 14.4 13.1 13.7 14.4 13.3 13.7 12.7 8.9 12.5 11.2 9.3 10.0 28 14.2 13.4 13.8 14.5 13.0 13.7 12.6 8.5 12.5 9.7 8.2 8.9 29 14.2 12.8 13.5 14.5 13.0 13.4 12.9 8.4 9.6 10.8 8.6 9.7 30 14.3 12.3 13.5 14.0 12.8 13.3 10.9 9.5 10.3 9-9 8.5 9.2 31 13.2 11.3 12.4 11.8 9.1 10.7 9.3 8.3 8.8 MONTH 15.4 (.1 12.0 15.9 13.4 15.0 8.4 12.6 12.3 8.2 10.1

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 10.8 7.9 8.5 10.7 9.8 10.1 2 10.1 8.6 8.9 11.1 9.9 10.5 3 9.5 7.6 8.4 11.3 10.5 10.9 4 9.1 7.9 8.4 11.5 10.9 11.1 5 9.2 8.1 8.5 11.6 10.6 11.1 6 8.5 7.5 8.0 12.7 11.3 12.1 7 10.4 7.1 8.9 12.5 11.9 12.2 8 8.1 6.6 6.9 12.3 10.6 11.5 9 8.2 6.2 7.2 11.2 10.3 10.7 13.4 12.8 13.0 10 8.2 6.3 7.0 13.9 10.8 12.7 13.3 12.3 12.6 11 7.6 6.8 7.2 12.3 10.9 11.8 13.8 12.0 12.5 12 9-8 6.3 8.1 10.6 9.6 10.1 12.4 11.8 12.1 13 9.0 8.2 8.6 10.2 9.6 9.9 12.6 11.0 11.7 14 9.2 7.7 8.5 10.0 9-3 9.7 11.9 10.5 11.2 15 8.4 7.0 7.5 9.9 9.4 9.6 12.2 10.3 11.4 16 9.6 5.9 7.4 9.7 9.2 9-X 11.9 10.2 11.1 17 7.8 6.0 6.6 10.1 9.3 9.7 11.2 9.7 10.3 18 7.3 5.6 6.5 10.7 9.2 10.0 9.9 9-4 9.6 19 7.9 6.0 6.9 11.4 9.6 10.4 20 8.2 6.2 7.2 12.0 10.3 10.9 21 6.9 6.3 6.6 11.5 10.7 11.1 22 8.1 6.7 7.3 12.3 11.3 11.7 23 8.0 7.3 7.6 12.8 11.3 11.7 24 9.3 7.1 7.9 12.2 11.1 11.7 25 10.3 7.4 8.9 11.8 10.8 11.3 26 9.7 8.7 9.2 12.1 11.1 11.6 27 9.7 8.8 9.3 12.9 11.3 12.1 28 10.4 9.2 9.8 13.2 12.6 12.9 29 —— —— —— 12.9 11.9 12.5 30 —— —— —— 12.3 11.4 11.9 31 —— —— —— 12.0 11.4 11.7 MONTH 10.8 5.6 7.9 13.9 9.2 11.1 MINNESOTA RIVER BASIN 181 05330908 MINNESOTA RIVER AT BURNSVILLE, MN—Continued OXYGEN, DISSOLVED (DO), MO/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 8.4 7.9 8.1 2 8.8 8.0 8.3 3 io".o 7.1 8.3 4 10.9 7-3 8.9 5 10.0 8.2 9.1 6 10.4 7.6 9.0 7 11.0 9.0 9.9 8 11.6 8.6 9.6 9 9.7 8.5 9.1 10 10.0 8.0 9.2 11 11.4 8.9 9.7 12 10.5 9.2 9.5 13 10.1 8.3 9.1 14 8.1 6.8 7.3 15 8.1 6.5 7.4 16 9.4 7.3 8.4 17 11.0 8.5 9.6 18 12.8 10.2 11.2 19 11.9 9.5 10.6 20 9.7 8.6 9.1 21 9.9 8.9 9.3 22 10.7 9.2 9.8 23 10.2 9.7 9.9 24 10.0 7.6 8.2 25 8.4 7.9 8.1 26 8.6 7.7 8.2 27 8.5 7.7 8.1 28 9.0 7.9 8.4 29 8.6 7.8 8.1 30 8.7 7.8 8.2 31 182 MINNESOTA RIVER BASIN 05330920 MINNESOTA RIVER AT PORT SNELLING STATE PARK, ST. PAUL, MN LOCATION.—Lat 44°52'13", long 93°11'32", in NEJSEJ sec.32, T.28 N., R.23 W., Hennepin County, Hydrologic Unit 07020012, on left bank 3 mi (5 km) upstream from mouth. DRAINAGE AREA.—16,900 mi 2 (43,800 km 2 ). PERIOD OP RECORD.—Water years 1973 to current year. PERIOD OP DAILY RECORD.~ SPECIPIC CONDUCTANCE: October 1978 to current year. pH: October 1978 to current year. WATER TEMPERATURE: October 1978 to current year. DISSOLVED OXYGEN: October 1978 to current year. INSTRUMENTATION.—Water-quality monitor since October 1978. REMARKS.—Water discharge estimated on the basis of discharge for Minnesota River near Jordan (station 05330000) adjusted for travel time. Water is pumped to a monitor that is inside a heated shelter; therefore, water temperature during the winter period may be affected. Extremes are published for years with 80 percent or more daily record. COOPERATION.—Samples collected and water-quality monitor operated by the Metropolitan Waste Control Commission, St. Paul, MN. EXTREMES FOR PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE (water years 1980-82): Maximum, 1,320 micromhos Dec. 21, 1981; minimum, 220 micromhos Mar. 26, 1980. pH (water years 1980-81): Maximum, 8.5 units Jan. 1, 3, Feb. 27, 1980; minimum, 7.1 units Jan. 28-29, 1980. WATER TEMPERATURES (water years 1980-82): Maximum, 27.0°C July 14-15, 1980, July 10, 1981; minimum, 0.5°C many days during winter. DISSOLVED OXYGEN (water years 1980-81): Maximum, 17-7 mg/L May 12, 1980; minimum, 3-3 mg/L July 31, 1980. EXTREMES FOR CURRENT YEAR.— SPECIFIC CONDUCTANCE: Maximum, 1,320 micromhos Dec. 21; minimum, 352 micromhos Aug. 17. WATER TEMPERATURES: Maximum, 26.05 C August 4, 5, 6, 7; minimum, 0.5°C many days during winter.

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C) WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 866 856 861 1060 1060 1060 1200 1180 1190 2 865 850 856 1060 1060 1060 1180 1160 1170 3 859 837 850 1080 1060 1070 1170 1120 1150 4 851 825 841 1090 1070 1080 1120 1100 1110 5 851 781 844 1100 1080 1090 1120 1100 1110 6 865 840 851 1060 1040 1050 1100 1080 1090 1110 1080 1090 7 862 848 855 1050 1040 1050 1150 1110 1130 1100 1080 1090 8 866 857 861 1050 1030 1040 1140 1110 1120 1100 1080 1090 9 883 862 870 1090 1030 1060 1150 1130 1140 1100 1080 1090 10 896 877 883 1080 1060 1070 1170 1160 1170 1090 1070 1080 11 902 895 898 1070 1050 1060 1090 1080 1090 12 907 900 902 1080 1050 1060 1100 1080 1090 13 918 895 910 1070 1060 1070 1100 1070 1080 14 919 893 907 1070 1050 1060 1080 1070 1080 15 935 915 926 1080 1060 1070 1180 1170 1170 1080 1060 1070 16 935 920 927 1070 1050 1060 1190 1170 1180 1090 1080 1080 17 920 887 909 1050 1010 1050 1210 1180 1190 1110 1070 1090 18 921 915 917 1010 920 990 1230 1200 1210 1100 1080 1090 19 944 919 935 992 966 978 1260 1220 1240 1110 1080 1100 20 954 945 949 1270 1240 1250 1080 1040 1060 21 965 945 957 1320 1250 1280 1130 1040 1090 22 981 965 972 1290 1260 1270 1130 1110 1120 23 989 982 986 1260 1230 1240 1130 1110 1120 24 989 985 987 1270 1240 1250 1130 1100 1110 25 996 989 992 1280 1250 1260 1130 1100 1120 26 ______1280 1260 1270 1140 1110 1130 27 —— —— —— 1270 1240 1250 1120 1090 1110 28 —— —— —— 1230 1210 1220 1100 1050 1080 29 —— —— —— 1200 1180 1190 1070 1050 1060 30 —— —— —— 1190 1180 1190 1060 1030 1040 31 —— —— —— 1190 1180 1190 1070 1030 1060 MONTH 1200 1030 1100 MINNESOTA RIVER BASIN 183 05330920 MINNESOTA RIVER AT PORT SMELLING STATE PARK AT ST. PAUL, MN--Continued SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 1090 1050 1070 1050 1030 1040 676 656 666 2 1090 1050 1070 1040 994 1010 710 678 692 3 1050 1010 1030 998 892 941 746 710 728 4 1050 1010 1030 950 848 941 748 726 743 5 1040 1010 1020 946 654 819 750 740 743 6 1030 986 1010 648 530 565 758 750 753 7 1020 988 1000 526 482 502 8 1060 1000 1030 510 472 495 9 1050 1020 1030 510 472 489 10 1060 1020 1040 600 510 543 11 1060 1030 1040 822 560 690 12 1060 1010 1030 842 682 795 13 1020 1000 1010 836 750 814 14 1030 1010 1020 846 792 832 15 1030 1010 1020 842 756 810 16 1070 1010 1040 748 610 675 17 1100 996 1030 598 472 525 18 1020 992 1010 468 400 438 19 1100 1010 1050 410 374 389 20 1140 1050 1080 425 379 402 21 1090 1050 1070 442 404 415 22 1090 1070 1080 479 437 452 23 1090 1040 1060 542 382 476 24 1090 1050 1060 544 522 529 25 1070 1060 1060 572 532 545 26 1070 1050 1060 598 566 582 27 1060 1020 1040 634 592 612 28 1060 1020 1040 672 636 654 29 —— —— —— 702 674 688 30 —— —— —— 760 628 678 31 —— —— —— 654 640 647 MONTH 1140 986 1040 1050 374 647

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 910 434 874 1080 1040 1060 810 658 800 2 874 820 853 1100 1070 1080 864 716 780 3 872 852 861 1110 1090 1100 764 698 718 4 866 848 861 1110 1100 1100 758 684 710 5 846 826 838 1120 1060 1080 750 612 700 6 830 778 805 1090 1070 1080 810 722 746 7 842 774 805 1100 1060 1080 722 692 704 8 840 826 834 1040 1010 1020 736 668 686 9 834 782 812 1000 946 970 912 734 822 10 780 684 736 926 844 871 992 894 932 11 756 720 743 818 722 770 1000 962 984 12 752 694 723 756 722 732 998 962 976 13 726 534 652 776 748 755 1010 986 996 14 550 434 497 810 776 793 986 950 964 15 614 552 574 824 802 814 1000 930 962 16 706 620 674 830 542 796 1010 844 924 17 760 706 730 872 352 827 842 788 832 18 792 760 777 910 892 901 892 844 872 19 808 790 797 918 830 864 888 864 878 20 874 810 836 916 878 896 930 862 890 21 934 876 905 890 846 865 1010 936 970 22 942 668 780 860 818 840 1020 1010 1020 23 652 620 634 844 794 821 1050 1020 1040 24 778 690 729 870 822 844 1080 1050 1060 25 886 782 839 918 834 872 1090 1060 1080 26 956 894 923 892 804 836 1090 1070 1080 27 950 800 865 944 816 856 1090 1060 1080 28 946 904 919 924 626 868 1070 1030 1050 29 930 908 918 836 810 826 1040 970 1010 30 980 930 950 880 822 844 1000 968 986 31 1040 986 1010 844 790 828 MONTH 1040 434 799 1120 352 899 1090 612 908 184 MINNESOTA RIVER BASIN 05330920 MINNESOTA RIVER AT PORT SNELLING STATE PARK AT ST. PAUL, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 1 8.1 1 8.1 8.2 8.2 8.2 7.9 7.9 7.9 2 1 8.1 1 8.1 8.2 8.1 8.2 7.9 7.9 7.9 3 1 8.1 1 8.1 8.2 8.2 8.2 7.9 7.9 7.9 4 1 8.1 1 8.1 8.2 8.2 8.2 7.9 7.9 7.9 5 1 8.1 1 8.1 8.2 8.2 8.2 7.9 7.7 7.8 6 1 8.1 1 8.1 8.2 8.2 8.2 7.7 7.7 7.7 7 1 8.1 1 8.1 8.2 8.2 8.2 7.7 7.7 7.7 8 1 8.1 1 8.1 8.2 8.2 8.2 7.7 7.7 7.7 9 1 8.1 1 8.1 8.2 8.2 8.2 7.7 7.7 7.7 10 1 8.1 1 8.1 8.2 8.2 8.2 7.7 7.7 7.7 11 1 8.1 1 8.1 7.7 7.7 7.7 12 1 8.1 1 8.1 7.7 7.7 7.7 13 1 8.1 1 8.1 7.7 7.7 7.7 14 1 8.1 1 8.1 7.7 7.7 7.7 15 1 8.1 1 8.1 1.2 7.9 8.1 7.7 7.7 7.7 16 1 8.1 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 17 1 8.1 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 18 1 8.1 1 8.1 7-9 7.9 7.9 7.7 7.7 7.7 19 1 8.1 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 20 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 21 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 22 1 8.1 7-9 7.9 7.9 7.7 7.7 7.7 23 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 24 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 25 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 26 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 27 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 28 1 8.1 8.0 7.9 7.9 7.7 7.7 7.7 29 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 30 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 31 1 8.1 7.9 7.9 7.9 7.7 7.7 7.7 MONTH 1 8.1 7.9 7.7 7.7

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

FEBRUARY MARCH APRIL MAY

1 7.7 7.7 7.7 7.8 7 7.8 7.8 7.8 2 7.7 7.7 7.7 7.8 7 7.8 7.8 7.8 3 7.7 7.7 7.7 7.8 7 7.8 7.8 7.8 4 7.7 7.7 7.7 7.8 7 7.8 7.8 7.8 5 7.7 7.7 7.7 7.8 7 7.8 7.8 7.8

6 7.7 7.7 7.7 7.8 7 7.8 7.8 7 7.7 7.7 7.7 7.8 7 8 7.7 7.7 7.7 7.8 7 9 7.7 7.7 7.7 7.8 7 10 7.7 7.7 7.7 7.8 7

11 7.7 7.7 7.7 7.8 7 12 7.7 7.7 7.7 7.8 7 13 7.7 7.7 7.7 7.8 7 14 7.7 7.7 7.7 7.8 7 15 7.7 7.7 7.7 7.8 7

16 7.7 7.7 7.7 7.8 7 17 7.7 7.7 7.7 7.8 7 18 7.7 7.7 7.7 7.8 7 19 7.7 7.7 7.7 7.8 7 20 7.7 7.7 7.7 7.8 7

21 7.7 7.7 7.7 7.8 7 22 7.7 7.7 7.7 7.8 7 23 7.8 7.7 7.8 7.8 7 24 7.8 7.8 7.8 7.8 7 25 7.8 7.8 7.8 7.8 7

26 7.8 7.8 7.8 7.8 7 27 7.8 7.8 7.8 7.8 7 28 7.8 7.8 7.8 7.8 7 29 7.8 7 30 7.8 7 31 7.8 7 MONTH 7.7 7.7 7.8 7.8 7.8 MINNESOTA RIVER BASIN 185 05330920 MINNESOTA RIVER AT PORT SNELLING STATE PARK AT ST. PAUL, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 8.0 8.0 8.0 7.7 7.6 7.6 7.7 7.7 7.7 8.0 8.0 8.0 7.7 7.7 7-7 7.7 7.6 7.6 8.1 8.0 8.0 8.1 7.7 7.9 7.7 7.6 7.6 8.1 8.0 8.0 8.1 8.1 8.1 7.6 7.5 7.5 8.1 8.0 8.0 8.1 8.1 8.1 7.5 7.5 7.5 8.1 8.0 8.0 8.1 8.0 8.1 7.5 7.5 7.5 8.1 8.0 8.0 8.1 8.0 8.0 7.5 7.4 7.5 8.1 8.0 8.0 8.1 8.0 8.0 7.5 7.4 7.5 8.1 8.0 8.0 8.1 8.0 8.1 8.1 7.5 7.8 10 8.1 8.0 8.0 8.0 7.8 7.9 8.2 8.2 8.2 11 8.1 8.0 8.0 8.2 7.8 8.0 8.2 8.1 8.2 12 8.1 8.0 8.0 8.2 8.1 8.1 8.1 8.1 8.1 13 8.1 8.0 8.0 8.2 8.2 8.2 8.1 8.0 8.1 lit 8.1 8.0 8.0 8.2 8.2 8.2 8.0 7.9 8.0 15 8.1 8.0 8.0 8.2 8.1 8.1 8.0 7.9 8.0 16 8.1 8.0 8.0 8.1 7.9 8.0 8.0 7.9 8.0 17 8.1 8.0 8.0 8.2 7.7 7.9 8.2 8.0 8.1 18 8.1 8.0 8.0 7.8 7.7 7.7 8. it 8.2 8.3 19 8.1 8.0 8.0 8.1 7.7 7.8 8.4 8.3 8.4 20 8.1 8.0 8.0 8.0 7.9 8.0 8.3 8.2 8.2 21 8.1 8.0 8.0 8.0 7.8 7.8 8.2 8.2 8.2 22 8.1 8.0 8.0 7.8 7.7 7.7 8.3 8.2 8.3 23 8.1 8.0 8.0 7.8 7.5 7.6 8.3 8.2 8.3 24 8.1 8.0 8.0 7.6 7.5 7.5 8.3 8.2 8.2 25 8.1 8.0 8.0 7.6 7.6 7.6 8.2 8.2 8.2 26 8.1 8.0 8.0 7.6 7.5 7.6 8.2 8.2 8.2 27 8.1 7.6 7.8 7.6 7.5 7.5 8.3 8.2 8.2 28 7.6 7.6 7.6 7.6 7.5 7.6 8.2 8.2 8.2 29 7.6 7.5 7.6 7.5 7.5 7.5 8.2 8.1 8.1 30 7.6 7.5 7.6 7.5 7.5 7.5 8.1 8.0 8.1 31 7.6 7.6 7.6 7.8 7.5 7.6 MONTH 8.1 7.5 7.9 8.2 7.5 7.8 8.4 7.it TEMPERATURE WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 14.5 lit.O lit.O 9.5 9.0 9.0 .5 .5 .5 .5 2 lit.O 13.5 13.5 10.0 9.5 9.5 .5 .5 .5 .5 3 13.5 13.0 13.5 9.5 9.5 9.5 .5 .5 .5 .5 it 13.0 13.0 13.0 9.5 9.5 9.5 .5 .5 .5 .5 5 13.0 13-0 13.0 9.5 9-5 9.5 .5 .5 .5 .5 6 13-0 12.5 13-0 9.5 9.5 9.5 .5 .5 .5 .5 7 13.0 12.5 13.0 9.5 9.0 9.5 .5 .5 .5 .5 8 13.0 11.0 12.5 9.0 8.5 9.0 .5 .5 .5 .5 9 11.0 11.0 11.0 8.5 6.5 7.5 .5 .5 .5 .5 10 11.0 11.0 11.0 6.5 6.5 6.5 .5 .5 .5 .5 11 11.5 11.0 11.0 6.5 6.0 6.0 .5 .5 .5 12 11.5 11.0 11.5 6.0 6.0 6.0 .5 .5 .5 13 11.5 11.5 11.5 6.0 6.0 6.0 .5 .5 .5 14 12.0 11.5 12.0 6.5 6.0 6.0 .5 .5 .5 15 12.0 12.0 12.0 6.5 6.0 6.5 .5 .5 .5 16 12.0 11.5 11.5 6.5 6.5 6.5 .5 .5 .5 17 12.0 11.5 11.5 6.5 6.5 6.5 .5 .5 .5 18 11.5 11.0 11.0 6.5 6.0 6.5 .5 .5 .5 19 11.0 10.0 10.5 6.0 6.0 6.0 .5 .5 .5 20 10.0 10.0 10.0 .5 .5 .5 21 10.0 9.5 10.0 .5 .5 .5 22 9-5 9.0 9-5 .5 .5 .5 23 9.0 8.5 8.5 .5 .5 .5 2i» 8.0 7.5 8.0 .5 .5 .5 25 7.5 7.5 7.5 .5 .5 .5 26 7.0 6.5 6.5 .5 .5 .5 27 7.0 6.5 6.5 .5 .5 .5 28 6.5 6.5 6.5 1.0 .5 1.0 29 7.0 6.5 7.0 1.0 1.0 1.0 30 8.0 7.5 7.5 1.5 1.0 1.0 31 9.5 9.0 9.0 1.0 .5 1.0 MONTH lit. 5 6.5 10.5 1.5 .5 .5 186 MINNESOTA RIVER BASIN 05330920 MINNESOTA RIVER AT PORT SMELLING STATE PARK AT ST. PAUL, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY

1 .5 .5 .5 2.0 1.5 2.0 4.5 2.5 3.5 2 .5 .5 .5 2.0 1.5 1.5 5.0 4.5 4.5 3 1.0 .5 1.0 1.5 1.5 1.5 5.0 4.5 5.0 4 1.0 .5 1.0 2.0 1.5 1.5 4.5 4.5 4.5 5 1.0 .5 1.0 2.0 1.5 1.5 4.0 4.0 4.0 6 1.0 1.0 1.0 2.0 1.5 1.5 4.0 3.5 4.0 7 1.0 1.0 1.0 1.5 1.5 1.5 8 1.0 .5 1.0 1.5 1.5 1.5 9 1.0 .5 1.0 1.5 1.5 1.5 10 1.0 .5 1.0 1.5 1.5 1.5 11 1.0 .5 .5 2.0 1.0 1.5 12 1.5 1.0 1.0 1.0 .5 1.0 13 1.5 1.0 1.5 1.0 .5 1.0 14 1.5 1.0 1.5 1.0 .5 1.0 15 1.0 1.0 1.0 1.0 1.0 1.0 16 1.5 .5 1.0 1.0 .5 1.0 17 3.0 1.0 2.0 1.0 1.0 1.0 18 3.0 2.5 3.0 1.0 1.0 1.0 19 2.5 2.0 2.0 1.0 .5 1.0 20 2.5 2.0 2.0 1.0 .5 1.0 21 2.0 2.0 2.0 1.0 .5 1.0 22 2.5 2.0 2.0 1.0 .5 1.0 23 2.0 2.0 2.0 1.0 .5 1.0 24 2.0 1.5 2.0 1.5 .5 1.0 25 2.0 1.5 2.0 1.5 1.0 1.5 26 2.0 2.0 2.0 1.5 1.0 1.5 27 2.0 2.0 2.0 1.5 1.0 1.5 28 2.0 2.0 2.0 2.0 1.5 1.5 29 2.0 2.0 2.0 30 2.5 2.0 2.0 31 3.0 2.5 2.5 MONTH 3.0 .5 1.5 3.0 .5 1.5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER

1 21.5 21.0 21.0 24.0 23.5 24.0 21.0 20.5 20.5 2 21.5 21.0 21.0 24.5 23.5 24.0 21.0 20.5 20.5 3 22.0 21.5 21.5 25.5 24.0 25.0 20.5 20.0 20.0 4 22.5 21.5 22.0 26.0 25.5 25.5 20.5 20.0 20.0 5 23.5 22.5 23.0 26.0 25.5 25.5 20.0 19-5 19.5

6 23.5 23.0 23.5 26.0 25.5 25.5 19.5 19.0 19.5 7 23.5 23.0 23.0 26.0 25.5 25.5 19.0 18.5 18.5 8 24.0 23.5 23.5 25.5 24.5 25.0 18.0 18.0 18.0 9 24.5 24.0 24.0 24.5 24.0 24.0 18.0 18.0 18.0 10 24.5 23.5 24.0 24.0 23.0 23.5 18.5 18.0 18.5

11 23.5 23.0 23.5 23.5 23.0 23.0 18.5 18.0 18.0 12 24.0 23.5 23.5 23.0 22.5 23.0 18.5 18.5 18.5 13 23.5 22.5 23.0 22.5 22.5 22.5 18.0 17.5 18.0 14 22.5 22.0 22.5 23.0 22.5 23.0 17.5 17.0 17.5 15 22.5 22.5 22.5 23.5 23.0 23.0 16.5 16.0 16.0

16 23.0 22.5 23.0 23.5 23.0 23.0 15.5 15.0 15.0 17 23.5 23.0 23.0 24.0 23.5 23.5 15.0 15.0 15.0 18 23.5 23.0 23.5 24.0 24.0 24.0 15.0 15.0 15.0 19 23.5 23.0 23.5 24.0 24.0 24.0 15.0 14.5 15.0 20 24.0 23.5 23.5 24.0 23.5 23.5 15.0 14.5 14.5

21 24.0 23-5 23.5 23.0 23.0 23.0 14.5 14.5 14.5 22 24.0 23.5 23.5 22.5 22.0 22.5 14.5 14.5 14.5 23 24.0 23.5 24.0 22.0 21.5 22.0 14.5 14.0 14.5 24 24.0 24.0 24.0 22.0 22.0 22.0 14.5 14.0 14.0 25 24.0 23.5 24.0 22.0 21.5 21.5 14.5 14.0 14.0

26 24.0 23.5 23.5 21.5 21.0 21.5 14.5 14.0 14.0 27 24.0 23.5 23-5 21.5 20.5 21.0 14.5 14.0 14.0 28 24.5 24.0 24.0 21.0 20.0 21.0 14.5 14.0 14.0 29 24.0 23.5 24.0 20.5 20.5 20.5 15.0 14.5 14.5 30 24.0 23.5 24.0 20.5 20.5 20.5 15.0 14.5 14.5 31 24.0 23.5 24.0 20.5 20.5 20.5

MONTH 24.5 21.0 23.5 26.0 20.0 23.5 21.0 14.0 16.5 187 MINNESOTA RIVER BASIN 05330920 MINNESOTA RIVER AT PORT SNELLING STATE PARK AT ST. PAUL, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 11.8 9.5 10.6 15.7 11.1 11.9 13.6 13.3 13-5 2 10.8 9.9 10.5 12.1 11.1 11.5 13.4 12.9 13.1 3 11.0 10.3 10.7 11.8 11.2 11.5 13.0 12.8 12.9 4 12.1 10.6 11.3 12.3 11.5 11.8 12.9 12.6 12.8 5 12.6 11.6 12.1 12.6 12.3 12.4 13.1 12.6 12.8 6 12.2 10.7 11.4 12.5 10.6 12.0 12.1 11.8 12.0 7 12.8 11.2 11.9 12.7 11.5 12.1 11.8 11.7 11.8 8 14.0 12.4 13.2 13.6 11.5 12.1 11.7 11.1 11.3 9 13.0 11.5 12.3 13.6 12.4 13.0 11.1 10.7 10.9 10 12.0 11.1 11.5 14.3 13.0 13.8 10.8 10.7 10.7 11 11.9 10.9 11.4 14.4 13.3 13.8 10.7 10.5 10.6 12 11.9 10.7 11.2 14.2 13.1 13.6 10.9 10.2 10.6 13 11.2 9.6 10.4 14.8 13.2 13.9 10.8 10.4 10.5 14 10.2 9.6 10.0 13.7 12.7 13.1 10.4 9.9 10.1 15 11.7 10.2 11.0 13.1 12.2 12.7 13.0 12.8 10.1 9.9 10.0 16 13.0 11.7 12.4 12.4 11.7 12.1 13.9 12.8 13.3 10.1 9.9 10.0 17 13.3 11.6 12.3 12.0 11.2 11.6 14.1 12.7 13.4 9.8 9.7 9.7 18 11.5 9.8 10.3 13.0 11.3 11.9 14.4 13.5 13-9 10.1 9.8 9-9 19 10.7 9.6 10.1 14.4 13.6 14.0 10.1 9.3 9.7 20 11.3 10.4 10.9 14.4 13.8 14.0 9.5 9.2 9.4 21 11.5 10.6 11.1 14.2 13.6 13.8 9.5 8.9 9.2 22 12.3 10.7 11.5 13.7 13.2 13.5 9.4 8.8 9.0 23 12.6 11.1 11.8 13.4 12.8 13.2 9.2 8.8 9.0 24 12.4 11.6 12.0 13.1 12.6 13.0 9.1 8.8 8.9 25 12.2 10.7 11.3 12.9 12.5 12.7 9.0 8.3 8.7 26 12.4 11.2 11.7 12.7 12.1 12.5 8.4 8.2 8.4 27 12.4 11.3 11.8 12.4 11.8 12.2 8.4 8.0 8.2 28 12.4 10.8 11.4 12.1 11.9 12.0 9.6 8.2 9.0 29 14.0 10.5 11.8 13.1 11.8 12.4 10.3 9.3 9.8 30 14.0 11.8 12.5 12.8 12.3 12.6 9.3 8.8 9.0 31 12.3 11.1 11.7 13.7 12.4 13.2 9.0 8.0 8.7 MONTH 14.0 7.6 11.4 13,6 8.0 10.4

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY

1 8.1 7.7 7.9 9.5 9.1 9.3 10.9 9.8 10.4 2 8.1 7.5 7.8 10.1 9.3 9.7 11.0 10.2 10.5 3 8.3 7.3 7.7 9.9 9.3 9.6 10.5 9.7 10.2 4 8.4 8.0 8.2 10.6 9.7 10.5 11.2 10.4 10.4 5 8.6 8.2 8.4 13.0 10.5 12.2 10.7 10.0 10.3 6 8.8 7.8 8.2 13.9 13.1 13.5 13.4 10.0 11.3 7 9.0 7.9 8.5 13.9 13.7 13.8 8 9.1 8.3 8.8 14.1 13.6 13.9 9 8.7 7.8 8.2 14.0 13.8 13.9 10 8.4 7.7 8.0 14.0 13.8 13.9 11 8.8 7.8 8.2 14.0 11.4 12.7 12 9.6 8.4 8.9 12.3 11.3 11.6 13 8.9 8.4 8.7 11.5 11.2 11.4 14 9.6 8.2 8.9 11.2 11.0 11.1 15 8.9 8.2 8.4 11.0 10.9 11.0 16 8.3 7.8 8.1 11.0 10.6 10.8 17 8.5 6.7 7.6 11.3 10.9 11.1 18 7.7 6.9 7.3 11.6 11.1 11.5 19 6.8 6.1 6.5 11.7 11.4 11.6 20 7.2 6.6 6.9 11.8 11.5 11.7 21 7.1 6.6 7.0 11.8 11.5 11.7 22 7.3 6.8 7.0 11.8 11.2 11.6 23 8.7 7.1 8.1 11.9 11.5 11.7 24 8.5 8.0 8.2 11.6 11.2 11.4 25 8.3 7.7 7.9 11.7 11.0 11.3 26 8.9 8.4 8.7 11.4 10.8 11.2 27 9.2 8.6 8.9 11.5 11.0 11.2 28 9.4 8.7 9.1 12.0 9.9 11.5 29 11.8 9.5 10.6 30 12.0 11.3 11.6 31 11.5 10.8 11.2 MONTH 9.6 6.1 14.1 9.1 11,6 188 MINNESOTA RIVER BASIN 05330920 MINNESOTA RIVER AT PORT SMELLING STATE PARK AT ST. PAUL, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 8.9 7.8 8.4 7.1 6.8 6.9 7.0 5.9 6.4 2 8.3 7.5 7.9 7.4 6.8 7.2 7.7 6.2 6.8 3 8.8 7.1 7.9 7.5 6.5 7.0 8.0 6.6 7.1 4 9-3 7.6 8.3 7.5 6.3 6.8 8.2 6.5 7.4 5 8.7 7.9 8.2 7.2 6.3 6.8 8.0 7.3 7.7 6 7.8 5.6 6.8 6.9 6.4 6.6 8.6 7.6 8.2 7 6.0 4.7 5.3 7.8 6.5 7.3 8.7 7.7 8.2 8 5.7 5.0 5.4 7.9 7.0 7.5 9.1 8.2 8.8 9 5.9 5.2 5.6 7.1 6.1 6.7 9.2 7.4 8.4 10 5.8 5.3 5.6 7.6 6.7 7.0 9.4 8.4 8.9 11 7.4 5.8 6.6 7.8 7.0 7.4 9.9 7.7 8.9 12 7.1 6.2 6.7 8.3 6.0 7.2 8.7 8.2 8.4 13 6.8 5.7 6.1 7.4 6.6 6.9 9.0 7.9 8.4 14 6.4 6.0 6.2 7.2 6.6 6.9 7.9 6.5 7.2 15 6.4 6.2 6.3 7.2 6.5 6.9 7.3 6.4 6.7 16 6.5 6.2 6.4 7.3 6.4 6.9 8.3 6.5 7.5 17 6.4 6.2 6.3 7.2 6.4 6.7 9.6 8.2 8.9 18 6.6 6.2 6.4 11.0 6.5 8.7 12.3 9.7 11.3 19 6.7 6.3 6.5 11.1 7.3 9.9 12.2 10.9 11.6 20 6.9 6.0 6.5 10.2 7.6 8.8 10.7 9.4 9.8 21 6.5 5.9 6.1 7.7 5.7 6.8 10.2 9.2 9.7 22 5.9 5.8 5.9 6.7 5.4 6.3 10.6 9.6 10.1 23 7.3 5.8 6.1 6.1 5.9 6.0 11.2 10.4 10.8 24 6.2 5.9 6.0 6.1 5.4 5.8 11.0 9.8 10.3 25 6.2 6.0 6.1 6.3 4.9 5.5 10.8 9.6 10.1 26 6.3 6.0 6.2 7.0 5.1 5' 9 11.4 10.3 10.8 27 6.4 5.7 6.1 7.0 5.7 6.3 12.6 11.1 11.8 28 5.9 5.7 5.8 9.1 6.6 8.1 13.9 12.2 12.9 29 6.0 5.6 5.8 8.7 6.5 7.2 13.7 12.3 12.8 30 6.7 5.8 6.3 8.8 7.7 8.5 14.2 11.5 12.8 31 6.8 6.5 6.6 8.8 6.0 7.5 MONTH 9,3 4.7 6.4 11.1 4,9 7.0 14.2 5.9 9.3 MISSISSIPPI RIVER MAIN STEM 189 05331000 MISSISSIPPI RIVER AT ST. PAUL, MN LOCATION.—Lat 44°56'40", long 93°05'20", in SE4NEJ sec.6, T.28 N., R.22 W., Ramsey County, Hydrologic Unit 07010206, on left bank in St. Paul, 300 ft (91 m) upstream from Robert Street Bridge, 6 mi (10 km) downstream from Minnesota River, and at mile 839-3 (1,350 km) upstream from Ohio River. DRAINAGE AREA.—36,800 mi 2 (95,300 km 2 ), approximately. WATER-DISCHARGE RECORDS PERIOD OP RECORD.--Water year 1867-69, 1872-92 (annual maximums), March 1892 to current year (prior to 1901, frag­ mentary during some winters). Records prior to March 1892, published in the 19th Annual Report, Part 4, have been found to be unreliable and should not be used. Monthly discharge only for some periods, published in WSP 1308. Gage-height records (winter records incomplete) collected at same site since 1866 are contained in reports of U.S. Weather Bureau, War Department and Mississippi River Commission. REVISED RECORDS.—WSP 285: 1892-96. WSP 715: Drainage area. WSP 875: 1938. WSP 895: 1939. WSP 1308: 1867(M). WSP 1508: 1897, 1898(M), 1903W, 1917-l8(M), 1928(M), 1929- WRD MN-74: 1973. GAGE.—Water-stage recorder. Datum of gage is 683.62 ft (208.367 m) National Geodetic Vertical Datum of 1929. Prior to Mar. 18, 1925, nonrecording gage at several sites within 300 ft (91 m) of present site at present datum. Mar. 18, 1925, to Mar. 10, 1933, water-stage recorder and Mar. 11, 1933, to Sept. 14, 1939, nonrecording gage, at present site and datum. Since September 1938, auxiliary water-stage recorder 5.6 mi (9-0 km) downstream. REMARKS.—Records good. Slight regulation except during extreme floods by reservoirs on headwaters and by power- plants. Beginning July 20, 1938, sewage from Minneapolis and St. Paul, which formerly entered above station, was diverted to a sewage-disposal plant, thence to river below station. Figures of daily discharge do not include this diversion. COOPERATION.—Records of Mississippi River at Twin City lock and dam computed and furnished by Pord Motor Co. Diversion through sewage disposal plant furnished by Metropolitan Waste Control Commission. AVERAGE DISCHARGE (ADJUSTED POR DIVERSION).—84 years (water years 1895, 1897, 1901-82), 10,640 ft3/s (301.3 n3/s), 3.93 in/yr (100 mm/yr); median of yearly mean discharges, 10,000 ft^/s (28§ irP/s), 3.69 in/yr (94 mm/yr). EXTREMES POR PERIOD OP RECORD (1867-70, 1872-1982) .—Maximum discharge, 171,000 ft3/ s (4,840 itP/s) Apr. 16, 1965, gage height, 26.01 ft (7.928 m) from floodmark. Maximum flood known since at least 1851, that of 1965. Flood of Apr. 11, 1870 reached a stage of 19.4 ft (5.9 m), discharge, 100,000 ft3/s (2,830 m3/s). EXTREMES POR PERIOD OP RECORD (1897,1917-82).—Minimum daily discharge, 632 ft3/ s (17-9 m3/ s ) Aug. 26, 1934. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 57,600 ft3/s (1,630 mVs) Apr. 22, gage height, 11.64 ft (3-548 m); minimum daily, 4,120 ft3/ s (117 nP/s) Sept. 7. DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 5630 15200 9230 7180 5080 5710 32500 38900 33700 13600 2 4370 14900 9750 6670 5080 5770 37100 36300 33200 12900 3 6330 14900 9090 6720 5170 5620 38500 34100 32800 12500 4 5790 13900 8750 6700 5170 5890 39900 32600 32000 11500 5 6600 13900 8400 5800 5170 6290 41000 31100 30500 10600 6 7420 14000 7760 5930 5170 7540 43200 30500 29100 11100 7 7340 14100 8280 5920 5220 7430 45000 29900 26300 11200 8 7660 14000 7530 5900 5260 7160 46000 28300 24300 11000 9 7630 12300 8170 5870 5260 6170 46600 28100 22900 10800 10 11800 7440 5850 5260 6410 46700 28800 20600 11600 11 8520 11300 6420 5830 5250 7030 46700 28300 20100 11800 12 10600 11800 7200 5610 5250 7300 46200 27400 19800 12700 13 10900 11600 7450 5840 5300 7240 45200 27200 19900 14300 14 11400 11500 6950 5610 5480 7680 44700 27300 19300 15200 15 11900 11500 6220 5340 5420 8140 44800 28700 18500 15400 16 12400 11200 5270 5320 5400 9320 46000 30200 16900 15000 17 12900 10800 4690 5240 5690 11300 48300 31400 16200 14300 18 14200 11000 4540 5230 5600 12400 50900 33800 16000 13400 19 14800 11000 5530 5220 5400 14000 53200 37100 16000 12200 20 15400 10700 5500 5260 5530 15800 56100 42300 16200 13100 21 16800 9480 4850 5240 5740 17500 57200 45900 15800 13300 4720 8760 22 17100 8940 6l4o 5220 5830 19200 57400 46300 15500 12700 4570 8590 23 18000 9570 7470 5200 5450 21100 57000 45500 14800 11600 4440 8460 24 18600 9170 7010 5180 5650 22500 56000 44800 14800 11100 4600 8140 25 • 18000 8900 6980 5160 5570 22800 54300 43700 14700 11700 4870 7020 26 17700 9440 6690 5150 5530 23700 52400 41800 14300 13200 4470 7420 27 18100 9300 6910 5140 5280 24800 50100 40400 14600 11900 4200 7630 28 17200 9560 7140 5080 5280 26100 47600 38600 14000 10200 4370 7070 29 16200 8930 7150 4920 —— 27800 44900 36900 14500 9130 5080 6980 30 15700 8890 6720 4900 —— 29800 41700 35400 13600 10000 4820 6270 31 15100 6800 4940 —— 30200 • —— 34400 —— 9330 4410 —— TOTAL 379280 343580 218030 173170 150490 429700 1417200 1086000 610900 378360 177650 196130 MEAN 12230 11450 7033 5586 5375 13860 47240 35030 20360 12210 5731 6538 MAX 18600 15200 9750 7180 5830 30200 57400 46300 33700 15400 9060 8760 MIN 4370 8890 4540 4900 5080 5620 32500 27200 13600 9130 4200 4120 CPSM .33 .31 .19 .15 .15 .38 1.28 .95 .55 .33 .16 .18 IN. .38 .35 .22 .18 .15 .43 1.43 1.10 .62 .38 .18 .20 t 312 267 264 277 287 333 366 370 332 329 356 356 MEAN t 12542 11717 7297 5863 5662 14193 47610 35400 20692 12540 6087 6894 CPSM * .34 .32 .20 .16 .15 .39 1.29 .96 .56 .34 .17 .19 IN. t .39 .36 .23 .18 .16 .44 1.44 1.11 .63 .39 .19 .21 CAL YR 1981 TOTAL 3431300 MEAN 9401 MAX 25900 MIN 1920 MEAN * 9704 CPSM * .26 IN? 3.58 WTR YR 1982 TOTAL 5560490 MEAN 15230 MAX 57400 MIN 4120 MEAN * 15551 CFSM * .42 IN t 5.74 t Diversion equivalent in cubic feet per second, through sewage disposal plant. £ Adjusted for diversion. 190 MISSISSIPPI RIVER BASIN 05331000 MISSISSIPPI RIVER AT ST. PAUL, MN—Continued WATER-QUALITY RECORDS PERIOD OP RECORD.—Water years 1956 to current year. PERIOD OP DAILY RECORD.— WATER TEMPERATURES: October 1956 to current year. INSTRUMENTATION.—Temperature recorder since October 1956, EXTREMES FOR PERIOD OP DAILY RECORD.— WATER TEMPERATURES: Maximum 31.0°C July 21-28, 1964, July 31, 1975, July 19, 21, 1977; minimum, 0.0°C many days during winter periods. EXTREMES FOR CURRENT YEAR.— WATER TEMPERATURES: Maximum, 29.5°C Aug. 5-7; minimum, 0.0°C many days during winter period.

TEMPERATURE WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY

1 lit. 5 14. 5 14.5 8.0 7.0 7.5 2.5 2.0 2.0 1.5 .5 1.0 2 lit. 5 14.0 14.5 8.0 7.0 7.5 2.0 1.5 2.0 1.5 1.5 1.5 3 lit.O 14.0 14.0 8.0 8.0 8.0 2.0 1.5 1.5 1.5 1.0 1.5 it 13.5 12.0 13.0 8.0 8.0 8.0 2.0 1.5 1.5 2.0 1.5 1.5 5 13.5 13.0 13.5 8.0 8.0 8.0 1.5 1.0 1.0 2.0 1.5 1.5

6 13.5 12.0 12.5 7.5 7.5 7.5 1.0 1.0 1.0 2.0 1.0 1.5 7 12.5 11.5 12.0 7.5 7.0 7.5 2.0 1.0 1.5 1.5 1.0 1.5 8 12.5 11.5 12.0 7.5 7.0 7-5 1.5 1.0 1.5 2.0 1.0 1.5 9 12.5 11.5 12.0 7.0 6.5 7.0 1.5 1.0 1.5 2.0 1.0 1.5 10 12.0 11.5 11.5 6.5 5.5 6.0 1.0 1.0 1.0 2.0 1.5 1.5

11 12.0 11.5 11.5 6.0 5.5 5.5 1.5 1.0 1.0 2.0 1.5 2.0 12 12.5 12.0 12.5 6.0 5.0 5-5 1.5 1.0 1.0 2.0 1.5 1.5 13 13.0 12.5 13.0 6.0 5.5 5.5 1.5 1.0 1.0 2.0 1.5 1.5 14 13.5 13.0 13.5 6.0 5.5 6.0 1.5 1.0 1.0 2.0 1.0 1.5 15 lit.O 13.5 13.5 7.0 6.0 6.5 1.5 1.0 1.5 2.0 1.5 1.5

16 13.5 13.0 13.5 7.0 6.5 7.0 1.5 1.0 1.5 2.0 1.5 1.5 17 13.0 13.0 13.0 7.0 6.5 7.0 2.0 1.5 1.5 2.0 1.0 1.5 18 13.0 11.0 12.0 7.0 6.0 6.5 2.0 1.0 1.5 2.0 1.0 1.5 19 11.0 10.0 10.5 6.0 5.0 5.5 1.5 .5 1.0 1.5 1.0 1.5 20 10.5 10.0 10.0 5.0 4.5 5.0 1.5 1.0 1.0 1.5 1.0 1.5

21 10.0 10.0 10.0 4.5 3.5 4.0 1.5 1.0 1.0 2.0 1.0 1.5 22 10.0 10.0 10.0 3.5 2.5 3.0 1.5 1.0 1.5 2.0 1.5 1.5 23 10.0 9.5 9.5 2.5 2.0 2.5 1.5 1.0 1.0 2.0 1.5 1.5 24 10.0 9.5 9.5 3.0 2.0 2.5 1.5 1.0 1.5 2.0 1.0 1.0 25 9.5 8.5 9.o 3.0 2.5 2.5 1.5 1.0 1.5 2.0 1.0 1.5

26 8.5 7.0 7.5 2.5 2.0 2.5 1.5 1.0 1.5 1.5 1.0 1.0 27 7.0 6.5 6.5 2.5 2.0 2.5 1.5 1.0 1.5 1.5 1.0 1.5 28 6.5 5.5 6.0 2.0 2.0 2.0 1.5 1.0 1.5 1.5 1.0 1.0 29 6.5 6.0 6.0 2.0 1.5 2.0 1.5 1.0 1.5 1.5 1.0 1.0 30 6.5 6.0 6.5 2.0 1.5 2.0 2.0 1.0 1.5 1.5 1.0 1.0 31 7.0 6.5 7.0 1.5 1.0 1.5 1.5 .5 1.0 MONTH lit. 5 5-5 11.0 8.0 1.5 5.5 2.5 .5 1.5 2.0 .5 1.5 MISSISSIPPI RIVER MAIN STEM 191 05331000 MISSISSIPPI RIVER AT ST. PAUL, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY

1 1. 5 1. 0 1.5 1.0 1.0 1.0 4.5 4.0 4.5 15.5 14.5 15.0 2 1. 5 1. 0 1.5 1.0 .5 1.0 4.0 3.5 4.0 16.5 15.5 16.0 3 1. 5 1. 0 1.5 1.0 .5 .5 4.0 3.0 3.5 17.5 16.5 17.0 4 1. 5 1. 0 1.5 1.0 .5 1.0 2.5 2.0 2.5 19.0 17.0 18.0 5 1. 5 1. 0 1.0 1.0 .5 1.0 3.0 2.0 2.5 18.5 17.5 18.5

6 1. 5 1. 0 1.5 1.0 .5 .5 2.5 2.0 2.0 17.5 16.5 17.0 7 2. 0 1. 0 1.5 .5 .5 .5 2.5 2.0 2.5 16.5 16.0 16.5 8 1. 5 1. 0 1.5 .5 .5 .5 3.0 2.0 2.5 17.0 16.0 17.0 9 1. 5 1. 0 1.0 1.0 .5 1.0 2.5 2.0 2.0 17.5 16.5 17.0 10 1. 5 1. 0 1.5 1.0 .5 1.0 3.0 2.0 2.5 19.0 17.0 18.0

11 1. 5 1. 0 1.5 1.0 1.0 1.0 3.0 2.5 2.5 19.5 18.5 19.0 12 1. 0 . 5 1.0 1.5 1.0 1.0 4.0 3.0 3.5 19.5 17.5 18.5 13 1. 0 . 5 1.0 1.5 1.5 1.5 4.5 3.5 4.0 17.5 16.5 17.0 14 1. 0 . 5 1.0 1.5 1.5 1.5 6.0 4.5 5.5 19.5 17.5 18.5 15 • 5 • 0 .5 2.0 1.5 1.5 7.5 6.0 7.0 19.5 18.5 19.0

16 ^ 5 . 0 .5 2.0 1.5 2.0 8.5 7.5 8.0 19.5 18.0 19.0 17 . 0 . 0 .0 2.0 2.0 2.0 8.0 7.5 7.5 19.5 18.5 19.0 18 . 0 . 0 .0 2.5 2.0 2.0 7.5 7.5 7.5 19.0 18.0 18.5 19 . 0 . 0 .0 2.5 1.0 2.0 8.0 7.5 7.5 19.0 18.0 18.5 20 • 5 • 0 .0 1.0 .5 1.0 8.0 6.5 7.5 19.0 18.5 19.0

21 1. 0 . 5 .5 1.0 .0 .5 8.5 7.5 8.0 18.5 18.0 18.0 22 1. 0 1. 0 1.0 2.0 .5 1.0 9.0 8.0 8.5 18.0 17.5 17.5 23 1. 0 . 5 1.0 2.5 1.0 1.5 10.5 9.0 9.5 18.0 17.0 17.5 24 1. 0 . 5 1.0 2.5 1.0 2.0 11.5 10.0 11.0 18.5 18.0 18.0 25 1. 0 1. 0 1.0 3.0 2.5 2.5 12.5 11.5 12.0 18.5 18.5 18.5

26 1. 0 1. 0 1.0 2.5 2.0 2.0 13.5 12.5 13.0 18.5 18.0 18.5 27 1. 0 1. 0 1.0 2.5 2.0 2.0 14.0 13.5 14.0 19.0 18.0 18.5 28 1. 0 1. 0 1.0 3.0 2.0 2.5 14.5 14.0 14.0 19.5 18.5 19.0 29 — - —- —— 3.5 2.5 3.0 15.0 14.5 14.5 20.5 19.5 20.0 30 — - — - 3.5 3.0 3.5 15.0 14.5 14.5 21.0 20.0 20.5 31 — - — - —— 4.5 3.0 4.0 21.0 20.5 21.0

MONTH 2.0 .0 1.0 4.5 .0 1.5 15.0 2.0 7.0 21.0 14.5 18.0

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER

1 20.5 20.0 20.0 24.5 24.0 24.0 27.0 26.0 26.5 22.5 21.0 21.5 2 20.0 19.5 19.5 24.5 24.0 24.0 28.0 26.0 27.0 22.5 21.5 22.0 3 19.5 19.0 19.5 25.0 24.0 25.0 28.5 27.0 27.5 22.5 21.5 22.0 4 20.0 19.0 19.5 26.5 25.0 25.5 29.0 27.5 28.0 23.0 22.0 22.5 5 20.0 19.5 19.5 27.5 26.5 27.0 29.5 28.5 29.0 22.5 21.5 22.5

6 20.0 19.5 19.5 28.0 27.0 27.5 29.5 28.5 29.0 21.5 20.5 21.5 7 19.5 19.0 19.5 27.5 26.5 27.0 29.5 28.5 29.0 21.5 20.5 21.0 8 20.0 19.0 19.5 26.5 26.0 26.5 29.0 27.5 28.0 20.5 20.0 20.5 9 20.0 19-5 20.0 27.0 26.0 26.5 27.5 25.0 26.5 20.5 19.5 20.0 10 20.0 19.0 19.5 26.0 24.5 25.5 25.0 24.0 24.5 21.5 20.5 21.0

11 20.5 19.0 19.5 25.0 24.5 24.5 24.0 23.5 24.0 22.0 21.0 21.5 12 20.5 19.5 20.0 25.5 24.0 24.5 24.0 23.0 23-5 22.5 22.0 22.5 13 21.0 20.0 20.5 26.0 25.5 25-5 23.5 22.5 23.0 22.5 21.5 22.0 14 21.0 20.5 20.5 26.0 25.5 26.0 23.5 22.5 23.0 22.0 20.5 21.0 15 20.5 20.0 20.5 26.0 26.0 26.0 24.0 23.0 23.5 20.0 18.5 19.0

16 21.5 20.5 21.0 26.5 26.0 26.5 24.0 23.5 23-5 18.5 17.5 18.0 17 22.0 21.5 21.5 27.0 26.5 26.5 25.5 24.0 24.5 17.5 16.5 17.0 18 21.5 21.0 21.5 27.5 26.5 27.0 26.5 25.5 26.0 17.5 16.5 17.0 19 21.5 20.5 21.0 27.0 26.5 27.0 27.0 26.0 26.5 17.0 16.5 16.5 20 20.5 20.0 20.0 27.5 27.0 27.0 27.0 26.5 26.5 16.5 16.0 16.5

21 20.5 20.0 20.5 27.5 27.0 27-5 27.0 26.0 26.5 16.5 15.5 16.0 22 21.0 20.5 21.0 28.0 27.0 27.5 26.5 25.5 26.0 16.5 15.0 15.5 23 22.0 21.0 21.5 28.5 27.5 28.0 25.5 25.0 25.5 17.0 15.5 16.0 24 22.0 21.5 22.0 28.0 27-5 27-5 25.5 24.5 24.5 16.5 16.0 16.0 25 22.5 22.0 22.0 27.5 27.0 27.5 24.5 24.0 24.5 16.5 16.0 16.5

26 23.0 22.0 22.5 27.5 26.5 27.0 24.0 23.5 24.0 16.5 16.0 16.5 27 24.0 23.0 23.0 27.0 26.0 26.5 24.0 23.0 23.5 16.5 15.5 16.0 28 25.0 24.0 24.5 27.0 26.0 26.5 23.0 22.5 22.5 17.0 15.5 16.5 29 24.5 24.5 24.5 27.0 26.5 27.0 22.5 21.0 22.0 18.0 17.0 17.5 30 24.5 24.0 24.0 27.0 26.0 26.5 21.5 21.0 21.0 18.0 17.5 18.0 31 —— —— —— 27.0 26.0 26.5 21.5 21.0 21.0 MONTH 25.0 19.0 21.0 28.5 24.0 26.5 29.5 21.0 25.0 23.0 15.0 19.0 192 MISSISSIPPI RIVER MAIN STEM 05331005 MISSISSIPPI RIVER AT INDUSTRIAL MOLASSES, ST. PAUL, MN LOCATION.—Lat 44°55'52", long 93°02'52", in NEJNE4 sec.9, T.28 N., R.22 W., Ramsey County, Hydrologic Unit 07010206, on left bank at molasses plant, 0.5 mi (0.8 km) upstream from Metropolitan waste treatment plant, 2.0 mi (3.2 km) downstream from Lafayette bridge and at mile 836.6 (1,316 km) upstream from Ohio River. PERIOD OP RECORD.--March 1976 to current year. PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE: March 1976 to current year. pH: March 1976 to current year. WATER TEMPERATURES: March 1976 to current year. DISSOLVED OXYGEN: March 1976 to current year. INSTRUMENTATION.—Water-quality monitor since March 1976. REMARKS.--Extremes are published for years with 80 percent or more record. COOPERATION.—Water-quality monitor is operated by the Metropolitan Waste Control Commission, St. Paul, MN. EXTREMES FOR PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE (water years 1980-81): Maximum, 723 micromhos Dec. 17, 1979; minimum, 230 microrahos Mar. 24, 1980. pH (water years 1980-82): Maximum, 8.8 units Nov. 21, 1979; minimum, 7.1 units Aug. 17, 18, 1980, Apr. 24, Oct. 19, 1981, Jan. 15-18, 21, 22, 24, 1982. WATER TEMPERATURES (water years 1980-82): Maximum, 29-5°C July 14, 1980; minimum, 0.5°C several days during winter. DISSOLVED OXYGEN (water years 1980-82): Maximum, 15.6 mg/L Mar. 24, 1981; minimum, 2.9 mg/L Aug. 17, 25, 1980. EXTREMES FOR CURRENT YEAR.— pH: Maximum, 8.6 units Aug. 2; minimum, 7.4 units Oct. 19, Jan. 15-18, 21, 22, 24. WATER TEMPERATURES: Maximum, 28.5°C Aug. 6, 7; minimum, 0.5°C several days during winter. DISSOLVED OXYGEN: Maximum, 14.6 mg/L Dec. 20; minimum, 5.6 mg/L Aug. 15.

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 490 457 476 444 415 431 524 472 496 648 598 615 2 482 425 456 449 418 432 535 493 516 639 614 627 3 475 450 464 444 298 378 526 489 510 656 592 619 4 463 410 438 334 302 319 533 486 512 619 564 601 5 463 423 443 436 304 363 533 496 516 602 542 572 6 445 416 432 437 406 421 515 478 499 622 573 601 7 447 416 432 436 406 422 558 498 519 637 537 583 8 453 429 443 441 408 425 617 505 567 595 553 577 9 455 420 441 440 407 425 632 584 608 576 546 563 10 465 435 453 434 411 421 583 534 559 629 557 589 11 469 431 448 590 557 571 613 553 584 12 468 429 449 447 421 435 593 513 568 586 537 568 13 464 416 451 450 423 437 591 557 575 604 539 574 14 460 418 444 455 426 445 613 570 591 570 536 552 15 456 422 438 456 432 448 598 548 573 564 532 551 16 445 406 428 454 427 444 594 508 541 575 526 553 17 435 403 417 454 425 439 640 618 630 564 509 546 18 434 407 422 447 431 408 654 604 614 580 509 551 19 433 397 416 443 437 444 657 598 610 559 520 542 20 439 411 425 457 429 446 619 592 606 565 516 540 21 441 407 425 473 433 481 649 552 607 555 508 534 22 441 416 428 474 439 457 663 648 655 642 510 599 23 442 410 425 475 444 460 645 612 629 654 608 632 24 444 409 429 474 440 456 627 592 610 679 646 656 25 442 416 430 486 449 467 647 604 622 647 632 642 26 447 423 433 489 451 471 642 591 613 635 458 556 27 442 413 428 483 454 472 643 604 625 491 451 474 28 447 412 433 488 448 471 625 593 614 501 457 482 29 453 415 435 493 457 477 603 560 581 494 457 479 30 456 418 436 499 456 482 616 589 604 507 453 483 31 451 422 438 632 591 616 509 442 471 MONTH 490 397 437 663 472 579 679 442 565 193 MISSISSIPPI RIVER MAIN STEM 05331005 MISSISSIPPI RIVER AT INDUSTRIAL MOLASSES, ST. PAUL, MN—Continued SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 482 438 465 561 521 545 549 535 2 484 443 463 560 531 547 529 480 506 3 485 441 467 593 539 562 509 479 497 4 488 446 472 619 579 602 500 470 486 5 479 444 462 631 591 617 493 461 476 6 485 439 463 631 524 572 485 455 471 7 494 445 475 538 495 521 479 450 468 8 490 457 477 552 483 522 475 443 459 9 614 450 537 526 481 503 468 443 457 10 601 587 595 523 480 507 466 440 454 11 601 584 593 554 495 521 475 443 463 12 610 556 590 546 490 517 479 452 467 13 590 558 568 553 481 520 484 459 474 14 569 537 555 539 504 524 499 459 480 15 541 527 532 577 536 555 484 465 475 16 528 504 512 597 524 567 17 523 488 506 531 503 518 18 524 487 508 515 477 498 19 534 392 512 505 468 486 20 576 502 531 505 469 485 21 642 527 569 503 465 483 22 651 530 582 500 471 490 23 576 527 553 498 471 484 24 574 523 548 506 476 492 25 549 510 531 505 476 494 26 555 525 541 518 484 505 27 561 521 540 536 500 521 28 561 521 545 546 520 536 29 —— —— —— 556 531 547 30 —— —— —— 561 531 546 31 —— —— —— 562 526 542 MONTH 651 392 525 631 465 527

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 626 599 613 650 605 628 499 422 477 2 632 593 611 624 564 585 493 451 470 3 626 605 618 594 567 582 490 438 471 4 639 610 622 477 454 467 5 642 607 625 496 458 477 6 642 598 617 649 602 624 516 481 495 7 621 600 613 601 538 566 499 469 489 8 621 590 606 627 557 592 505 459 489 9 617 595 609 491 444 471 10 620 574 603 570 557 564 504 446 481 11 614 583 599 537 500 512 494 455 479 12 623 588 607 483 448 466 500 467 487 13 634 606 620 519 457 477 492 455 473 14 632 595 613 517 452 495 479 449 466 15 628 604 615 498 457 482 491 466 480 16 635 609 621 510 440 469 497 470 483 17 636 614 627 487 445 463 496 454 481 18 636 618 629 489 458 477 504 438 473 19 484 461 474 506 478 498 20 503 480 494 21 503 461 487 22 621 598 611 489 453 474 23 623 563 593 493 467 482 24 697 602 649 515 465 483 25 692 613 653 503 456 478 26 680 610 645 486 470 480 537 475 506 27 637 611 624 480 450 470 525 461 487 28 648 624 635 484 '143 467 481 452 471 29 649 613 631 490 438 474 485 462 474 30 625 600 612 498 457 479 479 459 471 31 494 460 481 MONTH 537 422 480 MISSISSIPPI RIVER MAIN STEM 05331005 MISSISSIPPI RIVER AT INDUSTRIAL MOLASSES, ST. PAUL, MN — Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 7.9 7.7 7-8 7.8 7-7 7.7 7.7 7.6 7.7 7.7 7.6 7.6 7.9 7.7 7.8 7.8 7.7 7.8 7.7 7.6 7.6 7.6 7.6 7.6 7.8 7-7 7.8 8.0 7.7 7.8 7.7 7.6 7.6 7.6 7-6 7.6 7-9 7.7 7.8 7.8 7.7 7.8 7-7 7.6 7.6 7.6 7.5 7.6 7.8 7.7 7.8 7.8 7.8 7.8 7-7 7.6 7.6 7.7 7.5 7.5 6 7.8 7.7 7.7 7.9 7.7 7.8 7.6 7.5 7.6 7.6 7.6 7-6 7 7.8 7.6 7.7 7.8 7.8 7.8 7.6 7.5 7.6 7.6 7.6 7.6 8 7.9 7.7 7.8 7.8 7.8 7.8 7.7 7.5 7.6 7.6 7.5 7.5 9 7.9 7.7 7.8 7.8 7.8 7.8 7.7 7.6 7.7 7-5 7.5 7-5 10 7.8 7.7 7.8 7.8 7.8 7-8 7.7 7.7 7.7 7.5 7.5 7.5 11 7.8 7-6 7-7 7~8 7-7 7.7 7.7 7.5 7.5 7.5 12 7.8 7-7 7.7 7.8 7.8 7.7 7.7 7.7 7.5 7.5 7.5 13 7.8 7.6 7.7 7.9 7.7 7.8 7.7 7.7 7.7 7.6 7.5 7.5 14 7.6 7.6 7.6 7.8 7.7 7-7 7.8 7.7 7.7 7.5 7.5 7.5 15 7.7 7.6 7.6 7.8 7.7 7-7 7.7 7.6 7.7 7-5 7.4 7.5 16 7.7 7.5 7.6 7.7 7.7 7-7 7-7 7.6 7.6 7.5 7.4 7.4 17 7.6 7.5 7.6 7.8 7.7 7-7 7.7 7.6 7.6 7.5 7.4 7-4 18 7.5 7.5 7.5 7-7 7.7 7-7 7.7 7.6 7.6 7.5 7.4 7.4 19 7-7 7.4 7.5 7-7 7.6 7.7 7-7 7.6 7.6 7.5 7.5 7.5 20 7-7 7.5 7.6 7.6 7.6 7.6 7.7 7.6 7.6 7.5 7.5 7.5 21 7.8 7.6 7.7 7.6 7.6 7.6 7.7 7.6 7.6 7.5 7.4 7.5 22 7.7 7.7 7.7 7.6 7.6 7.6 7.6 7.5 7.6 7.5 7.4 7.4 23 7.9 7.6 7.9 7.7 7.6 7.6 7.6 7.5 7.5 7.6 7.5 7.5 24 7-8 7.8 7.8 7.6 7.6 7.6 7-6 7.6 7.6 7.5 7.4 7.5 25 7.8 7.7 7.8 7.7 7.6 7.6 7.6 7.5 7.6 7.6 7.5 7-5 26 7.8 7.7 7.8 7-7 7.6 7.6 7.6 7.6 7.6 7.5 7.5 7.5 27 7.8 7.7 7.8 7.6 7.6 7.6 7.6 7.6 7.6 7.5 7.5 7.5 28 7.8 7-7 7.7 7.6 7.6 7.6 7.7 7.6 7.6 7.5 7.5 7.5 29 7.8 7.7 7.7 7.7 7.6 7.6 7.6 7.6 7.6 7.6 7.5 7.5 30 7.8 7.7 7.8 7.7 7.6 7.6 7.7 7.7 7.7 7.5 7.5 7.5 31 7.8 7.7 7.7 7.7 7.7 7.7 7.5 7.5 7.5 MONTH 7.9 7.4 7.7 7.5 7.6 7.7 7.4 7.5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 7.6 7-5 7.5 8.0 7-9 7.9 8.0 8.0 8.0 2 7.7 7.5 7.5 8.0 7-9 7-9 8.1 7.9 8.0 3 7.6 7.5 7-5 7-9 7.8 7.9 8.0 7.9 8.0 4 7.5 7.5 7.5 7.9 7.8 7.9 8.0 7.9 8.0 5 7.9 7.5 7.6 7.9 7.8 7.9 8.0 7.8 7.9 6 7-7 7.6 7.7 7.9 7.8 7.9 8.1 7.9 8.0 7 7.7 7.7 7.7 7.9 7.8 7.9 8.0 7.9 7-9 8 7.8 7.7 7.7 7.9 7.8 7.9 8.0 7.9 7.9 9 7.7 7.6 7.7 7.9 7.8 7-9 7.9 7.9 7-9 10 7.7 7.6 7.6 7.9 7.8 7.9 8.0 7.9 7.9 11 7-8 7.6 7.6 I' 9 7.9 7.9 7.9 7.8 12 7-7 7-6 7.6 8.0 7.9 7.9 8.0 7.9 8.0 13 7.6 7.6 7.6 7.9 7.9 7.9 8.0 8.0 8.0 14 7.6 7.6 7.6 7.9 7.8 7.9 8.1 8.0 8.0 15 7.7 7.6 7.6 8.0 7.8 7-9 8.1 8.0 8.1 16 7-7 7.7 7.7 7.9 7.8 7.9 17 7.7 7.7 7.7 8.1 7.9 7.9 18 7.8 7-7 7.7 8.0 7.9 7.9 19 7.8 7-7 7.7 8.0 7.9 7-9 20 7.8 7.7 7.7 8.1 7.9 7.9 21 7.8 7.7 7.7 7.8 7.9 22 7.8 7.7 7.8 8.0 7.9 7-9 23 7.8 7-7 7.8 7.9 7.9 7-9 24 7.9 7.8 7.8 7.9 7.8 7.9 25 7.9 7.8 7.9 8.0 7.9 7.9 26 7.9 7.8 7.8 8.0 7.9 7.9 27 7.9 7.9 7.9 8.0 7-9 7.9 28 7-9 7.8 7.9 8.0 7.9 8.0 29 8.1 8.0 8.0 30 8.2 8.0 8.0 31 8.1 8.0 8.0 MONTH 7.9 7.5 7.7 5.2 7-9 195 MISSISSIPPI RIVER MAIN STEM 05331005 MISSISSIPPI RIVER AT INDUSTRIAL MOLASSES, ST. PAUL, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER

1 8.4 8.0 8.2 3 8.2 8.2 8.1 7.9 8.1 2 8.3 8.2 8.3 6 8.0 8.3 8.2 7.9 8.1 3 8.3 8.2 8.3 4 8.2 8.3 8.3 7.8 8.2 4 8.4 8.2 8.3 3 8.2 8.3 8.5 8.0 8.3 5 8.4 8.2 8.3 3 8.1 8.2 8.2 7.8 8.1 6 8.3 8.1 8.2 4 8.0 8.2 8.1 7.9 8.0 7 8.1 7.9 8.0 4 8.0 8.2 8.2 8.0 8.1 8 8.2 7.7 8.0 2 8.0 8.1 8.4 8.1 8.2 9 8.1 7.8 7.9 1 8.0 8.1 8.4 8.2 8.3 10 7.9 7.7 7.8 4 8.0 8.2 8.3 8.1 8.2

11 8.0 7.6 7.8 5 8.1 8.3 8.3 8.1 8.2 12 8.0 7.8 7.9 4 8.0 8.2 8.3 8.1 8.2 13 8.1 7.8 8.0 2 8.0 8.1 8.1 8.0 8.0 14 8.0 7.9 8.0 3 8.1 8.2 8.2 8.0 8.1 15 8.0 8.0 8.0 4 8.2 8.3 8.0 7.9 7.9

16 8.1 8.0 8.1 5 8.2 8.3 7.9 7-8 7.9 17 8.2 8.1 8.1 5 7.7 8.2 8.2 7.9 8.0 18 8.2 8.1 8.1 5 8.3 8.4 8.2 7.9 8.1 19 8.3 8.1 8.2 5 8.2 8.4 8.2 8.1 8.2 20 8.3 8.2 8.3 3 8.2 8.3 8.2 8.0 8.1 21 8.3 8.2 8.2 8.1 8.0 8.0 22 8.1 8.1 8.1 8.3 8.1 8.2 8.1 7.8 8.0 23 8.2 8.1 8.2 8.3 8.0 8.2 8.1 8.0 8.1 24 8.3 8.1 8.2 8.3 8.1 8.2 8.1 8.0 8.0 25 8.2 8.1 8.2 8.2 8.1 8.1 8.2 7.9 8.0 26 8.3 8.0 8.1 8.3 8.1 8.1 7.9 8.0 8.3 7.9 8.1 27 8.2 8.0 8.1 8.3 8.0 8.1 7.9 8.0 8.2 8.0 8.1 28 8.2 8.1 8.1 8.2 7.9 8.1 7.9 8.0 8.2 8.2 8.2 29 8.3 8.2 8.3 8.2 8.0 8.1 7.9 8.0 8.2 8.2 8.2 30 8.4 8.1 8.2 8.3 8.0 8.2 7.9 8.0 8.2 8.0 8.1 31 8.4 8.1 8.3 7.9 8.0 MONTH 8.4 7.6 8.1 S.I YEAR 8.6 7.4 TEMPERATURE WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 15.0 14.0 14.5 7.5 7.0 7.5 2.0 1.5 2.0 .5 .5 .5 2 14.0 13.0 13.5 7.0 6.5 7.0 1.5 1.0 1.5 .5 .5 .5 3 13.0 12.5 12.5 8.0 6.5 7.5 1.5 1.0 1.0 .5 .5 .5 4 12.0 11.5 12.0 8.0 7.5 8.0 1.0 .5 1.0 .5 .5 .5 5 11.5 11.5 11.5 8.5 8.0 8.0 1.0 .5 1.0 1.0 .5 .5 6 12.0 11.5 11.5 8.0 7.5 8.0 .5 .5 .5 1.0 1.0 1.0 7 12.0 11.5 12.0 7.5 7.0 7.5 1.0 .5 1.0 1.0 1.0 1.0 8 12.0 11.5 12.0 7-5 7.0 7.5 1.0 .5 1.0 1.0 1.0 1.0 9 12.0 11.5 12.0 7.0 6.5 7.0 1.0 1.0 1.0 1.0 1.0 1.0 10 12.0 11.5 11.5 6.5 6.0 6.0 1.0 1.0 1.0 1.0 1.0 1.0 11 12.0 11.5 11.5 6~Q 1.0 1.0 1.0 1.0 1.0 1.0 12 12.5 12.0 12.0 5.5 T.O 1.5 1.0 1.0 1.0 1.0 1.0 13 13.0 12.0 12.5 6.0 5.0 5.5 1.0 1.0 1.0 1.0 1.0 1.0 14 13.0 12.5 13.0 5.0 5.0 5.0 1.0 .5 1.0 1.0 1.0 1.0 15 13.5 13.0 13.0 5.5 5.0 5.5 1.0 .5 .5 1.0 1.0 1.0 16 13.0 12.5 13.0 6.5 5.5 6.0 1.0 .5 1.0 1.0 1.0 1.0 17 12.5 12.5 12.5 6.5 6.0 6.5 1.0 1.0 1.0 1.0 1.0 1.0 18 12.5 11.0 12.0 6.5 6.0 6.5 1.0 1.0 1.0 1.0 1.0 1.0 19 11.0 10.0 10.5 6.5 5.5 6.0 1.0 .5 1.0 1.0 .5 .5 20 10.0 9.5 9.5 5.0 4.0 4.5 1.0 .5 .5 .5 .5 .5 21 9-5 9.0 9.5 4.0 3.5 4.0 1.0 .5 1.0 .5 .5 .5 22 9.0 8.0 8.5 3.5 2.5 3.0 1.0 1.0 1.0 .5 .5 .5 23 7.5 7.0 7.0 2.5 1.5 2.0 1.0 .5 .5 .5 .5 .5 24 6.5 5.5 6.0 2.0 1.5 2.0 1.0 .5 .5 .5 .5 .5 25 5.5 4.5 5.0 2.0 1.5 2.0 .5 .5 .5 .5 .5 .5 26 5.0 4.5 4.5 2.5 2.0 2.0 .5 .5 .5 1.0 .5 .5 27 5.0 4.5 4.5 2.5 2.0 2.0 .5 .5 .5 1.0 1.0 1.0 28 5.5 4.5 5.0 2.0 1.5 2.0 .5 .5 .5 1.0 1.0 1.0 29 6.5 5.5 6.0 2.0 1.5 1.5 .5 .5 .5 1.0 1.0 1.0 30 7.0 6.0 6.5 2.0 1.5 1.5 .5 .5 .5 1.0 1.0 1.0 31 7.5 7.0 7-5 .5 .5 .5 1.0 1.0 1.0 MONTH 15.0 4.5 10.0 2.0 .5 1.0 1.0 .5 1.0 196 MISSISSIPPI RIVER MAIN STEM 05331005 MISSISSIPPI RIVER AT INDUSTRIAL MOLASSES, ST. PAUL, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 1.0 1.0 1.0 2.0 1.5 2.0 3.5 3.5 3.5 2 1.0 1.0 1.0 2.5 2.0 2.5 3.5 3.0 3.5 3 1.0 1.0 1.0 2.5 1.5 2.0 3.5 2.5 3.0 4 1.0 1.0 1.0 2.0 1.5 1.5 2.0 2.0 2.0 5 1.0 1.0 1.0 2.0 1.5 1.5 2.0 1.5 2.0 6 1.5 1.0 1.0 2.0 1.5 1.5 2.0 1.5 1.5 7 1.5 1.0 1.0 1.5 1.0 1-5 2.0 1.5 1.5 8 1.0 1.0 1.0 1.5 1.0 1.0 2.0 1.5 1.5 9 1.0 1.0 1.0 1.0 1.0 1.0 1.5 1.5 1.5 10 1.0 1.0 1.0 1.5 1.0 1.0 2.0 1.5 2.0 11 1.0 .5 1.0 2.0 1.0 1.5 2.5 1.5 2.0 12 .5 .5 .5 1-5 1.5 1.5 3.0 2.5 3.0 13 .5 .5 .5 3.0 1.5 2.0 4.0 3.0 3.5 14 .5 .5 .5 3-0 2.5 3-0 5.5 4.0 5.0 15 1.0 .5 .5 3.0 3.0 3.0 6.5 5.5 6.0 16 1.0 .5 1.0 3.0 2.5 3.0 17 1.5 .5 1.0 3-0 2.5 3.0 18 1.5 1.0 1.5 3.0 2.5 3.0 19 1.5 1.0 1.5 3.0 2.5 3-0 20 2.0 1.5 1.5 2.5 2.0 2.0 21 2.0 1.5 1.5 2.5 1.5 2.0 22 2.0 1.0 1.5 3-0 1.5 2.0 23 2.0 1.5 1.5 3-5 2.0 2.5 24 1.5 1.0 1.0 3.0 2.0 2.5 25 1.5 1.0 1.0 3.0 2.5 3.0 26 1.5 1.0 1.5 3.0 2.5 2.5 27 1.5 1.0 1.5 3.0 2.0 2.5 28 2.0 1.5 1.5 3.5 2.5 3.0 29 —— —— —— 3.5 3.0 3.5 30 —— —— —— 3-5 3.0 3-5 31 —— —— —— 4.0 3-0 3.5 MONTH 2.0 .5 1.0 4.0 1.0 2.5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER

1 23.0 22.5 22.5 26.0 25.5 25.5 20.0 19.5 20.0 2 23.0 22.5 23-0 27.0 25.5 26.0 20.0 19.5 20.0 3 23.5 22.5 23.0 27.5 26.0 27.0 20.5 19.5 20.0 4 24.5 23.5 24.0 27.5 27.0 27.5 21.0 20.0 20.5 5 26.0 24.5 25-0 28.0 28.0 28.0 21.0 19.5 20.5

6 26.0 24.0 25.0 28.5 28.0 28.5 19-5 19.0 19.5 7 24.5 23.5 24.0 28.5 28.0 28.0 19.0 19.0 19.0 8 24.0 23.0 23.5 28.0 26.5 27.0 19.0 18.5 18.5 9 23.5 23-0 23-0 26.0 24.5 25.5 19.0 18.0 18.5 10 23.0 22.0 23-0 24.5 21.5 23.iO 19.0 18.5 19.0

11 22.0 21.5 21.5 22.0 21.0 21.5 20.5 19.0 19.5 12 22.0 21.0 21.5 21.5 20.5 21.0 21.0 20.0 20.5 13 25.0 22.0 24.0 21.0 20.0 20.5 21.0 20.0 20.5 14 25.0 24.5 25.0 21.0 20.0 21.0 20.0 19.0 19.5 15 25.5 25.0 25.0 21.5 20.5 21.0 19.0 17.5 18.0

16 25.5 25.0 25.5 21.5 21.0 21.5 17.5 16.0 16.5 17 26.0 25.5 25.5 24.0 21.5 23.0 16.5 16.0 16.5 18 26.5 25.5 26.0 24.5 24.0 24.5 16.5 15.5 16.0 19 26.5 26.0 26.0 25.5 24.0 25.0 16.5 16.0 16.5 20 26.5 26.0 26.0 24.5 24.0 24.0 16.5 16.0 16.0 21 27.0 26.0 26.5 16.0 16.0 16.0 22 19.0 19.0 19.0 27-0 26.0 26.5 16.0 15.5 16.0 23 19.5 19.0 19.5 27.5 26.5 27.0 16.5 15.5 16.0 24 20.0 19.5 20.0 27.0 26.5 27.0 16.5 16.0 16.5 25 20.5 19.5 20.0 27.0 26.5 26.5 16.5 16.0 16.5 26 20.5 20.0 20.5 26.5 25.5 26.0 21.0 21.0 21 JO 16.5 16.0 16.5 27 21.5 20.5 21.0 26.0 25.5 26.0 20.5 20.0 20J5 16.0 16.0 16.0 28 22.0 21.5 22.0 26.0 25.5 26.0 20.0 19.0 19J5 16.5 16.0 16.0 29 24.0 22.0 23.0 26.0 25.5 26.0 19.5 19.0 19^0 17.5 16.5 17.0 30 23.0 22.5 22.5 26.0 25-5 26.0 19.5 18.5 19.0 17.5 16.0 16.5 31 26.0 25.5 26.0 20.5 19.0 20.0 MONTH 27.5 21.0 25.0 21.0 15.5 18.0 YEAR 28.5 MISSISSIPPI RIVER MAIN STEM 197 05331005 MISSISSIPPI RIVER AT INDUSTRIAL MOLASSES, ST. PAUL, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

OCTOBER NOVEMBER DECEMBER JANUARY 1 10.0 9.2 9.6 12.6 12.2 12.4 13.3 12.9 13.1 13.2 13.0 13.1 2 11.2 9.4 10.2 12.8 12.1 12.4 13.2 13.0 13.1 13.0 ' 12.7 12.9 3 11.6 10.8 11.2 12.5 11.7 12.2 13.1 12.9 13.0 12.6 12.4 12.6 4 11.2 10.6 10.9 11.8 11.3 11.6 13.0 12.9 12.9 12.3 12.1 12.2 5 11.7 10.7 11.1 11.3 10.8 11.0 12.9 12.8 12.8 12.1 10.8 11.5 6 11.6 10.5 11.1 11.6 10.4 11.0 13.2 12.9 13.1 12.3 12.0 12.1 7 11.6 10.5 11.0 11.5, 11.2 11.3 12.9 12.7 12.8 13.0 12.6 12,8 8 11.9 10.9 11.4 11-3 11.1 11.2 12.7 12.6 12.6 13.0 12.9 12.9 9 11.6 10.7 11.1 11.6 11.1 11.4 12.7 12.5 12.6 12.3 12.0 12.1 10 10.9 10.5 10.7 12.3 11.3 11.6 12.9 12.7 12.8 12.3 12.0 12.1 11 11.2 10.2 10.7 13.1 12.8 12.9 12.5 12.1 12.4 12 10.9 10.2 10.5 13.5 13.2 13.3 13.4 13.0 13.2 12.3 11.9 12.0 13 10.1 8.9 9.6 13.5 13.0 13.2 13.1 13.0 13.1 12.2 11.8 11.9 IH 9-6 9.0 9.4 13.3 12.9 13.1 13.2 13.1 13.2 12.4 12.0 12.2 15 9.7 9.2 9.4 13.0 12.5 12.8 13.4 '13.1 13.2 12.1 11.7 11.9 16 11.5 9.3 10.1 12.5 12.0 12.2 13.3 13-1 13.2 11.8 11.5 11.7 17 10.7 9.8 10.2 12.2 11.7 12.0 14.4 13.1 13.8 12.0 11.6 11.9 18 10.0 9.6 9.9 11.9 11.4 11.6 14.4 14.1 14.2 12.2 11.3 11.7 19 10.4 9.8 10.1 11.5 11.1 11.3 14.4 13.9 14.2 13.1 12.2 12.7 20 12.1 10.1 11.1 11.5 11.2 11.4 14.6 14.1 14.3 12.5 12.2 12.4 21 11.7 11.4 11.5 12.0 11.5 11.8 14.5 14.1 14.3 12.7 12.3 12.5 22 11.9 11.5 11.6 12.4 12.1 12.3 14.3 13.5 13.9 12.6 12.3 12.5 23 11.8 11.7 11.7 12.8 12.4 12.7 13.5 13.2 13.3 12.7 12.2 12.5 24 12.1 11.8 11.9 13.0 12.8 12.9 13.5 13.1 13.3 12.5 11.9 12.2 25 12.2 11.8 12.0 13.1 12.7 12.9 13.3 13.0 13.2 12.8 12.2 12.5 26 12.1 11.9 12.0 13.0 12.7 12.8 13.1 12.9 13.0 12.9 12.4 12.7 27 14.2 11.8 13.0 12.8 12.5 12.7 12.9 12.7 12.8 12.9 12.6 12.7 28 14.0 13.4 13.8 12.9 12.7 12.8 12.8 12.7 12.8 12.5 12.2 12.3 29 13.4 12.8 13.2 13.2 12.9 13.1 13.0 12.8 12.9 12.9 12.3 12.6 30 13.3 12.7 12.9 13. 4 13.1 13.2 13.2 12.9 13.1 12.5 12.0 12.3 31 12.9 12.5 12.7 13.4 13.0 13.2 12.6 12.0 12.4 MONTH 14.2 8.9 11.2 14.6 12.5 13.2 13.2 12.3

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY

1 12.8 12.3 12.5 11.7 11.6 11.6 12.2 12.1 12.1 2 12.6 12.3 12.4 11.7 11.6 11.6 12.4 12.1 12.2 3 12.6 12.3 12.4 11.6 11.3 11.5 12.1 11.8 12.0 4 12.6 12.3 12.4 12.5 11.3 11.7 12.3 12.0 12.2 5 12.6 11.8 12.2 12.3 11.6 12.1 12.8 12.1 12.5

6 12.4 11.7 12.0 12.1 11.8 11.9 13.0 12.7 12.8 7 12.3 11.7 11.9 12.3 11.9 12.1 12.8 12.7 12.7 8 12.3 11.7 11.9 12.2 11.9 12.0 14.0 12.6 13.5 9 12.5 11.8 12.1 12.2 11.6 11.9 13.8 13.7 13.7 10 12.1 11.8 11.9 12.1 11.6 11.9 13.8 13.6 13.7

11 12.8 11.9 12.3 12.2 11.7 12.0 13.9 13.6 13.7 12 12.6 11.9 12.1 11.9 11.7 11.8 13.7 13, 13.3 13 11.9 11.5 12.7 11.6 11.3 11.4 13.4 13, 13.3 14 11.8 11.5 11.6 11.4 11.1 11.2 13.4 13, 13.3 15 11.6 11.2 11.4 11.6 11.2 11.3 13.3 13.1 13.2

16 11.3 10.9 11.1 11.5 11.2 11.4 17 11.1 10.8 11.0 11.6 11.2 11.3 18 11.4 11.0 11.1 11.6 11.3 11.4 19 11.9 11.0 11.4 11.5 11.3 11.4 20 12.0 11.6 11.8 11.4 11.2 11.3

21 12.7 11.5 12.2 11.5 11.2 11.4 22 12.8 12.5 12.6 11.5 11-3 11.4 23 12.9 12.1 12.5 11.8 11.3 11.5 24 12.6 12.0 12.4 11.5 11.2 11.4 25 12.8 12.5 12.7 11.7 11.4 11.6

26 12.7 12.6 12.J 11.9 11.5 11.7 27 12.9 12.3 12.6 12.0 11.7 11.9 28 12.3 11.8 12.2 12.2 11.9 12.0 29 12.2 12.0 12.1 30 12.2 12.0 12.1 31 12.3 12.0 12.1 MONTH 12.9 12.1 12.5 11.1 11.7 198 MISSISSIPPI RIVER MAIN STEM 05331005 MISSISSIPPI RIVER AT INDUSTRIAL MOLASSES, ST. PAUL, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 ___ —— —— 8.9 8.0 8.4 8.1 7-3 7.6 9.7 7.8 8.7 2 —— —— —— 8.7 8.0 8.3 7.3 6.7 6.9 9-7 . 8.5 9.3 3 —— —— —— 8.5 7.7 8.2 6.7 6.2 6.4 10.2 8.6 9.6 4 —— —— —— 8.9 7.9 8.4 7-5 6.3 7.0 10.2 8.6 9.4 5 —— —— —— 8.7 7.9 8.3 7.6 7.0 7.3 9.0 7.8 8.4 6 —— —— —— 8.0 7.3 7.6 8.9 6.9 7.7 8.2 7.8 8.0 7 —— —— —— 7.5 6.7 7.0 8.4 7.6 8.0 8.0 7.9 7-9 8 —— —— —— 6.9' 6.5 6.7 7.8 7.3 7.5 8.2 7.2 7.5 9 —— —— —— 7.4 6.4 6.9 8.1 7.6 7.8 8.5 7.6 7.9 10 —— —— —— 7.3 5.9 6.4 8.7 7.8 8.2 9.2 7.4 8.2 11 —— —— —— 6.5 5.7 6.2 8.9 8.1 8.5 8.7 7.4 8.2 12 —— —— —— 6.9 6.4 6.7 8.3 8.2 8.2 8.3 7.4 7.8 13 —— —— —— 7.3 6.3 6.9 7.6 6.4 7.1 8.1 7-5 7.7 14 —— —— —— 7.3 6.5 ' 6.8 7.0 6.0 6.4 8.3 7.7 8.0 15 —— —— —— 6.8 6.4 6.6 6.4 5.6, 6.0 8.3 7.6 8.0 16 —— —— —— 7.5 6.2 6.8 8.2 5.7 7.0 8.3 8.1 8.2 17 —— —— —— 7.5 7.2 7.3 7.6 5.9 6.5 8.4 7.9 8.2 18 —— —— —— 7.4 6.8 7.1 7.9 6.1 6.8 8.6 8.0 8.3 19 —— —— —— 7.7 6.7 7.2 7.0 6.5 6.8 8.7 8.3 8.5 20 —— —— —— 7.7 7.2 7.5 6.7 6.0 6.3 9-5 8.4 8.8 21 —— —— —— 7.6 6.8 7.1 —— —— —— 9.0 8.7 8.8 22 8.3 8.2 8.3 7.0 6.6 6.8 —— —— —— 9-1 8.8 9.0 23 8.5 8.0 8.3 7.0 6.6 6.8 —— —— —— 9.0 8.6 8.8 24 8.5 7.7 8.2 6.8 6.5 6.6 —— —— —— 10.1 8.6 9.4 25 9.3 8.0 8.5 6.6 6.2 6.5 —— —— —— 10.4 9-8 10.1 26 9.4 8.7 9.1 7.2 5-9 6.6 7.7 6.9 7.2 11.1 10.4 10.7 27 9.5 8.8 9.1 7.1 7.0 7.1 7.4 6.7 6.9 11.0 10.2 10.7 28 9.6 8.2 8.9 7.3 7.1 7.2 6.9 6.0 6.3 10.7 10.4 10.6 29 9.1 8.0 8.4 7.3 6.8 7.0 7.0 6.0 6.4 11.0 10.4 10.7 30 8.7 8.0 8.3 8.3 6.8 7-7 8.8 6.5 7.7 10.5 10.3 10.4 31 —— —— —— 8.3 7.8 8.0 9.1 7.8 8.3 MONTH 8.9 5.7 7.2 11.1 7.2 8.9 YEAR 14.6 5.6 MISSISSIPPI RIVER MAIN STEM 199

05331545 MISSISSIPPI RIVER AT FIFTH STREET AT NEWPORT, MN LOCATION.—Lat 44°51'37", long 93°00'24", in NEJNEJ sec.2, T.27 N., R.22 W., Washington County, Hydrologic Unit 07010206, on left bank at the end of Fifth Street, and at mile 830.6 (1,337 tan) upstream from Ohio River. PERIOD OF RECORD.—December 1978 to current year. PERIOD OF DAILY RECORD.— SPECIFIC CONDUCTANCE: December 1978 to current year pH: December 1978 to current year. WATER TEMPERATURES: December 1978 to current year. DISSOLVED OXYGEN: December 1978 to current year. INSTRUMENTATION.—Water-quality monitor since December 1978. REMARKS.—Water is pumped to a monitor that is inside a heated shelter. Extremes are published for those years with 80 percent or more days of record. COOPERATION.—Water-quality monitor is operated by the Metropolitan Waste Control Commission, St. Paul, Minn. EXTREMES FOR PERIOD OF DAILY RECORD.— SPECIFIC CONDUCTANCE (water year 1981): Maximum, 763 micromhos Sept. 11, 1981; minimum, 288 micromhos Mar. 2, 1981. pH: (water year 198l): Maximum, 8.6 units Apr. 18, 1981] minimum, 7.3 units June 28, 29, 1981. WATER TEMPERATURES (water year 1981): Maximum, 27-5°C July 10, 1981; minimum, 0.0°C Jan 13. 1981. DISSOLVED OXYGEN (water year 1981): Maximum, 15.7 mg/L Mar. 25, 1981; minimum, 4.1 mg/L Apr. 20, 28, 1981.

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEQ. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 493 470 481 568 519 539 2 482 463 473 581 542 561 3 559 508 547 4 465 461 463 551 523 537 5 474 456 465 541 513 530 6 470 463 467 529 481 501 7 476 457 467 571 492 526 8 451 438 442 477 448 462 613 550 568 9 467 428 448 472 453 463 632 613 618 10 448 468 11 462 420 435 498 476 487 610 600 606 12 461 434 451 482 477 479 635 579 610 13 450 427 439 505 499 502 630 606 620 14 469 414 443 518 501 506 643 615 622 15 476 425 467 512 502 507 682 644 667 16 467 449 457 511 501 506 662 618 646 17 471 407 439 513 505 509 643 632 638 18 443 407 424 495 470 482 19 419 395 406 479 456 467 20 437 421 432 509 496 502 21 432 407 419 508 480 494 22 444 419 431 511 489 500 23 461 441 448 475 467 471 24 452 430 439 502 498 500 25 461 436 446 522 508 515 26 454 423 439 535 500 521 27 464 418 437 527 498 509 28 528 488 506 29 503 474 490 515 501 507 30 497 466 476 532 512 522 31 488 423 472 200 MISSISSIPPI RIVER MAIN STEM 05331545 MISSISSIPPI RIVER AT FIFTH STREET AT NEWPORT, MN—Continued SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981'TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY . 1 497 485 488 608 514 543 —— —— —— 2 567 487 542 631 483 505 —— —— —— 3 586 560 574 654 456 471 —— —— —— 4 635 587 615 612 450 471 5 635 625 630 471 443 455 —— —— —— 6 671 612 655 564 439 484 7 621 568 588 8 607 561 585 —— —— —— —— —— —— 9 593 560 578 10 582 538 564 —— —— —— —— 11 620 562 581 —— —— —— —— —— —— 12 633 493 594 —— —— —— 449 411 419 13 617 538 569 —— —— —— 441 421 428 14 613 526 589 —— —— —— 448 431 438 15 604 579 559 —— —— —— 458 416 424 16 610 597 603 —— —— —— 439 403 416 17 612 564 583 —— —— —— 442 415 424 18 580 497 518 —— —— —— 440 419 423 19 —— —— —— —— —— —— 424 406 415 20 —— —— —— —— —— —— 407 382 391 21 483 459 472 —— —— —— 388 371 378 22 478 450 461 —— —— —— 407 389 399 23 518 476 497 —— —— —— 423 397 403 24 549 529 540 —— —— —— 439 407 420 25 546 530 537 26 550 529 539 —— —— —— 514 320 478 27 565 536 546 —— —— —— 487 471 478 28 577 546 558 —— —— —— 498 425 487 29 569 555 561 —— —— —— 512 490 500 30 566 510 529 —— —— —— 512 494 503 31 —— —— —— —— —— —— 522 486 506

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 532 493 510 563 537 554 650 615 625 547 464 518 2 555 523 539 559 532 542 655 600 '623 523 488 507 3 551 524 538 556 523 537 642 585 594 539 514 530 4 570 512 559 543 527 533 591 543 573 546 463 516 5 577 510 566 556 519 532 693 591 666 489 462 476 6 602 582 592 577 505 550 714 639 666 500 469 489 7 638 531 605 519 503 511 —— —— —— 520 490 506 8 638 597 628 512 493 502 —— —— —— 559 515 534 9 616 554 593 519 501 511 —— —— —— 546 469 513 10 597 569 577 532 492 512 —— —— —— 524 443 490 11 638 585 601 477 445 461 —— —— —— 523 444 479 12 —— —— —— 539 498 519 —— —— —— 500 476 485 13 604 569 584 547 534 541 —— —— ,—— 504 451 487 14 607 555 572 551 503 527 539 482 '510 493 459 474 15 578 556 563 522 489 505 593 524 564 509 479 491 16 596 569 579 548 523 535 589 554 573 17 629 597 613 564 551 558 602 527 570 —— —— —— 18 626 596 611 561 557 559 562 521 535 19 617 605 611 598 562 575 579 531 |558 20 619 588 604 639 591 615 589 568 580 —— —— —— 21 599 572 586 679 620 645 577 546 562 502 500 500 22 600 593 597 722 680 701 581 562 572 512 473 492 23 624 620 622 715 6l8 666 570 522 542 530 505 511 24 640 622 631 599 591 595 589 549 562 543 519 532 25 618 609 613 655 641 648 597 472 542 546 488 518 26 625 597 609 651 614 632 599 493 539 535 498 527 27 631 598 609 670 628 649 592 496 544 538 512 525 28 604 583 592 672 654 663 542 509 527 543 485 513 29 622 569 595 675 653 664 522 459 497 511 492 502 30 560 546 553 —— —— —— 479 414 454 522 479 493 31 —— —— —— —— —— —— 558 454 '491 —— —— 201 MISSISSIPPI RIVER MAIN STEM 05331545 MISSISSIPPI RIVER AT FIFTH STREET AT NEWPORT, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY. 1 —— —— —— 7.9 7.8 7.9 7.7 7.6 7.7 2 —— —— —— 7.9 7.9 7.9 7.8 7.7 7.7 3 —— —— —— 8.0 7-9 7.9 7.7 7.7 7.7 4 —— —— —— 7.9 7.9 7.9 7.7 7.7 7.7 5 —— —— —— 7.9 7.9 7.9 7.8 7.7 7.7 6 —— —— —— 8.0 7-9 7.9 7.8 7.7 7.7 7 —— —— —— 8.0 7.9 7.9 7.8 7.7 7.7 8 8.3 8.2 8.2 8.0 7-9 8.0 7-7 7-7 7.7 9 8.3 8.2 8.3 8.0 7-9 8.0 7.7 7.6 7.6 10 8.8 8.2 8.3 8.0 8.0 8.0 7.8 7.7 7.8 11 8.5 8.3 8.4 8.1 8.1 8.1 7.8 7.7 7.7 12 8.4 8.3 8.3 8.1 7.9 8.0 7.8 7.7 7.8 13 8.4 8.2 8.3 7.9 7-9 7.9 7.8 7.7 7.8 14 8.3 8.1 8.2 7.9 7.9 7-9 7.9 7.8 7.8 15 8.4 8.1 8.1 7.9 7.8 7-9 7.8 7.7 7.8 16 8.1 8.1 8.1 8.0 7-8 7-9 7.8 7-7 7.7 17 8.3 8.1 8.1 7.9 7.8 7.9 7.8 7.6 7-7 18 8.2 8.1 8.2 7.9 7.8 7.9 7-9 7.8 7.8 19 8.2 8.2 8.2 7.9 7-8 7.9 7.9 7.8 7.8 20 8.3 8.0 8.2 8.0 7-9 7.9 7.8 7.8 7.8 21 8.0 8.0 8.0 8.3 7.9 8.0 7.8 7.8 7.8 22 8.1 8.0 8.0 8.0 7-9 8.0 7-8 7.7 7.8 23 8.1 8.0 8.0 8.4 7-9 8.0 7.8 7.7 7.8 24 8.3 8.0 8.0 8.0 7.8 7-9 7-7 7.7 7-7 25 8.1 8.0 8.1 7.8 7.8 7.8 7-7 7-7 7-7 26 8.1 8.0 8.1 7.8 7.7 7.7 7.8 7.6 7.6 27 8.2 8.0 8.1 7.9 7-8 7.8 7.6 7.6 7.6 28 —— —— —— 7.8 7.7 7.8 7-6 7.5 7-5 29 7.9 7.9 7.9 7-9 7-7 7.8 7.6 7.4 7.5 30 7.9 7.9 7.9 7-9 7-7 7.8 7.5 7-5 7.5 31 8.0 7.9 7-9 —— —— —— 7.8 7.5 7.6 MONTH 8.4 7.7 7.9 7.9 7.4 7.7

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 —— —— —— 8.1 8.1 8.1 8.0 7.9 8.0 2 8.0 7.6 7.7 8.1 8.0 8.0 8.0 8.0 8.0 —— —— —— 3 —— —— —— 8.1 8.0 8.0 8.0 7.9 8.0 H —— —— —— 8.0 8.0 8.0 8.0 7.9 8.0 5 7.9 7.0 7.8 8.1 8.0 8.1 8.0 8.0 8.0 —— —— —— 6 —— —— —— 8.1 8.0 8.1 8.0 7.9 8.0 7 7.9 7.8 7.8 8.1 8.0 8.0 —— —— —— —— —— —— 8 —— —— —— 8.1 8.0 8.1 —— —— —— —— —— —— 9 —— —— —— 8.1 8.0 8.0 —— —— —— —— —— —— 10 —— —— —— 8.1 7.9 8.0 —— —— —— —— —— —— 11 —— —— —— 8.1 8.0 8.1 —— —— —— 8.2 7.6 8.0 12 —— —— —— 8.1 8.0 8.0 —— —— —— 8.3 7.2 8.2 13 7.8 7.4 7.6 8.2 8.1 8.1 —— —— —— 8.2 8.0 8.1 14 7.7 7.4 7.5 8.1 8.0 8.1 —— —— —— 8.1 8.0 8.0 15 —— —— —— 8.0 8.0 8.0 —— —— —— 8.1 7.6 8.0 16 —— —— —— 8.0 8.0 8.0 —— —— —— 8.3 8.0 8.0 17 —— —— —— 8.0 8.0 8.0 —— —— —— 8.1 8.0 8.0 18 8.0 8.0 8.0 8.0 7.9 8.0 —— —— —— 8.0 8.0 8.0 19 —— —— —— 8.0 8.0 8.0 —— —— —— —— —— —— 20 8.0 7.9 7.9 8.0 8.0 8.0 —— —— —— 8.2 8.2 8.2 21 8.0 7.9 7.9 8.1 8.0 8.0 —— —— —— 8.2 8.2 8.2 22 8.0 8.0 8.0 8.1 7.9 8.0 —— —— —— 8.2 8.2 8.2 23 8.0 8.0 8.0 8.0 8.0 8.0 —— —— —— 8.2 8.2 8.2 24 8.0 8.0 8.0 8.0 8.0 8.1 —— —— —— 8.2 8.2 8.2 25 8.1 7.9 8.0 8.1 8.0 8.5 26 8.1 8.0 8.0 8.0 8.0 8.0 —— —— —— 8.2 8.0 8.1 27 8.1 8.0 8.0 8.2 8.1 8.1 —— —— —— 8.1 8.0 8,1 28 8.1 8.0 8.0 8.1 8.1 8.3 —— —— —— 8.2 8.0 8.1 29 —— —— —— 8.2 8.1 8.1 —— —— —— 8.1 8.0 8.1 30 —— —— —— 8.4 8.0 8.1 —— —— —— 8.1 8.1 8.1 31 —— —— —— —— —— —— —— —— —— 8.2 8.0 8.1 MONTH 8.4 7-9 8.1 202 MISSISSIPPI RIVER MAIN STEM 05331545 MISSISSIPPI RIVER AT FIFTH STREET AT NEWPORT, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 8.2 7.9 8.1 8.2 8.1 8.2 2 8.2 8.2 8.0 7.9 8.0 2 8.2 8.1 8.1 8.2 7.9 8.2 3 8.2 8.2 8.1 8.0 8.0 3 8.1 8.0 8.1 8.2 8.1 8.2 3 8.1 8.2 8.2 8.0 8.1 4 8.1 7.9 8.1 8.2 8.1 8.2 2 8.2 8.2 8.3 8.1 8.2 5 8.1 8.0 8.1 8.2 8.2 8.2 2 8.1 8.1 8.3 8.2 8.3 6 8.1 8.1 8.1 8.2 8.0 8.1 2 8.1 8.1 8.3 8.1 8.2 7 8.2 8.1 8.1 8.2 8.0 8.1 2 8.1 8.1 8.2 8.2 8.2 8 8.2 8.1 8.1 8.0 7.9 7-9 2 8.1 8.1 8.2 8.0 8.1 9 8.2 8.1 8.1 2 8.1 8.2 8.2 8.1 8.2 10 8.2 8.1 8.2 2 8.0 8.1 8.2 8.1 8.2 11 8.2 8.1 8.2 0 8.0 8.0 8.2 8.1 8.2 12 8.2 8.1 8.1 &~0 2 8.0 8.0 8.2 8.0 8.1 13 8.2 8.1 8.1 7.9 7.9 2 8.0 8.0 8.2 8.1 8.2 14 8.2 8.1 8.1 7-9 7.8 7.8 0 7.9 8.0 8.2 8.1 8.2 15 8.2 8.1 8.1 7.9 7.8 7.8 0 7.9 8.0 8.2 7.9 8.1 16 8.2 8.1 8.2 7-9 7.8 7.9 0 7.9 8.0 17 8.2 8.1 8.2 8.0 7.9 8.0 2 7.9 8.0 18 8.2 8.1 8.1 8.0 7.9 8.0 2 8.1 8.1 19 8.2 8.1 8.1 8.0 8.0 8.0 2 8.1 8.1 20 8.2 8.0 8.1 8.1 8.0 8.0 2 8.1 8.1 21 8.2 8.0 8.0 8.1 7.9 8.0 2 8.1 8.1 7.9 7.9 7.9 22 —— —— —— 8.1 8.0 8.0 2 8.1 8.1 8.0 7.9 7.9 23 8.1 8.0 8.0 8.0 7-9 8.0 2 8.0 8.1 8.0 7.9 7.9 24 8.0 7.9 8.0 8.1 7.9 8.0 1 7.9 8.0 8.0 7.9 8.0 25 8.0 7.8 7.9 8.0 7-9 8.0 0 7.9 8.0 8.0 7.9 7.9 26 7.8 7.8 7.8 8.0 7.9 8.0 0 7.9 8.0 8.0 7.9 7.9 27 7.9 7.8 7.8 8.1 7.9 8.0 ,0 7.9 7.9 8.0 7.9 7.9 28 8.2 7.7 8.0 8.0 8.0 8.0 0 7.9 7.9 8.1 7.9 8.0 29 8.2 8.0 8.1 8.0 8.0 8.0 ,1 7.9 8.0 8.1 8.1 8.1 30 8.2 7.8 8.2 8.1 8.0 8.1 1 7.9 8.0 8.1 8.0 8.0 31 —— —— —— 8.3 8.1 8.2 ,1 7.9 8.0 MONTH 7-9 J.I

TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 1.5 1.5 1.5 2 1.5 1.0 1.0 3 1.5 1.0 1.0 4 7-0 7.0 7.0 1.0 1.0 1.0 5 7.0 7.0 7.0 1.0 .5 1.0 6 7.0 7.0 7.0 1.0 .5 1.0 7 7.0 6.5 7.0 1.0 1.0 1.0 8 12.0 12.0 12.0 7-0 6.5 6.5 1.0 1.0 1.0 9 12.0 11.5 12.0 6.5 6.0 6.5 1.0 1.0 1.0 10 12.0 11.5 12.0 7.0 6.0 6.5 1.0 .5 1.0 11 12.0 11.5 12.0 6.0 6.5 6.5 1.0 1.0 1.0! 12 12.0 11.5 12.0 5.0 5.0 6.0 1.0 1.0 1.0 13 12.5 12.0 12.5 5.0 5.0 5.5 1.0 • i.o 1.0 14 12.5 12.5 12.5 1.0 .5 .5 15 13.0 12.0 12.5 1.0 .5 .5 16 12.5 12.0 12.5 1.0 .5 .5 17 12.0 12.0 12.0 8.0 5.5 6.0 1.0 .5 1.0 18 11.5 10.5 11.0 6.5 6.0 6.5 1.0 1.0 1.0 19 10.5 10.0 10.0 6.0 5.5 6.0 1.0 1.0 1.0 20 10.0 9.5 10.0 5.5 5.0 5.0 1.0 .5 1.0 21 9.0 9.0 9.0 5.0 4.5 5.0 1.0 1.0 1.0 22 11.0 7.5 8.0 4.5 4.0 4.0 1.0 1.0 1.0 23 7.5 6.5 7.0 5-5 3.0 3.5 1.0 1.0 1.0 24 9.0 5.5 6.0 3.5 3.5 3.5 1.0 .5 I.O 1 25 5.5 4.5 5.0 3.0 3.0 3.0 1.0 .5 1.0 26 4.5 4.0 4.0 3.0 3.0 3.0 1.0 .5 1.0 27 5.5 4.0 5.0 3-0 2.5 2.5 1.0 .5 1.0 28 2.5 2.0 2.5 1.0 .5 .5 29 6.5 5.5 6.5 2.0 2.0 2.0 1.0 .5 .5 30 7.0 6.5 7.0 2.0 1.5 2.0 .5 .5 .5 31 7.5 6.5 7-5 1.0 .5 .5 MONTH 1.5 .5 1.0 203 MISSISSIPPI RIVER MAIN STEM 05331545 MISSISSIPPI RIVER AT FIFTH STREET AT NEWPORT, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX WIN MEAN FEBRUARY MARCH APRIL MAY

2.0 2.0 2.0 4.0 2.5 4.0 1.5 .5 1.0 2.5 2.5 2.5 4.0 2.5 4.0 1.0 .5 .5 2.5 2.0 2.5 4.0 3.0 4.0 .5 .5 .5 2.5 2.0 2.0 4.0 3.0 3.5 .5 .5 .5 2.0 1.5 2.0 3.5 3.5 3.5

.5 .5 .5 2.0 1.5 2.0 3.5 2.5 3.0 .5 .5 .5 2.5 1.5 1.5 2.0 1.5 1.5 .5 .5 .5 1.5 1.5 1.5 1.5 1-5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 10 2.0 1.5 1.5 1.5 1.5 1.5

11 2.5 1.0 1.0 2.0 1.5 2.0 12 2.5 1.0 1.5 2.0 1.5 2.0 16.5 16.0 16.5 13 1.5 1.0 1.0 2.5 2.0 2.0 16.0 16.0 16.0 14 1.5 1.0 1.5 3.0 2.0 2.5 16.5 16.0 16.5 15 2.0 1.0 1.5 3.0 2.5 3.0 17.0 16.0 16.5

16 2.0 1.5 1.5 3.0 2.0 3.0 17.0 16.5 17.0 17 3.0 2.5 3.0 17.0 17.0 17.0 18 2.0 1.0 1.5 3.0 2.5 3.0 17.0 17.0 17.0 19 3.0 2.5 2.5 17.5 16.5 17.0 20 3.0 2.5 2.5 17.5 17.0 17.0

21 2.5 2.0 2.5 17.0 16.5 16.5 22 2.0 1.5 2.0 2.5 2.0 2.5 16.5 16.0 16.5 23 2.0 1.5 2.0 2.5 2.0 2.5 17.0 16.0 16.5 24 2.0 1.5 1.5 2.0 1.5 2.0 17.0 16.0 16.5 25 1.5 1.5 1.5 2.5 2.0 2.0 20.5 18.0 19.0

26 2.0 1.5 1.5 2.5 1.5 2.0 19.5 16.5 17.5 27 2.0 1.5 2.0 2.5 2.0 2.0 17.0 16.5 16.5 28 2.0 1.5 2.0 2.5 2.0 2.0 17.5 16.5 17.0 29 2.5 2.5 2.5 18.5 17.0 17.5 30 3.5 2.0 3.5 19.5 17.5 18.0 31 18.0 16.5 18.0 MONTH 3.5 1.5 2.5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER

1 18.0 16.5 17.5 22.0 21.5 22.0 26.5 26.0 26.0 22.0 20.0 20. 2 17.5 17.0 17.5 22.0 21.5 22.0 26.5 26.0 26.0 21.0 20.5 20. 3 17.5 17.0 17.0 22.5 21.5 22.0 27.0 26.0 26.5 22.5 20.5 21.0 4 18.0 17.0 17.0 23.0 22.5 22.5 27.5 26.5 27.0 21.0 20.5 20.5 5 17.5 17.0 17.0 23.5 22.5 23.0 27.5 27.0 27.5 21.0 21.0 21.0

6 17.5 17.0 17.5 23.5 23.0 23.5 28.0 27.0 27.5 21.0 20, 21.0 7 17.5 17.0 17.0 24.0 23.0 23.5 28.0 27.5 27.5 20.5 18. 20.0 8 17.5 17.0 17.0 23.5 23.0 23.5 27.5 27.0 27.0 18.5 18. 18.5 9 17. 17.5 17.5 23.0 22.5 23.0 26.5 25.5 26.0 19.0 18, 18.5 10 17.5 17.0 17.0 23.5 22.5 23.0 25.5 25.0 25.5 19.0 18, 18.5

11 17.5 17.0 17.5 22.5 22.0 22.5 25.0 24.5 24.5 20.0 19.0 19.0 12 22.5 21.5 22.0 27.5 24.0 24.5 20.0 19-5 19.5 13 18.0 17.5 17-5 23.0 22.0 22.5 26.0 23.0 23.5 20.0 19-5 19.5 14 23.0 22.5 23.0 23.5 23.0 23.0 19-5 19.0 19.0 15 18~5 18.0 23.0 22.5 23.0 23.5 23.0 23.5 19.0 18.0 18.5

16 19.0 18.0 18.5 23.0 22.5 23.0 24.0 23.0 23.5 18.0 17.5 17.5 17 19. 18.5 19.0 23.5 23.0 23.5 24.0 22.5 23.0 17.5 17.0 17.0 18 19. 18.5 19.0 24.0 23-0 23.5 23.0 22.5 22.5 17.0 16.5 16.5 19 19.0 18.5 18, 23.5 23.0 23.5 24.0 23.0 23.5 17.0 16.5 16.5 20 18.5 18.0 25.5 23.0 24.0 24.5 23.0 24.0 16.5 16.0 16.5

21 18.5 18.0 18.5 26.0 25.5 25.5 24.5 23.5 24.0 16.5 16.0 16.0 22 19.0 18.0 18.5 26.0 25.0 25.5 24.5 24.0 24.0 16.0 16.0 16.0 23 19.5 18.5 19.0 26.5 25.5 26.0 24.5 23.5 24.0 16.5 16.0 16.0 24 21.0 19.0 20.0 26.0 25.5 26.0 24.0 23.0 23.5 16.5 15.0 15.5 25 22.0 20.5 21.0 26.0 25.5 25.5 23.5 22.5 23.0 15.5 15.0 15.0

26 22.5 20.5 21.0 25.5 25.0 25.5 23.5 22.0 23.0 15.5 15.0 15.0 27 21.5 21.0 21.0 26.5 25.0 25.5 22.0 21.0 22.0 15.5 15.0 15.0 28 22.0 21.5 21.5 26.5 26.0 26.0 21.5 21.0 21.0 15.5 15.0 15.0 29 22.0 21.5 22.0 26.5 26.0 26.0 21.5 20.5 21.0 16.0 15.0 15.5 30 22.0 21.5 22.0 21.0 20.5 20.5 16.0 15.5 16.0 31 21.0 20.5 20.5 MONTH 28.0 20.5 24.0 22.5 15.0 18.0 204 MISSISSIPPI RIVER MAIN STEM 05331545 MISSISSIPPI RIVER AT FIFTH STREET AT NEWPORT, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 —— —— —— 12.4 11.8 12.1 13.6 12.5 13.1 2 —— —— —— 12.4 11.9 12.1 13.4 12.1 12.9 3 —— —— —— 12.7 11.7 12.3 12.7 10.9 12.2 H —— —— —— 12.8 11.6 12.0 12.4 12.1 12.3 5 —— —— —— 12.6 11.9 12.3 12.3 12.0 12.1 6 —— —— —— 12.2 11.6 11.8 12.2 11.9 12.1 7 —— —— —— 12.2 11.7 12.0 12.2 11.9 12.0 8 10.7 10.5 10.6 12.1 11.7 11.8 12.6 11.9 12.2 9 11.0 10.3 10.7 12.4 11.8 12.0 13.1 11.7 12.2 10 10.4 10.1 10.2 13.1 11.7 12.7 13.5 12.1 12.6 11 10.4 10.0 10.1 —— —— —— 13.2 12.1 12.5 12 10.7 10.0 10.3 —— —— —— 13.7 12.2 12.3 13 10.1 9.5 9.8 —— —— —— 12.4 12.1 12.2 14 9.6 9.0 9.2 —— —— —— 13.3 12.1 12.2 15 10.3 9.2 9.3 —— —— —— 12.2 11.9 12.0 16 9.4 9.1 9.2 —— —— —— 13.3 12.3 12.8 17 9.8 9.1 9.4 —— —— —— 12.9 12.6 12.7 18 9.2 8.8 8.9 11.5 10.4 10.9 13.0 12.6 12.7 19 9.2 8.5 8.8 11.4 11.1 11.3 12.8 12.1 12.6 20 11.0 8.9 9.8 11.5 11.2 11.3 12.7 12.0 12.4 21 10.9 10.7 10.8 11.5 11.2 11.4 13.0 11.9 12.5 22 11.1 9.1 10.9 11.6 11.2 11.4 12.8 11.8 12.1 23 11.4 11.0 11.1 11.6 11.1 11.4 13.0 12.1 12.6 24 11.8 9.5 11.6 11.7 11.5 11.6 12.3 12.1 12.2 25 12.3 12.1 12.2 11.7 11.5 11.5 12.3 12.0 12.1 26 13.0 12.7 12.8 11.5 11.0 11.2 12.1 11.4 11.5 27 14.1 14.0 14.0 11.4 11.2 11.3 12.1 11.3 11-7 28 —— —— —— 11.6 11.4 11.5 11.9 11.8 11.9 29 12.7 12.0 12.3 12.3 11.8 12.0 11.9 11.7 11.8 30 12.9 H.8 12.2 12.7 12.4 12.5 11.8 11.6 11.7 31 12.3 11.0 12.1 —— —— —— 11.9 11.1 H.6 MONTH 13.7 10.9 12.3

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 —— —— —— 11<5 i 1>2 11.3 11.9 11.4 11.8 2 —— —— —— 11.5 11.0 11.2 12.1 11.5 H.9 3 —— —— —— H.3 11.1 11.2 12.0 11.5 11.9 —— —— —— 4 14.3 8.7 11.5 11.3 11.1 11.1 12.4 11.8 12.1 5 12.1 11.5 11.8 11.4 11.0 11.2 12.1 11.8 12.0 —— —— —— 6 —— —— —— 11.6 11.4 11.4 12.8 11.8 12.2 —— —— —— 7 12.2 12.1 12.2 11.9 11.7 11.7 —— —— —— —— —— —— 8 12.2 8.7 11.5 13.8 12.2 12.9 9 —— —— —— 12.9 12.5 12.7 —— —— ——i —— —— ™ 10 —— —— —— 13.0 12.7 12.8 —— —— ——i —— —— —— 11 —— —— —— 13.2 12.7 12.9 —— —— ——! 10.7 7.4 9.8 12 —— —— —— 13.2 11.2 12.9 —— —— —— 9.8 9.4 9.5 13 11.2 10.5 10.8 12.8 12.5 12.7 —— —— —— 9-4 8.7 9.0 14 ll.o 10.5 10.7 12.9 12.3 12.4 —— —— —— 9-0 8.5 8.8 15 11.3 8.1 9.9 12.5 12.3 12.4 —— —— —— 9.4 8.6 8.8 16 11.9 8.2 9.8 12.9 11.0 11.6 —— —— —— 9.4 8.6 8.7 17 —— —— —— 11.1 10.9 11.0 —— —— —— 8.7 8.4 8.5 18 11.4 11.0 11.2 11.1 10.9 11.0 —— —— —— 9.0 8.3 8.5 19 —— —— —— 12.4 10.9 11.0 —— —— —— 8.9 8.6 8.7 20 11.5 11.0 11.2 12.4 10.8 10.9 —— —— —— 8.7 8.4 8.5 21 13.5 11.2 12.8 ll.o 10.8 10.9 —— —— —— 9.0 8.6 8.7 22 13.5 9.7 11.8 11.2 10.9 11.0 —— —— ' —— 8.9 8.7 8.8 23 11.0 10.6 10.8 11.1 10.9 11.0 —— —— —— 8.9 8.7 8.8 24 11.0 10.7 10.9 11.4 11.2 11.3 —— —— —— 8.8 8.6 8.7 25 12.7 10.9 11.0 11.4 11.2 11.3 —— —— —— 9.2 7.4 7-9 26 11.4 10.9 11.1 11.4 11.2 11.3 —— —— ——i 9.2 8.1 8.7 27 11.5 11.2 11.3 11.6 11.3 11.4 —— —— —— 8.2 7.9 8.0 28 11.5 11.2 11.3 11.6 11.3 H.4 —— —— —— 8.7 8.0 8.0 29 —— —— —— 11.8 11.5 11.6 —— —— —— 8.0 7.6 7.8 30 —— —— —— 12.1 11.5 11.8 —— —— —— 9.2 7.6 7-7 31 —— —— —— —— —— —— —— —— —— 8.1 7.3 7.4 205 MISSISSIPPI RIVER MAIN STEM 05331545 MISSISSIPPI RIVER AT FIFTH STREET AT NEWPORT, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 8.1 7.3 7.4 7-9 7.7 7.8 6.5 6.2 6.4 6.4 6.0 6.2 2 7.4 7.1 7.2 8.2 7.9 8.0 6.8 6.2 6.5 7-0 6.2 6.6 3 7.2 7.0 7.1 8.2 7-5 7.8 6.6 6.3 6.4 7.0 6.7 6.8 4 7.6 6.8 6.9 7.8 7-3 7.5 6.6 6.0 6.3 7.2 6.8 7.1 5 7.8 6.9 6.9 7-5 6.5 7.0 6.5 6.1 6.3 7-1 6.6 6.9 6 7.0 6.3 6.6 7.0 5.9 6.5 6.1 5.7 5.9 6.5 6.2 6.3 7 8.0 6.5 6.7 6.7 6.1 6.4 5.4 5.2 5.3 6.8 6.2 6.6 8 —— —— —— 6.2 5.9 6.0 5.5 5.0 5.2 7.0 6.6 6.8 9 7.7 7.6 7.6 6.7 5-9 6.3 5.7 5.3 5.5 7.4 6.8 7.1 10 7.7 6.0 7.4 6.6 6.0 6.4 6.2 5.6 5.9 7.6 7.1 7.3 11 7.4 5.8 7.2 6.2 5.8 6.0 6.1 5.8 5.9 7.8 7.0 7.5 12 —— —— —— 6.8 6.2 6.4 6.4 6.0 6.2 7.2 6.2 6.6 13 —— —— —— 6.6 5.8 6.2 6.2 5.6 5-9 7-6 6.1 6.7 14 —— —— —— 6.4 6.0 6.2 5.9 5.4 5.6 5.9 6.7 7.0 15 7.2 7.0 7.1 6.3 6.0 6.2 5.7 5.3 5.5 6.4 6.2 6.3 16 7.4 7.1 7.2 6.7 6.0 6.2 6.1 5-8 5.9 6.8 6.3 6.5 17 7-7 7.2 7.3 6.3 6.0 6.2 6.3 6.0 6.2 7.1 6.6 6.8 18 7.8 7.5 7.6 6.7 6.1 6.4 6.2 5.4 5.8 7.1 6.6 6.9 19 8.0 7.6 7.8 6.7 6.2 6.4 5-9 5.2 5.6 6.7 6.3 6.5 20 8.0 7.7 7.9 6.8 5-5 6.1 5-5 5.2 5.4 21 7.9 7.5 7.8 5.6 5.3 5.5 5.4 5.1 5.3 22 8.0 7.6 7.8 5.5 5.2 5.3 5.3 5.0 5.2 23 8.0 7.8 7.9 5.7 5.4 5-5 5.1 4.7 4.9 24 8.3 7.0 7.8 5.7 5.4 5.5 5-1 4.8 5-0 25 7.4 7.1 7.2 5-7 5-5 5.6 5.1 4.6 4.8 26 7.5 7-2 7.3 6.1 5.7 5.8 6.2 5.8 6.0 —— —— —— 27 7.8 7.1 7.5 6.2 6.1 6.1 6.3 5.9 6.1 —— —— —— 28 7-8 7.1 7.5 6.3 6.1 6.2 6.4 5.8 6.1 29 8.0 7.1 7.5 6.9 6.0 6.2 7.0 6.1 6.5 —— —— —— 30 8.0 7.4 7.7 —— —— —— 6.8 6.2 6.5 —— —— —— 31 —— —— —— —— —— —— 6.9 6.0 6.4 —— —— —— MONTH 7.0 4.6 5.8 206 MISSISSIPPI RIVER MAIN STEM 05331560 MISSISSIPPI RIVER AT GREY CLOUD ISLAND NEAR COTTAGE GROVE, MN WATER-QUALITY RECORDS LOCATION.—Lat 44°48'13", long 93°00'43", in NWJNE4 sec.26, T.27 N., R.22 W., Washington County, Hydrologic Unit 07010206, on left bank at the J. L. Shiely Co. loading dock, and at mile 826.2 (1,330 km) upstream from Ohio River. PERIOD OP RECORD.—February 1977 to current year. PERIOD OP DAILY RECORD.-- SPECIFIC CONDUCTANCE: September 1977 to current year. pH: September 1977 to current year. WATER TEMPERATURES: September 1977 to current year. DISSOLVED OXYGEN: September 1977 to current year. INSTRUMENTATION.—Water-quality monitor since September 1977. REMARKS.--Water discharge computed on the basis of discharge for Mississippi River at St. Paul (station 05331000) adjusted for inflow and travel time. Extremes are published for years with 80 percent or more daily record. COOPERATION.--Samples collected and water-quality monitor operated by the Metropolitan Waste Control Commission, St. Paul, MN. EXTREMES POR PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE (water year 1981-82): Maximum, 712 micromhos July 23, 1982; minimum, 318 micromhos Sept. 17, 1981. pH (water year 1981-82): Maximum, 8.7 units May 13, Sept. 6, 7, 9, 13, 1981; minimum, 7.3 units Oct. 1, 9, 10, 1980; Mar. 17, June 30, July 1, 2, Oct. 3, 1981; and Jan. 7-9, 1982. WATER TEMPERATURES (water year 1981-82): Maximum, 28.0°C Aug. 7, 1982; minimum, 0.0°C several days during winter period. DISSOLVED OXYGEN (water year 1981-82): Maximum, 15.3 mg/L Mar. 24, 1981; minimum, 3.2 mg/L Aug. 30, 1982. EXTREMES POR CURRENT YEAR.— SPECIFIC CONDUCTANCE: Maximum, 712 micromhos July 23; minimum, 350 micromhos Apr. 20. pH: Maximum, 8.5 units Apr. 16, Aug. 2; minimum, 7.3 units Oct. 3, Jan. 7, 8, 9. WATER TEMPERATURES: Maximum, 28.0°C Aug. 7; minimum, 0.0°C several days during winter period. DISSOLVED OXYGEN: Maximum, 14.5 mg/L Oct. 27, Apr. 9; minimum, 3.2 mg/L Aug. 30.

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEO. C). WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 538 522 527 479 468 473 529 509 517 625 605 615 2 521 501 513 474 464 469 548 515 532 612 603 607 3 540 506 526 474 461 468 538 519 531 611 598 604 4 494 461 476 477 462 470 534 515 523 606 583 591 5 494 481 486 486 470 477 530 520 527 602 576 586 6 457 445 451 487 477 482 523 503 516 7 466 446 457 483 473 479 538 495 511 8 477 463 469 490 469 481 559 529 544 9 470 456 464 483 469 476 580 561 575 10 473 455 465 475 459 465 588 569 582 11 477 454 467 479 468 474 575 561 567 12 466 456 460 484 468 478 584 563 575 13 467 448 458 492 480 487 582 566 576 14 454 444 449 499 490 495 584 574 581 15 451 440 445 497 485 491 609 583 599 16 449 431 439 494 487 491 601 593 597 17 437 414 424 496 480 488 589 573 581 18 418 411 415 490 479 485 636 587 612 19 432 415 426 484 463 473 651 636 641 20 429 421 425 493 470 487 626 620 623 21 426 411 419 494 485 491 619 602 610 22 431 415 424 500 488 494 664 612 635 23 442 429 433 497 484 491 685 663 676 24 442 425 432 507 483 496 667 640 649 25 444 432 436 512 504 508 639 633 636 26 445 426 433 516 502 511 633 621 627 27 439 422 429 509 499 503 625 609 617 28 450 438 442 513 491 504 629 619 615 29 482 475 478 507 493 501 630 613 624 30 486 463 471 517 505 510 609 595 599 31 483 462 470 610 ' 594 602 MONTH 540 411 455 517 459 487 685 495 i587 MISSISSIPPI RIVER MAIN STEM 207 05331560 MISSISSIPPI RIVER AT GREY CLOUD ISLAND NEAR COTTAGE GROVE, MN—Continued SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 569 547 560 529 505 519 432 423 427 2 571 561 564 507 472 490 425 417 421 3 596 569 582 472 455 462 426 413 420 4 603 596 600 458 446 451 426 421 423 5 617 600 611 448 431 439 432 408 417 6 601 562 579 434 424 430 417 397 408 7 560 545 555 427 422 425 418 405 410 8 421 409 414 426 413 417 9 410 403 406 434 422 427 10 406 403 405 426 417 422 11 567 529 552 414 405 411 430 414 419 12 594 548 569 426 413 420 442 418 426 13 589 548 570 433 421 426 435 426 429 11 591 536 571 434 431 432 439 431 435 15 583 566 578 437 432 435 438 427 431 16 526 501 519 582 580 581 434 424 430 436 421 428 17 540 505 518 581 572 575 423 404 412 436 426 431 18 564 535 545 583 530 548 403 387 396 439 430 433 19 563 542 553 532 503 515 385 369 376 435 426 430 20 576 556 569 505 490 496 370 350 361 427 411 416 21 615 535 580 514 500 507 364 356 361 412 403 407 22 645 596 620 510 493 499 376 363 368 421 411 418 23 638 611 623 507 502 504 398 374 384 423 416 420 21 609 584 591 512 502 506 410 397 402 443 425 432 25 586 555 564 513 506 510 416 407 410 459 444 452 26 554 538 545 522 513 516 428 411 420 470 458 463 27 560 546 553 533 522 526 435 428 430 476 464 470 28 569 543 556 544 533 537 435 427 430 29 548 542 545 429 422 426 30 552 539 544 431 419 426 31 539 530 535 MONTH 529 350 420

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 581 565 575 654 644 650 580 544 557 2 574 559 566 666 635 652 571 546 558 3 577 559 568 642 624 632 556 540 550 4 566 559 563 642 630 636 549 530 542 5 575 556 565 684 626 660 511 496 503 6 583 559 572 505 487 494 7 562 547 551 535 494 514 8 555 535 542 9 555 540 548 10 561 543 550 11 555 516 532 12 562 542 548 13 569 561 565 14 570 539 559 15 576 567 571 547 530 538 489 487 488 16 588 577 581 565 548 557 504 489 498 17 640 590 612 579 566 575 508 480 493 18 642 632 638 580 574 578 533 485 517 19 637 624 630 595 577 583 530 518 522 20 626 624 625 660 594 633 525 499 512 21 626 625 625 683 656 670 512 494 504 22 634 624 626 708 685 694 515 500 507 23 642 635 639 712 649 678 519 502 510 24 641 630 638 651 638 643 522 509 517 25 630 614 620 659 644 648 582 550 565 525 496 514 26 616 604 610 673 650 662 565 554 560 522 494 513 27 615 604 608 676 659 665 585 550 565 520 508 514 28 603 589 595 677 664 672 592 569 578 526 500 515 29 609 578 594 678 662 672 580 555 568 505 494 500 30 590 568 578 697 665 685 547 530 538 512 494 501 31 —— —— —— 663 642 649 558 512 536 MONTH 712 516 600 208 MISSISSIPPI RIVER MAIN STEM 05331560 MISSISSIPPI RIVER AT GREY CLOUD ISLAND NEAR COTTAGE GROVE, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 8.0 7.7 7.8 8.1 7.7 7-9 7.7 7.6 7.6 7.6 7.6 7.6 2 7.8 7.7 7.8 8.1 7-7 7.9 7-7 7.6 7.6 7.6 7.6 7.6 3 7.9 7.3 7.8 8.0 7-9 8.0 7.7 7.6 7.6 7.6 7.5 7.5 1 8.0 7.9 8.0 8.0 7.9 8.0 7.7 7.6 7.7 7.5 7.5 7.5 5 8.0 7.8 7.9 8.0 7.9 7.9 7.7 7.7 7.7 7.5 7.5 7.5 6 8.0 7.6 7.8 7.9 7.7 7.8 7-7 7.7 7.7 7.1 7.1 7.1 7 8.2 7.7 7.9 8.0 7.7 7.8 7-7 7.7 7.7 7.1 7.3 7.1 8 8.2 7.8 8.0 8.0 7.8 7.9 7.7 7.6 7.6 7.1 7-3 7.1 9 8.2 8.0 8.0 8.0 7.7 7.8 7.8 7.6 7.7 7-3 7-3 7.3 10 8.2 7.9 8.0 8.1 7.8 7.9 7.9 7.8 7.8 11 8.2 8.0 8.1 8.0 7.8 7.9 7-8 7.8 7.8 12 8.3 8.2 8.3 8.1 7-8 8.0 7.8 7.8 7.8 13 8.3 8.0 8.2 8.1 8.0 8.0 7.8 7.8 7.8 11 8.0 7.7 7.9 8.0 7-9 8.0 7-8 7.8 7.8 15 8.0 7.6 7.8 8.0 7.9 7-9 7.8 7.8 7.8 16 8.0 7.8 8.0 8.0 7-9 7.9 7.8 7-7 7.7 17 7.8 7.6 7.7 7.9 7.8 7.8 7-7 7.7 7.7 18 8.1 7.6 7.7 7.8 7.7 7-7 7.7 7.7 7.7 19 8.1 8.0 8.0 7.7 7.6 7.6 7-7 7.7 7.7 20 8.0 7.7 7.8 7.7 7.6 7.6 7.7 7.7 7.7 21 7.9 7.7 7.8 7.9 7.6 7.7 7-7 7.7 7.7 22 7.7 7.6 7-7 7.8 7.7 7-7 7.7 7.7 7.7 23 7.8 7.7 7.7 7-7 7.7 7.7 7-7 7.6 7.7 21 8.0 7.7 7.8 7.7 7-6 7.7 7.6 7.6 7.6 —— —— —— 25 8.0 7.9 8.0 7.7 7.6 7.6 7.6 7.6 7.6 26 8.2 7.7 7.9 7-7 7-6 7.6 7.6 7.6 7.6 27 8.3 7.8 8.2 7.7 7.6 7.6 7-6 7-5 7.5 28 8.3 8.2 8.3 7.6 7-6 7.6 7.5 7.5 7.5 29 8.3 8.2 8.3 7.7 7.6 7-6 7-5 7.1 7.1 30 8.3 8.2 8.2 7.7 7-6 7.6 7-1 7.1 7.1 31 8.2 8.1 8.1 —— —— —— 7.6 7.1 7.5 MONTH 8.3 7.3 8.0 8.1 7.6 7.8 7-9 7.1 7-7

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 —— —— —— 8.0 8.0 8.0 8.0 8.0 8.0 8.2 8.1 8.1 2 —— —— —— 8.0 8.0 8.0 8.0 8.0 8.0 8.2 8.1 8.1 3 —— —— —— 8.0 8.0 8.0 8.0 7.9 7.9 8.2 8.1 8.1 14 —— —— —— 8.2 8.0 8.0 8.0 7.9 7.9 8.2 8.1 8.1 5 —— —— —— 8.1 8.0 8.1 8.0 7.9 8.0 8.1 8.0 8.1 6 —— —— —— 8.1 8.0 8.0 8.0 7.9 8.0 8.0 7.9 8.0 7 —— —— —— 8.1 8.0 8.0 8.0 8.0 8.0 8.1 7.9 8.0 8 —— —— —— —— —— —— 7.9 7.9 7.9 8.1 7.9 8.0 9 —— —— —— —— —— —— 7.9 7.9 7.9 8.0 8.0 8.0 10 —— —— —— —— —— —— 7.9 7.9 7.9 8.1 8.0 8.1 11 —— —— —— 7.8 7.7 7.8 8.0 7-9 8.0 8.1 8.0 8.0 12 —— —— —— 7.8 7.7 7.7 8.0 8.0 8.0 8.0 7.9 8.0 13 —— —— —— 7.8 7.7 7.8 8.0 8.0 8iO 8.0 7.9 8.0 11 —— —— —— 7.8 7.7 7.8 8.1 8.1 8Ll 8.0 8.0 8.0 15 —— —— —— 7.8 7.7 7.7 8.1 8.1 8.1 8.1 8.0 8.0 16 8.2 8.0 8.1 8.0 7-7 7.8 8.5 8.1 8.2 8.1 8.0 8.0 17 8.3 8.0 8.1 8.0 7.9 7.9 8.1 8.1 8.1 8.0 8.0 8.0 18 7.9 7.7 7.8 7.9 7.9 7.9 8.1 8.1 8.1 8.0 8.0 8.0 19 7.7 7.6 7.6 7.9 7.9 7.9 8.3 8.1 8.1 8.1 8.0 8.0 20 7.8 7.6 7.7 7.9 7.9 7.9 8.1 8.0 8.0 8.0 8.0 8.0 21 7.8 7.7 7.8 7.9 7.9 7.9 8.1 8.0 8.1 8.0 7.9 8.0 22 7.8 7.7 7.7 7.9 7.9 7.9 8.1 8.0 8.0 8.0 8.0 8.0 23 7.9 7.8 7.9 8.0 7.9 7.9 8.1 8.0 8.1 8.0 7.9 8.0 21 7.9 7.9 7.9 7.9 7.9 7.9 8.1 8.0 8.0 8.0 8.0 8.0 25 8.0 7.9 7.9 7.9 7.9 7.9 8.1 8.0 8.0 8.1 8.0 8.0 26 8.0 8.0 8.0 7.9 7.9 7.9 8.1 8.1 8.1 8.1 8.0 8.1 27 8.0 8.0 8.0 8.0 7.9 8.0 8.2 8.1 8.1 8.1 8.0 8.0 28 8.0 8.0 8.0 8.0 8.0 8.0 8.2 8.1 8,1 29 —— —— —— 8.0 8.0 8.0 8.2 8.1 8.1 —— —— —— 30 —— —— —— 8.0 8.0 8.0 8.2 8.1 8il —— —— —— 31 —— —— —— 8.0 8.0 8.0 —— —— —— —— —— —— MONTH 8.5 7.9 8.0 209 MISSISSIPPI RIVER MAIN STEM 05331560 MISSISSIPPI RIVER AT GREY CLOUD ISLAND NEAR COTTAGE GROVE, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 8.2 7.9 8.0 8.3 8.0 8.1 8.3 8.1 8.2 8.0 7.9 7.9 2 8.1 7.9 8.0 8.4 8.0 8.2 8.5 8.0 8.2 8.0 7.8 7.9 3 8.1 7.8 7.9 8.3 8.2 8.3 8.4 8.3 8.4 8.0 7.8 7.9 4 8.1 7.8 8.0 8.3 8.1 8.2 8.3 8.2 8.2 8.2 7.8 8.0 5 8.2 7.8 8.0 8.3 8.2 8.2 —— —— 8.2 8.0 8.1 6 8.1 8.0 8.1 8.3 8.1 8.2 ______8.2 8.0 8.1 7 8.2 8.0 8.1 8.1 8.0 8.1 _ _ __ 8.1 8.1 8.1 8 8.2 8.0 8.1 7.9 7.8 7.9 ___ — _ — _ —— 9 8.2 8.1 8.1 8.1 7.7 7.9 —— —— 10 8.2 7.9 8.1 8.0 7.8 7.9 —— —— —— —— —— —— 11 8.3 7.9 8.1 8.0 7.9 7.9 ______12 8.2 8.0 8.1 8.1 7.9 8.0 — _ —— —— — _ 13 8.3 8.0 8.1 8.1 7.9 8.0 —— —— —— — _ 14 8.2 7.9 8.1 8.0 7.8 7.9 — _ — _ —— 15 8.3 8.2 8.3 7.9 7.8 7.9 —— —— —— —— —— —— 16 8.4 8.1 8.2 8.0 7.8 7.9 ______8.0 7.8 7.9 17 8.3 8.1 8.2 8.0 7.9 7.9 —— 8.1 7.9 8.0 18 8.1 7-9 8.0 8.0 7.8 7.9 —— —— 8.2 8.0 8.1 19 8.2 7.9 8.1 8.2 7.8 8.0 ______8.2 8.1 8.2 20 8.2 8.2 8.2 8.2 8.0 8.1 —— —— —— 8.2 8.1 8.1 21 8.2 8.2 8.2 8.1 8.1 8.1 ______8.2 8.0 8.1 22 8.4 8.2 8.2 8.1 8.0 8.1 ___ — _ —— 8.2 8.1 8.2 23 8.4 8.0 8.2 8.1 7.9 8.0 ______8.2 8.1 8.1 24 8.4 8.2 8.3 8.0 7.9 8.0 ______—— 8.2 8.1 8.2 25 8.2 8.0 8.1 8.0 7.9 8.0 —— —— —— 8.2 8.1 8.1 26 8.3 8.0 8.2 7.9 7.9 7.9 8.1 7.9 8.0 8.2 8.1 8.1 27 8.4 8.1 8.3 8.2 7.8 8.0 8.0 7-9 7.9 8.3 8.1 8.2 28 8.4 8.2 8.3 8.2 8.1 8.1 8.0 7.8 7.9 8.3 8.2 8.2 29 8.4 8.1 8.2 8.2 8.1 8.2 8.0 7.9 7.9 8.2 8.2 8.2 30 8.3 8.1 8.2 8.3 8.0 8.1 8.0 7.8 7.9 8.2 8.0 8.1 31 ------—— 8.4 8.1 8.2 8.0 7.9 8.0 —— —— —— MONTH 8.4 7.8 8.1 8.4 7.7 8.0 TEMPERATURE , WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 15-5 13.0 13.5 8.0 7.5 8.0 1.5 1.5 1.5 .0 .0 .0 2 13.5 12.5 13.0 8.0 7.5 8.0 1.5 1.0 1.5 .0 .0 .0 3 12.5 12.5 12.5 7.5 7-0 7.5 1.0 .5 1.0 .0 .0 .0 4 12.5 12.0 12.0 7.5 7.0 7.5 1.0 .5 1.0 .0 .0 .0 5 12.0 11.5 11.5 7.5 7.5 7.5 .5 .5 .5 .5 .0 .0 6 12.5 11.5 11.5 7.5 7.0 7.0 1.0 .5 .5 .5 • 5 .5 7 12.5 11.5 12.0 7.5 7.0 7.5 1.0 .5 .5 .5 .5 .5 8 12.5 11.5 12.0 7.5 6.5 7.0 1.0 .5 1.0 .5 .5 .5 9 12.5 11.5 12.0 7.0 6.5 7.0 1.0 .5 1.0 .5 .5 .5 10 12.0 11.5 12.0 6.5 6.0 6.5 1.0 .5 .5 11 12.0 11.5 12.0 6.0 5.5 5.5 1.0 .5 1.0 ______12 12.5 12.0 12.5 5.5 5.0 5.5 1.0 1.0 1.0 —— 13 13.0 12.5 13.0 5.5 5.0 5.5 1.0 1.0 1.0 — _ 14 13.5 13.0 13.0 6.0 5.5 6.0 1.0 .5 .5 —— —— 15 13.5 13.0 13.0 6.5 6.0 6.0 .5 .0 .5 —— —— —— 16 13.5 13.0 13.0 7.0 6.5 6.5 .5 .0 .5 ______17 13.0 11.0 12.0 7.0 6.5 6.5 .5 .0 .5 —— 18 11.0 10.5 10.5 6.5 6.0 6.5 .5 .5 .5 —— —— —— 19 10.5 9.5 10.0 6.0 4.5 5.5 .5 .5 .5 —— —— —— 20 9.5 9.0 9.5 4.5 3.5 4.0 .5 .5 .5 —— —— 21 9.5 9.0 9.5 3.5 3.0 3-5 .5 .5 .5 ______22 12.0 8.0 8.5 3.0 2.0 2.5 .5 .5 .5 —— —— —— 23 8.0 6.5 7.0 2.0 1.5 2.0 .5 .5 .5 —— —— —— 24 10.0 5.0 6.0 1.5 1.5 1.5 .5 .5 .5 _ — —— —— 25 5-5 4.5 5.0 2.0 1.5 1.5 .5 .5 .5 —— —— —— 26 4.5 4.0 4.0 2.0 2.0 2.0 .5 .5 .5 ______27 7.0 4.0 4.5 2.0 1.5 2.0 .5 .5 .5 —— — _ 28 5.0 4.5 4.5 1.5 1.5 1.5 .5 .0 .5 —— —— 29 6.5 6.0 6.0 1.5 1.5 1.5 .5 .0 .0 — _ — _ 30 7.5 6.5 7.0 1.5 1.0 1.5 .5 .0 .0 —— — _ 31 8.0 7.5 8.0 —— .5 .0 .0 —— —— —— MONTH 15.5 4.0 10.0 8.0 1.0 5.0 1.5 .0 .5 210 MISSISSIPPI RIVER MAIN STEM 05331560 MISSISSIPPI RIVER AT GREY CLOUD ISLAND NEAR COTTAGE GROVE, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 2.0 1.0 1.5 5.0 4.0 4.0 14.0 12.5 13.0 2 2.0 1.5 2.0 4.5 4.0 4.0 15.5 13.0 14.0 3 2.0 1.0 1.5 4.5 3.0 3.5 15.5 14.0 15.0 4 1.5 .0 1.0 3-0 2.0 2.5 16.5 15.0 16.0 5 1.5 .5 1.0 2.5 2.0 2.0 16.0 15.5 16.0 6 1.0 .0 .5 2.5 1.5 2.0 15.5 14.5 15.0 7 .5 .0 .5 2.0 1.0 1.5 15.0 13.5 14.5 8 2.0 1.5 1.5 15.5 14.0 14.5 9 2.0 1.5 1.5 15.5 14.5 15.0 10 2.0 1.5 2.0 16.5 15.0 15.5 11 1.5 .5 1.0 3.0 1.5 2.0 17.0 16.0 16.5 12 1.5 1.0 1.0 3.5 2.5 3.0 16.5 16.0 16.5 13 2.0 1.0 1.5 4.5 3.0 3.5 16.0 15.5 16.0 14 3.0 .5 2.0 6.0 2.0 4.5 17.0 15.5 16.5 15 2.5 2.5 2.5 7.0 5.5 6.0 17.5 16.5 17.0 16 1.0 .5 1.0 3.0 2.5 2.5 8.5 7.0 7.5 17.5 17.0 17.5 17 1.5 1.0 1.0 3.0 2.5 2.5 8.0 7.0 7.5 17.5 17.5 17.5 18 1.5 1.0 1.0 3.0 2.5 2.5 8.0 7.0 7-5 18.0 17.0 17.5 19 1.5 1.0 1.5 2.5 2.0 2.0 7.5 7.0 7.5 18.0 17.0 17.5 20 2.5 1.5 2.0 2.0 1.5 1.5 7.5 7.0 7.0 18.0 17-0 17.5 21 2.5 1.5 2.0 2.0 1.0 1.5 8.5 7.0 7.5 17.5 16.5 17.0 22 2.5 1.5 2.0 2.0 1.5 1.5 8.5 7.0 7.5 16.5 16.0 16.5 23 1.5 1.0 1.5 2.5 2.0 2.0 10.0 8.0 8.5 16.5 16.0 16.0 24 1.5 1.0 1.0 2.5 1.5 2.0 11.0 9.0 10.0 17.0 16.0 16.5 25 1.0 .5 1.0 2.5 2.0 2.5 11.5 10.0 10.5 17.5 16.5 17.0 26 1.5 1.0 1.0 2.0 1.0 1.5 12.0 11.0 11.5 17.0 17.0 17.0 27 2.0 1.0 1.5 2.5 1.0 1.5 13.0 11.5 12.0 17.5 17.0 17.0 28 2.0 1.5 1.5 2.5 1.5 2.0 13.5 12.0 12.5 29 3.0 2.5 2.5 14.0 12.0 13.0 30 3.5 3.0 3.5 13.5 12.5 13.0 31 4.0 3.0 3.5 MONTH 14.0 1.0 6.0

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 19.5 17-0 19.0 23.0 21.5 22.5 26.0 24.5 25. b 21.0 19.5 20.5 2 18.5 18.0 18.5 23.0 22.0 22.5 26.0 24.5 25.5 21.0 20.0 20.5 3 18.5 17.5 18.0 23.5 22.0 23.0 27.0 25.0 26.0 21.0 19.5 20.5 4 18.5 17-5 18.0 24.5 23.0 23.5 27.5 26.0 26.5 21.5 20.0 21.0 5 19.0 17.5 18.0 25.5 24.0 24.5 27.0 26.5 27.0 21.5 21.0 21.0 6 18.5 18.0 18.0 25.5 25.0 25.0 27.5 27.5 27.5 21.0 20.0 20.5 7 19.0 17.5 18.0 25.5 24.5 25.0 28.0 27.5 27.5 20.5 20.0 20.0 8 19.0 17.5 18.5 25.5 24.5 25.0 22.5 18.5 20.0 9 18.5 18.0 18.5 25.0 24.5 24.5 10 19.0 17.5 18.0 24.5 23.0 24.0 11 19.0 17.5 18.0 23.5 23.0 23.0 12 19.5 17.5 19.0 23.5 22.5 23.0 13 20.0 18.5 19.0 25.5 22.5 24.0 14 19.5 17.5 19.0 25.5 24.5 25.0 15 18.5 18.0 18.0 25.5 25.0 25.0 16 19.0 17.5 18.0 25.5 24.0 25.0 17.0 16.0 16.5 17 19.5 18.5 19.0 25.0 24. 25.0 16.0 15.0 15.5 18 19.5 18.5 19.0 25.5 24. 25.0 16.0 15.5 16.0 19 19.0 18.5 19.0 25.5 24. 25.0 15.5 15.0 15.0 20 19.0 19.0 19.0 26.0 24.5 25.0 16.5 15.0 16.0 21 19.0 19.0 19.0 25.5 25.0 25. 16.0 15.5 16.0 22 19.5 19.0 19.0 26.5 25.0 25. 16.0 15.0 15.5 23 20.0 18.5 19.0 27.0 26.0 26. 15.0 15.0 15.0 24 20.0 19.0 19.5 27.0 26.5 27.0 14.5 14.0 14.5 25 20.5 19.0 20.0 27.0 26.5 27.0 23.5 22.5 23.0 15.0 13.5 14.5 26 21.0 19.5 20.0 27.0 26.5 27.0 23.0 21.0 22.0 14.5 13- 14.0 27 22.0 20.0 21.0 27.0 26.0 26.5 21.0 20.0 20.5 14.0 13. 14.0 28 22.5 21.0 21.5 27.0 26.0 26.5 20.5 20.0 20.0 15.0 13. 14.5 29 24.0 21.5 23.0 26.5 25.0 25.5 19.5 19.0 19.0 15.5 14. 15.0 30 23.5 23.0 23.0 25.5 24.5 25.0 19.5 18.5 19.0 15.5 15.0 15.5 31 —— —— —— 25.5 24.5 25.0 20.0 18.5 19.5 MONTH 24.0 17.0 19-0 27.0 21.5 25.0 211 MISSISSIPPI RIVER MAIN STEM

05331560 MISSISSIPPI RIVER AT GREY CLOUD ISLAND NEAR COTTAGE GROVE, MN--Contlnued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 8.8 8.1 8.3 13.6 12.7 13.1 13.3 12.5 12.9 11.7 11.3 11.5 2 9-3 8.1 8.9 13.1 12.6 12.9 13.1 12.6 12.8 11.5 11.0 11.3 3 9.5 8.3 9.2 13.0 11.6 12.2 13.0 12.7 12.9 11.3 10.9 11.1 1 8.7 8.1 8.1 11.5 10.9 11.2 13.0 12.6 12.8 11.2 10.9 11.1 5 8.5 8.0 8.2 10.8 10.2 10.5 13.2 12.8 12.9 12.1 10.8 11.5 6 8.9 8.1 8.6 10.5 10.0 10.2 13.2 12.9 13.0 12.3 12.1 12.2 7 9.3 8.1 8.8 10.9 10.0 10.1 13.3 12.9 13.1 8 9.8 8.9 9-1 10.1 10.0 10.2 13.0 12.2 12.6 9 9.1 8.9 9.2 10.7 9.8 10.2 12.5 11.9 12.2 10 9.5 9.0 9.2 11.3 10.1 10.8 12.5 12.1 12.3 11 10.2 9-0 9.7 11.8 11.1 11.6 12.8 12.3 12.5 12 9.2 8.7 9.0 12.7 11.8 12.2 12.7 12.4 12.6 13 9.1 8.3 8.8 12.3 11.7 12.0 12.8 12.5 12.7 IH 9.5 8.6 9.1 11.8 11.5 11.6 12.9 12.4 12.6 15 9-5 8.9 9.2 11.1 10.8 11.1 13.0 12.6 12.8 16 10.2 9.2 9-7 11.2 10.1 10.8 13.4 12.7 13.0 17 10.1 9.8 10.2 11.5 10.7 11.2 13.2 12.8 13.0 18 10.7 10.0 10.3 11.1 10.9 11.1 13.0 12.7 12.9 19 10.9 10.2 10.5 11.1 10.7 10.9 13.1 12.8 13.0 20 10.6 10.2 10.1 11.5 10.8 11.1 13.1 12.8 12.9 21 10.7 10.1 10.5 11.7 11.2 11.5 13.1 12.8 12.9 22 11.5 10.1 11.1 12.1 11.5 11.8 13.2 12.9 13.0 23 12.2 11.8 11.9 12.2 11.8 12.0 13.1 12.7 12.9 21 12.8 11.2 12.5 12.3 11.9 12.1 12.7 12.4 12.6 25 13.1 12.3 12.7 12.3 11.9 12.1 12.8 12.5 12.6 26 13.9 13-0 13-5 12.1 11.9 12.0 12.7 12.3 12.4 27 11.5 12.8 13.6 12.1 11.6 12.0 12.3 12.0 12.2 28 11.3 13.9 11.2 12.5 12.0 12.3 12.1 11.8 11.9 29 13.6 13.1 13.5 12.7 12.3 12.5 11.9 11.6 11.8 30 13.3 12.6 13.1 12.8 12.5 12.7 11.8 11.5 11.7 31 13.3 12.5 12.8 11.6 11.4 11.5 MONTH 11.5 8.0 10.5 13.6 11.5 13.4 11.4 12.6

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 11.6 10.7 11.1 12.8 12.3 12.6 8.0 6.8 7.5 2 11.7 11.5 11.6 12.7 11.8 12.4 7.6 7.0 7.3 3 11.8 11.5 11.7 12.7 12.1 12.4 7.5 6.6 7.1 1 12.3 11.5 11.9 13.1 12.5 12.9 9.2 6.4 7.7 5 12.2 11.9 12.0 13.4 12.2 12.9 9.0 7.9 8.4 6 12.2 11.8 12.0 13.3 12.4 12.8 8.9 6.9 8.0 7 12.3 12.0 12.0 13.5 13.0 13.2 9.6 8.8 9.2 8 14.4 13.5 14.0 9.5 8.6 9-0 9 14.5 12.9 13.4 8.9 8.2 8.5 10 14.4 13.5 13.8 9-5 8.7 9.0 11 11.7 11.3 11.5 14.0 13.2 13.6 9.3 8.7 9.0 12 11.7 11.1 11.5 13.6 12.2 13.0 9.4 8.3 9.0 13 11.6 11.0 11.3 13.4 12.9 13.1 9.2 8.4 8.8 11 11.6 10.7 11.0 12.8 11.2 11.9 9-1 8.4 8.8 15 11.3 10.8 11.1 12.4 11.4 12.0 8.9 8.3 8.6 16 11.3 10.8 11.0 11.3 11.0 11.1 11.9 10.6 11.4 8.7 7.9 8.3 17 10.9 10.7 10.8 11.5 11.3 11.1 11.9 10.7 11.2 8.4 7.7 7.9 18 10.8 10.5 10.7 11.7 11.0 11.1 12.5 11.0 12.0 8.4 7.3 7.7 19 11.5 10.6 11.0 11.9 11.3 11.7 12.0 11.4 11.7 9-0 7.7 8.0 20 11.9 11.2 11.7 11.9 11.5 11.8 12.4 11.5 11.7 9.0 7.8 8.3 21 12.2 11.1 11.6 12.1 11.5 11.9 11.8 11.3 11.5 9.0 8.2 8.6 22 11.6 11.0 11.3 12.0 11.8 11.9 11.6 10.9 11.2 9.1 8.7 8.9 23 11.8 10.1 11.0 11.9 11.7 11.8 11.8 10.6 11.1 9.0 8.7 8.8 24 11.1 10.8 11.1 11.7 11.5 11.6 11.3 10.8 11.0 8.8 6.9 7.8 25 11.1 10.6 10.9 11.8 11.5 11.6 11.2 10.7 10.9 8.7 7.1 7.6 26 11.1 10.8 11.0 12.0 11.7 11.8 11.1 10.1 10.6 8.8 8.3 8.6 27 11.0 10.8 10.9 12.2 11.8 12.0 10.7 9.6 10.1 8.5 7.8 8.2 28 11.1 10.9 11.0 12.3 11.9 12.1 11.5 9.0 10.7 8.8 8.3 8.4 29 12.2 11.9 12.0 9.6 8.8 9.2 8.8 7.2 8.4 30 12.1 11.7 12.0 9.4 7.5 8.8 8.9 7.6 8.2 31 12.6 11.9 12.2 8.6 7.6 7.8 MONTH 14.5 7.5 11.9 9.6 6.1 212 MISSISSIPPI RIVER MAIN STRM 05331560 MISSISSIPPI RIVER AT GREY CLOUD ISLAND NEAR COTTAGE GROVE, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 8.4 7.6 8.0 8.7 7.7 8.1 7.1 6.4 6.8 5.5 4.3 4.7 2 8.0 7.7 7.9 8.2 7.4 7.8 8.0 6.2 6.8 6.5 4.7 5.6 3 8.3 7.7 7.9 8.5 7.5 7.8 7.9 7.0 7.4 6.4 5.4 6.0 4 7.8 7.2 7.4 8.0 7.3 7.7 7.2 6.0 6.6 7.0 5.6 6.2 5 7.9 7.0 7.4 7.9 7.4 7.6 6.4 5.4 6.0 6 8.2 7.7 8.0 7.5 6.5 7.1 6.4 5.2 5.8 7 8.4 7.7 8.0 6.6 5.9 6.3 6.4 5.6 6.0 8 8.4 7.6 8.0 6.2 5.6 6.0 9 7.9 7.5 7.7 6.8 - 5.8 6.3 10 8.6 7.0 7.7 6.7 6.0 6.4 11 8.2 6.8 7.8 6.3 5.9 6.1 12 7.4 6.5 6.9 7.3 5.9 6.4 13 6.7 5.7 6.4 7.6 6.8 7.1 in 7.5 5.3 6.0 7.2 6.5 7.0 15 7.3 7.1 7.2 6.6 6.1 6.4 16 7.2 7.0 7.1 6.5 6.0 6.2 8.2 6.7 7.2 17 7.7 6.9 7.3 6.7 6.3 6.5 8.8 8.1 8.5 18 7.8 7.4 7.6 6.7 6.4 6.6 9.1 8.2 8.6 19 8.1 7.6 7.8 6.9 6.5 6.6 9.1 8.5 8.8 20 7.9 7.7 7.8 7.2 6.4 6.8 8.1 7.5 8.2 21 8.0 7.7 7.8 6.8 6.1 6.4 9.2 8.9 9.0 22 8.0 7.7 7.8 6.5 5.9 6.2 9.1 8.3 8.8 23 8.0 7.7 7.9 6.5 5.9 6.1 8.8 8.2 8.4 24 7.9 6.6 7.5 6.7 6.2 6.5 7.9 7.4 7.7 25 7.5 6.6 6.9 6.4 5.9 6.1 7.9 7.0 7.5 26 8.2 7.3 7.8 6.1 5.8 5.9 5.8 5.1 5.3 7.3 6.6 6.9 27 8.3 7.8 8.1 6.2 5.8 6.0 5.5 4.9 5.3 8.5 6.8 7.4 28 8.2 7.6 7-9 6.4 6.1 6.3 4.9 4.4 10.2 8.1 9.5 29 8.2 7.4 7.9 7.2 6.3 6.7 4.9 4.4 10.0 9.2 9.6 30 8.1 7.4 7.8 7.5 6.8 7.0 5.2 3.2 4.1 9.6 8.5 9.1 31 —— —— —— 7.3 6.7 6.9 5.5 4.6 4.9 MONTH 5.3 7.6 5.6 6.7 MISSISSIPPI RIVER MAIN STEM 05331570 MISSISSIPPI RIVER AT NININGER, MN (National stream-quality accounting network station) WATER-QUALITY RECORDS LOCATION.—Lat 44°46'22", long 92°54'07", in NWJNE4 sec.18, T.115 N., R.17 W., Dakota County, Hydrologic Unit 07010206, on right bank at the end of Jason Avenue, and at mile 817.8 (1,316 km) upstream from Ohio River. DRAINAGE AREA.—37,000 mi 2 (95,800 km 2 ), approximately. PERIOD OP RECORD.—January 1977 to current year. REMARKS.—Water-discharge computed on the basis of discharge for Mississippi River at St. Paul (station 05331000) adjusted for inflow and travel time. Letter K indicates non-ideal colony count.

WATER QUALITY DATA, WATER YFA'R OCTOBER 1981 TO SEPTEMBER 1982 DIS­ SPE­ BARO­ CHARGE, SPE­ CIFIC - METRIC IN CIFIC CON­ PRES­ CUBIC CON­ DUCT­ TEMPER­ SURE TUR­ FEET DUCT­ ANCE PH PH ATURE , TEMPER­ (MM BID­ TIME PER ANCE LAB LAB AIR ATURE OF ITY DATE SECOND (UMHOS) (UMHOS) (UNITS) (UNITS) (DEG C) (DEG C) HO) (NTU) (00060) (00095) (90095) (00400) (00403) (00020) (00010) (00025) (00076^ NOV 16... 1100 12000 490 477 8.3 8.2 10.0 6.0 739 17 JAN 18... 1130 5600 515 562 7.4 7.9 -13.0 .0 766 2.0 MAR 15... 1045 8160 583 571 8.1 8.0 5.5 3.0 758 16 MAY 19... 1030 34900 445 431 8.1 7.7 21.0 17.0 742 31 JUL 20... 0930 12800 605 548 8.2 7.8 25.0 24.5 745 20 SEP 08... 1145 4570 485 505 8.3 8.0 20.0 20.0 753 17

OXYGEN, COLI- STREP­ HARD­ DIS­ FORM, TOCOCCI NESS MAGNE­ SODIUM SOLVED FECAL, FECAL, HARD­ NONCAR- CALCIUM SIUM, SODIUM, AD­ OXYGEN, (PER­ 0.7 KF AGAR NESS BONATE DIS­ DIS­ DIS­ SORP­ DIS­ CENT UM-MF (COLS. (MG/L (MG/L SOLVED SOLVED SOLVED TION SOLVED SATUR­ (COLS./ PER AS AS (MG/L (MO/L (MG/L RATIO DATE (MG/L) ATION) 100 ML) 100 ML) CAC03) CAC03) AS CA) AS MG) AS NA) (00300) (00301) (31625) (31673) (00900) (95902) (00915) (00925) (00930) (0093D NOV 16... 11.4 95 640 720 224 45 55 21 13 .4 JAN 18... 10.8 74 3000 1900 243 23 61 22 19 .5 MAR 15... 11.2 84 180 100 250 60 62 23 26 • 7 MAY 19... 7.9 84 370 680 206 45 51 19 9.6 .3 JUL 20... 7.0 86 — K40 261 68 65 24 14 .4 SEP 08... 5.6 62 K9 46 214 41 51 21 22 .7

SOLIDS, SOLIDS, POTAS­ ALKA­ CHLO­ FLUO- SILICA, RESIDUE SUM OF SOLIDS, SIUM, LINITY SULFATE RIDE, RIDE, DIS­ AT 180 CONSTI­ DIS­ DIS­ LAB DIS­ DIS­ DIS­ SOLVED DEG. C TUENTS, SOLVED SOLVED (MG/L SOLVED SOLVED SOLVED (MG/L DIS­ DIS­ (TONS (MG/L AS (MG/L (MG/L (MG/L AS SOLVED SOLVED PER DATE AS K) CAC03) AS S04) AS CL) AS F) SI02) (MG/L) (MG/L) DAY) (00935) (90410) (00945) (00940) (00950) (00955) (70300) (70301) (70302) NOV 16... 2.6 180 35 18 .2 9-3 288 262 9330 JAN 18... 3-1 220 39 25 .2 12 358 314 5410 MAR 15... 4.0 190 42 36 .3 15 361 323 7950 MAY 19... 2.8 161 37 14 .2 7.9 257 238 24200 JUL 20... 3.1 193 41 17 .3 16 227 296 7850 SEP 08... 2.9 173 37 27 .2 10 315 275 3890 214 MISSISSIPPI RIVER MAIN STEM 05331570 MISSISSIPPI RIVER AT NININGER, MN--Contlnued WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 NITRO­ NITRO­ NITRO­ PHOS­ SEDI­ SED. GEN, GEN, GEN , AM- PHOS- PHORUS, MENT , SUSP. i02+N03 AMMONIA MONIA + PHOS­ PHORUS, ORTHO, SEDI­ DIS­ SIEVE DIS­ DIS­ ORGANIC PHORUS, DIS­ DIS- MENT , CHARGE, DIAM. SOLVED SOLVED TOTAL TOTAL SOLVED SOLVED SUS­ SUS­ % FINER (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L PENDED PENDED THAN DATE AS N) AS N) AS N) AS P) AS P) AS P) (MG/L) (T/DAY) .062 MM 0063D (00608) (00625) NOV 16.. 2.0 .420 1.40 .230 .070 .040 57 1850 88 JAN 18... 1.5 1.20 1.70 .170 .150 .130 114 1720 96 MAR 15... 2.5 1.20 3.20 .290 .190 .150 11 249 87 MAY 19... 2.8 .160 1.60 .130 .070 .060 100 9420 99 JUL 20. ., 4.0 • 390 7.50 .200 .110 .110 84 2900 100 SEP .47 .730 1.90 .280 .180 .180 37 460 99

CHRO­ BARIUM, CADMIUM MIUM, CHRO­ COBALT , ARSENIC TOTAL BARIUM, TOTAL iADMIUM TOTAL MIUM, TOTAL ARSENIC DIS- RECOV- DIS- RECOV­ DIS­ RECOV­ DIS­ RECOV­ TOTAL SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS AS) AS AS) AS BA) AS BA) AS CD) AS CD) AS CR) AS CR) AS CO) (01002) (01000) (01007) (01005) (01027) (01025) (01034) (01030) (01037) JAN 18... 1130 2 2 100 56 1 1 20 10 3 MAR 15... 1045 2 2 100 68 <1 <1 30 10 2 MAY 19... 1030 2 1 <100 59 1 1 20 10 3 SEP 08... 1145 4 4 100 55 2

MANGA­ COPPER, IRON, LEAD, NESE, MANGA­ MERCURY COBALT, TOTAL COPPER, TOTAL IRON, TOTAL LEAD, TOTAL NESE, TOTAL DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV- DIS- RECOV­ DIS­ RECOV­ SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS CO) AS CU) AS CU) AS PE) AS PE) AS PB) AS PB) AS MN) AS MN) AS HG) (01035) (01042) (01040) (01045) (01046) (0105D (01049) (0^055) (01056) (71900) JAN 18... <1 7 2 280 32 1 <1 70 69 .2 MAR 15... <1 8 5 1000 20 8 2 170 80 .1 MAY 19... 4 9 4 1800 36 7 2 230 41 .3 SEP 08...

NICKEL, SELE­ SILVER, ZINC, MERCURY TOTAL NICKEL, SELE- NIUM, TOTAL SILVER ,] TOTAL ZINC, DIS- RECOV- DIS- NIUM, DIS­ RECOV- DIS­ RECOV- DIS- SOLVED ERABLE SOLVED TOTAL SOLVED ERABLE SOLVED; ERABLE SOLVED (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS HG) AS NI) AS NI) AS SE) AS SE) AS AG) AS AG)| AS ZN) AS ZN) (71890) (01067) (01065) (01147) (01145) (01077) (01075)1 , (01092) (01090) 1 JAN 18. . . <.l 10 10 < 1 < 1 1 < 1 50 9 MAR 15. . . .1 14 9 1 <1 <1 <1 20 20 MAY 19. . . .2 12 5 < 1 < 1 <1 < 1 20 <3 SEP 08. <.l 10 8 < 1 < 1 <1 < 1 20 <4 MISSISSIPPI RIVER MAIN STEM 21 5 05331578 MISSISSIPPI RIVER AT LOCK AND DAM 2 AT HASTINGS, MN LOCATION.—Lat 44°45'37", long 92°52'02", in SE4SW4 sec.l6, T.115 N., R.I? W., Dakota County, Hydrologic Unit 07010206, in old lock house at lock and dam and at mile 815.2 (1,312 km) upstream from Ohio River. PERIOD OP RECORD.—Water years 1975 to current year. PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE: October 1974 to current year. pH: October 197** to current year. WATER TEMPERATURES: October 1974 to current year. DISSOLVED OXYGEN: October 1974 to current year. INSTRUMENTATION.—Water-quality monitor since October 1974. REMARKS.—Water discharge computed on the basis of discharge for Mississippi River at St. Paul (station 05331000) adjusted for inflow and travel time. Extremes are published for those years with 80 percent or more record. COOPERATION.—Samples collected and water-quality monitor operated by the Metropolitan Waste Control Commission, St. Paul, MN. EXTREMES FOR PERIOD OF DAILY RECORD.— SPECIFIC CONDUCTANCE (water year 1980, 1982): Maximum, 799 micromhos June 27, July 6, 20, 1980; minimum, 341 micromhos Aug. 3, 1980. pH (water year 1980, 1982): Maximum, 8.9 units Aug. 1, 1980; minimum, 6.7 units Jan. 23, 27, 1982. WATER TEMPERATURES (water year 1980, 1982): Maximum, 32.5°C July 10, 1980; minimum, 0.0°C several days during winter period. DISSOLVED OXYGEN (water year 1980, 1982): Maximum, 19.2 mg/L Oct. 16, 1979; minimum, 1.7 mg/L June 4, 1980. EXTREMES FOR CURRENT YEAR.— SPECIFIC CONDUCTANCE: Maximum, 637 micromhos July 29; minimum, 357 micromhos Apr. 22. pH: Maximum, 8.5 units Dec. 7, Aug. 19; minimum, 6.7 units Jan. 23, 27. WATER TEMPERATURES: Maximum, 27.5°C July 23, Aug. 4; minimum, 0.0°C several days during winter. DISSOLVED OXYGEN: Maximum, 15.5 mg/L Nov. 11; minimum, 2.4 mg/L July 21.

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 421 412 415 405 399 402 471 461 466 487 483 484 2 419 412 414 407 399 403 469 458 464 486 483 484 3 418 412 415 407 404 405 466 456 461 484 482 483 4 417 414 415 412 409 410 457 453 456 483 482 483 5 424 420 422 417 414 416 460 457 459 483 482 483 6 427 418 425 423 416 419 460 452 458 483 475 479 7 439 417 425 429 421 424 459 456 458 476 471 474 8 438 426 431 432 425 429 460 456 458 472 470 471 9 431 423 427 435 430 432 460 453 457 482 472 477 10 429 424 426 448 435 443 467 462 464 485 481 483 11 433 428 428 458 448 453 480 467 473 486 476 481 12 432 429 431 465 457 462 482 479 481 476 470 474 13 431 430 430 476 468 471 485 474 480 473 466 472 14 435 431 433 483 475 478 476 471 473 15 438 429 432 484 479 482 475 471 473 16 434 425 429 486 483 484 491 473 482 17 434 427 430 485 482 483 484 478 481 18 427 403 414 483 478 481 488 482 485 19 410 396 402 487 469 478 490 486 488 20 407 403 406 471 458 465 488 485 487 468 464 466 21 403 400 401 458 453 456 493 487 490 479 459 467 22 —— —— —— 459 453 456 493 481 487 472 470 472 23 —— —— —— 459 453 456 489 484 487 493 466 473 24 —— —— —— 460 456 458 493 487 490 483 473 477 25 —— —— —— 461 456 458 500 496 498 478 475 476 26 ______464 458 461 507 502 505 480 477 479 27 —— —— —— 462 459 461 502 500 501 494 482 486 28 402 390 397 462 459 461 499 495 497 494 492 493 29 404 392 398 462 459 461 498 495 496 492 488 490 30 412 400 406 463 459 461 499 487 493 489 487 488 31 413 403 408 489 485 487 489 488 489 MONTH 487 399 450 507 452 479 216 MISSISSIPPI RIVER MAIN STEM 05331578 MISSISSIPPI RIVER AT LOCK AND DAM 2 AT HASTINGS, MN—Continued SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 490 484 487 517 509 513 528 522 525 450 439 444 2 489 486 486 512 509 510 527 521 524 450 442 446 3 488 479 485 513 510 512 525 489 504 454 445 449 4 479 476 477 513 512 512 491 480 487 456 449 451 5 477 475 476 516 511 514 489 472 481 449 441 445 6 476 475 476 523 516 519 478 472 475 440 434 436 7 477 475 476 528 520 523 475 470 471 436 429 433 8 478 477 477 527 522 524 470 462 467 440 432 435 9 478 476 477 523 514 519 467 464 466 440 433 437 10 477 476 477 514 511 512 469 462 466 454 439 445 11 484 481 483 512 505 508 472 461 467 454 442 450 12 494 488 493 475 468 471 449 420 436 13 507 505 506 486 474 479 431 422 426 14 516 514 515 492 476 484 441 429 435 15 529 524 525 484 475 479 444 436 439 16 536 533 535 471 468 470 446 438 442 17 553 539 546 455 449 452 445 439 442 18 554 552 553 435 429 432 448 440 444 19 548 546 547 416 401 408 448 438 443 20 545 542 544 388 382 385 440 429 434 21 542 535 539 376 366 371 429 413 420 22 537 532 534 369 357 363 425 415 419 23 527 509 522 369 358 364 434 424 429 24 531 519 523 392 376 384 436 427 432 25 530 527 528 410 390 404 444 434 440 26 529 527 528 425 416 420 450 445 448 27 531 523 527 439 427 436 463 449 458 28 524 517 519 446 438 442 479 466 472 29 —— —— —— 446 440 443 487 478 482 30 —— —— —— 444 437 440 498 486 493 31 —— —— —— 531 523 528 500 492 495 MONTH 554 475 509 528 357 449 500 413 445

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 504 491 497 568 559 563 580 572 575 566 556 560 2 512 499 506 560 555 558 575 559 565 559 547 552 3 510 501 504 564 556 560 578 564 569 552 546 549 4 515 501 507 622 562 586 579 557 569 561 548 554 5 521 511 515 582 575 579 559 550 554 564 560 562 6 520 514 517 584 572 578 557 548 552 567 560 563 7 533 519 526 583 567 574 567 550 556 560 555 557 8 543 530 536 583 567 575 570 549 557 559 554 557 9 557 528 541 577 564 570 555 534 543 570 558 563 10 537 518 527 564 551 559 535 501 516 574 560 570 11 548 531 539 553 546 549 521 502 5lo 571 560 565 12 557 543 549 579 546 555 522 515 519 560 550 553 13 559 551 555 571 555 563 530 518 5^1 540 527 533 14 555 539 545 583 529 557 521 517 519 518 510 514 15 539 533 536 541 524 531 520 514 517 504 500 501 16 546 534 539 526 516 521 524 508 514 493 489 490 17 552 541 546 539 524 531 530 504 517 498 489 494 18 556 542 552 544 531 538 615 519 579 501 489 495 19 579 552 558 547 535 541 619 613 615 497 491 494 20 555 543 551 554 541 547 618 602 610 495 490 492 21 569 543 554 556 547 552 604 595 599 500 490 495 22 564 547 555 582 553 568 600 595 598 501 494 498 23 578 558 565 600 576 587 601 597 599 504 497 500 24 573 562 567 598 582 592 598 589 593 503 498 500 25 576 564 570. 585 568 576 595 588 591 504 496 500 26 588 567 576 569 563 565 593 586 590 505 500 502 27 588 569 578 575 561 568 590 583 586 506 502 504 28 605 578 587 591 569 573 588 572 579 509 504 506 29 585 570 576 637 587 604 572 564 567 516 509 512 30 590 565 573 591 582 586 578 564 569 516 513 514 31 —— —— —— 592 580 585 565 558 562 MONTH 605 491 545 637 516 564 619 501 562 574 489 525 217 MISSISSIPPI RIVER MAIN STEM 05331578 MISSISSIPPI RIVER AT LOCK AND DAM 2 AT HASTINGS, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

OCTOBER NOVEMBER DECEMBER JANUARY

1 7.9 7.8 7.8 7.5 7.4 7.4 7.8 7.7 7.7 7.6 7.5 7.6 2 8.0 7-8 7.9 7-5 7-4 7.4 7.8 7.7 7.8 7-9 7.7 7.8 3 7.9 7.8 7.8 7.6 7.4 7.5 7.8 7.7 7.7 7.9 7.8 7.9 4 8.1 7.8 7.8 7.8 7.4 7.6 8.2 7.7 7.9 7-9 7.8 7.9 5 7.9 7.7 7.8 7.7 7.6 7.7 8.3 7.9 8.0 7.9 7.7 7.8 6 7.8 7.7 7.8 7.7 7.6 7.6 7.9 7.8 7.9 8.1 7.6 7-9 7 7.9 7.7 7.8 7.8 7.6 7.7 8.5 7.8 8.1 8.1 7.5 7.8 8 7.8 7.7 7.8 7.7 7.6 7.7 8.1 7.9 8.0 7.8 7.3 7.4 9 7.8 7.8 7.8 7.7 7.6 7.7 8.0 7.8 7.9 7.7 7-1 7.4 10 7-9 7-7 7.8 7.7 7.6 7.7 7.8 7.6 7.7 7.7 7.5 7.6 11 8.0 7.7 7.8 7.8 7.7 7.7 7.6 7.5 7.5 7.6 7.4 7.5 12 7.9 7.9 7.9 7.7 7.7 7.7 7.6 7.5 7.5 7.5 6.8 7.4 13 8.0 7-9 7.9 7.7 7.6 7.7 7.6 7.5 7.5 7.7 7.5 7.6 14 7-9 7.9 7.9 7.7 7.6 7.6 7.8 7.6 7.7 15 7-9 7.7 7.8 7.7 7.6 7.6 7.7 7.6 7.7 16 7.8 7.7 7.8 7.7 7.6 7.6 7.7 7.6 7.6 17 7.8 7.7 7.8 7.7 7.6 7.6 7.7 7.5 7.6 18 7.8 7-7 7.8 7.8 7.7 7.7 7-7 7.3 7.4 19 7.9 7-8 7.8 7.7 7.6 7.6 7.4 7.2 7-3 20 7.9 7.8 7.9 7.7 7.7 7.7 7.6 7.2 7.3 7.9 7.4 7.6 21 7.8 7.8 7.8 7.8 7.6 7.7 7.3 7.1 7.2 7.8 7.2 7.4 22 —— —— —— 8.0 7.4 7.5 7.5 7.2 7.4 7.9 7.0 7.4 23 —— —— —— 7.6 7.3 7.4 7.6 7.3 7.4 7.4 6.7 7.1 24 —— —— —— 7.3 7.2 7.3 7.5 7.2 7.3 7.6 7.4 7.5 25 —— —— —— 7.2 7.0 7.1 7.3 7.2 7.3 7.6 7.3 7.5 26 ______7.1 6.9 7.0 7.4 7.2 7.4 7.4 7.0 7.2 27 —— —— 7.2 7.0 7.2 7.4 7.3 7.3 8.3 6.7 7.4 28 7.6 7.5 7.5 7.2 7.1 7.2 7.3 7.2 7.3 7.8 7.7 7.7 29 7-5 7.4 7.5 7.2 7.1 8.2 7.3 7.2 7-3 8.0 7.7 7.8 30 7.5 7.5 7-5 8.1 7.2 7.5 7.7 7.2 7.5 8.1 8.0 8.0 31 7.5 7.5 7.5 7.7 7.6 7.7 8.0 7.9 8.0 MONTH 6.9 7.6 8.5 7.1 7.6

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY

1 7.9 7.7 7.8 8.2 8.1 8.2 8.2 8.1 8.2 8.2 8.0 8.1 2 8.2 7.9 8.1 8.3 8.2 8.3 8.2 8.1 8.2 8.3 8.0 8.1 3 8.2 7.8 8.0 8.3 8.1 8.2 8.2 7.9 8.1 8.2 8.1 8.1 4 7.8 7.7 7.8 8.1 8.1 8.1 8.1 7.8 7.9 8.2 8.1 8.1 5 8.4 7.8 8.0 8.2 8.1 8.1 7.9 7.7 7.8 8.1 8.0 8.0 6 8.4 7.6 7.8 8.2 8.2 8.2 7.8 7-7 7.7 8.0 7.9 7.9 7 8.0 7.6 7.9 8.2 8.1 8.1 7.8 7.6 7.7 8.1 7.9 8.0 8 8.0 7.8 7.9 8.1 8.0 8.1 7.7 7-6 7.6 8.2 8.0 8.1 9 7.9 7.7 7.8 8.0 7.9 7.9 7.7 7.6 7.6 8.1 7.9 8.0 10 7.9 7-7 7.8 8.3 7.8 8.0 7.7 7.6 7.6 8.4 7.9 8.0 11 8.2 7.9 8.1 8.3 7.8 7.6 7.7 8.2 7.9 8.1 12 8.2 7.6 8.0 7.8 7.7 7.8 8.1 7.9 7.9 13 8.3 7.6 8.0 7.9 7.8 7.9 8.0 7.9 7.9 IH 8.3 8.0 8.2 8.1 7.9 8.0 8.0 7.9 7.9 15 8.4 8.2 8.3 8.0 7.9 8.0 16 8.4 8.0 8.2 8.0 7.9 8.0 17 8.3 7.8 8.0 8~3 8.0 7.9 7.9 18 7.9 7.8 7.9 8.2 8.3 7.9 7.8 7.9 19 7-9 7.9 7.9 8.3 8.2 8.2 8.0 7.8 7.9 20 8.0 7.9 7.9 8.2 8.1 8.1 8.1 7.8 8.0 21 8.0 7.6 7.7 8.1 8.0 8.1 8.0 7.9 7.9 22 8.0 7.6 7.7 8.2 8.1 8.2 7.9 7.8 7.9 23 8.2 8.0 8.1 8.2 8.0 8.1 7.9 7.8 7.9 24 8.2 8.1 8.1 8.2 8.0 8.1 8.2 7.8 7.9 25 8.2 8.1 8.1 8.3 8.1 8.2 8.3 7.8 7.9 26 8.1 8.1 8.1 8.3 8.1 8.2 8.0 7-8 7.9 27 8.2 8.1 8.1 8.4 8.2 8.3 7.9 7.8 7.8 28 8.2 8.2 8.2 8.3 8.1 8.2 7.9 7.8 7.9 29 8.2 8.0 8.1 7.9 7.8 7.8 30 8.2 8.0 8.1 7.9 7.8 7.8 31 8.2 8.0 7.7 7.9 MONTH 7.6 8.4 7.7 218 MISSISSIPPI RIVER MAIN STEM 05331578 MISSISSIPPI RIVER AT LOCK AND DAM 2 AT HASTINGS, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 8.0 7.9 7.9 8.4 8.1 8.2 7.9 7.8 7.8 8.2 7.8 7.9 2 8.0 7.9 7.9 8.2 8.1 8.1 8.1 7.7 7.9 7.9 7.8 7.9 3 7.9 7.8 7.8 8.2 8.0 8.1 8.1 8.0 8.0 8.0 7.8 7.9 4 7.8 7.7 7.8 8.4 8.1 8.2 8.3 8.0 8.1 7.9 7.8 7.9 5 7.9 7.8 7.8 8.3 8.1 8.2 8.1 8.0 8.0 7.9 7.8 7.9 6 8.4 7.8 7.9 8.2 8.1 8.1 8.1 7-9 8.0 7.9 7.7 7.8 7 8.1 7.8 7.9 8.1 8.0 8.0 8.0 7.9 8.0 7.9 7.8 7.9 8 7.9 7.9 7.9 8.0 7.9 8.0 7.9 7.8 7.9 7.9 7.8 7.9 9 8.1 7.8 7.9 8.0 7.8 7.9 7.7 7.6 7.7 7.9 7.9 7.9 10 8.0 7.9 7-9 7.9 7.8 7.8 8.2 7.5 7.9 8.0 7.9 8.0 11 8.0 7.9 7.9 7.8 7.7 7.8 8.2 8.0 8.0 8.1 7.9 8.0 12 8.0 7.9 7.9 8.0 7.8 7.8 8.1 8.0 8.0 8.0 7.9 8.0 13 8.0 7.9 7.9 8.1 7.8 7.8 8.0 7.9 8.0 7-9 7.8 7.9 14 8.0 7.9 7.9 8.0 7.8 7.9 8.0 7.9 7-9 7.8 7.7 7.8 15 7.9 7.8 7.9 7.9 7.8 7.8 7.9 7.8 7.9 7.8 7.7 7.8 16 8.0 7.9 7.9 7.8 7.7 7.8 8.1 7.8 7.9 8.0 7.8 7.9 17 8.0 7.8 7.9 7.8 7.7 7.8 8.4 7.7 7-9 8.0 7.9 7.9 18 8.0 7.9 8.0 7.9 7.7 7.8 8.3 7.7 8.1 7.9 7-8 7.9 19 8.0 7.9 8.0 8.0 7.8 7.9 8.5 8.1 8.2 7-9 7.8 7.8 20 8.0 7.9 8.0 8.0 7.8 7.9 8.2 8.0 8.1 7.9 7.8 7.9 21 8.0 7.9 8.0 8.0 7-8 7.9 8.2 7.9 8.0 8.1 7.9 8.0 22 8.0 7-9 8.0 8.1 7.9 8.0 8.0 7.9 8.0 8.1 8.0 8.1 23 8.1 8.0 8.0 8.1 7.9 8.0 8.1 7.9 8.0 8.1 8.0 8.0 24 8.0 7.9 8.0 8.1 7.8 7.9 8.0 7.9 7.9 8.2 8.0 8.1 25 8.1 7.9 8.0 7.9 7.8 7.8 8.0 7.8 7.9 8.1 8.0 8.0 26 8.2 7.9 8.0 7.8 7-7 7.7 8.0 7-9 8.0 8.1 8.0 8.0 27 8.3 8.0 8.1 7-9 7.6 7.8 8.1 7.9 8.0 8.0 8.0 8.0 28 8.3 8.1 8.2 7-9 7.8 7.8 7-9 7.8 7.9 8.3 8.0 8.1 29 8.2 8.0 8.1 8.0 7.8 7-9 7.9 7.8 7.8 8.2 8.1 8.1 30 8.3 8.0 8.1 8.0 7.9 7.9 8.1 7.8 7.9 8.2 8.0 8.1 31 —— —— —— 8.0 7.8 7.9 7.9 7.7 7.8 MONTH 7.7 8.4 7.6 7.5 1.3 7.7

TEMPERATURE WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 14.0 12.5 13.0 8.5 7.5 8.0 1.5 1.0 1.0 .0 .0 2 12.5 12.0 12.0 8.5 7.0 8.0 1.0 1.0 1.0 .0 .0 3 12.0 11.5 11.5 8.5 7.5 8.0 1.0 .0 .5 .0 .0 4 11.5 11.0 11.5 9.0 8.0 8.5 .5 .0 .0 .0 .0 5 12.0 11.5 12.0 8.5 8.0 8.5 .5 .0 .5 .0 .0 6 12.0 11.5 11.5 7.5 7.0 7-5 .5 .5 .5 .0 .0 7 12.5 11.0 11.5 8.0 6.5 7.0 .5 .5 .5 .0 .0 8 12.5 11.5 11.5 7.5 6.5 7.0 .5 .0 .5 .0 .0 9 12.0 11.0 11.5 6.0 5.0 5.5 .5 .0 .0 .0 .0 10 12.0 11.0 11.5 6.0 5.0 5.5 .5 .0 .5 .0 .0 11 12.0 11.0 11.5 6.0 4.5 5.0 .5 .5 .5 .0 .0 12 12.0 11.5 12.0 5.5 5.0 5.0 .5 .5 .5 .0 .0 13 12.0 12.0 12.0 6.0 5.0 5.5 .5 .5 .5 .0 .0 14 12.5 12.0 12.5 7.0 6.0 6.5 .5 .0 .5 15 13.0 12.5 13.0 7.0 6.5 7-0 .5 .0 .0 16 13.5 12.0 12.5 7.5 6.5 7.0 .5 .0 ,.0 17 13.0 13.0 13.0 7.0 6.5 6.5 .5 .0 .5 18 12.5 9.0 11.0 6.5 5.5 6.5 .5 .0 .0 19 10.0 8.0 9.0 5.5 4.5 5.0 .5 .0 .0 20 10.5 10.0 10.0 4.5 3.0 3.5 .5 .0 .0 .0 21 10.0 9.0 9.5 3.0 2.0 2.5 .5 .5 .5 .0 22 2.0 1.5 2.0 .5 .5 .5 .0 23 2.0 1.5 1.5 .5 .0 .5 .0 24 2.0 1.5 1.5 .5 .0 .0 .0 25 2.0 1.5 1.5 .0 .0 .0 .0 26 2.0 1.5 2.0 .0 .0 .0 .0 27 2.0 1.0 1.5 .0 .0 .0 .0 28 6.0 5.0 5.5 1.0 1.0 1.0 .0 .0 .0 .0 29 6.5 5.5 6.0 1.5 1.0 1.0 .0 .0 .0 .0 30 8.0 6.5 7.0 1.5 1.0 1.0 .0 .0 .0 .0 31 8.5 7.5 8.0 .0 .0 .0 .0

MONTH 1.0 5-0 1.5 219 MISSISSIPPI RIVER MAIM STEM

05331578 MISSISSIPPI RIVER 4T LOCK AND DAM 2 AT HASTINGS, MM—Continued

TEMPtiRAJMRE, WATER (DEG. G), WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982

OAY MAX MIM MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MR AN

FEBRUARY APRIL MAY

0 .0 .0 1.0 .5 .5 5.0 4.0 4.5 16.0 13-5 14.5 0 .0 .0 1.0 .5 .5 5.5 4.5 5.0 16.5 14.5 15.5 ,0 .0 .0 1.5 .5 1.0 5.5 1.5 3.0 17.0 15.5 16.0 0 .0 .0 1.5 1.5 1.5 3.5 .5 2.0 18.5 16.5 17.0 0 .0 .0 1.5 1.5 1.5 3.0 1.5 2.0 18.0 16.0 17.0 6 0 .0 .0 1.5 1.5 1.5 3.0 1.0 2.0 16.0 15.5 15.5 7 ,0 .0 .0 1.5 1.5 1.5 2.5 2.0 2.0 16.0 14.5 15.5 8 ,0 .0 .0 1.5 1.0 1.5 2.5 1.5 2.0 17.0 15.5 16.0 9 0 .0 .0 1.0 1.0 1.0 2.5 1.5 2.0 17.0 15.5 16.5 10 0 .0 .0 1.0 1.0 1.0 2.5 2.0 2.0 18.5 16.5 17.0

11 ,0 .0 .0 1.5 1.0 1.5 4.0 1.5 2.5 19.0 17.5 18.0 12 0 .0 .0 4.0 2.5 3.5 18.5 16.0 17.0 13 0 .0 .0 5.5 3.5 4.5 16.5 16.0 16.5 14 5 .0 .0 7.0 4.5 5.5 17.5 16.5 17.0 15 5 .0 .5 7.5 6.5 7.0 18.0 17.0 17.5

16 5 .5 .5 9.0 7.5 8.0 18.5 17.5 18.0 17 5 .5 .5 9.0 8.0 8.5 18.5 17.5 18.0 18 5 .5 .5 9.0 7.5 8.5 18.5 17.0 18.0 19 5 .5 .5 8.5 7.0 8.0 20.5 17.5 19.0 20 5 .5 .5 8.5 6.5 7.5 20.0 18.5 19.0

21 5 .5 .5 9.0 7.0 8.0 18.5 17.0 17.5 22 5 .5 .5 10.0 7.5 9.0 17.5 17.0 17.0 23 5 .5 .5 11.0 8.5 9.5 18.5 16.5 17.5 24 5 .5 .5 12.0 9.5 11.0 18.5 17.0 18.0 25 5 .5 .5 13.0 11.0 12.0 18.5 17.5 18.0 26 5 .5 .5 13.5 11.0 12.5 18.5 17.5 17.5 27 5 .5 .5 14.5 12.0 13.5 18.0 17.0 17.5 28 5 .5 .5 14.5 12.5 13.5 19.5 18.0 18.5 29 14.5 13.0 14.0 20.0 18.5 19.5 30 14.0 13.0 14.0 21.0 19.0 20.0 31 5.0 4.5 5.0 20.5 19.0 19.5

MONTH .5 .0 .5 14.5 .5 7.0 21.0 13.5 17.5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER

1 20.0 18.0 19.0 24.0 21.5 22.5 24, 23.0 23.5 21.0 18.5 19.5 2 19.5 18.0 19.0 23.0 22.0 22.5 24. 23.5 24.0 20.0 18.5 19.0 3 19.5 18.0 18.5 24.0 22.0 23.0 25. 24.5 25.0 18.5 18.0 18.5 4 19.5 18.0 19.0 27.0 23.0 24.5 27.5 25.0 25.5 19.0 18.0 18.5 5 19.5 18.5 19.0 25.5 24.5 25.0 26.5 25.5 26.0 19.5 19.0 19.0

6 19.0 18.0 18.5 25.5 24.5 25.0 26.5 25.5 26.0 19.0 18.0 18.5 7 19-5 17.5 18.5 24.5 23.5 24.0 26.5 25.5 26.0 18.0 17.5 17.5 8 20.0 19.0 19.5 24.5 22.5 23.5 26.0 23.5 24.5 17.5 17.0 17.5 9 20.0 18.0 19.5 25.0 24.0 24.5 23.0 21.0 21.5 19.0 17.5 18.0 10 19.5 17.0 18.0 24.5 22.5 23.5 21.0 20.0 20.5 19.5 18.5 19.0

11 20.0 18.5 19.5 22.5 21.5 22.0 21.5 20.0 21.0 21.0 19.5 20.0 12 20.5 19.0 20.0 25.0 22.5 23.5 21.0 20.5 21.0 21.0 20.0 20.5 13 21.0 19.5 20.0 25.5 23.5 24.0 21.0 20.0 20.5 20.0 18.0 19.0 14 20.5 19.5 20.0 25.5 23.5 24.5 21.5 20.0 20.5 18.5 16.5 17.5 15 20.0 19.0 19.5 24.5 24.0 24.0 22.0 21.0 21.5 16.5 16.0 16.0 16 19.5 18.0 19.0 25.0 23.0 24.0 24.5 22.0 22.5 16.0 15.5 16.0 17 19.5 18.5 19.0 25.5 24.5 25.0 26.0 22.0 23.5 16.5 15.5 16.0 18 19.0 18.0 18.5 25.5 24.0 25.0 24.5 22.5 23.5 17.0 16.0 16.5 19 19.0 18.0 18.5 26.0 24.5 25.0 25.5 23.5 24.0 17.0 15.5 16.0 20 18.5 17.5 18.0 26.0 24.5 25.0 24.0 23.0 23.5 16.0 15.0 15.5

21 19.0 17.5 18.0 26.0 24.5 25.0 23.5 22.5 23.0 15.0 14.0 14.5 22 20.0 18.0 19.0 27.0 24.5 25.5 23.0 22.0 22.5 15.0 14.0 14.5 23 21.0 19.0 19.5 27.5 25.0 26.0 23.0 22.0 22.5 16.0 14.5 15.0 24 20.0 19.0 19.5 26.5 25.5 25.5 22.5 21.0 22.0 15.5 14.5 15.0 25 21.0 19.0 20.0 26.5 25.5 26.0 22.0 21.0 21.5 15.0 14.0 14.5 26 22.0 19.0 20.5 26.0 25.0 25.0 21.5 21.0 21.5 14.5 13.5 14.0 27 23.5 20.5 22.0 26.0 24.0 25.0 21.0 20.0 20.5 15.0 14.0 14.5 28 25.0 22.0 23.0 25.0 24.5 24.5 20.0 19- 20.0 15.0 14.5 14.5 29 23.0 21.5 22.0 25.0 23.5 24.0 19.5 18. 19.0 16.0 15.0 15.5 30 24.0 21.0 22.0 23.5 22.5 23.0 21.5 18, 19.5 16.5 15.5 16.0 31 23.5 22.5 23.0 19.0 18.5 18.5

MONTH 25.0 17.0 19.5 27.5 21.5 24.5 27.5 18.5 22.5 21.0 13.5 17.0 220 M1S.SCSSLPPI RIVER MAIN STEM 05331578 MISSISSIPPI KIVER AT LOCK AND DAM 2 AT HASTINGS, MN--Contlnued OXYGEN, DISSOLVED (DO), MCf/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX WIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 11.7 8.5 10.5 12.5 12.0 12.4 14.3 13.7 14.0 12.7 12.5 12.5 2 13.9 10.2 11.9 14.3 11.1 13.1 13.8 13.3 13.6 12.6 12.2 12.4 3 12.5 10.9 11.4 15.4 13.6 14.4 13.5 12.9 13.2 12.2 11.8 12.0 4 11.7 8.4 10.7 14.4 13.4 13.9 13.4 12.4 12.8 11.9 11.6 11.7 5 8.6 6.9 7.4 13.3 11.9 12.5 13.2 12.2 12.7 11.8 11.6 11.7 6 9.0 6.7 7.6 12.3 11.6 12.1 13.6 12.7 13.2 12.1 11.6 11.9 7 9.6 8.7 9.0 13.2 12.1 12.6 14.0 11.2 13.3 12.1 11.7 12.0 8 10.2 9.1 9.7 12.9 11.9 12.3 13.3 12.5 12. Q 12.1 11.8 12.0 9 10.9 9.8 10.2 12.9 11.8 12.3 13.5 13.0 13.1 11.9 11.4 11.6 10 11.3 8.7 10.5 13.3 12.2 12.7 13.0 11.9 12.3 11.6 11.2 11.4 11 11.5 9.1 10.4 15.5 12.6 13.3 13.9 12.5 13.0 11.5 11.1 11.3 12 11.0 10.2 10.5 15.4 12.9 14.1 13.2 12.5 12.8 11.7 10.8 11.2 13 10.9 9.7 10.3 14.9 12.8 13.4 13.3 12.2 12.8 11.8 11.2 11.6 14 10.8 9.9 10.3 15.4 12.5 13.8 13.0 12.1 12.6 15 8.7 7.0 7.8 15.2 12.3 12.7 13.5 12.1 12.8 16 12.4 6.4 8.4 14.8 12.0 12.8 14.2 13.2 13.6 17 10.9 10.2 10.5 14.8 12.3 13.0 14.4 12.8 13.7 18 14.0 10.8 12.9 14.8 11.9 12.9 14.3 12.9 13.8 19 14.5 13.8 14.1 12.0 11.3 11.7 14.4 13.3 13.8 20 14.7 12.0 13.8 12.4 11.6 12.0 14.1 13.0 13.7 10.5 10.4 10.4 21 14.2 13.9 14.0 13.2 12.0 12.5 14.0 12.7 13.7 10.4 10.2 10.3 22 —— —— —— 13.2 12.6 12.9 14.0 12.6 13-5 10.7 9.9 10.4 23 —— —— 13.6 12.9 13.2 13.8 12.4 13.4 10.8 10.4 10.6 24 —— —— 13.6 12.8 13.1 13.7 12.5 13.2 10.8 10.6 10.7 25 —— —— —— 13.6 13.1 13.3 13.6 13.3 13.4 11.2 10.8 11.0 26 __ — -._. ___ 14.2 13.4 13.9 13.7 12.3 12.7 11.2 11.0 11.1 27 — ______14.1 13.4 13.7 12.8 12.7 12.7 11.3 10.3 10.8 28 13.0 12.5 12.8 14.2 13.5 13.8 13.0 12.6 12.8 10.7 10.1 10.3 29 13.4 12.1 12.7 14.6 13.7 14.0 13.1 12.4 12.7 10.8 10.5 10.6 30 12.8 11.8 12.6 14.5 14.1 14.2 13.6 12.7 13.2 10.5 10.2 10.3 31 12.6 11.6 12.1 12.8 12.5 12.6 10.7 9.9 10.2 MONTH 15.5 11.1 13.1 14.4 11.2 13.2

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 10.1 9.6 9.7 10.1 8.1 9.1 11.9 11.6 11.8 11.0 9.5 10.2 2 10.2 9.7 9.8 10.4 9.9 10.2 12.4 11.7 12.1 11.5 9.3 10.4 3 10.0 9.7 9.9 11.5 10.0 10.7 12.4 11.7 12.0 10.3 9.3 9.8 4 11.4 10.9 11.2 12.5 11.3 12.0 10.0 7.9 9.0 5 11.5 10.9 11.3 12.5 11.3 12.8 9.0 8.2 8.7 6 11.6 ll.l 11.3 12.8 11.5 12.1 9.3 8.2 8.6 7 11.8 11.0 11.4 12.8 12.0 12.4 10.6 8.5 9.5 8 11.8 10.9 11.2 13.3 12.7 13.0 11.2 9.5 10.3 9 11.8 11.0 11.4 13.0 12.3 12.7 10.2 8.2 9.1 10 11.9 11.5 11.8 12.9 12.2 12.6 8.5 7.4 7.9 11 12.0 11.6 11.8 12.9 12.0 12.4 9.6 6.5 8.1 12 12.9 10.7 11.7 13.1 12.0 12.6 9.7 7.9 8.4 13 11.6 10.7 11.2 12.4 12.0 12.2 8.8 7.8 8.2 14 11.4 10.6 11.1 12.4 11.9 12.2 8.5 7.2 7.8 15 11.2 10.9 11.1 11.5 10.6 11.0 8.2 6.7 7.3 16 ______11.1 11.0 11.1 10.9 10.3 10.6 8.1 6.6 7.0 17 10.4 9.9 10.2 11.3 10.5 11.1 11.1 10.4 10.7 7.2 5.8 6.2 18 10.3 9.9 10.1 11.4 10.8 11.1 6.8 5.5 6.3 19 10.5 9.9 10.3 11.4 10.8 11.2 9-7 6.2 7.8 20 10.6 10.3 10.4 11.6 11.3 11.5 10.0 7.6 8.7 21 10.6 9.1 9.5 12.1 11.7 11.9 9.9 9.0 9.4 22 9.4 9.1 9.3 12.3 11.6 12.0 9.8 8.8 9.3 23 9.3 8.2 8.8 12.2 11.6 11.7 10.2 8.9 9.4 24 8.5 8.2 8.4 12.0 10.6 11.7 9.7 7.9 9.0 25 8.6 8.2 8.4 11.9 10.9 11.2 9.7 7.9 8.8 26 8.4 8.0 8.2 11.8 7.8 10.1 9.5 7-5 8.5 27 8.3 7.9 8.1 11.9 9.8 10.8 7.9 7.3 7.6 28 8.5 7.9 8.3 11.7 10.2 11.1 7.7 6.9 7.3 29 —— —— 11.4 9.8 10. 5 8.0 7.3 7.6 30 —— —— 10.8 9.7 io.2 7.5 6.8 7.2 31 —— —— 12.4 11.9 12.1 7.9 6.8 7.3 MONTH 13.3 11.7 11.5 5.5 8.4 MISSISSIPPI RIVER MAIN STEM 221 05331578 MISSISSIPPI RIVER AT LOCK AND DAM 2 AT HASTINGS, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 7-9 7.2 7.5 9.4 8.0 8.7 6.8 4.9 5.7 8.2 5.6 6.6 2 9.9 6.8 8.2 8.8 7.9 8.3 7.6 4.5 6.5 8.4 6.2 7.3 3 8.8 7.7 8.1 8.3 7.4 7.8 7.6 6.3 6.8 8.3 7.7 7.9 4 8.2 7.1 7.6 9.3 7.2 8.2 8.7 6.0 7.4 8.0 7.2 7.6 5 8.2 7.2 7.7 8.6 6.2 7.1 —— —— —— 7.4 5.9 6.5 6 8.0 6.1 7.4 8.1 6.5 7.3 —— —— —— 7.6 5.6 6.8 7 8.4 6.1 7.5 8.5 6.8 7.5 —— —— —— 7.7 7.1 7.4 8 8.2 7.5 7.8 8.2 6.7 7.4 —— —— —— 7.4 6.2 6.6 9 9.2 6.2 8.0 7.3 6.0 6.6 —— —— —— 6.5 5-9 6.2 10 10.0 8.5 9.1 6.5 5.2 5.8 —— —— —— 8.0 6.0 7.0 11 9.6 8.2 8.7 8.5 6.4 7.2 —— —— —— 9-2 7.4 8.2 12 9.4 7.8 8.2 8.0 5.2 6.6 —— —— —— 8.8 7.5 8.1 13 9.6 7.2 8.7 7.5 5.4 6.1 —— —— —— 7.4 6.5 7.0 14 9.4 7-0 8.4 7.8 5.9 6.8 —— —— —— 6.6 6.0 6.3 15 8.6 7.9 8.2 7.0 5.6 6.1 —— —— —— 9.2 6.3 8.0 16 8.2 7.0 7.6 6.5 5.3 5.7 —— —— —— 9.0 6.0 7.9 17 7.5 6.6 7.0 6.4 4.9 5.6 —— —— —— 7.8 5.0 6.3 18 7.5 6.5 7.0 7.1 5.2 5.9 —— —— —— 6.3 5.1 5.8 19 7.1 6.4 6.7 7.2 5-5 6.3 9.3 6.5 7.5 9.2 5.6 7.1 20 7.6 6.4 6.8 5.7 2.9 3-9 8.0 6.5 7.4 8.7 7-7 8.2 21 7.0 6.5 6.8 7.3 2.4 5.2 8.7 6.2 7.3 9.1 7.9 8.5 22 9.1 6.0 7.4 8.4 6.1 7.3 7.2 6.2 6.7 8.9 8.0 8.5 23 9-6 7.1 8.2 8.8 4.9 7.3 7.9 5.7 6.9 8.7 7.7 8.0 24 8.6 7.5 8.1 7.5 5.2 6.6 7.5 6.1 6.7 8.5 5.4 6.7 25 8.2 7.3 7.6 6.5 5.4 5.9 6.9 5.7 6.3 9.0 8.1 8.4 26 9.7 7.2 8.1 6.0 5.2 5.5 7.3 6.0 6.8 8.6 8.1 8.3 27 9.6 7.1 8.1 8.2 4.6 6.5 8.3 6.6 7.4 9.0 8.2 8.6 28 7.9 6.7 7.1 8.0 6.6 7.4 7.4 6.1 6.7 8.3 7.6 8.0 29 7.5 6.1 6.4 7.6 5.6 7.0 7.1 6.2 6.7 8.5 8.1 8.3 30 8.9 6.6 7.8 7.8 5.5 7.1 8.2 5-3 6.7 11.0 7.7 9-1 31 —— —— —— 7.6 5.2 6.5 6.1 5.2 5.8 —— —— —— MONTH 10.0 6.0 7.7 9-4 2.4 6.7 11.0 5.0 7.5 "^ ST. CROIX RIVER BASIN 05336700 KETTLE RIVER BELOW SANDSTONE, MN LOCATION.—Lat 46°06'20", long 92°51'50", in NW4SW4 sec.22, T.42 N., R.20 W., Pine County, Hydrologic Unit 07030003, on Sandstone Federal Correctional Institution property, on left bank about 900 ft (274 m) downstream from abandoned powerplant dam, 1.8 mi (2.9 km) south of Sandstone. DRAINAGE AREA.—863 mi 2 (2,240 km 2 ). PERIOD OP RECORD.—October 1967 to current year. GAGE.—Water-stage recorder and crest-stage gage. Datum of gage is 931.50 ft (283.921 m) National Geodetic Vertical Datum of 1929. (Minnesota Department of Transportation bench mark).

REMARKS.—Records good except those for winter periods, which are fair. AVERAGE DISCHARGE.—15 years, 692 ftVs (19.60 m 3 /s), 10.89 in/yr (277 mm/yr). EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 17,200 ft 3 /s (487 m3/s) July 23, 1972, gage height, 15-38 ft (4.688 m); minimum, 25 ft3/s (0.71 m3/s) Nov. 11-12, 1977, gage height, 3.37 ft (1.027 m) result of freezeup.

EXTREMES OUTSIDE PERIOD OF RECORD.—Flood in April 1965 reached a stage of 12.96 ft (3-950 m) from flood marks, discharge, 13,400 ftVs (379 nP/s). EXTREMES FOR CURRENT YEAR.—Peak discharge above base of 3,600 ftVs (102 m 3 /s) and maximum (*) Discharge Gage height Date Time (ft 3 /s) (nP/s) (ft) (m) Oct. 19 0045 3730 106 7.66 2.335 Apr. 18 *12000 340 *12.56 3.828 Minumum discharge, 125 ft 3 /s (3-54 mVs) Aug. 18, gage height 4.04 ft (1.231 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 228 790 254 184 158 142 1520 1180 507 206 264 170 2 274 729 254 181 158 146 2530 1080 447 194 243 181 3 319 686 254 178 157 144 2760 1000 364 188 231 181 4 470 641 234 174 157 144 2410 907 358 182 217 175 5 930 601 211 172 156 144 2420 1480 339 172 206 217 6 1010 566 252 170 156 144 2250 2340 321 351 192 259 7 1020 532 247 169 155 145 2140 2320 315 1060 181 259 8 963 514 240 168 155 145 2070 2090 297 1100 171 237 9 891 475 222 168 154 145 1990 1830 297 980 162 216 10 859 458 167 167 154 145 1930 1750 325 997 154 254 11 859 438 216 167 153 145 1700 1790 366 1160 147 508 12 818 421 211 166 153 N 145 I960 1760 §58 1110 138 692 13 779 424 206 165 152 147 2490 1880 330 979 134 705 14 1980 422 194 164 152 148 3760 2330 321 830 134 760 15 3140 414 188 164 151 149 5890 2580 322 691 134 789 16 2770 406 175 163 151 151 8720 2620 302 673 133 924 17 2430 394 175 163 150 152 10500 2350 263 717 130 948 18 3240 375 168 162 150 157 11500 2420 254 610 130 912 19 3570 353 168 162 151 160 9800 2720 248 511 242 820 20 3030 333 168 161 151 154 8000 2450 243 452 239 705 21 2550 276 165 161 149 160 6300 2130 236 433 227 629 22 2190 248 164 161 148 180 5200 1830 228 453 218 562 23 1850 260 164 160 146 180 4200 1560 224 471 206 510 24 1560 259 164 160 142 189 3500 1310 227 425 199 468 25 1340 254 164 160 142 188 2900 1110 228 383 178 435 26 1170 257 164 160 141 188 2400 967 220 363 174 405 27 1090 263 160 160 142 188 2030 855 206 341 178 375 28 1010 263 158 159 142 202 1720 744 204 303 170 356 29 952 262 155 159 —— 207 1460 665 214 291 165 350 30 903 257 174 159 255 1310 615 214 292 164 356 31 853 195 158 —— 543 —— 562 —— 289 158 —— TOTAL 45048 12571 6031 5125 4226 5432 117360 51225 8778 17207 5619 14358 MEAN 1453 419 195 165 151 175 3912 1652 293 555 181 479 MAX 3570- 790 254 184 158 543 11500 2720 507 1160 264 948 MIN 228 248 155 158 141 142 1310 562 204 172 130 170 CFSM 1.68 .49 -23 -19 .18 .20 4.53 1.91 .34 .64 .21 .56 IN. 1.94 .54 .26 .22 .18 .23 5.06 2.21 .38 • 74 .24 .62 AC-FT 89350 24930 11960 10170 8380 10770 232800 101600 17410 34130 11150 28480 CAL YR 1981 TOTAL 255185 MEAN 699 MAX 5380 MIN 80 CFSM .81 IN 11 .00 AC-FT 506200 WTR YR 1982 TOTAL 292980 MEAN 803 MAX 11500 MIN 130 CFSM .93 IN 12 .63 AC-FT 581100 NOTE.--No gage-height record Apr. 17-28. 223 ST. CROIX RIVER BASIN 05337050 KETTLE RIVER NEAR CLOVERDALE, MN LOCATION.—Lat 45°54'13", long 92°43'47", in SW4SWJ sec. 33, T.40 N., R.19 W., Pine County, Hydrologic Unit 07030003, St. Croix National Scenic Riverway, 200 ft (6l m) west of Town Road, 8.0 mi (12.9 km) south of Cloverdale, Minnesota and 9-0 mi (14.5 km) northwest of Grantsburg, Wisconsin. DRAINAGE AREA. —1,050 mi 2 (2,720 km 2 ).

PERIOD OP RECORD.—May 1975 to current year. REMARKS,—Letter K indicates non-ideal colony count.

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

OXYGEN, COLI- STREP- SPE­ DIS­ FORM, TOCOCCI STREAM- CIFIC SOLVED FECAL, FECAL, PLOW, CON­ PH OXYGEN , (PER­ 0.7 KF AGAR INSTAN­ DUCT­ (STAND­ TEMPER­ DIS­ CENT UM-MF (COLS. TIME TANEOUS ANCE ARD ATURE SOLVED SATUR­ (COLS./ PER DATE (CFS) (UMHOS) UNITS) (DEG C) (MG/L) ATION ) 100 ML) 100 ML) (00061) (00095) (00400) (00010) (00300) (00301) (31625) (31673) APR 16... 1630 8780 66 6.9 4.5 11.9 95 100 1400 AUG 25... 1240 214 167 8.5 20.5 9.7 112 K10 370

NITRO- SEDJ- ALKA­ CHLO­ NITRO­ NITRO­ GEN, AM­ PHOS­ MENT, LINITY RIDE, GEN, GEN, MONIA + PHOS­ PHORUS, SEDI­ DIS­ LAB DIS­ NITRITE AMMONIA ORGANIC PHORUS , DIS­ MENT, CHARGE, (MG/L SOLVED TOTAL TOTAL TOTAL TOTAL SOLVED SUS­ SUS­ AS (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L PENDED PENDED DATE CAC03) AS CL) AS N) AS N) AS N) AS P) AS P) (MG/L) (T/DAY) (90410) (00940) (00615) (00610) (00625) (00665) (00666) (80154) (80155) APR 16... 21 1.7 <.010 .080 1.80 .080 — 46 1090 AUG 25... 79 4.2 <.010 <.010 .10 .030 .030 3 1.7 224 ST. CROIX RIVER BASIN 05337400 KNIFE RIVER NEAR MORA, MN LOCATION.—Lat 45°55'12", long 93°l8'26", in SW4SW4 sec.26, T.40 N., R.24 W., Kanabec County, Hydrologic Unit 07030004, on left 'bank 400 ft (122 ra) upstream from bridge on County Highway 77, 1.1 mi (1.8 km) upstream from mouth and 2.5 mi (4.0 km) north of Mora. DRAINAGE AREA.--102 mi 2 (264 km2 ). PERIOD OP RECORD.—Occasional low-flow measurements, water years 1969-74; July 1974 to current year. GAGE.--irfater-stage recorder. Datum of gage is 991.20 ft (302.118 m) National Geodetic Vertical Datum of 1929- (Kanabec County bench mark). REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.—8 years, 55.4 ft 3 /s (1.569 m3 /s), 7.38 in/yr (187 mm/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 1,840 ft 3 /s (52.1 m 3/s) May 10, 1979, f?age height, 6-31 ft (1.923 m); maximum gage height, 6.69 ft (2.039 m) Nov. 24, 1977, from floodmark (backwater from ice); minimum daily discharge, 1.1 ft 3/s (0.031 mVs) Jan. 12 to Peb. 9, 1977. EXTREMES OUTSIDE PERIOD OP RECORD.--Flood of July 26, 1972, reached a stage of 14.0 ft (4.267 m), from information by local resident (discharge not determined). Result of dam failure and backwater from collapsed bridge. EXTREMES POR CURRENT YEAR.—Peak discharge aboye base of 500 ft 3/ s (14.2 m 3 /s) and maximum (*): Discharge Gage height Date Time (ft3/s) (m 3 /s) (ft) (m) Apr. 4 0900 683 19-3 4.60 1.402 Apr. 16 1615 *1440 40.8 *5.71 1.740 Minimum discharge, 4.3 ft 3 /s (0.12 m 3 /s) Aug. 26, gage height, 1.59 ft (0.485 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 24 77 27 13 12 12 162 79 66 19 14 15 2 26 72 26 12 12 12 285 71 56 17 14 16 3 2758 ' 65 26 12 12 12 465 64 47 17 12 14 4 62 25 12 12 12 556 61 41 16 12 12 5 81 58 24 12 12 12 503 73 34 14 11 21 6 98 53 24 12 12 12 453 71 33 33 9.7 23 7 101' 50 24 12 12 12 403 69 31 83 8.7 21 8 , gn 48 24 12 12 12 363 66 32 116 8.17'.1 18 9 90 42 23 12 12 12 331 64 31 141 18 10 91 38 23 12 12 12 318 60 29 140 6.4 31 11 90 38 22 12 12 12 300 62 26 123 5.7 31 12 82 36 20 12 12 14 338 63 25 103 5.3 39 13 86 35 20 12 12 24 403 67 21 88 4.9 52 14 161 34 21 12 12 20 563 79 19 75 4.9 45 15 247 34 20 12 12 18 947 98 20 64 4.9 43 16 258 34 19 12 12 19 1350 128 17 55 4.9 37 17 270 33 18 12 12 19 1260 137 21 48 7.5 36 18 362 32 17 12 12 18 946 181 19 43 7.8 36 19 386 31 17 12 12 18 699 240 17 37 7.3 34 20 349 28 16 12 12 20 524 232 17 31 7-6 32 21 287 25 16 12 12 20 397 189 17 32 6.3 29 22 239 24 15 12 12 20 308 150 16 34 7-5 27 23 201 24 15 12 12 20 249 116 15 31 7.4. 24 24 170 24 14 12 12 20 209 97 25 25 6.9 24 25 150 24 14 12 12 20 186 85 29 23 6.2 22 26 128 26 14 12 12 21 154 77 27 22 8.3 20 27 115 27 13 12 12 21 128 68 25 20 16 18 28 104 27 13 12 12 21 110 64 28 18 14 19 29 95 27 13 12 —— 23 97 70 31 18 12 20 30 87 27 13 12 —„_ 52 88 72 24 17 12 21 31 83 —— 13 12 —— 108 — - 74 ___ 15 12 —— TOTAL 4640 1155 589 373 336 648 13095 3027 839 1518 272.4 798 MEAN 150 38.5 19.0 12. Q 12.0 20.9 437 97-6 28.0 49-0 8.79 26.6 MAX 386 77 27 13 12 108 1350 240 66 141 16 52 MIN 24 24 13 12 12 12 88 60 15 14 4.9 12 CPSM 1.47 .38 .19 .12 .12 .21 4.28 .96 .28 .48 .09 .26 IN. 1.69 .42 .21 .14 .12 .24 4.78 1.10 .31 .55 .10 .29 AC-PT 9200 2290 1170 740 666 1290 25970 6000 1660 3010 540 1580 CAL YR 1981 TOTAL 23745-7 MEAN 65.1 MAX 511 MIN 5.3 CPSM .64 IN 8.66 AC-PT 47100 WTR YR 1982 TOTAL 27290.4 MEAN 74.8 MAX 1350 MIN 4.9 CPSM .73 IN 9.95 AC-PT 54130 225 ST. CROIX RIVER BASIN 05338500 SNAKE RIVER NEAR PINE CITY, MN LOCATION.—Lat 45°50'30", long 92°56'00", in SE4NW4 sec.26, T.39 N., R.21 W., Pine County, Hydrologic Unit 07030004, on left bank, at site of former powerplant and dam, 0.5 mi (0.8 km) downstream from Cross Lake, and 1.5 mi (2.4 km) northeast of Pine City. DRAINAGE AREA.—958 mi 2 (2,480 km 2 ). PERIOD OP RECORD.—Water years 1963, 1965, 1967-68, 1975 to current year. REMARKS.—Letter K indicates non-ideal colony count.

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 OXYGEN, COLI- STREP­ SPE­ DIS­ PORM, TOCOCCI HARD­ STREAM- CIFIC SOLVED PECAL, PECAL, HARD­ NESS, PLOW, CON­ PH OXYGEN, (PER­ 0.7 KP AGAR NESS. NONCAR- INSTAN­ DUCT­ (STAND­ TEMPER­ DIS­ CENT UM-MP (COLS. (MG/L BONATE TIME TANEOUS ANCE ARD ATURE SOLVED SATUR­ (COLS./ PER AS (MG/L DATE (CPS) (UMHOS) UNITS) (DEG C) (MG/L) ATION) 100 ML) 100 ML) CAC03) CAC03) (00061) (00095) (00400) (00010) (00300) (00301) (31625) (31673) (00900) (00902) APR 16.. 1130 2670 108 7.3 6.5 10.4 88 K20 280 46 6 AUG 25.. 1530 117 189 9.2 26.5 9-7 125 42 >5000 98 0

SOLIDS, MAGNE­ SODIUM POTAS­ ALKA­ CHLO­ PLUO- SILICA, RESIDUE CALCIUM SIUM, SODIUM, AD­ SIUM, LINITY SULPATE RIDE, RIDE, DIS­ AT 180 DIS­ DIS­ DIS- SORP­ DIS­ LAB DIS­ DIS­ DIS­ SOLVED DEG. C SOLVED SOLVED SOLVED TION SOLVED (MG/L SOLVED SOLVED SOLVED (MG/L DIS­ (MG/L (MG/L (MG/L RATIO (MG/L AS (MG/L (MG/L (MG/L AS SOLVED DATE AS CA) AS MG) AS NA) AS K) CAC03) AS S04) AS CL) AS P) SI02) (MG/L) (00915) (00925) (00930) (0093D (00935) (90410) (00945) (00940) (00950) (00955) (70300) APR 16.. 11 4.6 2.5 .2 2.2 40 5.0 2.4 <.l 8.0 82 AUG 25.. 25 8.7 3.7 .2 1.1 101 3.0 3.3 .3 6.9 154

SOLIDS, NITRO- SEDI­ SUM OP SOLIDS, NITRO- NITRO- NITRO- GEN ,AM- PHOS- MENT, CONSTI­ DIS- GEN, GEN, GEN, MONIA + PHOS- PHORUS, SEDI- DIS- TUENTS, SOLVED NITRATE NITRITE AMMONIA ORGANIC PHORUS, DIS- MENT, CHARGE, DIS- (TONS TOTAL TOTAL TOTAL TOTAL TOTAL SOLVED SUS- SUS- SOLVED PER (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L PENDED FENDED DATE (MG/L) DAY) AS N) AS N) AS N) AS N) AS P) AS P) (MG/L) (T/DAY) (70301) (70302) (00620) (00615) (00610) (00625) (00665) (00666) (80154) (80155) APR 16... 60 591 .21 .020 .110 .66 .060 — 6 43 AUG 25... 113 48.6 < .010 < .010 1.50 .110 .060 6 1.9

CHRO­ BARIUM, BORON , CADMIUM MIUM, COBALT, COPPER, IRON, TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL ARSENIC RECOV­ RECOV­ RECOV­ RECOV­ RECOV­ RECOV­ RECOV­ TOTAL ERABLE ERABLE ERABLE ERABLE ERABLE ERABLE ERABLE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS AS) AS BA) AS B) AS CD) AS CR) AS CO) AS CU) AS PE) (01002) (01007) (01022) (01027) (01034) (01037) (01042) (01045) AUG 25... 1530 100 80 10 490

MANGA- LEAD, NESE, MERCURY NICKEL, SILVER,SILVER, ZINC, TOTAL TOTAL TOTAL TOTAL TOTAL SELE­ TOTAL RECOV- RECOV- RECOV- RECOV­ RECOV­ NIUM, RECOV­ CYANIDE ERABLE ERABLE ERABLE ERABLE ERABLE TOTAL ERABLE TOTAL (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (MG/L DATE AS PB) AS MN) AS HG) AS NI) AS AG) AS SE) AS ZN) AS CN) (0105D (01055) (71900) (01067) (01077) (01147) (01092) (00720) AUG 25... 160 .1 <1 <1 40 226 ST. CROIX PIVRR BASIN 05340050 SUNRISE RIVER NEAR LINDSTROM, MM LOCATION.—Lat 45°27'00", lone; 92°53'10", in SW4NE4 sec.7, T.34 M., R.20 W., Chlsago County, Hydrologic Unit 07030005, on left bank 20 ft (6 m) downstream from highway bridge and 4.5 mi (7.2 km) northwest of Lindstrom. DRAINAGE AREA.—231 mi 2 (598 km 2 ). PERIOD OP RECORD.—July 1965 to current year. GAGE.—Water-stage recorder. Datum of gage is 846.10 ft (257.891 m) National Geodetic Vertical Datum of 1929. (Chisago County bench mark). REMARKS.—Records good except those for winter period, which are fair. Some regulation by Minnesota Game and Pish Wildlife Refuge ponds above the station. At high stages a small part of flow discharges into the Rum River and Coon Creek basins from West Arm of Coon Lake and South Coon Lake, respectively. AVERAGE DISCHARGE.—17 years, 95.1 ft3/s (2.693 m 3 /s), 5.59 in/yr (142 mra/yr); median of yearly mean discharges, 101 ft3/s (2.86 m3/s), 5.94 in/yr (151 mra/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 745 ftVs (21.1 m3/s) July 3, 1975, gage height, 7.65 ft (2.332 m); minimum, 1.9 ft3/s (0.054 m3/s) Sept. 19, 20, 21, 1976; minimum gage height, 1.98 ft (0.604 m) Oct. 3, 1971. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 448 ft 3/s (12.7 m 3/s) Apr. 6, gage height, 6.95 ft (2.118 m); minimum, 9.4 ft 3 /s (0.27 m3/s) Oct. 3, gage height, 2.47 ft (0.753 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 198! TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 13 49 64 50 43 49 263 211 132 11 37 50 2 11 52 64 19 43 44 277 200 118 13 36 48 3 11 55 64 19 43 47 327 188 105 11 44 44 4 15 57 62 18 43 46 419 182 97 39 50 42 5 14 59 61 18 43 45 421 203 90 37 65 47 6 18 60 60 18 43 45 439 199 86 39 50 50 7 22 61 59 18 43 46 434 195 83 37 37 19 8 28 62 58 17 43 46 425 181 76 35 36 19 9 30 61 56 17 13 46 410 179 70 33 82 48 10 35 64 55 16 13 45 389 180 67 39 70 53 11 41 63 52 16 42 44 371 188 62 45 29 53 12 43 63 52 16 42 39 360 188 60 45 26 51 13 41 67 51 16 42 41 349 225 57 23 25 19 14 48 97 51 15 42 40 338 213 56 22 25 46 15 41 94 99 45 42 40 328 251 56 16 25 54 16 36 87 98 15 42 41 317 253 53 15 26 56 17 40 81 91 15 42 42 315 257 52 15 38 55 18 47 106 84 15 42 44 309 276 50 15 16 53 19 43 103 79 11 43 46 297 276 50 20 20 51 20 39 93 73 44 43 50 290 270 52 33 18 48 21 34 85 66 44 13 51 296 258 50 33 18 46 22 32 78 60 44 13 55 293 252 49 43 22 45 23 30 73 59 44 13 61 290 218 17 43 23 44 24 30 69 58 44 11 72 286 210 52 48 27 27 25 31 68 57 44 11 86 278 233 51 44 29 27 26 32 68 54 44 11 96 265 221 17 44 30 30 27 37 67 19 43 11 98 253 206 50 42 39 32 28 39 65 53 43 15 97 244 191 52 38 36 33 29 42 64 56 13 117 235 177 50 44 37 34 30 45 63 51 43 _ _ 176 224 163 16 41 37 37 31 48 —— 50 43 —— 263 —— 116 —— 38 35 —— TOTAL 1016 2134 1916 1410 1202 2058 9742 6686 1966 1094 1088 1351 MEAN 32.8 71.1 62.8 45.5 12.9 66.4 325 216 65.5 35.3 35.1 45.0 MAX 48 106 99 50 45 263 139 276 132 48 82 56 MIN 11 19 49 13 12 39 221 116 16 15 16 27 CFSM .14 .31 .27 .20 .19 .29 1.11 .91 .28 .15 .15 .20 IN. .16 .31 .31 .23 .19 .33 1.57 1.08 .32 .18 .18 .22 CAL YR 1981 TOTAL 39063.6 MEAN 107 MAX 278 MIN 9.8 CFSM .16 IN 6.29 WTR YR 1982 TOTAL 31693.0 MEAN 86.8 MAX 439 MIN 11 CPSM .38 IN 5.10 22? ST. CROIX RIVER BASIN 053^0500 ST. CROIX RIVER AT ST. CROIX PALLS, WI (National stream-quality accounting network station) LOCATION.--Lat 45°24'25", long 92°38'49", in SWJNWJ sec.30, T.34 N. , R.18 W., Polk County, Hydrologic Unit 07030005, St. Croix National Scenic Riverway, on left bank, 1,500 ft (457 m) downstream from powerplant of Northern States Power Co., in St. Croix Palls, and at mile 52.2 (84.0 km). DRAINAGE AREA.— 6,240 mi 2 (16,160 km2 ), revised. WATER-DISCHARGE RECORDS PERIOD OP RECORD.—January 1902 to current year. Prior to January 1910, monthly discharge only, published in WSP 1308. Prior to October 1939, published as "near St. Croix Palls." REVISED RECORDS.—WSP 1115: 1929. GAGE.—Water-stage recorder and crest-stage gage. Datum of gage is 689-94 ft (210.294 m) National Geodetic Vertical Datum of 1929- Prior to July 1905, gage heights and discharge measurements were used by Loweth and Wolff, consulting engineers of St. Paul, Minn., to determine the flow. July 1905 to February 1940, records were computed from power generation at the St. Croix Palls Powerplant. February 1940 to Sept. 30, 1979, water-stage recorder at site 300 ft (91 m) downstream at same datum. REMARKS.—Records are good. Discharges for periods of no gage-height record, Jan. 8 to Feb. 1, Apr. 18-21, and June 15 to Aug. 18, furnished by Northern States Power Co. Diurnal fluctuation caused by St. Croix Falls Powerplant 1,500 ft (457 m) upstream. AVERAGE DISCHARGE. —80 years, 4,206 ftVs (119.1 mVs), 9.15 in/yr (232 mm/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 54,900 ft3/s (1,550 ra^/s) May 8, 1950, gage height, 25.19 ft (7.678 m); minimum daily, 75 ft3/s (2.12 mVs) July 17, 1910. EXTREMES FOR CURRENT YEAR.--Maximum discharge, 30,600 ft3/s (867 m3/ s ) Apr. 19, gage height, 14.34 ft (4.371 m); minimum daily, 1,410 ftVs (39-9 m^/s) Dec. 17. RATING TABLE (gage height, in feet, and discharge, in cubic feet per second). 2.5 1,400 6.0 10,700 3.0 2,350 9.0 18,200 4.0 4,950 12.0 25,400 15.0 32,100 DISCHARGE, IN CUBIC PEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 2740 4960 2940 2380 2460 2480 12100 8680 4450 2470 2960 2460 2 2940 5750 3070 2460 1910 2530 15700 8490 3470 2790 2630 2580 3 2930 4950 3220 2310 2370 2350 19000 7350 3150 2320 2740 2330 4 3510 4210 2850 2240 2320 2400 18600 7140 3350 2270 2560 2480 5 5420 4280 2470 2460 2290 2640 18800 7150 3250 2370 2770 2310 6 4560 4260 2340 2270 2270 2270 18600 6590 2950 2500 2730 2290 7 4700 4210 2920 2930 2080 2220 17600 8910 3410 2920 2350 3340 8 6200 3860 3060 2660 2560 2150 16800 9780 2650 5520 2270 3080 9 5610 3890 2880 1650 2240 2250 15900 9700 3070 6970 2330 2940 10 5440 4240 2090 2210 2550 2240 14900 9580 2730 8120 2210 3740 11 5210 3780 2280 2440 2310 2130 13400 10900 3630 8270 1990 3090 12 4980 3450 2140 1910 2330 2410 11800 12200 2840 7990 1940 3380 13 5190 3520 2340 2440 2410 2450 12400 14000 2780 6920 1970 4160 14 5440 3610 2490 2010 2190 2480 13300 15500 3030 6560 1890 4480 15 7030 3540 2040 2310 2150 2680 15800 15800 2950 5840 1930 4460 16 8600 3470 2000 I960 2380 2780 19000 16400 2510 4890 2000 4860 17 9290 3420 1410 2090 2320 2700 22100 16000 3010 4330 1900 5350 18 10000 3390 1950 2340 2300 2590 26600 15800 2750 4540 1970 4400 19 11200 3290 1800 1810 2300 2930 29400 15300 2420 4380 1750 4960 20 12200 3350 2050 2210 2400 3080 28600 14400 2470 4670 2210 4630 21 11700 3160 2340 2180 2180 2700 26000 14000 2810 4830 2400 4350 22 10900 2850 2340 2190 2220 2760 20900 13000 2950 3870 2380 3990 23 9700 2570 2490 1890 2520 3000 19900 11700 2440 3670 2380 3780 24 9020 3400 2230 1840 2400 2960 18000 10700 2780 3340 2250 3950 25 8400 3120 2430 2330 2540 3450 15700 9870 3140 3280 1870 3180 26 7800 3120 2080 1970 2500 3130 13500 8980 2600 3510 2120 3040 27 7390 2800 2250 2230 2510 3390 12000 8480 2670 2800 2470 2990 28 6430 3310 2330 2100 2360 3490 12400 7520 2730 2930 2800 3170 29 6380 3030 2300 2200 —— 3660 9310 7360 2800 2760 2840 3150 30 5980 2940 2210 2160 —— 5690 7770 6800 2690 3120 2400 3440 31 4320 —— 2370 2040 —— 8310 —— 6200 —— 2140 2460 —— TOTAL 211210 109730 73710 68220 65370 92300 515880 334280 88480 132890 71470 106360 MEAN 6813 3658 2378 2201 2335 2977 17200 10780 2949 4287 2305 3545 MAX 12200 5750 3220 2930 2560 8310 29400 16400 4450 8270 2960 5350 MIN 2740 2570 1410 1650 1910 2130 7770 6200 2420 2140 1750 2290 CPSM 1.09 • 59 .38 .35 .37 .48 2.76 1.73 .47 .69 .37 .57 IN. 1.26 .65 .44 .41 .39 .55 3.08 1.99 .53 .79 .43 .63 CAL YR 1981 TOTAL 1699750 MEAN 4657 MAX 22500 MIN 1170 CFSM .75 IN 10.13 WTR YR 1982 TOTAL 1869900 MEAN 5123 MAX 29400 MIN 1410 CPSM .82 IN 11.15 228 ST. CROIX RIVER BASIN 053*10500 ST. CROIX RIVER AT ST. CROIX PALLS, WI—Continued (National stream-quality accounting network station) WATER-QUALITY RECORDS PERIOD OP RECORD.—Water years 1967-68, 197** to current year. PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE: March 1975 to September 1981 (discontinued). WATER TEMPERATURES: March 1975 to September 1981 (discontinued). REMARKS.—Letter K indicates non-ideal colony count.

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPE­ OXYGEN, COLI- STREP­ SPE­ CIFIC DIS­ FORM, TOCOCCI STREAM- CIFIC CON­ PH SOLVED FECAL, FECAL, PLOW, CON­ DUCT­ PH LAB TUR­ OXYGEN, (PER­ 0.7 KF AGAR INSTAN­ DUCT­ ANCE (STAND­ (STAND­ TEMPER­ BID­ DIS­ CENT UM-MP (COLS. TIME TANEOUS ANCE LAB ARD ARD ATURE ITY SOLVED SATUR­ (COLS./ PER DATE (CPS) (UMHOS) (UMHOS) UNITS) UNITS) (DEG C) (NTU) (MG/L) ATION) 100 ML) 100 ML) (00061) (00095) (90095) (00400) (00403) (00010) (00076) (00300) (00301) (31625) (31673) OCT 13... 1140 5630 145 143 7.1 7.8 11.0 2.5 10.0 95 35 100 DEC 07... 1305 3140 194 173 7.5 7-9 .5 2.2 13.5 97 K2 20 PEB 01... 1130 4980 210 201 7.2 7.8 .0 2.9 — — K10 K1600 APR 06... 1250 18100 128 108 7.5 7.6 .0 4.8 12.4 88 140 K600 JUN 01... 1250 6280 130 136 7.9 7.7 20.0 2.7 8.2 94 K8 160 AUG 18... 0920 1760 165 172 8.1 8.0 23.0 2.6 8.3 101 32 93

HARD­ NESS MAGNE­ SODIUM POTAS­ ALKA­ CHLO­ FLUO- SILICA, HARD­ NONCAR- CALCIUM SIUM, SODIUM, AD­ SIUM, LINITY SULFATE RIDE, RIDE, DIS­ NESS BONATE DIS­ DIS­ DIS­ SORP­ DIS­ LAB DIS­ DIS­ DIS­ SOLVED (MG/L (MG/L SOLVED SOLVED SOLVED TION SOLVED (MG/L SOLVED SOLVED SOLVED (MG/L AS AS (MG/L (MG/L (MG/L RATIO (MG/L AS (MG/L (MG/L (MG/L AS DATE CAC03) CAC03) AS CA) AS MG) AS NA) AS K) CAC03) AS S04) AS 'CL) AS F) SI02) (00900) (95902) (00915) (00925) (00930) (0093D (00935) (90410) (00945) (00940) (00950) (00955) OCT 13... — — — — — — — 64 3.4 3.4 <.l — DEC 07... 87 4.0 23 7.2 3.3 .2 .9 83 5.4 3.3 <.l 12 PEB 01. .. 92 .00 24 7.7 3.3 .2 l.l 93 6.5 3.9 .1 15 APR 06... 50 4.0 13 4.3 2.2 .1 2.3 46 5.4 2.5 <.l 9.2 JUN 01... 65 1.0 17 5.4 2.5 .1 .8 64 5.0 2.4 <.l 7.4 AUG 18... 84 2.0 22 7.0 3.1 .2 <.l 82 4.0 2.6 .1 11

SOLIDS, SOLIDS, NITRO­ NITRO­ NITRO­ PHOS­ SEDI­ SED. RESIDUE SUM OP SOLIDS, GEN, GEN, GEN, AM­ PHOS­ PHORUS , MENT, SUSP. AT 180 CONSTI­ DIS­ N02+N03 AMMONIA MONIA + PHOS­ PHORUS, ORTHO , SEDI­ DIS­ SIEVE DEG. C TUENTS, SOLVED DIS­ DIS­ ORGANIC PHORUS, DIS­ DIS­ MENT, CHARGE, DIAM. DIS­ DIS­ (TONS SOLVED SOLVED TOTAL TOTAL SOLVED SOLVED SUS­ SUS­ 35 FINER SOLVED SOLVED PER (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L PENDED PENDED THAN DATE (MG/L) (MG/L) DAY) AS N) AS N) AS N) AS P) AS P) AS P) (MG/L) (T/DAY) .062 MM (70300) (70301) (70302) (0063D (00608) (00625) (00665) (00666) (0067D (80154) (80155) (7033D OCT 13... 99 — 1500 .19 .060 .60 .030 .020 <.010 5 76 74 DEC 07... 121 105 1030 .27 .060 .13 .030 <.010 .020 3 25 90 PEB 01... 127 118 1710 .44 .120 .52 .160 .030 .030 20 269 88 APR 06... 79 67 3860 .44 .220 .99 .080 .030 .030 11 538 92 JUN 01... lot 79 1760 .14 .020 .90 .040 .020 .030 17 288 54 AUG 18... 129 99 613 <.10 .010 .50 .030 <.010 <.010 3 14 95 ST. CROIX RIVER BASIN 229 05340500 ST. CROIX RIVER AT ST. CROIX PALLS, WI—Continued WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 CHRO­ BARIUM, CADMIUM MIUM, CHRO­ COBALT, ARSENIC TOTAL BARIUM, TOTAL CADMIUM TOTAL MIUM, TOTAL ARSENIC DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ TOTAL SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS AS) AS AS) AS BA) AS BA) AS CD) AS CD) AS CR) AS CR) AS CO) (01002) (01000) (01007) (01005) (01027) (01025) (01034) (01030) (01037) PEB 01. .. 1130 1 1 <100 23 1 <1 10 10 <1 APR 06... 1250 1 1 100 25 <1 <1 20 10 1 AUQ 18... 0920 1 1 100 19 <1 <1 10 10 <1

MANG A- COPPER, IRON, LEAD, NESE, MANGA­ MERCURY COBALT, TOTAL COPPER, TOTAL IRON, TOTAL LEAD, TOTAL NESE, TOTAL DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS CO) AS CU) AS CU) AS PE) AS PE) AS PB) AS PB) A3 UN) AS MN) AS HG) (01035) (01042) (01040) (01045) (01046) (01051) (01049) (01055) (01056) (71900) PEB 01... <1 10 10 610 280 <1 <1 40 34 .1 APR 06... <1 10 1 1200 470 13 9 110 48 .1 AUG 18... <1 6 2 410 83 2 1 70 14 .1

NICKEL, SELE­ SILVER, ZINC, MERCURY TOTAL NICKEL, SELE­ NIUM, TOTAL SILVER, TOTAL ZINC, DIS­ RECOV­ DIS­ NIUM, DIS­ RECOV­ DIS­ RECOV­ DIS­ SOLVED ERABLE SOLVED TOTAL SOLVED ERABLE SOLVED ERABLE SOLVED (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS HG) AS NI) AS NI) AS SE) AS SE) AS AG) AS AG) AS ZN) AS ZN) (71890) (01067) (01065) (01147) (01145) (01077) (01075) (01092) (01090) PEB 01. .. .1 <1 <1 <1 <1 <1 <1 50 14 APR 06... .1 14 <1 <1 <1 <1 <1 <10 <3 AUG 18... <.l 5 2 <1 <1 <1 <1 30 <3 230 ST. CROIX RIVER BASIN

450909092471801 SQUARE LAKE OUTLET NEAR STILLWATER, MN LOCATION.—Lat 45°09'09", long 92°47'48", in SE4SE4 sec.23, T.31 N., R.20 W. , Washington County, Hydrologic Unit 07030005, at culvert on southeast side of lake, in county park, 3.5 mi (5.6 km) southwest of Marine on St. Croix. DRAINAGE AREA. — 1.21 mi 2 (3.13 km 2 ). PERIOD OP RECORD.--October 1981 to December 1982. TASE.—Water-stage recorder. REMARKS.—Records good except those for period of no gage-height record, Oct. 1 to Mar. 18, which are poor. EXTREMES FOR CURRENT PERIOD.—Water year 1982: Maximum discharge, 4.2 ftVs (0.12 m 3 /s) May 18, gage height, 1.55 ft (0.472 :n); minimum, 0.32 ftVs (0.009 mVs) Aug. 12, gage height, 1.22 ft (0.372 m). October to December 1982: Maximum discharge during period, 13 ftVs (0.37 mVs) Nov. 12, gage height, 1.80 ft (0.549 m); minimum, 1.3 ft 3 /s (0.04 m 3 /s) Oct. 1, gage height, 1.37 ft (0.418 m).

DISCHARGE, IN CUBIC PEST PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY DOT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP

1 2.6 1.8 1.6 1.8 2.0 2.1 1.9 1.5 1.4 1.0 .87 1.3 2 2.5 1.7 1.6 1.8 2.0 2.1 1.9 1.4 1.2 1.0 .82 1.2 3 2.5 1.7 1.7 1.8 2.0 2.1 2.4 1.4 1.1 1.0 .81 .99 4 2.4 1.7 1.7 1.8 2.0 2.1 2.3 1.5 1.1 1.0 .81 • 92 5 2.4 1.7 1.7 1.8 2.0 2.1 2.2 2.3 1.1 .96 .81 1.1

6 2.3 1.7 1.7 1.8 2.0 2.1 2.1 2.2 1.0 1.1 .81 1.0 7 2.3 1.7 1.7 1.8 2.0 2.1 2.0 2.2 .97 1.1 .81 .96 8 2.2 1.7 1.7 1.8 2.0 2.1 2.0 2.0 .93 • 93 .75 .89 9 2.2 1.7 1.7 1.8 2.0 2.1 2.0 2.2 .94 .92 .53 1.1 10 2.2 1.7 1.7 1.9 2.0 2.1 1.9 2.3 .82 .96 .44 3.3

11 2.2 1.7 1.7 1.9 2.0 2.1 1.9 2.2 .75 .91 .41 3.3 12 2.1 1.7 1.7 1.9 2.0 2.1 2.0 2.4 .75 .87 .38 3.1 13 2.1 1.7 1.7 1.9 2.0 2.1 2.0 3.2 .69 .86 .36 2.9 14 2.1 1.7 1.7 1.9 2.0 2.1 2.0 3.2 .73 .86 .39 2.4 15 2.0 1.6 1.7 1.9 2.0 2.1 2.3 3.1 .81 .99 .41 2.5

16 2.0 1.6 1.7 1.9 2.0 2.1 2.6 3.0 .76 1.1 .45 2.2 17 2.0 1.6 1.7 1.9 2.0 2.1 2.9 3.2 .80 1.1 .53 2.0 18 2.0 1.6 1.7 1.9 2.0 1.8 2.4 3.4 .77 .93 .55 1.9 19 1.9 1.6 1.7 1.9 2.0 1.6 2.4 3.1 .77 .83 .55 1.7 20 1.9 1.6 1.7 1.9 2.0 2.1 3.0 2.6 .99 .78 .52 1.6 21 1.9 1.6 1.7 1.9 2.0 2.1 2.7 2.2 .94 .75 .45 1.5 22 1.9 1.6 1.8 1.9 2.0 1.9 2.4 2.0 .94 .75 .47 1.4 23 1.9 1.6 1.8 1.9 2.0 1.8 2.3 1.8 .^4 .74 .44 1.4 24 1.9 1.6 1.8 1.9 2.0 1.8 2.1 1.7 1 .2 .73 .62 1.4 25 1.8 1.6 1.8 1.9 2.1 1.7 2.0 1.6 1.2 .80 .71 1.3 26 1.8 1.6 1.8 1.9 2.1 1.6 1.9 1.6 1.1 1.1 .73 1.3 27 1.3 1.6 1.8 1.9 2.1 1.5 1.7 1.7 1.1 1.1 .89 1.3 28 1.8 1.6 1.8 1.9 2.1 1.4 1.6 1.7 1.1 1.0 .78 1.2 29 1.8 1.6 1.8 1.9 —— 1.5 1.6 1.7 1.2 1.1 .94 1.3 30 1.8 1.6 1.8 1.9 1.8 1.5 1.7 1.1 .93 1.0 1.4 31 1.8 — - 1.8 1.9 —— 2.0 —— 1.7 —— .86 .93 —— TOTAL 64.1 49.5 53.5 58.0 56.4 60.3 64.0 67.8 29.20 29.06 19.97 49.86 MEAN 2.07 1.65 1.73 1.87 2.01 1.95 2.13 2.19 .97 .94 .64 1.66 MAX 2.6 1.8 1.8 1.9 2.1 2.1 3.0 3.4 1.4 1.1 1.0 3.3 MIW 1.8 1.6 1.6 1.8 2.0 1.4 1.5 1.4 .69 .73 .36 .89 AC -FT 127 98 106 115 112 120 127 134 58 58 40 99 WTR YR 1982 TOTAL 601.69 MEAN 1.65 MAX 3.4 MIN .36 AC-PT 1190 ST. CKOIX RI'/PR BASIN

45090992474801 SQUARE LAKE OUTLET MEAR STILLW/VTER, MN—Continued

DISCHARGE, IN CUBIC FEET PER SECOND, rf/iTER YEAR OCTOBER 1982 TO SEPTEMBER 1983

DAY OCT NOV DEC JAN FES MAR APR MAY JUN JUL AUG SEP 1 1.4 3.5 6.6 2 1.6 3.5 7.0 3 1.7 3.6 7.1 4 1.7 3.4 6.8 5 1.7 3.1 6.4 6 2.6 3.2 5.9 7 4.2 3-2 5.3 8 3.7 3.2 5.2 9 3.4 3.2 4.8 10 3.7 4.3 4.2 11 3.6 4.6 3.4 12 3.6 6.8 2.6 13 3-3 5.6 2.2 14 3.2 5.8 1.9 15 3.1 5.7 1.8 16 2.9 5.5 1.7 17 2.8 5.6 1.6 18 2.6 5.7 1.6 19 3-3 6.5 1.7 20 5.8 7.6 1.7 21 4.8 7.6 1.8 22 4.5 7.7 1.9 23 4.2 7.8 2.0 24 4.0 7.0 2.1 25 3.8 7.6 2.2 26 3-7 7-3 2.3 27 3.6 7.0 2.4 28 3.5 6.8 2.5 29 3.7 6.6 2.7 30 3.6 6.6 2.8 31 3.4 —— 3.0 TOTAL 102.7 165.6 105.2 MEAN 3.31 5.52 3.39 MAX 5.8 7.8 7.1 MIN 1.4 3.1 1.6 AC -FT 204 328 209 CAL YR 1982 TOTAL 808.09 MEAN 2.21 MAX 7.8 Mill .36 AC-PT 1600 J ST. CROIX RIVER BASIN 445840092560001 EAGLE POINT LAKE INLET NEAR OAKDALE, MN LOCATION.—Lat 44°58'40", long 92°56'00", in NJ sec.23, T.29 N., R.22 W., Washington County, Hydrologic Unit 07010206, at culvert on County Road 138 (Inwood Avenue North), 1 mi (1.6 km) south of Stillwater Boulevard, near Oaicdale. DRAINAGE AREA.—0.65 mi 2 (1.70 km 2 ). PERIOD OP RECORD.--March to October 1982. GAGE.—Water-stage recorder. REMARKS.—Records good except those for period of no gage-height record, Mar.29-31, which are poor. EXTREMES FOR CURRENT PERIOD.--March to September 1982: Maximum discharge daring period, 54 ft 3 /s (1.53 m 3/s) May 16, gage height, 1.83 ft (0.558 mj; no flow on many days. October 1982: Maximum discharge during period, 1.0 ft^/s (0.028 m^/s) Oct. 7, gage height, 1.04 ft (0.317 m); no flow Oct. 1,2.

DISCHARGE, IN CUBIC PEST PER SECOND, WATER YEAR OCTOBER 1981 T5 SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN PErf 1AR APR MAY ,T(M JUi, AUT SEP

1 —— 2.3 .60 .06 .00 .00 .00 o 2.0 .55 .06 .00 .00 .00 3 —— 2.0 .55 .06 .00 .00 .00 '4 1.3 1.4 .05 .00 .00 .00 5 —— .69 1.7 .05 .00 .00 .00

6 _ _ .41 .87 .05 .00 .00 .00 7 .24 .75 .05 .00 .00 .00 8 .28 1.2 .05 .00 .00 .00 9 —— .36 4.8 .05 .00 .00 .00 10 ___ .38 .80 .04 .00 .00 .00 11 ___ .41 .44 .03 .00 .00 .00 12 —— .48 1.4 .00 .00 .00 .00 13 .51 1.8 .00 .00 .00 .00 14 —— .42 .92 .00 .00 .00 .00 15 — .52 .62 .04 .00 .00 .00 16 ____ 1.2 4.1 .00 .00 .00 .00 17 —— 1.7 3.3 .00 .00 .00 .00 18 —— .93 1.5 .00 .00 .00 .00 19 —— .87 .36 .00 .00 .00 .00 20 —— 1.6 .19 .00 .00 .00 .00

21 _ __ 1.2 .14 .05 .00 .00 .00 22 —— 1.0 .13 .00 .00 .00 .00 23 — _ .87 .11 .00 .00 .00 .00 24 —— .69 .10 .00 .00 .00 .00 25 — .69 .09 .03 .00 .00 .00

26 _ _ .69 .10 .00 .00 .00 .00 27 —— .60 .15 —— .00 .00 .00 28 _ _ .60 .10 .00 .00 .00 29 2.0 .64 .08 —— .00 .00 .00 30 6.5 .60 .07 —— .00 .00 .00 .31 3.2 —— .08 —— .00 .65 —

TOTAL _ _ 26.18 29.00 .00 .65 .00 MEAN .87 .94 .000 .021 .000 MAX ___ 2.3 4.8 .00 .65 .00 MIN —— .24 .07 —— .00 .00 .00 AC-PT —— 52 58 —— .00 1.3 .00 ST. CROIX RIVER BASIN 233 445840092560001 EAGLE POINT LAKE INLET NEAR OAKDALE, MN—Continued DISCHARGE, IN CUBIC PEET PER SECOND, WATER YEAR OCTOBER 1982 TO SEPTEMBER 1983 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUM JUL AUG SEP 1 .00 2 .00 3 .05 4 .04 5 .03 6 .03 7 .07 8 9 10 11 —— 12 —— 13 14 15 16 17 18 19 20 —— 21 —— 22 23 24 25 26 27 28 29 30 31 TOTAL —— MEAN —— MAX —— MIN AC-PT —— 234 ST. CROIX RIVER BASIN 114581(1092540901 LAKE ELMO INLET PROM EAGLE POINT LAKE NEAR OAKDALE, MN LOCATION.—Lat 44°58'4r', long 92°54'09", in SW4SW4 sec.23, T. 29 N., R.22 W. , Washington County, Hydrologic Unit 07010206, at culvert on Keats Avenue, 1.3 mi (2.1 km) south of State Highway 212 near Oakdale. DRAINAGE AREA.--6.13 mi 2 (15.87 km 2 ). PERIOD OP RECORD.—March to September 1982. GAGE.—Water-stage recorder. REMARKS.—Records good except those for period of no gage-height record, Mar. 29-Apr. 7, which are poor. EXTREMES FOR CURRENT PERIOD.—March to September 1982: Maximum discharge during period, 12 ftVs (0.34 m 3 /s) Apr. 1, gage height, 7-84 ft (2.390 m); no flow on many days.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 12 .79 .00 .00 .00 .00 2 11 .85 .00 .00 .00 .00 3 9.4 .78 .00 .00 .00 .00 4 8.4 .87 .00 .00 .00 .00 5 7.8 1.0 .00 .00 .00 .00

6 7.2 1.0 .00 .00 .00 .00 7 6.4 .98 .00 .00 .00 .00 8 5.7 .94 .00 .00 .00 .00 9 5.1 1.1 .00 .00 .00 .00 10 4.5 1.3 .00 .00 .00 .00

11 4.0 1.3 .00 .00 .00 .00 12 3.6 1.2 .00 .00 .00 .00 13 3.4 1.5 .00 .00 .00 .00 14 3.0 1.4 .00 .00 .00 .00 15 2.7 .16 .00 .00 .00 .00

16 2.5 .18 .00 .00 .00 .00 17 2.5 .20 .00 .00 .00 .00 18 2.3 .80 .00 .00 .00 .00 19 2.1 2.7 .00 .00 .00 .00 20 2.2 2.5 .00 .00 .00 .00

21 2.2 2.1 .00 .00 .00 .00 22 2.0 1.9 .00 .00 .00 .00 23 1.8 1.7 .00 .00 .00 .00 24 1.7 1.6 .00 .00 .00 .00 25 1.6 1.3 .00 .00 .00 .00

26 1.5 .10 .00 .00 .00 .00 27 1.4 .07 .00 .00 .00 .00 28 1.0 .03 .00 .00 .00 .00 29 .71 .22 .02 .00 .00 .00 .00 30 5.0 .07 .00 .00 .00 .00 .00 31 11 ___ .00 —— .00 .00 ——

TOTAL 119-29 30.37 .00 .00 .00 .00 MEAN 3.98 .98 .000 .000 .000 .000 MAX 12 2.7 .00 .00 .00 .00 MIN .07 .00 .00 .00 .00 .00 AC-FT 237 60 .0(|) .00 .00 .00 ST. GROIX RIVER BASIN 23 445835092530001 LAKE ELMO OUTLET ON COUNTY ROAD 17 NEAR OAKDALE, MN LOCATION.—Lat 44°58'35" 3 long 92°53'00", In NEJNEJ sec.26, T.29 N., R.22 W., Washington County, Hydrologic Unit 07010206, at culvert on southeast side of Lake Elmo on Lake Elmo Avenue, near Oakdale. DRAINAGE AREA. —7.54 ml 2 (19.53 km 2 ). PERIOD OF RECORD.—October 1981 to December 1982. GAGE.—Water-stage recorder. REMARKS.—Records good except those for period of no gage-height record, Oct. 1, 1981, to Mar. 18, 1982, and Nov. 18 to Dec. 31, 1982, which are fair. EXTREMES FOR CURRENT PERIOD.—Water year 1982: Maximam discharge, 8.4 ftVs (0.24 m 3 /s) May 6, gage height, 2.25 ft (0.686 ra); minimum, 0.02 ft 3 /s (0.001 m3 /s) Aug. 23-24, gage height, 1.26 ft (0.384 m). October to December 1982: Maximum discharge during period, 4.6 ft-Vs (0.13 m-Vs) Nov. 12, gage height, 1.87 ft (0.570 m); minimum, 0.02 ft 3 /s (0.001 nH/s) Oct 20, gage height, 1.24 ft (0.378 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN MAR APR MAY JUN JUL SEP 1 .29 .14 .14 .35 .94 1.3 5.2 5.2 2.0 .62 .24 ,88 2 .29 .14 .15 .36 .97 1.3 5.6 5.9 1.7 .56 .22 .86 3 .28 .14 .15 .37 1.0 1.4 6.3 6.3 1.5 .56 .33 .81 4 .27 .13 .15 .38 1.0 1.4 6.6 6.6 1.3 .54 .38 • 73 5 .26 .13 .16 .39 1.1 1.4 6.8 7.6 1.2 .48 .38 .84 6 .26 .13 .16 .40 1.1 1-5 6.9 7-5 1.1 .55 .37 .91 7 .25 .13 .17 .42 1.2 1.5 6.9 7.5 1.0 .55 .35 .80 8 .24 .13 .17 .43 1.2 1.6 7.0 7.3 .98 .50 .28 .78 9 .24 .13 .18 .44 1.2 1.6 6.9 7.4 .93 .47 .22 .80 10 .23 .12 .18 .45 1.2 1.6 6.7 7.1 .84 .48 .19 1.1 11 .23 .12 .19 .47 1.2 1.7 6.5 6.9 .77 .43 .16 1.1 12 .22 .12 .19 .49 1.1 1.7 6.3 6.8 .72 .42 .14 1.2 13 .21 .12 .20 .50 1.1 1.8 6.2 7.0 .66 .41 .15 1.3 14 .21 .12 .20 .52 1.1 1.8 5.9 6.9 .66 .40 .15 1.2 15 .20 .12 .21 .54 1.1 1.9 5.9 6.8 .68 .41 .15 1.2 16 .20 .11 .21 .55 1.1 1-9 6.1 6.6 .65 .45 .15 1.1 17 .19 .11 .22 .57 1.1 2.0 5.3 6.6 .65 .45 .15 1.1 18 .19 .11 .23 .59 1.1 1.7 2.5 6.5 .67 .42 .14 1.1 19 .18 .11 .23 .61 1.1 1.8 1.1 6.3 .66 .36 .15 .98 20 .18 .11 .24 .63 1.1 2.1 .63 6.0 .73 .34 .14 .87 21 .18 .11 .25 .65 1.1 2.1 .22 5.7 .71 .33 .12 .83 22 .17 .11 .25 .67 1.1 2.0 .06 5.5 .69 .32 .11 .45 23 .17 .12 .26 .70 1.1 2.0 .11 5.2 .67 .29 .11 .24 24 .17 .12 .27 .72 1.2 2.3 .20 5.1 .73 .27 .15 .25 25 .16 .12 .28 .74 1.2 2.5 .34 4.9 .74 .30 .19 .24 26 .16 .13 .29 .77 1.2 2.2 .57 4.8 .69 .37 .20 .22 27 .16 .13 .30 .79 1.2 2.0 .83 4.8 .67 .36 .27 .22 28 .15 .13 .31 .82 1.3 2.0 1.2 4.6 .66 .32 .24 .21 29 .15 .14 .32 .85 —— 2.3 .83 4.5 .72 .30 .41 .22 30 .15 .14 .33 .88 —— 3.9 4.4 3.8 .67 .27 .51 .26 31 .14 —— .34 .91 —— 4.8 —— 3-1 —— .25 .52 —— TOTAL 6.38 3.72 6.93 17.96 31.41 61.1 120.09 186.8 26.35 12.78 7.27 22.80 MEAN .21 .12 .22 .58 1.12 1.97 4.00 6.03 .88 .41 .23 .76 MAX .29 .14 .34 .91 1.3 4.8 7.0 7.6 2.0 .62 .52 1.3 MIN .14 .11 .14 .35 .94 1.3 .06 3-1 .65 .25 .11 .21 AC-PC 13 7.4 14 36 62 121 238 371 52 25 14 45 WTR YR 1982 TOTAL 503-59 MEAN 1.38 MAX 7.6 MIN .06 AC-FP 999 236 ST. CrtOIX RIVER BASIN 445835092530001 LAKE ELMO OUTLET ON COUNTY ROAD 17 NEAR OAKDALE, MM—Continued DISCHARGE, IN CUBIC FEET PER SECOND, WATEK YEAR OCTOBER 1982 TO SEPTEMBER 1983 MEAN VALUES DAY OCT NOV JAN FEB MAR APR JUN JUL AUG SEP 1 .25 .99 1.8 2 .29 .94 1.8 3 .30 1.0 1.7 4 .30 .92 1.6 5 .30 .83 1.6 6 .41 .76 1.5 7 .47 .72 1.5 8 .48 .69 1.4 9 .52 • 71 1.4 10 .55 1.4 1.3 11 .56 1.9 1.3 12 .56 4.5 1.3 13 .57 4.4 1.2 14 .55 4.5 1.2 15 .45 4.5 1.2 16 .09 4.5 1.2 17 .09 3.4 1.1 18 .09 2.0 1.1 19 .09 2.0 1.1 20 .03 2.0 1.2 21 .02 2.0 1.2 22 .02 2.0 1.2 23 .03 2.0 1.3 24 .03 2.0 1.4 25 .04 2.0 1.6 26 1.3 2.0 1.7 27 .94 1.9 1.8 28 .99 1.9 2.0 29 1.0 1.9 2.2 30 1.0 1.8 2.4 31 .94 —— 2.6 TOTAL 13.26 62.16 46.9 MEAN .43 2.07 1.51 MAX 1.3 4.5 2.6 MIN .02 .69 1.1 AC- FT 26 123 93 CAL YR 1982 TOTAL 608.88 MEAN MAX 7.6 MIN .02 AC-PT 1210 237 ST. CROIX RIVER BASIN 05341770 ST. CROIX RIVER AT AFTON, MN LOCATION.—Lat 44°54'00", long 92°46'45", In SWJNW4 sec.23, T.28 N., R.20 W., Washington County, Hydrologic Unit 07030005. Sampling site Is In the city of Afton 11.5 ml (8.5 km) upstream from mouth. PERIOD OP RECORD.—December- 1976 to September 1982 (discontinued). PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE: December- 1976 to current year. pH: December 1976 to current year. WATER TEMPERATURES: December- 1976 to cur-rent year-. DISSOLVED OXYGEN: December 1976 to current year. INSTRUMENTATION.—Water-quality monitor since December 1976. REMARKS.--Water Is pumped to a monitor that Is Inside a heated shelter; water temperature during the winter period may be affected. Extremes are for those years with 80 per-cent or more record. COOPERATION.--Water-quality monitor Is operated by the Metropolitan Waste Control Commission. EXTREMES FOR PERIOD OF DAILY RECORD.— SPECIFIC CONDUCTANCE (water years 1978, 1980): Maximum, 221 mlcromhos Aug. 14, 15, 18, 1980; minimum, 6l micromhos Apr. 18, 19, 1978. pH (water years 1978, 1980): Maximum, 9.1 units May 2, 3, 1980; minimum, 7.1 units Apr. 29, 1978. WATER TEMPERATURES (water years 1978, 1980): Maximum, 28.0°C June 29, 1978; minimum, 0.5°C many days during winter periods. DISSOLVED OXYGEN (water years 1978, 1980): Maximum, 16.8 mg/L May 1, 1980; minimum, 2.1 mg/L June 11, Sept. 17, 1978.

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C) : WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 __ _ _ _ „_ 191 188 190 171 171 171 231 230 230 2 189 177 180 190 188 189 171 171 171 231 230 230 3 179 177 178 186 182 184 171 170 171 231 230 230 4 179 178 178 181 177 179 171 170 171 231 230 230 5 179 179 179 175 173 174 171 170 170 231 230 230 6 179 177 178 169 169 169 170 167 168 231 230 230 7 181 177 178 173 169 170 168 167 167 231 230 230 8 180 177 177 172 169 170 167 167 167 230 230 230 9 —— —— 170 169 169 167 167 167 231 230 230 10 —— —— —— 169 168 169 168 167 167 230 230 230 11 _„_ __ __ 169 168 169 167 167 167 231 230 230 12 —— —— —— 169 169 169 170 170 170 231 230 230 13 —— _ _ 170 169 169 172 172 172 231 230 230 14 —— —— 170 167 169 174 174 174 231 230 230 15 182 177 178 171 168 170 176 176 176 230 230 230 16 179 176 177 171 169 170 178 178 178 230 230 230 17 181 177 178 168 167 167 180 180 180 230 230 230 18 187 176 177 168 167 167 179 172 176 230 230 230 19 179 177 177 169 167 167 185 185 185 230 230 230 20 —— —— 168 167 168 190 190 190 231 230 230 21 ______169 167 167 194 194 194 230 230 230 22 —— —— —— 169 168 169 200 199 199 263 230 245 23 —— —— —— 171 169 170 203 203 203 263 262 263 24 —— —— —— 171 170 171 208 207 207 264 263 263 25 —— —— —— 171 171 171 213 212 212 264 263 263 26 _ „_ __ __ 171 171 171 216 216 216 264 230 243 27 —— —— —— 171 171 171 221 220 220 230 230 230 28 —— — _ —— 171 171 171 225 225 225 230 230 230 29 —— —— __ 171 171 171 229 229 229 230 230 230 30 193 189 190 171 171 171 230 229 230 230 230 230 31 193 191 192 231 230 230 230 230 230 MONTH 191 167 172 231 167 188 264 230 234 238 ST. CROIX RIVER BASIN 05341770 ST. CROIX RIVER AT AFTON, MN—Continued SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 DAY MAX WIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 230 230 230 222 221 221 249 249 249 2 230 230 230 222 221 221 249 249 249 3 230 230 230 222 221 221 4 230 230 230 222 221 221 5 230 230 230 222 221 221 6 230 230 230 222 221 221 7 230 230 230 222 221 221 8 230 226 228 222 221 221 9 266 230 243 222 221 221 10 267 230 245 222 221 221 11 267 230 243 222 221 221 12 267 230 264 222 221 221 13 266 264 265 226 226 226 14 267 230 261 231 231 231 15 264 230 262 236 235 235 16 264 226 245 240 239 239 17 230 230 230 245 244 244 18 230 230 230 250 249 249 19 230 230 230 249 249 249 20 230 230 230 249 249 249 21 230 230 230 249 249 249 22 230 230 230 249 249 249 23 230 230 230 249 249 249 24 230 221 226 249 249 249 25 222 221 221 249 249 249 26 222 221 221 249 249 249 27 222 221 221 249 249 249 28 222 221 221 249 249 249 29 —— ___ —— 249 249 249 30 —— ______249 249 249 31 —— —— —— 249 249 249 MONTH 267 221 235 250 221 236

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 180 175 178 2 179 176 177 3 179 176 177 4 179 176 178 5 179 176 177 6 178 176 177 7 177 168 175 178 176 177 8 179 176 177 9 204 203 203 177 153 174 179 176 178 10 204 203 203 179 176 178 11 204 203 203 177 161 174 179 176 177 12 204 203 203 177 155 173 182 177 179 13 204 203 203 174 165 173 178 176 177 14 213 203 207 176 130 170 15 213 211 212 176 130 155 16 213 212 213 176 129 149 17 215 213 213 179 173 177 175 130 162 18 213 204 213 185 175 177 175 129 148 19 213 212 212 131 129 130 20 214 212 213 182 174 179 130 129 129 21 213 212 213 179 177 177 130 129 129 22 214 213 213 181 177 178 134 133 133 23 242 212 223 182 176 180 140 136 137 24 250 213 245 180 177 178 138 138 138 25 251 244 248 179 176 177 138 137 137 26 251 248 250 138 137 137 27 252 248 251 178 176 178 138 137 138 28 254 250 253 179 176 178 139 137 138 29 254 248 251 180 131 173 147 139 141 30 255 251 252 180 176 178 142 138 139 31 255 249 251 181 177 178 MONTH 182 129 157 239 ST. CROIX RIVER BASIN 05341770 ST. CROIX RIVER AT AFTON, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 7.4 7.1 7.2 7.2 7.1 7.1 7-5 7.1 7.3 8.0 7.5 7.6 7.5 7.3 7.4 7.8 7.4 7.6 8.0 7.5 7.6 8.3 7.4 7.6 9 8.2 7.4 7.5 10 7.8 7.5 7.6 11 7.8 7.5 7.6 12 7.9 7.4 7.6 13 7.6 7.5 7.5 14 7.7 7.6 7.6 15 7.8 7.6 7.6 16 8.4 7.6 7.7 17 7.7 7.5 7.6 18 7.7 7.6 7.6 19 7.7 7.5 7.5 20 7.7 7.5 7.6 21 7.8 7.6 7.7 22 8.1 7.6 7.7 23 8.0 7.6 7-7 24 7.7 7.6 7.6 25 8.0 7.6 7.7 26 8.1 7.7 7.8 27 7.6 7.4 7.5 8.3 7.6 7.8 28 7.9 7.3 7.5 8.0 7.6 7.8 29 7.6 7.1 7.4 7.8 7.5 7.6 30 7.4 7.0 7.2 7.7 7.5 7.6 31 7.8 7.2 7.4 MONTH 8.4 7.1 7.6

TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY

1 — _ —— 7.0 6.5 7.0 4.5 4.5 4.5 2.0 1.5 2.0 2 —— — _ —— 7.5 6.5 7.0 4.5 4.0 4.5 2.0 1.5 2.0 3 14.5 13.5 14.0 8.5 7.0 7.5 4.5 3.5 4.0 2.0 1.5 1.5 4 14.0 13.5 13.5 8.5 7.5 8.0 4.0 2.5 3.0 2.0 1.5 1.5 5 14.0 13.5 14.0 8.0 7.5 8.0 2.5 2.0 2.5 2.0 1.5 1.5

6 13.5 13.5 13.5 8.0 7.5 7.5 3.0 2.0 2.5 2.0 1.5 1.5 7 14.0 13.0 13.5 8.5 7.5 8.0 3.0 2.5 2.5 1.5 1.5 1.5 8 14.0 13.0 13.5 8.0 7.5 8.0 2.5 2.5 2.5 1.5 1.5 1.5 9 — _ —— —— 8.0 7.0 7.5 2.5 2.0 2.5 1.5 1.5 1.5 10 —— —— —— 8.0 6.5 7.5 2.5 2.0 2.0 1.5 1.5 1.5

11 ______8.0 7.5 8.0 2.0 2.0 2.0 1.5 1.5 1.5 12 —— —— 8.5 7.5 8.0 2.0 2.0 2.0 2.0 1.5 1.5 13 —— —— —— 9.0 7.5 8.0 2.0 2.0 2.0 1.5 1.5 1.5 14 —— —— —— 9.0 8.0 8.5 2.5 2.0 2.0 2.0 1.5 1.5 15 13.0 12.5 12.5 9.0 8.0 8.5 2.0 2.0 2.0 1.5 .5 1.0

16 13-0 12.5 12.5 8.5 8.0 8.5 2.0 2.0 2.0 .5 .5 .5 17 12.5 12.5 12.5 8.5 8.0 8.0 2.0 2.0 2.0 .5 .5 .5 18 13.5 12.0 12.0 8.0 8.0 8.0 2.0 2.0 2.0 .5 .5 .5 19 12.5 11.5 12.0 8.0 7.5 8.0 2.0 2.0 2.0 .5 .5 .5 20 —— —— —— 7.5 7.5 7.5 2.0 2.0 2.0 .5 .5 .5

21 ______7.5 7.0 7.5 2.0 2.0 2.0 .5 .5 .5 22 —— —— —— 7.5 6.0 7.0 2.0 2.0 2.0 .5 .5 .5 23 —— —— 7.5 7.0 7.0 2.0 2.0 2.0 .5 .5 .5 24 —— —— —— 7.5 4.5 6.0 2.0 2.0 2.0 .5 .0 .5 25 —— —— —— 5.0 4.5 5.0 2.0 2.0 2.0 .5 .5 .5

26 ______5.0 5.0 5.0 2.0 2.0 2.0 .5 .0 .5 27 —— —— 5.0 5.0 5.0 2.0 2.0 2.0 .5 .5 .5 28 —— —— —— 5.0 4.5 5.0 2.0 2.0 2.0 .5 .5 .5 29 —— —— 5.0 4.0 4.5 2.0 2.0 2.0 .5 .5 .5 30 7.5 6.5 7.0 4.5 4.0 4.5 2.0 2.0 2.0 .5 .5 .5 31 6.5 6.5 6.5 2.0 1.5 2.0 .5 .5 .5 MONTH 9.0 4.0 7.0 4.5 1.5 2.5 2.0 1.0 240 ST. CROIX RIVER BASIN 05341770 ST. CROIX RIVER AT AFTON, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY .5 .5 .5 1.5 1.5 1.5 3.0 2.5 2.5 .5 .5 .5 1.5 1.5 1.5 3.0 3-0 3.0 .5 .5 .5 1.5 1.5 1.5 .5 .5 .5 2.0 1.5 1.5 .5 .5 .5 2.0 1.5 1.5 6 .5 .5 .5 2.0 1.5 1.5 7 .5 .5 .5 2.0 1.5 1.5 8 .5 .5 .5 1.5 1.5 1.5 9 .5 .5 .5 1.5 1.5 1.5 10 .5 .5 .5 1.5 1.5 1.5 11 1.0 .5 .5 2.0 1.5 1.5 12 1.0 .5 .5 2.5 1.5 2.0 13 1.0 .5 .5 2.5 2.0 2.5 14 1.0 .5 .5 2.5 2.0 2.5 15 1.0 .5 .5 2.5 2.0 2.5 16 1.0 .5 .5 2.5 2.5 2.5 17 .5 • 5 .5 2.5 2.5 2.5 18 .5 .5 .5 2.5 2.5 2.5 19 .5 .5 .5 2.5 1.5 2.0 20 .5 .5 .5 2.0 1.5 1.5 21 1.0 .5 .5 2.0 1.5 2.0 22 1.5 1.0 1.0 2.5 1.5 2.0 23 2.0 1.5 1.5 2.5 1.5 2.0 24 1.5 1.5 1.5 2.5 2.0 2.0 25 1.5 1.5 1.5 2.0 2.0 2.0 26 1.5 1.0 1.5 2.0 1.5 2.0 27 2.0 1.5 1.5 2.5 1.5 2.0 28 1.5 1.5 1.5 2.5 1.5 2.0 29 2.5 2.5 2.5 30 2.5 2.5 2.5 31 3-0 2.5 2.5 MONTH 2.0 .5 .5 3.0 1.5 2.0

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER

1 25.5 25.0 25.0 22.0 21.5 21.5 2 25.5 25.0 25.5 21.5 21.0 21.5 3 26.0 25.0 25.5 21.5 21.0 21.5 4 26.0 25.5 25.5 22.0 21.0 21.5 5 26.5 25.5 26.0 21.5 21.0 21.0 6 26.5 25.5 26.0 21.5 21.0 21.0 7 26.0 24.0 25.5 21.0 20.5 21.0 8 21.0 20.5 21.0 9 _ — 21.5 20.5 21.0 10 21.5 21.0 21.0

11 25.0 22.5 24.5 21.5 21.0 21.0 12 25.0 22.0 24.5 21.5 21.0 21.0 13 25-0 23.0 24.0 21.0 20.5 21.0 14 20.5 20.0 20.5 15 20.5 20.0 20.0 16 20.5 20.0 20.0 17 26.0 24.0 25.0 20.5 20.0 20.0 18 25-5 24.5 25.0 20.5 20.0 20.0 19 20.0 19.5 20.0 20 25.5 24.0 25.0 19.5 19.5 19.5

21 25.0 24.5 25.0 20.0 19.0 19.5 22 24.5 24.0 24.5 20.0 19.0 19.5 23 25.0 24.0 24.5 19.5 19.0 19.0 24 24.5 24.0 24.5 19.0 19.0 19.0 25 24.5 24.0 24.0 19.5 18.5 19.0 26 25.5 25-0 25.5 24.5 22.0 24.0 19.5 17.5 18.5 27 26.0 25.0 25.5 22.0 21.5 22.0 19.0 18.5 18.5 28 27.0 25.0 25.5 22.5 21.0 22.0 19.5 18.5 19.0 29 25-5 24.5 25.0 21.5 21.0 21.5 19.5 19.0 19.0 30 25.5 24.5 25.0 22.0 21.5 21.5 19.0 18.5 19.0 31 25.5 25.0 25.0 21.5 21.0 21.5 MONTH 22.0 17.5 20.0 241 ST. CROIX RIVER BASIN

05341770 ST. CROIX RIVER AT AFTON, MN--Continued OXYGEN, DISSOLVED (DO), MO/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

OCTOBER NOVEMBER DECEMBER JANUARY

1 ___ _ _ 12.0 10.0 10.8 11.6 11.0 11.3 15-9 13.6 14.9 2 10.9 6.4 9.0 15.0 10.0 11.4 12.1 10.7 11.3 15.9 13-3 15.1 3 11.7 8.0 9.2 12.9 10.0 9.9 12.8 10.8 11.6 15.4 13.1 14.4 4 8.7 7.7 8.1 12.4 9.8 10.6 13.2 11.2 12.1 13.3 12.9 13.1 5 8.0 7.5 7.8 9.9 8.5 9.0 15-5 11.1 13.0 13.1 12.8 13.0 6 8.6 7.7 8.0 11.3 10.2 10.7 14.5 11.0 12.2 13-5 12.9 13-1 7 11.2 7.7 8.5 12.9 q.i 10.1 14.6 10.5 12.0 13.2 12.7 13.0 8 13.3 8.3 9.9 11.4 9.2 10.4 14.0 11.4 12.2 13.0 12.8 12.9 9 —— —— 12.2 9.7 10.6 14.2 11.3 12.0 13.0 12.4 12.6 10 —— —— —— 10.8 8.5 9-3 12.9 11.9 12.3 12.5 12.2 12.4 11 ______10.2 8.3 8.9 15.4 12.2 12.8 13.0 12.3 12.6 12 —— —— 10.5 8.4 9.3 13.0 12.5 12.7 12.7 12.3 12.5 13 —— 11.2 8.5 10.0 13.0 12.5 12.7 12.6 12.3 12.4 14 —— 11.3 10.3 10.7 12.8 12.2 12.5 12.8 12.3 12.5 15 9.7 7.5 8.2 11.0 10.0 10.4 13.0 12.3 12.6 12.4 12.0 12.2 16 10.8 8.0 8.7 10.6 10.1 10.4 13.5 12.1 12.9 12.1 11.6 11.9 17 10.2 7.9 9-0 10.6 10.3 10.4 13.1 12.2 12.6 12.1 11.4 11.8 18 9.2 8.2 8.8 10.8 10.4 10.6 13-3 11.9 12.7 13.9 11.2 11.9 19 12.2 8.7 9.7 11.5 10.7 11.1 13.5 12.6 13.1 11.4 11.1 11.2 20 10.4 8.1 8.7 11.8 11.2 11.4 13.4 12.7 13.2 12.6 10.6 11.1 21 ______12.0 11.1 11.4 13-6 12.7 13.1 10.7 10.5 10.6 22 —— —— 13.2 11.0 11.5 13.9 13.6 13.7 12.0 10.4 11.1 23 11.0 10.9 10.9 13.4 12.9 13.2 11.2 10.8 11.0 24 —— —— 13.4 10.7 12.0 13.3 12.3 12.8 11.1 10.6 10.8 25 —— —— —— 13-5 10.5 11.8 12.6 11.9 12.3 11.0 10.6 10.9 26 ______10.6 10.4 10.5 13-0 12.1 12.6 12.0 10.7 11.3 27 —— —— —— 12.0 10.4 10.9 13.4 12.9 13.1 12.3 10.8 11.4 28 —— —— 11.2 10.8 11.0 14.1 12.8 13.6 13-3 11.0 12.0 29 —— —— —— 14.8 11.1 12.5 13.9 12.8 13.5 11.9 10.4 11.2 30 13.5 10.7 11.8 13.2 10.9 11.9 15.3 12.6 13.7 11. Q 10.1 10.7 31 11.8 9-9 10.6 15.3 14.2 14.9 12.7 9.9 10.4 MONTH 15.0 10.7 15.5 10.5 12.7 15-9 9.9 12.1

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

FEBRUARY MARCH APRIL MAY 1 11.0 9-9 10.4 12.6 8.7 9.6 12.0 10.5 10.9 2 10.4 10.0 10.1 13-0 9.2 9.9 11.9 10.8 11.2 3 12.4 10.0 10.7 9-5 8.9 9.2 4 10.4 9-9 10.2 9.8 8.8 9.3 5 12.5 9-9 10.7 11.8 8.6 10.3 6 12.3 10.1 11.2 11.7 9.6 10.5 7 11.4 9-9 10.2 11.1 9.5 10.1 8 12.6 9-9 10.8 13.9 9.9 10.9 9 12.0 9.5 10.4 10.6 9.7 10.1 10 10.3 9.2 10.0 13.3 10.4 11.8 11 13.2 9.7 10.8 13.6 10.4 12.1 12 12.1 9-6 10.5 13.6 12.0 12.7 13 10.9 9-1 9.7 12.6 10.3 11.3 14 9.8 8.9 9-4 13.9 10.6 11.8 15 9.2 8.8 9.1 12.0 10.7 11.5 16 10.7 8.7 9.3 11.3 9-9 10.5 17 9.5 8.9 9.1 12.5 9.9 10.8 18 9-2 8.9 9-1 13.1 9-8 11.0 19 9.2 8.8 9.0 12.3 11.2 11.8 20 9.3 8.8 9-0 11.6 10.8 11.2 21 9.2 8.8 9.0 11.4 10.1 10.7 22 10.4 9.1 9.7 11.9 10.7 11.1 23 10.0 9-3 9.6 12.5 11.0 11.7 24 11.0 9-3 10.1 12.4 10.6 11.2 25 10.3 8.7 9.5 13.9 10.4 12.1 26 9.8 8.8 9.2 12.2 11.0 11.6 27 10.1 8.8 9.2 15.1 11.4 12.8 28 10.2 8.7 9.3 15.1 12.2 13.4 29 14.4 11.5 13.0 30 13.1 10.8 11.4 31 12.3 10.5 10.8 MONTH 13.2 15.1 8.6 11.2 ST. CROIX RIVER BASIN

05341770 ST. CROIX RIVER AT ftPTON, MN--Contlnued

OXYGEN, DISSOLVED (DO), MO/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPT 3MBER

1 14.8 6.2 8.5 2 11.5 5.3 6.5 3 11.3 5.0 7.6 4 12.7 7.4 9.3 5 10.8 6.9 8.5 6 12.4 7.0 9.1 7 11.5 7.9 9-2 8 15.7 7.1 10.2 9 13.2 7.5 9.1 10 10.2 7.0 9-3 5.2 6.7

11 10.0 7-4 8.5 9.6 5.0 6.6 12 11.7 7.5 8.7 8.8 4.9 6.8 13 10.7 7.8 9-0 7.8 5.4 6.1 14 10.6 8.3 9.4 8.3 6.5 7.0 15 10.6 7.1 8.0 16 11.5 7.5 8.7 17 10.6 7.9 . 9.2 18 12.2 8.0 9-0 19 10.0 7.7 8.3 20 11.7 7.7 8.9 21 11.7 8.3 9-4 22 11.8 8.9 9.8 23 11.8 R.4 9.6 24 10.3 4.6 8.5 9.1 8.4 8.8 25 8.9 6.6 7.5 11.6 8.5 9-7 26 8.8 6.8 7-7 13.3 Q.I 10.2 27 9-2 6.6 7.8 12.2 7.5 10.4 13.5 8.5 10.1 28 12.5 7.0 9.0 16.9 11.1 13.7 13.1 7.6 9.6 29 9.6 6.3 7.4 15.5 10.2 12.6 10.6 7.0 8.8 30 10.9 6.7 8.0 13.3 7.2 9.6 10.2 6.7 7.5 31 11.8 8.3 9-3 12.6 6.9 9.0

MONTH 15.7 4.9 243 MISSISSIPPI RIVER MAIN STEM 05344500 MISSISSIPPI RIVER AT PRESCOTT, WI LOCATION.—Lat 44 O 44'45", long 92°48'00", in sec.9, T.26 N., R.20 W., Pierce County, Hydrologic Unit 07010206, on left bank at Prescott, 200 ft (6l m) downstream from St. Croix River, 300 ft (91 m) south of Chicago, Burlington 8c Quincy Railroad bridge, 800 ft (244 m) south of bridge on U.S. Highway 10, and at mile 811.4 (1,306 km) upstream from Ohio River. DRAINAGE AREA.—44,800 mi 2 (116,000 km2 ), approximately. PERIOD OP RECORD.—June 1928 to current year. REVISED RECORDS.—WSP 1508: 1941. WRD MN-74: 1973. GAGE.—Water-stage recorder. Datura of gage is 649.50 ft (197.968 m) National Geodetic Vertical Datum of 1929. Prior to Aug. 2, 1932, nonrecording gage at railroad bridge 300 ft (91 m) upstream at following datums: June 3, 1928, to Sept. 30, 1929, 19.27 ft '(5-873 m) higher; Oct. 1, 1929, to Sept. 30, 1930, 17.68 ft (5-389 m) higher; Oct. 1, 1930, to Aug. 1, 1932, 19.28 ft (5.877 m) higher. Aug. 2, 1932, to Oct. 30, 1938, water-stage recorder at present site at datum 1Q-2J ft (5.877 m) higher; Nov. 1, 1938,'to Sept. 7, 1971, water-stage recorder at present site at datum 50.00 ft (15.240 m) lower. Auxiliary water-stage recorder 10.7 mi (17.2 km) downstream from base gage. REMARKS.—Records good. Some regulation by reservoirs, navigation dams, and powerplants at low and medium stages. Flood flow not materially affected' by artificial storage. AVERAGE DISCHARGE. — 54 years, 16,370 ftVs (463.6 mVs), 4.96 in/yr (126 mm/yr); median of yearly mean discharges, 14,600 ft3/ s (413 m3/ s ), 4.43 in/yr (113 mm/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge 228,000 ft 3 /s (6,460 m 3 /s) Apr. 18, 1965, <5age height, 43.11 ft (13.140 m); minimum daily, 1,380 ftVs (39-1 m3 /s) July 13, 1940; minimum gage height, 15.08 ft (4.596 m) Aug. 29, 1934, present datum. EXTREMES FOR CURRENT YEAR.--Maximum discharge, 86,700 ft 3 /s (2,460 m 3 /s) Apr. 21, gaE;e height, 34.51 ft (10.519 m): minimum daily, 6,860 ft3/ s (194 nP/s) Dec. 19; minimum gage height, 24.48 ft (7.462 m) Dec. 19-

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUL AUG SEP 1 8670 22700 12800 9600 7820 8700 42700 51800 41100 17500 12400 9070 2 9110 21200 13200 9840 8390 9240 49400 49000 40000 17300 11800 8480 3 8180 20500 13900 10100 7870 8930 57400 45700 38900 16900 12700 8300 4 10100 20100 12800 9820 8450 9150 59500 42800 38300 15900 12300 9000 5 10400 19600 13200 10100 8220 9060 63100 41900 37000 14800 9900 8370 6 12200 19000 11700 8940 8330 9680 65200 39700 35100 14000 10500 7870 7 13900 18400 11000 7950 7900 10700 67400 39200 34100 14700 10800 7710 8 14400 17500 11900 9040 8120 10500 68100 39000 31700 15200 10200 9 14900 16500 11700 9390 8690 10400 68000 38700 29800 17700 8900 9680 10 15400 15100 11900 8320 8020 9210 67500 38400 28200 19000 9320 9490 11 16100 15300 10900 8860 8540 9550 66200 39100 26000 21100 9510 10900 12 16100 16500 9290 9120 8220 10400 65100 39100 25500 21300 9320 9950 13 15700 16400 10100 8330 8130 10700 63200 40400 25100 22100 9170 10100 14 16200 15700 10800 9140 8420 10600 61300 41300 25000 22500 8020 11900 15 17200 15200 10600 8440 8460 11200 61500 42300 24100 23200 7740 12300 16 18300 15100 9170 8480 8370 12100 63700 44900 22300 22300 7710 13000 17 20800 14700 8190 8070 8680 12500 67500 46700 21200 21200 8670 12500 18 23900 14400 7590 8140 8970 15400 73000 48600 20300 19800 8420 14100 19 24500 14800 6860 8390 8490 16500 80500 51100 19400 19100 14200 20 27000 14900 7880 7830 8750 18100 85300 54700 19000 17700 14300 21 28800 14300 8270 8300 8540 19800 86300 58400 19200 19000 7640 14800 22 30100 13100 7940 8260 8960 21500 85300 60800 19300 19300 7930 14500 23 29800 12500 9540 7930 8870 23600 82300 60300 19700 17700 7840 13900 24 29200 12600 10600 7870 8720 27000 78800 58900 18500 16300 7810 13500 25 ^0 13300 9960 7790 8610 30300 75600 57100 18800 15500 8030 13400 26 27900 13200 9890 8300 8500 30900 71700 54700 19100 15600 7950 11300 27 26800 13000 9980 7960 8790 31200 68000 52500 18100 17900 7250 11700 28 26300 13100 9880 8240 8480 31600 64200 49900 18500 15800 7720 12100 29 25500 13600 10500 8020 —— 32800 61200 47200 18000 14200 7980 11000 30 24200 12900 10200 7940 —— 35200 56900 45300 18600 12900 9460 11200 31 23400 —— 9740 7890 —— 39300 —— 43300 —— 14200 8590 TOTAL 614160 475200 321980 266400 236310 545820 2025900 1462800 769900 551700 281730 336700 MEAN 19810 15840 10390 8594 8440 17610 67530 47190 25660 17800 11220 MAX 30100 22700 13900 10100 8970 39300 86300 60800 41100 23200 12700 14800 MIN 8180 12500 6860 7790 7820 8700 42700 38400 18000 12900 7250 7710 CFSM .44 .35 .23 .19 .19 .39 1.51 1.05 .57 .40 .20 .25 IN. .51 .39 .27 .22 .20 .45 1.68 1.21 .64 .46 .23 .28 CAL YR 1981 TOTAL 5592170 MEAN 15320 MAX 43400 MIN 4100 CFSM .34 IN 4.64 WTR YR 1982 TOTAL 7888600 MEAN 21610 MAX 86300 MIN 6860 CFSM .48 IN 6.55 244 MISSISSIPPI RIVER MAIN STEM 05344980 MISSISSIPPI RIVER AT LOCK AND DAM 3 NEAR RED WING, MN LOCATION.—Lat 44°36'36", long 92°36'36", in SWJNWJ sec.10, T.113 N., R.15 W., Gfoodhue County, Hydrologic Unit 07040001, on right bank on downstream side of dam, 5 mi (8 km) northwest of Red Wing, and at mile 796.7 (1,282 km) upstream from Ohio River. DRAINAGE AREA.—46,600 mi 2 (120,700 km 2 ), approximately. PERIOD OP RECORD.—Water years 1969 to current year. PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE: May 1976 to current year. pH: May 1976 to current year. WATER TEMPERATURES: August 1969 to current year. DISSOLVED OXYGEN: May 1976 to current year. INSTRUMENTATION.—Water-quality monitor since May 1976. REMARKS.- -Extremes are published for those years with 80 percent or more record. Malfunctions of the monitor resulted in less than 80 percent daily record. Water is pumped to a monitor that is inside a heated shelter; water temperature during the winter period may be affected. COOPERATION.—Discharge data furnished by the St. Paul District, Corps of Engineers. Water-quality monitor is operated by the Metropolitan Waste Control Commission, St. Paul, Minn. EXTREMES POR PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE (water year 1980-82): Maximum, 562 micromhos Dec. 21, 1979; minimum, 300 micromhos Apr. 21, 19&2. pH (water year 1980-82): Maximum, 8.8 units May 2-4, 6, 7, 1980; minimum, 7.2 units Sept. 15 and 24, 1980. WATER TEMPERATURES (water years 1970-78, 1980-82): Maximum, 30.5°C July 19, 1977; minimum, 0.0°C several days during winter. DISSOLVED OXYGEN (water year 1981-82): Maximum, 17.8 mg/L Dec. 11, 1981; minimum, 2.6 mg/L July 12, 13, 1982.

EXTREMES POR CURRENT YEAR.— SPECIFIC CONDUCTANCE: Maximum, 533 micromhos June 25-27; minimum, 300 micromhos Apr. 21. pH: Maximum, 8.5 units Aug. 16; minimum, 7-3 units Jan. 5, 6, Aug. 24, 25. WATER TEMPERATURES: Maximum, 29.0°C Aug. 19; minimum, 0.0°C several days during winter. DISSOLVED OXYGEN: Maximum, 17.8 mg/L Dec. 11; minimum, 2.6 mg/L July 12, 13.

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C) WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 446 439 441 418 408 415 426 419 423 2 444 440 442 420 407 413 427 420 423 3 452 445 449 416 405 413 434 427 431 4 445 444 444 423 411 420 447 435 442 5 —— —— —— 424 420 422 447 428 437 512 488 491 6 ______426 414 422 435 419 427 497 492 494 7 425 418 421 428 418 425 431 417 423 499 496 497 8 422 419 421 428 414 421 439 426 431 499 491 495 9 421 410 415 422 413 418 439 422 431 489 483 485 10 410 404 407 422 408 415 445 417 430 495 485 490 11 410 404 406 411 401 407 450 447 449 495 492 493 12 416 409 412 424 407 417 455 438 447 496 492 493 13 417 414 416 425 401 414 437 420 425 490 483 485 14 417 414 415 409 403 406 458 426 437 491 470 477 15 426 417 421 406 396 403 468 458 464 472 468 470 16 427 419 425 409 401 405 456 444 iin 9 472 469 470 17 423 415 419 414 410 412 450 447 447 478 474 476 18 426 407 418 416 407 413 448 424 439 477 470 473 19 408 395 400 409 402 406 461 426 431 471 467 468 20 S 400 403 408 405 406 435 421 430 473 466 469 21 404 393 398 410 402 407 454 434 444 512 473 483 22 408 402 405 406 389 397 485 447 460 497 468 486 23 402 394 398 401 392 397 490 479 485 499 472 481 24 402 394 397 414 401 408 492 481 488 498 467 480 25 407 400 404 419 415 417 497 491 493 511 479 491 26 407 403 405 417 410 415 499 452 494 500 464 482 27 406 393 402 419 413 416 494 479 486 474 470 472 28 409 405 406 425 413 421 477 468 471 473 458 465 29 411 405 400 427 423 425 475 468 471 463 460 462 30 412 404 410 428 423 427 515 474 496 461 455 458 31 416 400 410 517 514 5jl5 456 454 455 MONTH 428 389 413 517 417 52 245 MISSISSIPPI RIVER MAIN STEM 05344980 MISSISSIPPI RIVER AT LOCK AND DAM 3 NEAR RED WING, MN—Continued

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C) : WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX WIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 460 456 457 462 446 455 496 482 486 426 425 425 2 461 459 460 454 446 451 484 472 480 425 425 425 3 460 458 459 453 451 452 471 439 453 425 424 425 4 462 460 462 461 452 457 438 432 434 425 424 424 5 461 457 459 462 459 461 438 430 434 424 424 424 6 460 458 459 464 460 462 432 426 429 4-24 423 424 7 459 457 459 470 462 464 430 419 425 418 417 418 8 460 458 459 494 470 480 419 405 413 411 410 410 9 460 458 424 500 490 496 410 400 406 405 403 404 10 459 456 458 497 492 495 404 394 400 398 397 398 11 454 451 453 453 447 450 404 395 399 392 391 392 12 448 447 448 454 451 452 404 397 401 389 388 388 13 444 435 440 457 444 450 411 401 405 388 388 388 14 433 431 432 465 453 458 305 304 305 389 388 389 15 429 426 427 464 461 462 305 304 305 389 388 389 16 425 423 424 463 450 455 305 304 305 389 389 389 17 425 422 424 492 458 476 305 304 305 389 389 389 18 424 423 423 514 495 504 305 304 304 390 389 389 19 430 424 428 517 509 514 304 302 303 390 389 389 20 432 427 429 507 483 493 303 301 302 394 393 394 21 434 428 431 483 467 474 302 300 301 397 397 397 22 435 434 435 474 466 470 302 301 301 401 400 4,01 23 439 435 438 475 466 472 323 322 322 404 403 404 24 454 439 446 477 466 471 344 343 343 408 408 408 25 , 469 454 461 480 473 478 365 364 364 413 412 413 26 473 467 469 476 472 474 386 385 385 421 415 418 27 473 468 470 481 474 478 406 405 406 426 425 426 28 471 460 467 488 482 485 426 426 426 432 432 432 29 —— —— —— 496 488 492 426 425 426 438 437 438 30 —— —— —— 500 495 498 426 425 425 443 443 443 31 —— —— —— 510 487 502 449 448 448 MONTH 473 422 446 517 444 474 496 300 380 449 388 410

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 454 452 453 508 507 508 516 514 515 404 403 403 2 460 458 459 508 507 508 515 513 514 404 403 404 3 467 466 466 508 506 507 513 512 513 404 402 403 4 472 471 471 507 505 506 513 512 512 403 402 403 5 479 477 478 506 504 505 507 504 506 404 403 403 6 485 484 485 506 504 506 500 497 499 405 404 404 7 491 489 490 506 506 506 492 494 495 405 404 405 8 497 495 496 506 506 506 487 484 485 404 404 404 9 500 494 497 506 504 505 485 484 484 404 404 404 10 490 487 489 505 501 503 485 484 484 405 • 404 405 11 483 483 483 502 500 501 485 484 485 406 405 405 12 479 477 479 503 502 503 485 483 484 405 402 404 13 476 474 475 504 503 503 485 483 484 405 402 404 14 471 471 471 504 503 504 485 484 485 405 404 405 15 466 463 465 505 504 505 486 485 485 405 404 4r05

16 461 461 461 505 504 504 490 '488485 487 404 403 403 17 472 471 471 505 504 504 489 489 404 403 403 1? 484 483 483 505 ' 503 504 489 487 488 405 404 404 19 494 493 493 505 503 504 489 488 489 406 405 405 20 505 504 504 506 505 506 489 487 488 405 404 404 21 517 516 516 513 505 509 487 485 486 404 391 398 22 526 524 526 514 512 513 488 485 486 393 391 392 23 532 529 530 513 511 512 488 486 487 393 392 393 24 532 531 531 515 512 514 487 483 485 393 391 393 25 533 532 533 516 514 515 475 473 474 392 392 392 26 533 532 533 515 513 514 466 464 465 393 392 392 27 533 531 532 515 514 515 456 455 455 394 393 393 28 532 530 531 515 514 515 445 444 444 394 394 394 29 532 531 532 514 513 514 435 434 434 395 394 395 30 532 507 517 513 509 511 425 424 425 395 394 394 31 —— —— —— 514 509 512 415 413 414 MONTH 533 452 495 516 500 508 516 413 481 406 391 401 246 MISSISSIPPI RIVER MAIN STEM 05344980 MISSISSIPPI RIVER AT LOCK AND DAM 3 NEAR RED WING, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN ME,AN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY. 1 7.9 7.8 7.8 8.2 8.1 8.1 7.9 7.8 7.9 2 7-8 7.8 7.8 8.2 8.1 8.1 7.9 7.8 7.9 3 7.8 7.8 7.8 8.2 8.0 8.1 7.9 7.8 7.9 4 7.8 7.8 7.8 8.2 8.1 8.2 7.9 7.8 7.8 5 7.8 7-7 7.8 8.2 8.1 8.2 7.9 7.8 7.8 7,5 7.3 7.3 6 7.8 7.7 7,7 8.1 7.9 8.0 7.8 7.8 7.8 7.8 7,3 7,5 7 8.0 7.9 8,0 8.2 8.0 8.1 7.8 7.7 7!. 7 7.7 7.7 7.7 8 8.0 7.9 8.0 8.1 8.0 8.0 7.8 7.7 7.7 7.7 7.6 7.7 9 8.0 8.0 8.0 8.1 7,9 8.0 7.8 7.7 7.8 7.7 7.6 7.7 10 8.0 7.9 7.9 8.0 7.9 8.0 7.8 7.8 7.8 7.7 7.6 7.6 11 8.0 7.9 7.9 8.0 7.9 8.0 7.8 7.8 7.8 7.7 7.6 7.6 12 8.1 8.0 8.0 8.1 7.9 8.0 7.8 7.7 7.7 7.7 7.6 7.6 13 8.1 8.0 8.1 8.1 8.0 8.0 7.7 7.6 7.7 7.7 7.6 7.6 14 8.0 8.0 8.0 8.1 8.0 8.0 7 r 8 7.7 7.7 7.7 7.6 7.6 15 8.1 8.0 8.0 8.0 7.9 8.0 7.8 7.8 7.8 7.6 7.5 7.6 16 8.0 8.0 8.0 8.0 7.9 8.0 7.6 7.5 7.5 17 8.0 7.9 8.0 8.0 7.9 8.0 rTa 778 7.8 7,6 7.6 7.6 18 8.0 8.0 8.0 8.0 7.9 8.0 7.8 7.7 7.7 7.6 7.5 7.6 19 8.1 8.0 8.1 7.9 7.8 7.9 7.8 7.7 7.7 7.5 7.5 7.5 20 8.1 8.0 8.1 7.9 7.8 7.9 7.8 7.7 7.7 7.6 7.5 7.5 21 8.1 8.0 8.1 7.9 7.8 7.9 7.8 7.7 7.7 22 8.2 8.1 8.1 7.9 7.8 7.9 7.7 7.6 7.7 23 8.2 8.1 8.1 7.9 7.8 7.8 7.7 7.6 7.7 24 8.2 8.0 8.2 7.9 7.8 7.9 7.7 7.7 7.7 25 8.2 8.1 8.2 7.9 7.9 7.9 7.7 7.6 7.7 8.3 8.2 8.2 7.9 7.8 7-9 7.6 7.6 7.6 If 8.2 8.0 8.2 7.9 7.8 7.8 7.6 7.5 7.5 7.6 7.6 7.6 28 8.2 8.1 8.1 7.9 7.8 7.8 7.5 7.5 7.5 7.6 7.5 7.6 29 8.2 8.2 8.2 7.9 7.8 7.8 7.5 7.4 7.5 7.6 7.6 7.6 30 8.1 8.1 8.2 7.9 7.8 7.9 7.6 7.4 7.5 7.6 7.6 7.6 31 8.2 8.1 8.1 7.6 7.5 7.6 7.6 7.6 7.6 MONTH 8.3 7.7 8.0

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 7.6 7.6 7.6 7.9 7.9 7.9 8.2 8.1 8.2 8.3 8.1 8.2 7.6 7.6 7.6 7.9 7.9 7.9 8.3 8.2 8.2 8.4 8.1 8.2 7.6 7.6 7.6 8.0 7.9 7.9 8.3 8.2 8.2 8.4 8.1 8.2 7.6 7.6 7.6 8.0 7.9 7.9 8.2 8.1 8.2 8.3 8.1 8.2 7.6 7.6 7.6 8.0 7.9 7.9 8.2 8.2 8.2 8.1 7.9 8.0 6 7.6 7.6 7.6 8.0 7.9 7.9 8.2 8.2 8.2 8.0 7.8 7.9 7 7.6 7.6 7.6 8.0 7.9 7.9 8.2 8.1 8.2 8.2 7.9 8.0 8 7.6 7.6 7.6 8.0 7.9 8.0 8.2 8.1 8.1 8.3 8.0 8.1 9 7.6 7.6 7.6 8.0 8.0 8.0 8.1 8.1 8.1 8.2 8.0 8.1 10 7.6 7.6 7.6 8.0 8.0 8.0 8.1 8.0 8.1 8.1 7.9 8.0 11 7.7 7.6 7.6 8,0 7.9 8.0 8.1 8.0 8.1 8.1 7.9 7.9 12 7.7 7.6 7.6 8.0 8.0 8.0 8.1 8.0 8.1 8.0 7.9 7.9 13 7.7 7-6 7.7 8.0 8.0 8.0 8.1 8.1 8.1 7.9 7.8 7.9 14 7.7 7.6 7.6 8.1 8.0 8.0 8.2 8.1 8.2 7.9 7.8 7.8 15 7.7 7.6 7.7 8.1 8.1 8.1 8.2 8.2 8.2 8.0 7.8 7.9 16 7.7 7.6 7.7 8.1 7.9 8.0 8.2 8.2 6.2 8.0 7.8 7.9 17 7.8 7.6 7,8 8.0 7.9 8.0 8.3 8.2 8.3 8.0 7.9 7.9 18 7.8 7.8 7.8 8.1 8,0 8.0 8.3 8.2 8,2 8.0 7.9 7.9 0 19 7.8 7.8 7 »8 8.1 8.1 8,1 8.2 8.2 8.2 8.1 7.9 8.0 20 7.8 7.8 7.8 8.1 8.1 8.1 8.3 8.1 B.2 8.1 7.9 8.0 21 7.8 7.8 7.8 8.1 8.1 8.1 8.3 8.2 8.2 8.1 7.9 8.0 22 7.8 7.8 7.8 8.1 8.1 8.1 8.3 8.1 8.2 8,0 7.8 7.9 23 7.9 7.8 7.8 8.1 8.0 8.1 8.2 8.1 8.2 7.8 7.8 7,8 24 7.9 7.8 I- 8 8.2 8.0 8.1 8.2 8.1 8.2 7.8 7.8 7.8 25 7.9 7.8 t.8 8.2 8.1 8.1 8.1 8.0 8.1 7.8 7.8 7.8 26 7.9 7.9 7.9 8.1 8.1 8.1 8.1 7.9 8.0 7.8 7.8 7.8 27 7.9 7.9 7.9 8.1 8.1 8.1 8.1 7.9 8.0 7.8 7.8 7.8 28 7.9 7,9 7.9 8.2 8.1 8.1 8.1 8.1 8.1 7.8 7.7 7.8 29 8.2 8.2 8.2 8.3 8.2 8.3 7.8 7.7 7.8 30 8.2 8.2 8.2 8.3 8,2 8.2 7.8 7.8 7.8 31 8.3 8.2 8.2 8.0 7.8 7.9 MONTH 7.9 7.6 7.7 7,9 8.0 7.9 8.2 8.4 7.7 7.9 247 MISSISSIPPI RIVER MAIN STEM 05344980 MISSISSIPPI RIVER AT LOCK AND DAM 3 NEAR RED WING, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER

1 8.0 7.9 7.9 8.4 8.2 8.3 8.2 8.1 8.1 7.9 7.5 7.7 2 8.1 7.9 8.0 8.4 8.3 8.3 8.2 8.0 8.1 7.8 7.6 7.7 3 8.0 7.9 8.0 8.4 8.3 8.3 8.3 8.1 8.2 7.8 7.7 7.8 4 7.9 7-9 7.9 8.4 8.3 8.3 8.3 8.1 8.2 7.8 7.6 7.7 5 8.0 7.9 7.9 8.4 8.2 8.2 8.2 8.2 8.2 7.9 7-7 7.8 6 8.0 7.9 8.0 8.2 8.2 8.2 8.3 8.2 8.2 7.8 7.6 7.7 7 8.0 7.9 8.0 8.2 8.2 8.2 8.4 8.2 8.3 7.8 7.7 7.7 8 8.0 7.9 7.9 8.2 8.1 8.2 8.3 8.1 8.2 7.9 7.7 7.8 9 8.0 7.9 7.9 8.2 8.0 8.1 8.2 8.1 8.2 7.9 7.8 7.8 10 8.0 7.9 8.0 8.0 7.9 8.0 8.3 8.1 8.2 7.9 7.8 7.8 11 8.0 7.9 8.0 7.9 7.9 7.9 8.3 8.1 8.2 7.8 7.7 7.8 12 8.0 7.9 8.0 7-9 7.7 7.8 8.3 8.1 8.2 7.7 7.6 7.7 13 8.0 7.9 7.9 8.0 7.6 7.8 8.2 8.1 8.1 7.8 7.6 7.7 14 7-9 7.9 7.9 8.0 7.9 8.0 8.2 8.1 8.1 7.8 7-7 7.8 15 7.9 7.8 7.8 8.0 7.9 8.0 8.2 8.0 8.1 7.8 7.7 7.8 16 8.0 7.7 7.9 8.0 7.9 7.9 8.5 8.0 8.2 7.9 7.7 7.8 17 8.0 7.9 7.9 7.9 7.8 7.9 8.2 7.9 8.1 8.0 7.8 7.9 18 8.0 7.9 8.0 7.9 7.8 7-9 8.2 7.9 8.1 8.0 7.8 7.9 19 8.1 7.9 8.0 8.0 7.9 7.9 8.1 7.9 8.0 7.9 7.8 7.9 20 8.1 8.0 8.0 8.1 8.0 8.0 8.0 7.8 7.9 8.0 7.8 7-9 21 8.1 8.0 8.0 8.1 8.0 8.1 8.0 7.7 7.9 8.1 7.8 7.9 22 8.2 8.0 8.1 8.1 8.0 8.0 7-8 7.7 7.7 8.2 7-9 8.0 23 8.2 8.0 8.1 8.1 8.1 8.1 7.7 7.5 7.6 8.3 8.1 8.2 24 8.1 8.0 8.1 8.1 8.1 8.1 7-5 7.3 7.4 8.3 8.1 8.2 25 8.1 8.0 8.1 8.1 8.0 8.1 8.0 7.3 7.7 8.2 7.9 8.1 26 8.1 8.0 8.1 8.0 7.9 8.0 7.9 7.8 7.8 8.2 8.0 8.1 27 8.1 8.0 8.1 8.1 7.9 8.0 8.0 7.7 7.9 8.2 8.1 8.1 28 8.2 8.0 8.1 8.2 8.0 8.0 7.9 7.7 7.8 8.2 8.1 8.2 29 8.2 8.1 8.2 8.2 7.9 8.1 7.9 7.7 7.8 8.2 8.2 8.2 30 8.3 8.1 8.2 8.3 8.0 8.1 7.8 7.7 7.8 8.2 8.2 8.2 31 —— —— —— 8.3 8.1 8.2 7.8 7.6 7.6 MONTH 7.7 8.4 7.6 8.1 8.5 7.3 8.3 7.5 7.9

TEMPERATURE WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 15.5 13.5 14.5 9.5 7.5 9.0 2.5 2.0 2.0 2 14.5 13.5 14.0 10.0 8.0 9.0 2.5 2.0 2.0 3 14.0 13.0 13.5 10.0 8.5 9.5 2.0 1.0 1.5 4 13.0 13.0 13.0 10.0 9.5 10.0 1.5 1.0 1.0 5 10.0 9.0 9.5 1.0 .5 1.0

6 9.0 8.0 8.5 1.5 1.0 1.0 0 .0 .0 7 13.5 13.5 13.5 8.5 8.0 8.5 2.0 1.5 1.5 0 .0 .0 8 13.5 13.0 13.5 9.0 7.5 8.5 1.0 .5 1.0 ,0 .0 .0 9 13.5 13.0 13.0 7.5 7.0 7.5 1.0 .5 1.0 ,0 .0 .0 10 13.5 13.0 13.0 7.5 6.5 7.0 2.0 .5 .5 ,0 .0 .0

11 13.0 13.0 13.0 7.5 7.0 7.0 1.0 .5 1.0 ,0 .0 .0 12 13.0 12.5 13.0 7.5 6.5 7.0 1.0 ..0 1.0 ,0 .0 .0 13 13.5 12.5 13.0 7.0 6.0 6.5 1.5 ..0 1.5 0 .0 .0 14 14.0 13.5 13.5 7-0 6.0 7.0 1.5 .5 1.0 ,0 .0 .0 15 14.0 13.5 13.5 7-5 7.0 7.0 .5 .5 .5 ,0 .0 .0

16 14.0 13.0 13.5 7.5 6.5 7.0 .5 .0 .5 ,0 .0 .0 17 14.0 13.5 13.5 7.0 6.5 7.0 .5 .0 .5 ,0 .0 .0 18 13.0 11.5 12.0 7.0 6.5 6.5 .5 .5 .5 ,0 .0 .0 19 11.5 10.5 11.0 6.5 5.0 5.5 .5 .5 .5 ,0 .0 .0 20 11.5 11.0 11.5 5.0 3.5 4.5 .5 .0 .5 ,0 .0 .0 21 11.5 11.0 11.0 3.5 3.0 3.5 ..0 .5 .5 22 11.0 9.5 10.0 3.5 2.5 3.0 ..0 .0 .5 23 9.5 9.0 9.0 3.0 2.5 2.5 .5 .0 .5 24 11.0 7.5 8.0 3.0 2.5 2.5 .5 .0 .0 25 8.5 7.0 7.5 3.0 3.0 3.0 .5 .0 .0 26 8.0 7.0 7.5 3.0 2.5 3.0 .5 .0 .0 27 8.5 7.5 8.0 3.0 2.5 2.5 .5 .0 .0 1.5 1.0 1.5 28 8.5 7.5 7.5 2.5 2.0 2.5 .5 .0 .0 1.5 1.0 1.5 29 8.5 7.5 8.0 2.5 2.5 2.5 .5 .0 .0 1.5 1.5 1.5 30 10.0 8.0 9.0 2.5 2.0 2.0 .0 .0 .0 1.5 1.0 1.5 31 10.0 7.5 9.5 .0 .0 .0 1.5 1.0 1.5 MONTH 10.0 2.0 6.0 2.5 .0 .5 248 MISSISSIPPI RIVER MAIN STEM 053414980 MISSISSIPPI RIVER AT LOCK AND DAM 3 NEAR RED WING, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 1.5 1.0 1.5 1.5 1.5 1.5 5.5 4.5 5.0 14.0 12.0 12.5 2 1.5 1.0 1.5 1.5 1.5 1.5 6.0 5.0 5.5 14.5 12.5 13.5 3 1.5 1.0 1.0 1.5 1.0 1.0 6.0 2.5 4.5 15.5 13.5 14.5 4 1.0 1.0 1.0 1.5 1.0 1.0 3.5 2.0 2.5 16.5 14.5 15.5 5 1.0 1.0 1.0 1.5 1.0 1.5 3.5 2.5 3.0 16.0 14.5 15.5 6 1.0 1.0 1.0 1.5 1.0 1.5 3.5 2.0 3.0 14.0 13.5 13.5 7 1.0 1.0 1.0 1.0 1.0 1.0 3.5 2.5 3.0 14.5 13.0 13.5 8 1.0 1.0 1.0 1.0 1.0 1.0 2.5 2.0 2.5 15.5 13.5 14.5 9 1.0 1.0 1.0 1.0 1.0 1.0 3.0 2.0 2.5 15.5 14.0 15.0 10 1.0 1.0 1.0 1.0 1.0 1.0 3.0 2.5 2.5 16.5 14.5 15.5 11 1.0 1.0 1.0 2.0 1.5 1.5 4.0 2.5 3.0 17.5 15.5 16.5 12 1.0 1.0 1.0 1.5 1.5 1.5 4.5 3.5 4.0 16.5 15.5 16.0 13 1.0 1.0 1.0 2.0 1.0 1.5 4.5 4.0 4.0 16.5 16.0 16.0 14 1.0 1.0 1.0 2.0 1.5 2.0 6.0 5.5 6.0 18.0 16.0 17.0 15 1.0 1.0 1.0 2.0 1.5 1.5 7.0 5.5 6.5 18.5 16.5 17.5 16 1.0 1.0 1.0 2.0 2.0 2.0 8.0 6.5 7-0 18.5 17.0 17.5 17 1.0 1.0 1.0 2.5 2.0 2.0 8.5 7.0 7.5 18.5 17-5 18.0 18 1.5 1.0 1.0 2.5 2.0 2.5 8.5 7.5 8.0 18.5 17.0 18.0 19 1.5 1.0 1.0 2.5 1.5 2.0 8.5 6.5 7.5 19.0- 17.5 18.5 20 1.5 1.0 1.5 2.0 1.5 2.0 7.5 6.0 6.5 19.0 18.0 18.5 21 1.5 1.0 1.5 2.5 1.5 2.0 8.5 6.5 7.5 18.0 16.5 17.0 22 1.5 1.0 1.5 3.0 2.0 2.5 9.5 7.5 8.5 16.5 16.0 16.5 23 1.5 1.5 1.5 3.0 2.0 2.5 9.5 8.0 9.0 17.0 16.0 16.5 24 1.5 1.0 1.5 3.5 2.5 3.0 10.5 8.5 9.5 18.0 16.5 17.0 25 1.5 1.0 1.0 2.5 2.0 2.5 11.0 10.0 10.5 18.0 17.0 17.5 26 1.5 1.0 1.5 3.0 1.5 2.5 11.0 10.0 10.5 17.5 17.0 17-0 27 1.5 1.5 1.5 3.5 2.0 2.5 11.5 10.5 11.0 18.0 17.0 17.0 28 1.5 1.5 1.5 4.5 2.5 3.0 12.5 11.5 12.0 20.0 17-5 18.5 29 —— —— —— 5.0 3.5 4.0 13-0 12.0 12.5 20.0 19.0 19.5 30 —— —— —— 6.0 4.5 5.0 12.5 12.0 12.0 21.0 19.5 20.0 31 —— —— —— 6.5 4.5 5.5 20.5 19.0 19.5 MONTH 1.5 1.0 1.0 6.5 1.0 2.0 13.0 2.0 6.5 21.0 12.0 16.5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER

1 20.0 18.5 19.0 23.0 21.5 22.5 26.5 23.5 24.5 22.5 20.5 21.5 2 20.0 18.5 19.0 23.0 22.0 22.5 25.0 23.5 24.0 21.0 20.0 20.5 3 20.0 18.0 19.0 23.5 22.0 23.0 27.5 24.0 25.5 21.5 19.5 20.0 4 20.0 18.0 19.0 24.5 23.0 23-5 27.0 25.0 25.5 20.5 19.5 20.0 5 19.5 18.5 19.0 25.0 24.0 24.5 28.0 25.0 26.0 22.0 19.5 20.5

6 19.0 18.5 18.5 25.5 23.5 24.5 27-5 25.0 26.0 21.0 19.0 19.5 7 19.5 18.0 18.5 24.0 23.5 24.0 28.5 25.5 26.5 19.5 18, 19.0 8 20.5 18.5 19.5 23.5 22.5 23.0 26.0 24.5 25.0 20.0 18, 19-0 9 20.0 19.0 19.5 23.5 22.5 23.0 24.0 22.5 23.5 21.0 18, 19.5 10 19.5 18.0 18.5 23.5 22.0 23.0 23.0 22.0 22.5 21.5 19.0 20.0

11 20.5 18.5 19.0 22.5 21.5 22.0 23.5 21.5 2^2.5 21.0 19.5 20.0 12 21.0 19.5 20.0 23.0 21.5 22.0 23.0 22.0 22.5 21.5 20.0 20.5 13 20.5 19.0 19.5 24.0 22.5 23.0 24.5 22.5 23.5 21.5 20.0 21.0 14 20.0 19.5 19.5 24.0 23.5 24.0 25.5 23.0 24.0 21.5 18.5 20.0 15 19.5 19.0 19.0 24.0 23.5 23.5 27.0 24.5 25.5 20.5 18.0 19.5

16 20.0 18.5 19.5 24.0 23.0 23.5 28.0 25.5 27.0 20.0 16, 17.5 17 20.5 19.5 20.0 24.5 23.5 24.0 27.5 24.0 25.5 19.5 16, 18.0 18 20.0 19.5 20.0 25.0 23.5 24.0 27.0 24.5 26.0 19.0 17.0 18.0 19 20.0 19.5 19.5 25.0 23.5 24.5 29.0 25.0 26.0 18.0 16.5 17.0 20 19.5 19.0 19.5 25.0 23.5 24.5 26.0 25.0 25.5 17.5 16.0 17.0

21 20.0 19.0 19.5 26.5 24.0 25.0 27.0 24.0 25.5 18.0 15.0 16.0 22 21.0 19.0 20.0 26.5 25.0 25.5 25.5 24.5 25.0 15.5 14.5 15.0 23 21.0 19.5 20.0 26.5 25.0 25.5 26.0 23.5 25.0 18.0 15.0 16.0 24 20.5 20.0 20.0 26.5 25.0 25.5 25.5 23.5 2,4.5 17.0 15.5 16.0 25 21.0 19.5 20.0 27.0 25.5 26.0 25.0 23.5 24.0 16.0 15.0 15.5

26 21.0 19.5 20.5 26.0 25.0 25.5 25.5 23.5 24.5 15.5 14.5 15.0 27 23.0 20.5 21.5 27.5 25.0 26.0 24.0 22.5 23'. 0 15.0 14.5 14.5 28 23.0 21.5 22.5 27.0 25.0 25.5 23.0 21.5 22.0 15.0 14.5 14.5 29 23.0 22.5 22.5 26.5 24.0 25.0 22.0 20.5 21.0 15.5 15.0 15.0 30 23.0 21.5 22.0 25.5 23.5 24.5 24.0 20.5 22.0 18.0 15.5 16.5 31 25.0 23.5 24.0 22.0 20.0 20.5

MONTH 23.0 18.0 20.0 27.5 21.5 24.0 29.0 20.0 24.5 22.5 14.5 18.0 249 MISSISSIPPI RIVER MAIN STEM 053 lt lt980 MISSISSIPPI RIVER AT LOCK AND DAM 3 NEAR RED WING, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 8.0 7.4 7.7 12.1 10.7 11.2 13.0 12.3 12.5 2 9.2 7.3 7.9 12.7 10.9 11.4 12.6 12.1 12.3 3 8.2 7.5 7.8 12.8 10.8 11.5 15.0 12.1 13.0 4 8.0 7.9 7.9 12.2 11.5 11.9 15.0 12.7 13.2 5 —— —— —— 11.8 11.1 11.5 14.6 12.5 13.0 13.4 11.6 12.7 6 ______12.3 11.1 11.6 17.1 12.9 14.5 13.0 12.1 12.5 7 8.9 7.1 8.1 12.6 11.0 11.5 17.2 13.1 14.4 14.2 12.0 12.7 8 8.6 6.8 7.5 11.7 11.0 11.4 15.3 13.1 13.6 14.8 12.9 13.7 9 7.6 7.1 7.3 12.4 11.0 11.4 14.8 13.1 13.5 13.4 11.9 12.5 10 8.5 7.3 7.7 12.2 11.1 11.4 15.7 12.6 13.6 12.3 10.9 11.5 11 8.3 7.1 7.5 12.5 11.2 11.7 17.8 13.7 16.2 13.1 12.8 13.0 12 8.4 7.4 7.8 12.4 11.4 11.8 17.0 13.4 14.0 14.7 13.0 13.4 13 8.2 7.8 8.0 12.2 10.8 11.4 16.9 13.2 14.2 13.5 11.8 13.0 14 8.2 7.8 8.0 11.7 10.9 11.1 13.8 12.5 12.9 13.4 11.4 12.2 15 9.1 7.7 8.2 12.1 10.7 11.1 13.7 12.5 12.9 13.3 11.2 12.1 16 9.5 7.5 8.2 11.4 10.8 11.1 15.6 11.5 14.5 11.6 11.2 11.3 17 8.6 8.1 8.3 12.2 10.7 11.1 16.0 14.5 15.2 12.0 11.5 11.7 18 8.1 7.7 7.9 13.0 10.9 12.1 15.7 13.2 14.4 13.5 11.7 12.5 19 10.1 6.8 8.1 13.3 11.9 12.3 16.0 13.1 14.8 14.1 13.1 13.6 20 7.0 7.0 7.0 12.3 11.7 11.9 16.7 13.5 15.1 13.6 12.9 13.2 21 9.5 7.1 8.3 14.2 11.6 12.4 17.2 13.5 15.7 14.3 13.5 13.7 22 —— —— —— 15.2 12.0 13.4 17.2 13.0 15.2 13.7 12.8 13.4 23 —— —— —— 15.7 12.3 14.0 14.3 12.8 13.2 13.8 12.0 12.7 24 —— —— 13.8 12.1 12.6 17.2 14.8 15.8 12.5 11.3 11.8 25 —— —— —— 16.4 15.2 16.1 16.9 15.6 16.2 13.0 11.5 12.2 26 ______16.1 14.6 15.5 17.3 13.3 16.1 12.2 10.6 11.4 27 —— —— —— 15.2 14.5 14.9 15.4 12.8 13.8 11.3 8.6 10.7 28 11.4 10.1 10.4 15.8 15.0 15.4 15.3 12.6 13.8 11.5 10.1 10.8 29 11.4 10.3 10.8 17.2 12.0 14.5 15.2 13.7 14.4 12.4 10.3 11.3 30 11.9 10.8 11.3 12.9 11.9 12.3 14.3 11.5 13.0 11.4 10.3 10.8 31 14.0 10.8 11.4 13.3 11.6 —— 11.9 9.8 10.7 MONTH 17.2 10.7 12.4 17.8 11.5 14.2

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 11.9 10.3 10.9 11.8 11.2 11.4 10.1 9.5 9-8 11.3 6.4 10.2 2 11.7 10.1 10.5 12.5 11.5 11.9 10.3 9.8 10.0 11.1 9.8 10.4 3 12.5 10.4 11.3 12.5 11.2 11.8 10.4 9.2 9.6 10.8 9.8 10.3 4 12.3 10.3 11.2 14.5 12.2 12.8 10.3 9.1 9.7 10.1 6.4 9.1 5 11.9 10.0 11.1 15.7 12.0 14.5 10.5 9.7 10.0 9.3 8.6 9.0 6 11.8 9.9 10.7 15.2 11.5 13.2 11.0 9.4 10.2 9.2 8.2 8.8 7 12.1 11.1 11.5 14.2 11.0 12.4 11.8 9.7 10.7 9.6 8.7 9.1 8 11.7 10.4 10.9 13.7 10.9 12.5 12.0 10.4 11.0 10.2 6.3 8.9 9 10.3 9.3 9.6 13.9 10.8 11.9 12.1 11.2 11.5 9.5 6.3 8.3 10 10.0 8.1 8.9 13.8 11.0 12.0 13.8 11.8 12.6 9.1 6.3 7.3 11 9-6 8.4 8.8 14.5 10.6 11.7 12.9 12.0 12.5 8.8 6.3 6.7 12 10.9 8.5 9.2 12.3 10.3 10.8 12.6 12.2 12.4 9.0 6.3 8.5 13 9.9 9.1 9.4 12.1 9.9 10.7 13.3 12.0 12.6 9.1 6.6 8.0 14 9-9 9.5 9.7 12.7 10.2 11.2 12.2 11.4 11.7 6.8 6.7 6.7 15 10.8 9.9 10.3 12.1 9.8 10.4 12.0 11.3 11.6 7.0 6.9 6.9 16 10.8 10.3 10.5 12.5 12.0 12.3 12.3 11.2 11.6 7.2 7.1 7.1 17 11.6 11.0 11.5 11.8 9.3 10.6 11.8 11.0 11.3 7.3 7.3 7.3 18 11.6 10.8 11.2 9.7 9.3 9.5 11.9 10.9 11.4 7.5 7.5 7.5 19 11.8 10.8 11.2 9.5 9.1 9.4 11.2 10.7 10.9 8.5 7.7 8.1 20 13.9 10.9 11.6 9.4 9.0 9.2 11.4 10.4 10.9 8.5 7.9 8.2 21 13.5 10.6 11.3 10.5 9.3 9.6 12.1 10.6 11.3 8.2 7.7 8.0 22 12.9 10.6 11.4 10.2 9.3 9.8 12.1 10.9 11.5 8.0 7.8 7.9 23 11.7 10.7 11.0 10.5 9.5 10.0 12.6 10.0 11.4 8.4 7.8 8.0 24 12.7 10.3 11.2 12.5 8.3 9.9 12.1 11.4 11.7 8.6 7.9 8.2 25 11.3 10.1 10.6 11.5 8.1 9.8 11.4 11.0 11.2 8.5 7.9 8.2 26 11.4 10.4 10.9 12.4 10.6 11.4 11.3 10.5 10.9 8.2 7.9 8.0 27 12.1 10.7 11.2 12.5 10.6 11.4 11.4 10.1 10.7 8.2 7.7 7.9 28 12.4 11.2 11.6 11.7 10.6 11.1 10.3 10.2 10.2 8.6 7.6 8.0 29 11.6 11.0 11.3 10.9 10.3 10.5 8.5 7.7 8.0 30 11.6 10.8 11.3 10.5 10.1 10.2 8.4 7.5 7.9 31 12.1 9.7 10.4 8.0 7.5 7.7 MONTH 13.9 i.l 10.7 15.7 8.1 11.2 9.1 ll.l 11.3 6.3 8.2 250 MISSISSIPPI RIVSR MAIN STEM 05344980 MISSISSIPPI RIVER AT LOCK AND DAM 3 NEAR RED WING, MM—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 8.0 7.1 7.5 8.0 6.8 7.4 6.0 4.9 5.5 8.8 6.6 7.7 2 8.3 7.0 7.6 7.7 7.2 7.5 —— —— —— 7.6 6.3 7.0 3 8.4 7.2 7.7 7.9 7.2 7.5 —— —— —— 8.1 6.2 7.0 4 8.3 7.1 7.6 8.4 7.3 7.8 7.3 5.6 6.4 8.6 6.1 7.1 5 8.1 7.1 7.5 8.8 6.7 7.7 6.9 6.0 6.4 8.1 7.0 7.5 6 7.5 7.1 7.3 7.0 5.6 6.3 6.8 5.7 6.2 7.8 6.2 6.9 7 7.6 6.9 7.3 5.7 5.3 5.5 7.0 5.8 6.2 6.7 6.3 6.5 8 7.6 6.6 7.1 5.8 5.0 5.4 5.7 5.3 5.5 8.1 6.2 7.2 9 7.8 6.6 7.3 5-3 4.9 5.1 —— —— —— 8.4 6.9 7.4 10 8.2 7.2 7.6 5.1 4.5 4.7 5.4 4.4 4.9 8.2 6.8 7.11 11 8.4 7.2 7.8 4.7 4.1 4.6 5.6 4.2 4.8 8.9 6.7 7.6 12 8.5 7.5 8.0 4.3 2.6 3.3 5.2 4.3 4.7 7.5 7.0 7.2 13 8.6 7.4 8.0 8.2 2.6 4.9 5.4 4.5 4.7 7.0 6.3 6.7 14 8.2 7.6 7.8 8.1 6.8 7.4 5.5 4.5 5.0 6.8 5.7 6.3 15 8.2 7.4 7.7 7.4 6.7 6.9 —— —— —— 6.3 5.5 5.9 16 8.6 7.5 8.1 7.2 6.5 6.8 —— —— —— 7.1 5.8 6.5 17 8.2 7.7 8.0 7.0 6.5 6.7 5.8 4.3 5.0 8.2 6.4 7.1 18 8.2 7.4 7.7 7.0 6.2 6.6 5.4 4.3 4.8 8.3 6.4 7.1 19 7.9 7.1 7.5 7.3 6.1 6.6 5.8 4.3 4.9 7.4 6.1 6.7 20 7.8 7.1 7.4 7.5 6.5 6.9 4.9 4.1 4.5 7.3 6.3 6.7 21 7.6 6.9 7.2 8.0 6.5 7.3 5.2 3.9 4.5 9.1 5.7 7.0 22 8.8 6.6 7.5 8.7 7.1 7.9 4.5 3.3 3.9 9.1 6.3 7.5 23 8.5 7.5 8.0 8.7 7-3 8.0 —— — —— 9.8 7.3 8.1 24 8.3 7.9 8.1 8.5 7.4 7.9 —— —— — 8.5 7.5 7.9 25 8.4 7.5 7.9 8.2 7.5 7.9 8.2 5.1 6.2 9.4 6.6 7.7 26 8.4 7.4 7.9 7.7 6.9 7.3 5.7 4.8 5.3 8.9 7.0 7.7 27 9.0 7.7 8.2 7.9 6.9 7.4 5.5 4.5 5.0 8.9 7.2 7.8 28 8.6 7.6 8.1 7.5 5.7 6.6 5.7 5.0 5.6 9.0 7.8 8.2 29 8.2 7.5 7.8 6.1 5.2 5.6 5.8 5.4 6.1 9.7 8.8 9.1 30 8.1 7.2 7.6 5.8 4.9 5.3 7.1 5.7 6.4 9.9 8.6 9.2 31 —— —— —— 5.8 4.9 5.3 6.6 6.2 6.3 MONTH 9.0 6.6 7.7 8.8 2.6 6.5 9-9 5.5 7.3 251 VERMILLION RIVER BASIN 05315000 VERMILLION RIVER NEAR EMPIRE, MN LOCATION.—Lat 44°40'00", long 93°03'17", in SWJNWJ sec.24, T.114 N., R.19 W., Dakota County, Hydrologic Unit 07040001, on right bank and just downstream from County Road 79, 2 mi (3.2 km) west of Empire and 4 mi (6.4 km) northeast of Parmington. DRAINAGE AREA.—110 mi 2 (285 km 2 ). WATER-DISCHARGE RECORDS PERIOD OP RECORD.—May 1942 to June 1945 (no record during July, August, and September 1944), September 1969 to September 1973 (discharge measurements only), October 1973 to current year. Prior to October 1975 published as "near Empire City". GAGE.—Water-stage recorder. Datum of gage is 851.99 ft (259-687 m) National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). April 12, 1942, to June 30, 1944, and October 1, 1944, to July 7, 1945, nonrecording gage at same site and present datum. REMARKS.—Records good except those for winter period, which are fair. Some regulation at low flow by sewage plant upstream. AVERAGE DISCHARGE.—10 years (water years 1943, 1974-82), 43.6 ft3/s (1.235 m3/s), 5-38 in/yr (137 mm/yr), 31,590 acre-ft/yr (39.0 hm3/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 2,030 ft 3 /s (57-5 m3/s) Sept. 18, 1942; maximum gage height, 7.16 ft (2.182 m) Mar. 20, 1980; minimum daily discharge, 8.4 ft3/ s (0.24 nP/s) Jan. 15, 1975; minimum gage height, 1.63 ft (0.497 m) Oct. 14, 1976. EXTREMES OUTSIDE PERIOD OP RECORD.—Flood in April 1965, reached a stage of 7-5 ft (2.286 m) from information by local resident, discharge 6,200 ft3/s (176 m3/s) from rating extended above 2,100 ft3/s (59-5 m3/s). EXTREMES FOR CURRENT YEAR.—Peak discharge above base of 200 ft3/s (5.66 m3/s) and maximum (*):

Discharge Gage height Discharge Gage height Date Time (ft3/(ftVs)s ) (m3/(mVs)s ) (ft) (m) Date Time (ft3/ s ) (m3/s) (ft) (m) Mar. 25 1030 *523 14.8 *6.47 1.972 Mar. 31 1200 294 5.67 1.728 Minimum discharge, 18 ft3/s (0.51 m3/ s ) Aug. 11, gage height 2.01 ft (0.613 m). DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 30 30 30 21 23 24 268 57 75 35 24 57 2 30 30 30 22 23 24 220 56 68 35 . 24 77 3 30 30 29 22 23 24 183 55 62 34 23 62 4 35 30 28 22 23 24 139 55 59 32 23 47 5 34 30 27 22 23 24 127 62 56 31 22 43 6 35 31 29 22 23 24 104 62 54 33 23 40 7 34 31 29 22 23 24 100 64 53 32 21 38 8 33 31 28 22 23 24 93 60 51 30 21 36 9 33 30 28 22 23 24 88 65 50 31 21 35 10 33 31 27 23 23 24 85 67 48 31 21 36 11 32 30 27 23 23 25 82 62 47 31 20 35 12 32 31 27 23 23 28 84 61 46 30 20 34 13 33 30 27 23 23 31 85 99 43 28 22 40 14 35 29 28 23 23 33 82 110 44 28 23 39 15 35 29 26 23 23 34 81 105 45 28 22 40 16 34 30 25 23 24 36 91 103 43 31 22 39 17 37 28 24 23 25 38 108 96 45 29 25 37 18 40 29 24 23 26 53 106 105 44 26 23 35 19 39 32 23 23 27 80 98 106 42 26 23 33 20 38 31 22 23 28 78 98 96 42 26 21 32 21 36 30 21 23 28 92 97 84 41 31 20 31 22 34 30 21 23 30 109 91 81 40 37 23 30 23 34 31 21 23 27 147 85 77 39 32 22 29 24 34 28 21 23 25 245 79 74 42 30 35 29 25 34 28 21 23 24 425 74 70 46 30 41 28 26 33 30 21 23 24 325 70 68 42 30 30 28 27 33 30 21 23 24 226 66 70 39 29 34 28 28 33 30 21 23 24 175 63 67 38 27 29 28 29 32 29 21 23 —— 184 61 65 37 27 31 28 30 32 30 21 23 —— 222 59 71 36 26 33 28 31 31 —— 21 23 —— 277 78 —— 24 30 —— TOTAL 1048 899 769 703 681 3103 3067 2351 1417 930 772 1122 MEAN 33.8 30.0 24.8 22.7 24.3 100 102 75.8 47.2 30.0 24.9 37.4 MAX 40 32 30 23 30 425 268 110 75 37 41 77 MIN 30 28 21 21 23 24 59 55 36 24 20 28 CFSM .31 .27 • 2I .21 .22 .91 • 93 .69 .43 .27 .23 .34 IN. .35 • 30 .26 .24 .23 1.05 1.04 .80 .48 • 31 .26 .38 AC-FT 2080 1780 1530 1390 1350 6150 6080 4660 2810 1840 1530 2230

CAL YR 1981 TOTAL 12525 MEAN 34.3 MAX 107 MIN 21 CFSM • 31 IN 4.24 AC-PT 24840 WTR YR 1982 TOTAL 16862 MEAN 46.2 MAX 425 MIN 20 CFSM .42 IN 5.70 AC-PT 33450 2S2 J VERMILLIOM RIVER BASIN 05345000 VERMILLION RIVER NEAR EMPIRE, MN—Continued WATER-QUALITY RECORDS PERIOD OP RECORD.—Water years 1973 to current year. PERIOD OP DAILY RECORD.— SPECIFIC CONDUCTANCE: February 1974 to current year. pH: February 1974 to current year. WATER TEMPERATURES: February 1974 to current year. DISSOLVED OXYGEN: February 1974 to current year. INSTRUMENTATION.—Water quality monitor since February 1974. REMARKS.—Water is pumped to a monitor that is inside a heated shelter; water temperature during the winter may be affected. Extremes are for those years with 80 percent or more record. COOPERATION.—Water-quality monitor is operated by the Metropolitan Waste Control Commission, St. Paul, MN. EXTREMES FOR PERIOD OF DAILY RECORD.— SPECIFIC CONDUCTANCE (water years 1979-82): Maximum, 997 micromhos Jan. 7, 1982; minimum, 236 micromhos June 8, 1980. pH (water years 1979-82): Maximum, 9.3 units Nov. 11, 1978; minimum, 6.7 units Mar. 20, 1980. WATER TEMPERATURES (water years 1979-82): Maximum, 27.0°C Aug. 6, 1979; minimum 6.0°C many days during winter. DISSOLVED OXYGEN (water years 1979-82): Maximum, 14.6 mg/L Nov. 21, 1981;,minimum, 1.5 mg/L Nov. 14, 1979. EXTREMES FOR CURRENT YEAR.— SPECIFIC CONDUCTANCE: Maximum, 997 micromhos Jan. 7; minimum, 319 micromhos Sept. 2. pH: Maximum, 8.3 units several days in Nov., Dec., June, July, Aug.; minimum, 7.1 units Sept. 15, 16, 18, 21, 22. WATER TEMPERATURES: Maximum, 23.5°C Aug. 2, 3; minimum, 0.0°C several days during winter. DISSOLVED OXYGEN: Maximum, 14.6 mg/L Nov. 21; minimum, 4.9 mg/L Aug. 4.

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 891 799 851 965 837 893 768 662 716 958 809 898 2 891 794 849 934 834 891 820 664 746 937 812 846 3 918 804 855 905 828 879 783 668 737 952 842 888 4 888 722 829 886 825 872 791 688 744 957 875 916 5 882 771 832 876 785 831 871 714 766 945 865 916 6 858 767 816 882 788 837 867 674 766 '984 911 944 7 885 782 834 892 752 813 798 697 763 997 911 966 8 878 780 838 862 742 807 792 693 750 977 866 939 9 879 789 841 853 743 808 795 668 741 994 919 956 10 907 778 835 836 761 798 795 718 757 11 884 785 840 862 762 817 797 710 756 12 890 786 849 855 765 819 836 701 755 13 903 781 844 863 762 816 823 700 761 14 848 773 817 895 751 810 797 703 757 15 875 779 825 889 752 822 825 730 765 16 881 788 837 856 813 834 815 717 770 17 848 757 808 875 762 830 813 731 779 18 870 774 813 863 771 821 822 737 788 871 772 829 19 871 780 835 813 688 751 847 710 776 882 752 828 20 862 773 824 762 677 726 834 694 764 935 795 850 21 867 782 825 751 647 693 793 681 744 941 779 860 22 877 784 832 761 655 706 793 689 741 869 791 832 23 867 779 832 779 691 734 778 665 7^2 939 800 879 24 896 762 818 793 656 722 825 692 767 988 800 910 25 893 773 830 764 651 699 826 689 750 958 781 869 26 933 803 860 792 655 717 866 727 772 27 917 813 873 789 627 693 869 741 804 28 903 819 861 857 656 710 882 755 824 29 917 825 833 778 644 709 936 797 876 30 921 828 876 846 671 760 878 718 853 31 963 826 874 911 799 848 MONTH 963 722 838 965 627 787 936 662 770 253 VERMILLIOM RIVER BASIN 053^5000 VERMILLION RIVER NEAR EMPIRE, MM—Continued SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEG. C), rfATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX WIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY 1 —— —— —— 5 06 43^ 449 681 588 624 2 —— —— --- 499 464 477 673 630 651 3 —- —— —— 535 451 513 695 585 647 4 —— —— _.. 565 1425 545 712 617 649 5 —— —— —— 577 533 555 689 590 636 6 —— —- —— 609 476 578 656 588 619 7 —- —— —— 611 571 595 656 581 617 8 —— —— --- 628 584 614 642 591 615 9 —— —— —— 643 604 529 660 576 617 10 860 725 797 657 604 635 794 6l6 697 11 879 725 808 686 633 666 300 629 752 12 851 706 776 689 647 668 758 433 711 13 889 691 762 685 621 663 662 579 634 14 796 661 710 671 589 643 700 637 668 15 701 617 673 675 609 648 751 664 700 16 820 579 643 657 595 638 742 702 721 17 812 603 690 654 601 627 766 722 748 18 680 534 603 639 613 626 734 684 706 19 659 494 513 650 624 636 742 654 706 20 646 497 547 663 610 635 738 687 708 21 600 536 558 669 615 646 729 664 701 22 550 502 525 686 632 664 752 645 683 23 506 445 482 684 633 660 731 654 687 24 445 393 419 686 625 650 697 624 660 25 396 323 334 684 620 640 702 639 670 26 387 334 366 676 634 655 751 607 66l 27 485 387 422 677 624 650 705 606 646 28 510 449 478 671 613 645 703 6l6 656 29 502 327 485 692 607 631 705 644 673 30 469 387 450 660 598 624 707 571 650 31 —— —— —— —— —— —— 682 566 624 MONTH 692 425 6l4 800 433 669

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 680 590 631 824 692 773 821 711 767 798 387 570 2 700 625 660 777 569 727 844 718 775 442 319 377 3 702 626 667 769 661 718 815 680 774 591 415 499 4 686 585 664 822 708 765 796 669 735 690 507 587 5 697 610 649 838 693 755 820 678 752 675 544 613 6 781 698 737 779 658 752 779 686 733 743 553 613 7 831 675 753 767 620 702 774 589 668 762 631 710 8 807 710 761 824 646 723 736 608 663 757 642 704 9 812 722 760 830 742 781 746 537 642 8l4 653 739 10 854 706 785 781 652 717 841 625 722 817 689 761 11 836 747 788 745 668 710 788 596 748 886 716 783 12 —— —— —— 899 688 783 825 649 746 901 719 814 13 898 763 841 900 798 860 794 619 704 842 730 780 14 899 759 829 900 765 868 786 655 729 822 720 772 15 855 754 801 892 852 866 —— —— —— 804 673 755 16 848 753 798 898 799 860 787 609 688 829 706 775 17 817 738 775 —— —— —— 736 522 641 839 715 778 18 864 737 775 900 837 877 795 601 691 900 711 788 19 836 729 770 —— —— —— 778 601 688 891 713 807 20 818 710 765 961 833 915 790 653 713 871 705 811 21 782 690 736 956 603 853 815 612 709 855 695 784 22 —— —— —— 733 620 683 752 475 644 882 670 785 23 811 689 754 869 697 787 687 643 669 921 740 821 24 780 670 718 892 758 819 —— —— —— 911 733 828 25 801 593 699 863 734 802 —— —— —— 919 719 777 26 780 679 725 831 692 785 —— —— —— 915 742 810 27 826 715 758 838 715 777 —— —— —— 901 710 812 28 802 702 752 859 723 787 —— —— —— 845 728 795 29 786 706 749 869 730 804 —— —— —— 868 725 803 30 822 706 763 850 751 814 884 744 804 858 742 800 31 —— —— ——, 864 726 788 879 690 802 MONTH 921 319 735 VERMIU,EOM RIVER BASIN 05345000 VERMILLIOM RIVER NEAR EMPIRE, MN—Continued PIi (STANDARD UNITS), WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982

DAY MAX MIM MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

OCTOBER NOVEMBER DECEMBER JANUARY

8.2 8.1 8.2 8.2 8.1 8.1 8.2 8.1 8.1 7.9 7.8 7.9 8.2 8.2 8.2 8.2 8.1 3.1 8.3 8.1 8.2- 8.0 7.8 7.9 8.2 8.1 8.1 8.2 8.1 8.1 8.3 8.1 8.1 8.0 7.9 7.9 8.1 7.9 8.0 8.3 8.1 8.2 8.3 8.1 8.1 8.0 7.9 7.9 8.1 8.0 8.0 8.3 8.1 8.1 8.2 8.1 8.2 8.0 7.9 7.9 8.1 8.0 8.1 8.2 8.1 8.2 8.2 8.1 8.1 8.0 7.9 7.9 8.1 8.1 8.1 8.3 8.1 8.2 8.2 8.0 8.1 7.9 7.8 7.8 8.2 8.1 8.1 8.3 8.1 8.2 8.2 8.1 S.I 7.8 7.7 7.8 8.1 8.1 8.1 8.3 8.1 8.2 8.3 8.1 8.2 10 8.1 3.0 8.1 8.3 8.1 8.2 8.2 8.1 8.1 11 8.2 8.1 8.1 8.2 8.0 8.1 8.2 8.1 8.1 12 8.1 8.0 8.1 8.2 8.0 8.1 8.2 8.0 8.1 13 8.1 8.0 8.1 8.2 8.0 8.1 8.1 8.0 8.1 14 8.1 8.0 8.0 8.2 8.0 8.1 8.2 8.1 8.1 15 8.1 8.0 8.1 8.1 8.0 8.0 8.1 8.0 8.1 16 8.1 8.1 8.1 8.0 8.0 8.0 8.1 8.0 8.0 17 8.1 8.0 8.0 8.2 8.0 8.1 8.1 8.0 8.0 18 8.2 8.0 8.1 8.1 8.0 8.1 8.0 7.9 8.0 8.0 7.9 8.0 19 8.1 8.1 8.1 8.2 8.0 8.1 8.0 7.9 7.9 7.9 7.9 7.9 20 8.1 8.0 8.1 8.3 8.1 8.2 8.0 7.9 7.9 7.9 7.8 7.9 21 8.2 8.1 8.1 8.3 8.1 8.2 8.0 7.9 7.9 7.9 7.9 7.9 22 8.2 8.1 8.1 8.2 8.1 8.1 8.1 7.9 8.0 7.9 7.8 7.9 23 8.2 8.1 8.1 8.2 8.1 8.1 8.1 8.0 8.0 7.9 7.7 7.8 24 8.2 8.1 8.1 8.2 8.0 8.1 8.1 8.0 8.0 7.8 7.7 7.7 25 8.2 8.0 8.1 8.2 8.0 8.1 8.1 8.0 8.0 7.8 7.6 7.7 26 8.1 8.0 8.1 8.2 8.0 8.1 8.1 8.0 8.0 27 8.2 8.0 8.1 8.2 8.1 8.1 8.1 8.0 8.0 28 8.2 8.0 8.1 8.2 8.1 8.1 8.1 8.0 8.0 29 8.2 8.0 8.1 8.3 8.1 8.1 8.0 7-9 7.9 30 8.2 8.1 8.1 8.2 8.1 8.1 8.0 7.8 7.9 31 8.2 8.1 8.1 8.0 7.8 7.9 MONTH 8.2 7.9 8.1 8.0 8.1 8.3 7.8 8.0

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

FEBRUARY MARCH APRIL MAY 7.6 7.6 7.6 8.0 7.8 7.9 7.8 7-8 7.8 7.6 7.6 7.6 8.1 7.8 7.9 7.8 7.8 7.8 7.9 7.6 7.8 8.1 7.9 8.0 7.9 7.8 7.8 7.8 7.6 7.7 8.0 7.9 7.9 7.8 7.8 7.8 7.7 7.7 7.7 8.0 7.8 7.9 7.8 7.5 7.7 7.3 7.6 7.7 8.0 7.8 7.9 7.9 7.7 7.7 7.8 7.7 7.8 8.0 7.9 7.9 7.8 7.8 7.8 8.1 7.9 7.9 7.8 7.8 7.8 8.0 7.9 7.9 10 7.9 7.8 7.8 7.8 8.1 7.9 8.0 11 7.9 7.8 7.9 7.8 7.8 7.8 8.0 7.9 8.0 12 8.0 7.8 7.9 7.8 7.8 7.8 8.0 7.9 8.0 13 7.9 7.8 7.9 7.9 7.8 7.8 7.9 7.8 7-9 14 7.9 7.8 7.8 7.9 7.8 7.9 7.9 7.8 7.8 15 7.8 7.8 7.8 7.9 7.9 7.9 8.0 7.8 7.9 16 7.9 7.8 7.8 7.9 7.8 7-8 8.0 7.8 7.9 17 7.8 7.7 7.7 8.0 7.8 7.9 8.0 7.9 7.9 18 7.8 7.7 7.7 7.9 7-8 7.9 8.0 7.9 7.9 19 7.8 7.6 7.6 8.0 7.8 7.9 8.1 7.9 8.0 20 7.8 7.6 7.7 8.0 7.8 7.9 8.1 7.9 8.0 21 7.7 7.6 7.6 8.0 7.8 7.9 8.1 7.9 8.0 22 7.6 7.5 7.5 8.0 7.8 7.9 8.0 7.8 7.9 23 7.5 7.4 7.4 8.0 7.9 7.9 7-8 7.8 7.8 24 7.4 7.4 7.4 8.0 7.9 8.0 7.8 7.8 7.8 25 7.4 7.3 7.4 8.0 7.9 7.9 7.8 7.8 7.8 26 7.5 7.4 7.4 8.0 7.9 7.9 7.8 7.8 7.8 27 7.6 7.4 7.5 8.0 7.9 7.9 7.8 7.8 7.8 28 7.6 7.6 7.6 8.0 7.8 7.9 7.8 7.7 7.8 29 7.6 7.3 7.6 8.0 7.8 7.9 7.8 7.7 7.8 30 7.6 7.5 7.6 8.0 7.9 7.9 7.8 7.8 7.8 31 8.0 7.8 7.9 MONTH 7.6 J.I 7.7 7.9 255 VERMILLION RIVER BASIN

05345000 VERMILLION RIVER NEAR EMPIRE, MN—Continued PH (STANDARD UNITS), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULf SEPTEMBER 8.0 7.9 7.9 8.3 8.1 8.2 8.2 8.1 8.1 8.1 7.9 8.0 8.3 8.2 8.2 8.2 8.1 8.2 8.0 7.9 8.0 8.2 8.1 8.1 8.2 8.1 8.2 7.9 7.9 7.9. 8.1 8.0 8.0 8.2 8.1 8.1 8.0 7.9 7.9 8.0 7.8 7-8 8.1 7.9 8.0 6 8.0 7.9 8.0 8.2 7-7 8.0 8.0 7.9 7-9 7 8.0 7.9 8.0 8.2 8.2 8.2 7.9 7.8 7.8 8 8.0 7.9 7.9 8.2 8.1 8.2 7.9 7.8 7.8 7.9 7.5 7.7 9 8.0 7.9 7.9 8.2 8.0 8.1 7.8 7.7 7.7 8.0 7.7 7.9 10 8.0 7.9 8.0 8.0 7-9 8.0 7.8 7.6 7-7 8.1 7.9 8.0 11 8.0 7.9 8.0 7.9 7.9 7.9 7.9 7.6 7.8 8.2 7.9 8.0 12 8.0 7.9 8.0 7.9 7.7 7.8 8.0 7.8 7.9 8.2 7.9 8.0 13 8.0 7.9 7.9 8.0 7.6 7.8 8.0 7.8 7.9 7.9 7.5 7. .6 14 7.9 7.9 7.9 8.0 7.9 8.0 7.9 7-9 7.9 7-5 7.3 7.4 15 7.9 7.8 7.8 8.0 7.9 8.0 8.2 8.0 8.1 7.3 7.1 7-2 16 8.0 7.7 7.9 8.0 7.9 7-9 8.3 8.1 8.2 7.4 7.1 7.3 17 8.0 7.9 7.9 7.9 7.8 7.9 8.2 7.9 8.1 7.8 7.2 7.4 18 8.0 7.9 8.0 7-9 7.8 7.9 8.2 8.0 8.1 7.6 7.1 7. .4 19 8.1 7.9 8.0 8.2 7-9 8.2 8.2 8.1 8.1 7.5 7.2 7. .3 20 8.1 8.0 8.0 8.2 8.1 8.1 8.2 8.1 8.2 7.6 7.2 7.4 21 8.1 8.0 8.0 8.2 7.9 8.1 8.2 8.0 8.1 7.7 7.1 7.4 22 8.2 8.0 8.1 8.0 7-9 7.9 8.1 7.9 8.0 7.7 7.1 7.4 23 8.2 8.0 8.1 8.1 7.9 8.0 7.9 7.8 7.9 7.8 7.4 7.6 24 8.1 8.0 8.1 8.1 8.0 8.0 7.7 7.4 7.6 25 8.1 8.0 8.1 8.1 8.0 8.0 7.7 7.2 7.4 26 8.1 8.0 8.1 8.1 8.0 8.0 7.7 7.2 7.4 27 8.1 8.0 8.1 8.1 8.0 8.0 7.8 7-3 7.5 28 8.2 8.0 8.1 8.2 8.0 8.1 7.8 7.5 7.6 29 8.2 8.1 8.2 8.2 8.1 8.1 7.9 7.7 7.7 30 8.3 8.1 8.2 8.2 8.1 8.1 7-8 7.5 7.7 31 8.2 8.1 8.1 MONTH 8.3 7.7 8.0 8.3 7-6 8.0 TEMPERATURE WATER (DEG. C), WATER YEAR OCTOBER 198 1 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 12.5 10.0 11.0 9.5 7.5 8.5 4.5 3-5 4.0 0 .0 .0 2 11.5 8.0 10.0 9.5 6.5 8.0 4.5 4.0 4.0 5 .0 .0 3 10.0 9.0 9.5 10.5 8.0 9.0 4.0 3.0 3.5 5 .0 .0 4 11.5 9.5 10.5 11.5 9.5 10.5 4.0 2.5 3.0 5 .0 .5 5 11.5 11.5 11.5 11.0 8.0 10.0 3.0 2.0 2.5 0 .0 .5 6 12.5 10.5 11.5 9.0 7-0 8.0 5.0 3.0 4.0 0 .0 ..0 7 12.5 9.0 10.5 9.0 6.5 7.5 5-5 4.5 5.0 0 .0 .0 8 12.5 9.5 10.5 8.5 6.5 7.5 4.5 4.0 4.0 ,0 .0 .0 9 10.5 10.0 10.5 6.5 5.0 5.5 4.0 3.0 4.0 ,0 .0 .0 10 12.0 10.5 11.0 7.5 4.5 6.0 2.5 1.0 1.5 11 12.5 9.5 11.0 8.0 6.0 7.0 3.5 2.0 3.0 12 12.5 11.0 12.0 8.0 6.0 7.0 4.5 3.5 4.0 13 13.0 12.0 12.5 9.5 7.0 8.0 4.5 4.0 4.5 14 13-5 12.5 13.0 10.5 8.5 9.0 4.5 .0 2.9 15 13.0 11.0 12.0 10.0 9.5 10.0 1.0 .0 .5 16 12.5 9.5 11.0 10.0 8.5 9.5 1.0 1.0 1.0 17 12.0 11.5 11.5 8.5 7-0 8.0 1.0 1.0 1.0 18 11.0 8.5 9.5 8.0 6.5 7.5 1.0 1.0 1.0 19 10.0 7.0 8.5 6.5 5-5 6.0 1.0 1.0 1.0 .0 .0 20 10.5 9.0 9.5 5.5 4.0 5.0 1.0 1.0 1.0 .0 .0 21 9.5 8.5 9.0 3.5 2.5 3.0 2.0 .5 1.0 .0 .0 22 8.0 6.5 7.5 4.0 2.5 3.0 2.0 1.0 1.5 .0 .0 23 6.5 5.5 6.0 6.0 3.5 4.0 1.5 .5 1.0 .0 .0 24 5.5 4.5 5.0 5.5 5.0 5.5 2.0 .0 1.0 .0 .0 25 7.5 5.5 6.5 6.0 5.5 6.0 2.0 1.0 1.5 .0 .0 26 7.5 5.0 6.5 6.0 5.5 6.0 3.0 1.5 2.0 .0 .0 27 9.0 6.5 7.5 5.5 4.5 4.5 3.0 2.0 2.5 .0 .0 28 9.5 7.5 8.5 5.0 4.5 4.5 2.0 .0 1.0 29 10.5 8.5 9.5 5.5 4.5 5.0 .0 .0 .0 30 11.5 9.5 10.5 5.0 3.5 4.5 .5 .0 .0 31 11.5 9.5 10.5 1.5 .0 1.0 MONTH 13.5 4.5 10.0 11.5 2.5 7.0 5.5 .0 2.0 VERMILLION RIVSR BASIN 05345000 VERMILLION RIVER NEAR EMPIRE, MN—Continued TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

FEBRUARY MARCH APRIL MAY

1 6.0 4.0 5.0 14.0 8.5 11.0 2 0 .5 .5 6.5 4.5 5.0 15.0 10.0 12.0 3 5 .5 .5 7.0 1.0 4.0 15.0 9.5 13.0 4 5 .5 .5 '4.0 .5 2.0 17.0 12.5 14.0 5 5 .5 .5 3.0 1.0 2.0 14.5 9.0 12.5

6 5 .5 .5 5.5 1.0 2.5 15.0 9.0 9.5 7 5 .5 .5 4.5 2.5 3.5 13.0 8.0 10.0 8 5 .0 .5 4.0 3.0 3.5 14.0 9.5 11.0 9 5 .0 .0 5.0 3.0 4.0 14.5 10.5 12.5 10 0 .0 .0 3.5 1.0 5.0 4.0 4.5, 17.5 12.0 14.5 11 .5 .0 .0 6.5 2.5 4.5 7.5 3.0 5.0 17.0 12.0 15.0 12 4.5 3.0 3-5 7.5 5.0 6.0 14.5 10.0 12.5 13 6.5 2.0 3-5 10.0 6.0 7.5 14.5 11.0 13.0 14 6.0 2.5 4.5 10.0 5.0 8.5 16.5 14.0 15'. 0 15 5.0 4.0 4.5 10.0 8.0 9.0 16.5 13.5 15.5 16 5.0 2.5 4.0 11.5 5.5 10.0 17.5 12.0 15.5 17 7-5 3.5 5.0 10.5 7.5 9.5 16.5 15.0 15.5 18 5.5 3.0 4.5 9.5 7.5 8.5 17.0 14.0 15.5 19 4.5 1.0 2.0 9.0 5.5 7.5 18.0 14.0 16.0 20 '1.0 1.0 2.0 8.0 4.0 6.0 16.5 14.5 15.5 21 4.0 1.5 2.5 10.0 5.5 7.5 14.5 12.0 13.0 22 3.5 1.0 2.5 11.0 6.5 8.5 13.0 11.5 12.0 23 3.0 • 1.5 2.0 12.5 7.5 10.0 15.5 10.5 12.5 24 2.0 1.0 1.5 14.0 9.0 11.5 16.5 12.0 13.0 25 1.5 .5 .5 13-5 6.5 12.0 14.5 12.5 13.5 • 26 2.5 .5 1.0 12.5 9.5 11.0 13-5 12.5 13.0 27 3.0 .5 1.5 12.5 8.5 10.5 14.5 12.0 13.0 28 4.5 1.0 3.0 12.5 9-0 10.5 17.0 13.0 14.0 29 4.0 .5 3-5 12.5 8.5 10.5 16.5 13.0 15.5 30 5.5 1.0 5-0 11.0 9.0 10.0 17.5 13-5 16.0 31 17.0 13.0 16.0 MONTH 14.0 .5 7.0 18.0 8.0 13.5

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN

JUNE JULY AUGUST SEPTEMBER

1 16.0 13.0 14.5 19.0 13.5 16.0 22.0 17.0 19-0 18.0 15.0 16.5 2 15.5 12.0 13.5 17.5 14.5 16.0 23.5 17-0 20.0 17.5 16.0 17.0 3 15.5 11.5 13.5 21.0 15.0 17.0 23.5 19.5 21.0 17.0 14.5 16.0 4 16.0 11.5 14.0 21.5 13.5 18.5 22.5 18.5 20.5 17.5 14.0 16.0 5 16.0 12.0 13.5 23.0 17.0 20.0 22.5 18.0 20.0 17.0 16.0 16.5

6 14.5 12.5 13.5 21.5 13.5 17.5 22.0 18.0 19.5; 16.5 14.0 15.5 7 17.0 12.0 14.5 21.0 16.5 18.0 22.5 17.0 19.5 15.0 14.5 14.5 8 17.0 13.0 15.0 20.5 15.0 17-5 20.5 16.5 18.5 16.5 14.0 15.0 9 15.5 14.0 14.5 20.0 16.5 18.0 17.0 14.5 15.5 18.0 15.5 16.5 10 16.0 11.0 13.5 17.5 15.0 16.5 18.5 12.5 15.0 18.5 17-0 17.5 11 16.0 12.0 14.0 20.0 14.0 16.0 19.5 14.5 16.5 20.0 16.5 18.0 12 17.0 12.0 14.5 21.0 15.5 18.0 18.5 13.5 16.0 19.0 17.5 18.0 13 17-5 12.5 14.5 21.5 16.0 18.5 17.0 15.5 16.0 17.5 14.5 15.5 14 15.5 11.0 14.0 22.0 16.0 19.0 16.0 15.0 15.5 14.5 13-0 13.5 15 16.0 12.5 14.0 19.0 17.0 18.0 19-5 15.0 17.0 13.0 12.0 12.5 16 17.0 12.0 14.5 21.5 17.0 19.0 20.0 17.0 18.5 13.0 12.0 12.5 17 17.5 13.0 15.0 22.5 19.0 20.5 21.5 16.5 19.0 15.0 12.5 13.5 18 15.0 13.0 14.0 22.5 16.5 19.5 22.0 17.0 19.5 15.0 12.0 13.5 19 15.0 11.5 13.5 21.5 16.0 18.0 22.0 18.0 19.5 14.0 12.5 13.0 20 15-0 12.0 13.0 22.5 17.0 19.5 21.0 17.0 19.0 13.0 11.5 12.0 21 17.0 12.0 14.0 19.5 17.5 18.5 21.0 15.5 18.0 13.5 10.0 11.5 22 21.5 17.0 19.0 20.5 17.0 18.51 14.0 10.5 12.0 23 18.0 13.5 16.0 22.0 17.5 20.0 20.0 16.0 18.0' 15.5 12.5 13.5 24 16.5 15.0 15.5 21.0 18.0 19.5 17.5 15.5 16.5 14.5 12.5 13.5 25 18.5 14.0 15.0 21.0 18.5 19.5 18.5 14.5 16.5 14.0 10.5 12.0 26 17-5 14.5 16.0 19.0 18.0 18.5 18.0 15.5 17.0 14.0 10.5 12.0 27 20.0 14.5 17.5 21.0 17.0 18.5 17.5 14.5 16.0 14.0 11.0 12.5 28 20.0 15.5 18.0 21.5 17.0 19.0 17.0 14.0 15.0 16.0 12.5 13.5 29 18.0 15.5 16.5 21.5 17.0 19.0 15.5 14.5 15.0 16.5 14.5 15.0 30 18.0 13.5 16.0 20.5 16.5 18.5 18.0 14.0 15.5 15.5 14.0 15.0 31 21.0 16.0 18.5 16.5 15.0 15.5 MONTH 23.0 13.5 18.5 23.5 12.5 17.5 20.0 10.0 14.5 257 VERMILLION RIVER BASIN 05345000 VERMILLION RIVER NEAR EMPIRE, MN—Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN OCTOBER NOVEMBER DECEMBER JANUARY 1 10.5 8.6 9.6 12.0 9.5 10.8 13.6 10.8 11.8 12.8 11.4 11.9 2 10.6 9.4 10.0 12.3 10.5 11.2 13.3 10.6 11.7 13.4 13.5 12.1 3 10.2 9.1 9.7 12.1 10.1 10.9 13.9 11.0 12.0 13.6 12.1 12.9 4 9.8 8.8 9.4 11.7 9.5 10.3 13.9 11.2 12.2 13.3 11.5 12.9 5 9.9 8.5 9.1 11.8 9.1 10.1 14.5 11.7 12.6 13.1 11.9 12.5 6 10.3 8.6 9.4 11.4 9.8 10.6 13.7 11.3 12.2 13.2 11.9 12.6 7 10.8 9.1 9-9 11.5 9.5 10.3 12.8 10.3 11.3 12.6 11.5 12.0 8 10.6 9.1 9.7 11.6 8.8 10.0 13.4 11.0 12.0 12.7 11.0 11.7 9 10.4 9.0 9.7 12.5 10.0 11.0 14.0 11.2 12.3 12.5 11.2 11.7 10 10.0 8.7 9.2 12.7 10.0 11.0 14.2 11.7 12.8 11 10.1 8.7 9.4 12.6 10.2 11.0 13.8 11.2 12.3 12 10.0 8.4 9.0 12.5 10.0 11.0 12.8 10.4 11.5 13 9.0 7.7 8.4 12.4 9.6 10.6 12.7 10.5 11.3 14 8.4 7.1 7.6 12.3 9-4 10.4 13.8 10.6 12.2 15 10.3 7.0 8.8 11.1 9-2 10.0 13.8 11.4 12.6 16 10.5 9.1 9.7 12.7 9-5 11.1 13.8 11.6 12.6 17 9.1 8.0 8.6 12.9 9.5 10.9 13.5 11.9 12.7 18 11.3 8.0 9.7 12.1 9.9 10.8 13.1 11.7 12.5 13.3 11.5 12.3 19 11.3 10.0 10.6 14.1 10.4 11.9 13.2 11.4 12.1 12.3 11.2 11.6 20 10.9 9.4 10.0 14.0 11.1 12.4 12.9 11.4 11.9 12.7 11.3 12.1 21 11.1 9.5 10.2 14.6 11.8 13.0 13.1 10.8 12.0 12.6 11.9 12.2 22 11.9 9.8 10.8 14.5 11.8 12.9 13.3 11.6 12.3 12.4 11.5 12.1 23 12.2 10.7 11.5 13.1 11.3 12.1 13.1 11.3 12.4 12.1 10.8 11.4 24 12.2 10.5 11.2 13.2 10.9 11.8 12.8 11.2 11.8 11.6 10.4 11.0 25 11.3 10.1 10.6 12.6 10.3 11.2 12.3 10.0 10.2 11.0 10.1 10.5 26 11.6 9.8 10.6 12.3 9.8 10.9 12.5 10.1 10.9 27 11.0 9.6 10.3 13.7 10.4 11.9 14.5 10.6 11.3 28 11.1 9.4 10.1 13.6 11.0 12.1 13.3 11.3 12.3 29 12.9 8.9 10.2 13.8 11.0 12.1 13.0 11.5 12.2 30 10.6 8.9 9.7 13.4 10.9 11.7 12.4 11.5 11.9 31 11.0 8.9 9.8 12.4 10.7 11.4 MONTH 12.9 7.0 9.8 14.6 11.2 14.5 10.0 12.0

DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN FEBRUARY MARCH APRIL MAY

9.7 8.7 9.1 10.4 8.2 9.0 9.2 8.9 9.1 10.0 8.3 9.1 10.5 8.2 9.7 10.6 8.2 9.4 10.5 9.5 10.0 8.9 7.7 8.2 11.1 9.7 10.5 10.2 5.9 7.9 '9.1 10.8 10.6 11.3 7.7 9.9 10.7 9.3 10.1 11.6 9.3 10.3 9.7 9.3 9.5 10.7 8.3 9.4 9 9.6 9.0 9.4 11.0 8.7 9.7 10 10.5 10.1 10.0 8.9 9.2 10.4 7.6 8.9 11 9.9 9.4 9.7 9.9 8.8 9.5 11.5 6.7 7.9 12 10.0 9.2 9.5 9.2 8.6 8.9 13 9.9 9.3 9.6 8.8 7.7 8.5 10.3 7.2 7.9 14 9.9 9.1 9.3 9.4 7.2 7.4 8.2 6.5 7.2 15 9.3 8.8 9.1 8.5 7.8 8.1 8.7 6.2 7.3 16 9.4 8.9 9.1 8.8 7.1 7.5 9.6 7.3 8.0 17 9.0 8.4 8.8 9.5 7-0 8.0 8.5 7.1 7.7 18 9.8 8.7 9.4 9.5 8.2 8.8 7.0 7.7 19 10.3 9.0 10.1 10.4 7.9 9.3 8.2!H 6.7 7.3 20 10.6 9.0 10.3 11.5 10.0 10.7 7.9 6.5 7.2 21 10.6 10.3 10.5 11.6 7.3 10.6 8.3 7.2 7.8 22 10.3 6.9 8.8 11.1 9.8 10.4 9.3 7.5 8.0 23 8.3 6.0 7.1 10.8 8.7 9-7 9.4 6.8 8.9 24 6.9 6.1 6.5 10.1 8.2 8.9 8.5 6.6 8.2 25 10.5 6.1 10.0 10.5 8.3 8.9 8.0 7.3 7.7 26 10.7 10.1 10.4 10.5 8.6 9.8 8.5 7.2 7.6 27 10.7 8.3 10.3 10.3 9.1 9.6 8.5 7.8 8.1 28 10.5 9.7 10.1 9.5 7.5 8.1 8.2 7.6 7.9 29 10.1 9.5 9.7 9.4 8.1 8.7 7.5 6.8 7.1 30 10.2 9.0 9.2 9.6 7.8 8.4 7.8 6.3 7.3 31 8.0 6.9 7.5 MONTH 11.6 7.0 9.2 258 VERMILJj CON RIVER BASIM 05345000 VERMILLION RIVER NEAR EMPIRE, MN--Continued OXYGEN, DISSOLVED (DO), MG/L, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DAY MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN MAX MIN MEAN JUNE JULY AUGUST SEPTEMBER 1 8.3 7.6 8.0 7.5 6.1 6.7 7.6 6.3 7.1 7.6 6.9 7.2 2 8.4 7.1 7.7 10.3 6.3 8.0 7.4 5.4 6.4 7.8 7.0 7.5 3 8.7 7.6 8.1 8.7 6.2 8.1 6.3 5.0 5.7 8.2 7.5 7-9 4 8.4 7.0 8.0 8.6 6.9 8.0 6.7 4.9 5.5 8.2 7.5 7.9 5 8.2 7.4 7.8 7.8 6.6 7.3 6.3 5.1 5.7 8.5 7.8 8.2 6 8.0 7.3 7.6 8.4 6.7 7.5 6.2 5.1 5.5 9.1 8.3 8.8 7 8.4 7.4 7.8 7.8 6.7 7.3 6.9 5.0 5.6 9.0 8.4 8.7 8 8.5 7.3 7.8 8.3 6.7 7.3 7.3 5.7 6.6 8.7 8.3 8.5 9 8.1 7.0 7.6 7.9 6.8 7.2 8.6 6.5 7-5 7.8 6.6 7.4 10 8.9 7.7 8.3 8.3 6.1 7.0 8.8 7.5 8.2 6.8 6.1 6.5 11 8.6 7.4 8.1 8.8 7.8 8.3 8.3 6.9 7.7 7.0 5.6 6.1 12 —— —— —— 8.1 7.0 7.6 8.8 6.9 7-9 7.2 6.6 6.9 13 8.5 7.4 8.0 7.9 6.5 7.3 8.2 6.8 7-3 8.0 6.5 7.3 14 .8.8 7.2 7.6 7.2 5.9 6.7 7.4 7.1 7.3 8.3 7.7 7.9 15 8.3 7.4 7.9 8.4 5.8 7.0 —— —— —— 8.8 7.8 8.2 16 8.6 7.7 8.2 7.7 6.5 7.3 8.4 7.7 8.0 8.9 8.2 8.6 17 8.5 7.6 7.9 7-7 5.9 6.5 7.5 6.2 6.8 8.4 7-4 8.1 18 9.1 7.5 8.5 8.0 6.9 7-7 7.3 5-9 6.5 8.5 7-7 8.0 19 9.2 8.2 8.8 8.1 7.2 7.6 7-1 5.9 6.5 8.6 7.8 8.2 20 9.8 8.3 9.2" 7-7 6.6 7.2 7.0 6.0 6.5 8.9 8.0 8.4 21 '8.9 8.5 8.7 7.1 5.7 6.3 7.3 6.1 6.7 8.8 7.8 8.4 22 —— —— —— 8.3 5.8 7.1 7.1 6.1 6.6 8.8 7.4 8.0 23 7.5 6.5 7.1 7.7 7.0 7-3 7-8 6.4 6.5 8.5 7.8 8.2 24 7.3 6.0 6.7 7.7 6.1 6.6 7.8 6.9 7.3 8.6 7.5 7-9 25 9.0 6.3 6.8 7-9 7-4 7.6 7.7 7.3 7.5 8.7 7-9 8.2 26 7.1 5.2 6.0 8.2 7.2 7-7 7-9 7.2 7.5 9.4 7-8 8.6 27 7.9 5.7 6.9 8.1 7-3 7-7 8.5 7.1 7.8 9-6 8.2 8.9 28 7.2 6.2 6.6 7-6 6.7 7.2 8.7 7.8 8.2 8.8 7-9 8.5 29 8.0 5.9 6.9 7.3 6.3 6.8 8.8 7.8 8.3 7.9 7.0 7.5 30 7.8 5.4 7.2 6.5 5.8 6.2 8.4 7.2 7.9 8.9 6.4 7.8 31 —— —— —— : 8.0 5.5 6.0 7.9 6.6 7.2 MONTH 10.3 5-5 7.2 , 9.6 5-6 7-9 259 CANNON RIVER BASIN 05353800 STRAIGHT RIVER NEAR PARIBAULT, MN LOCATION.—Lat 44°15'29", long 93°13'51", in W^SEJ sec.9, T.109 N., R.20 W., Rice County, Hydrologic Unit 070400Q2, on right bank 15 ft (5 m) downstream from highway bridge, 2.8 mi (4.5 km) upstream from Palls Creek and 3.2 mi (5.1 km) southeast of Paribault. DRAINAGE AREA.—442 mi 2 (1,145 km2 ). PERIOD OP RECORD.—October 1965 to current year. GAGE.—Water-stage recorder. Datum of gage is 1,034.58 ft (315.340 m) National Geodetic Vertical Datum of 1929. REMARKS.--Records good except those for winter period, which are fair. AVERAGE DISCHARGE.--17 years, 237 ftVs (6.712 ra 3 /s), 7-28 in/yr (185 mm/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 5,990 ft 3 /s (170 m3 /s) May 1, 1973, gage height, 11.20 ft (3.414 m); maximum gage height, 12.74 ft (3.883 m) Mar. 5, 1974 (backwater from ice); minimum discharge, 10 ft^/s (0.28 m3 /s) Oct. 27, 1976; minimum gage height, 3.66 ft (1.116 m) Nov. 27, 1976. EXTREMES POR CURRENT YEAR.—Peak discharge above base of 1,500 ft 3 /s (42.5 m 3 /s) and maximum (*):

Discharge Gage height Discharge Gage height Date Time (ft3 /s) (r (ft) (m) Date Time (ft3 /s) (m3 /s) (ft) (ra) Mar. 19 2000 1730 49.0 7.29 2.222 May 31 1030 *3130 i.6 *9.02 2.7*9 Minimum daily discharge, 40 ft 3 /s (1.13 m 3 /s) Jan. 18 to Peb. 14; minimum gage height, 3.91 ft (1.192 m) Aug. 21, 22.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 121 205 134 67 40 69 905 267 2020 178 79 470 2 109 197 133 64 40 68 749 249 1520 166 77 553 3 107 193 132 62 40 68 709 238 1070 166 75 470 4 144 190 130 59 40 67 569 249 784 157 73 322 5 155 189 128 57 40 66 528 466 632 140 75 227 6 182 187 130 55 40 66 456 654 538 143 73 189 7 191 183 130 52 40 66 433 874 494 238 69 171 8 191 174 120 50 40 66 393 862 442 456 67 154 9 178 200 110 48 40 67 388 737 406 325 63 140 10 173 203 109 47 40 70 363 611 371 256 61 152 11 164 193 111 45 40 100 346 499 338 306 59 145 12 154 181 112 44 40 150 406 489 313 282 55 202 13 152 175 113 43 40 300 494 814 286 221 55 555 14 180 169 114 42 40 600 523 1020 264 198 53 636 15 198 163 114 42 42 800 554 1010 275 201 51 652 16 210 158 113 41 43 900 664 975 271 302 49 600 17 306 151 112 41 45 1200 1100 975 275 451 49 530 18 436 143 111 40 48 1400 1160 1260 294 380 48 438 19 456 155 108 40 53 1640 988 1100 298 275 48 352 20 417 151 105 40 56 1580 874 950 275 217 46 283 21 361 125 100 40 62 1440 737 760 260 194 42 235 22 319 127 97 40 66 1220 621 714 242 182 69 205 23 285 129 94 40 69 1180 538 709 228 160 61 186 24 227 131 91 40 70 1430 480 670 235 140 103 169 25 258 133 88 40 70 1320 428 595 313 126 107 152 26 249 145 85 40 70 1210 388 543 271 121 121 141 27 247 141 82 40 70 1010 350 590 249 115 95 134 28 247 140 79 40 70 850 325 616 228 105 72 126 29 247 138 76 40 —— 778 302 579 207 98 130 135 30 242 136 73 40 —— 826 282 584 191 93 171 1^8 31 223 —— 70 40 —— 982 —— 2600 —— 88 169 —— TOTAL 7129 4905 3304 1419 1394 21589 17053 23259 13590 6480 2365 8882 MEAN 230 164 107 45.8 49.8 696 568 750 453 209 76.3 296 MAX 456 205 134 67 70 1640 1160 2600 2020 456 171 652 MIN 107 125 70 40 40 66 282 238 191 88 42 126 CPSM .52 • 37 .24 .10 .11 1.58 1.29 1.70 1.03 .47 .17 .67 IN. .60 .41 .28 .12 .12 1.82 1.44 1.96 1.14 .55 .20 ,75 CAL YR 1981 TOTAL 101622 MEAN 278 MAX 2900 MIN 28 CPSM .63 IN 8.55 WTR YR 1982 TOTAL 111369 MEAN 305 MAX 2600 MIN 40 CPSM .69 IN 9.37 260 ZUMBRO RIVER BASIN 05372995 SOUTH FORK ZUMBRO RIVER AT ROCHESTER, MN LOCATION.—Lat 44°03'42", long 92°27'58", in NWfcNEJ sec.23, T.107 N., R.14 W., Olmsted County, Hydrologic Unit 07040004, on left bank 50 ft (15 m) downstream from 37th Street bridge, 0.2 mi (0.3 km) upstream from sewage plant, and 2.0 mi (3-2 km) downstream from Silver Lake Dam. DRAINAGE AREA.— 303 mi 2 (785 km 2 ). WATER-DISCHARGE RECORDS PERIOD OP RECORD.—March 1981 to current year. GAGE.—Water-stage recorder. Datum of gage is 950.00 ft (289.560 m) National Geodetib Vertical Datum of 1929- REMARKS.--Records good. Regulation at times from Silver Lake. EXTREMES FOR PERIOD OP RECORD.—Maximum discharge 2,280 ft 3 /s (64.6 m 3 /s) May 31, 1982, gage height, 10.11 ft (3.082 m); minimum discharge, 10 ft3/ s (0.28 nP/s) Oct. 23, 1981, result of regulation; minimum gage height, 3.06 ft (0.933 m) Aug. 11, 1982. EXTREMES OUTSIDE PERIOD OP RECORD.—Flood of July 6, 1978, reached a stage of about 28.0 ft (8.53 m), on upstream side of bridge, discharge 30,500 ft 3 /s (864 nP/s). This is the highest known stage since at least 1908. EXTREMES FOR CURRENT YEAR.—Peak discharges above base of 1,300 ftVs (36.8 m 3 /s) and maximum (*): Discharge Gage height Discharge Gage height Date Time (ft 3 /s) (ft) (m) Dat e Time (ft 3 /s) (m-Vs) (ft) (m) Mar. 17 1015 1,440 40.8 8.15 2.484 May 13 0730 1,310 37.1 7-97 .2.429 Mar. 24 0630 1,480 41.9 8.27 2.521 *May 31 1600 *2,280 64.6 *10.11 3.082 Minimum discharge, 10 ft 3 /s (0.28 m3/ s) Oct. 23, gage height, 3.11 ft (0.948 m) result of regulation; minimun gage height, 3.06 ft (0.933 m) Aug. 11.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1932 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 90 116 106 44 40 58 594 227 1010 149 218 293 2 87 114 101 48 39 64 608 213 664 143 119 294 3 98 111 85 47 45 55 1020 207 539 143 96 178 4 127 109 92 48 45 61 679 238 486 138 95 140 5 149 109 76 48 44 56 496 470 440 131 94 155 6 139 108 99 48 44 52 410 794 403 153 86 135 7 125 104 103 45 41 48 386 770 390 161 81 128 8 118 99 98 42 41 53 354 553 351 142 80 120 9 115 94 92 43 42 53 332 460 33§ 144 59 114 10 112 92 71 48 40 67 320 411 316; 151 66 115 11 107 91 91 41 38 80 301 366 297 133 65 103 12 98 92 91 31 38 114 354 609 280 271 •64 237 13 172 77 87 26 38 149 376 1080 260 255 43 853 14 208 88 86 27 40 323 366 718 276 120 19 772 15 129 87 86 27 41 591 , 390 669 301 164 19 400 16 •167 88 70 28 44 889 542 .590 269 230 23 330 17 193 85 66 27 45 1340 1040 722 255 148 43 283 18 219 83 57 24 45 990 845 964 245 142 48 241 19 196 99 46 27 50 1160 591 671 229 155 50 209 20 170 96 42 30 56 835 542 531 241 133 48 185 21 161 81 43 30 55 712 468 483 2161 181 45 161 22 198 81 48 34 66 588 418 475 203 135 75 147 23 73 94 50 29 64 739 383 452 19H 120 55 133 24 131 90 50 30 58 1290 356 408 189 103 132 126 25 133 90 48 32 50 1060 334 378 196 150 106 112 1931 26 133 99 49 33 50 691 320 383 317 91 107 27 126 105 50 36 58 517 292 970 176 172 102 103 28 128 102 . 48 37 59 465 271 721 168 131 79 96 29 126 93 45 36 517 260 521 172 113 159 131 30 122 92 48 39 691 243 483 159 101 222 165 31 118 —— 49 40 —— 785 —— 1700 — - 98 154 —— TOTAL 4268 2869 2173 1125 1316 15093 13891 18237 9453 4827 2646 6566 MEAN 138 95.6 70.1 36.3 47.0 487 463 588 315 156 85.4 219 MAX 219 116 106 48 66 1340 1040 1700 1010 317 222 853 MIN 73 77 42 24 38 48 243 207 159 98 19 96 CFSM .46 .32 .23 .12 .16 1.61 1.53 1.94 1.04 .52 .28 .72 IN. .52 .35 .27 .14 .16 1.85 1.71 2.24 1.16 .59 .32 .81 AC- FT 8470 5690 4310 2230 2610 29940 27550 36170 18750 9570 5250 13020 WTR YR 1982 TOTAL 82464 MEAN 226 MAX 1700 MIN 19 CFSM .75 IN 10.|12 AC-FT 163600 261 ZUMBRO RIVER BASIN 05372995 SOUTH PORK ZUMBRO RIVER AT ROCHESTER, MN—Continued WATER-QUALITY RECORDS PERIOD OP RECORD.—March 1981 to September 1982 (discontinued). PERIOD OP DAILY RECORD.— WATER TEMPERATURE: March 1981 to September 1982. SUSPENDED-SEDIMENT DISCHARGE: March 198l to September 1982. REMARKS.—During the low-flow periods, daily sediment concentrations were estimated on the basis of water records and once or twice weekly sediment samples. Suspended-sediment discharge was estimated Nov. 11 to Feb. 28. Water temperatures were obtained when sediment samples were collected. EXTREMES FOR PERIOD OP DAILY RECORD.— SEDIMENT CONCENTRATIONS: Maximum daily tiean, 1,130 mg/L July 11, 198l; minimum daily mean, 1? mg/L Mar. 9, 1982. SEDIMENT LOADS: Maximum daily, 13,200 tons (12,000 tonnes) July 12, 1981; minimum daily, 1.6 tons (1.5 tonnes Jan. 18, 1982. EXTREMES FOR CURRENT PERIOD.— SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,080 mg/L May 31; minimum daily mean, 17 mg/L Mar. 9. SEDIMENT LOADS: Maximum daily, 5,180 tons (4,700 tonnes) May 31; minimum daily, 1.6 tons (1.5 tonnes) Jan. 18. Sept 21.

TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 ONCE-DAILY DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUO SEP 9.0 14.0 16.0 26.0 20.0 6.0 9.0 16.0 16.0 24.0 28.5 3 5.5 20.5 15.5 25.5 25.0 23.0 H 12.0 3.5 18.0 16.5 5 11.0 6.5 3.0 18.0 15.0 30.0 29.5 21.0 6 12.0 14.5 6.0 4.5 12.5 15.0 26.0 21.0 7 12.0 4.0 3.5 11.5 17.5 25.0 8 11.0 2.5 5.5 15.0 17.5 29.0 9 1.0 4.5 16.5 18.0 24.0 18.0 20.0 10 6.5 6.0 20-. 0 16.0 11 12.0 7.5 8.0 21.0 19.5 23.0 23.0 12 11.0 5.0 7.5 15.5 18.5 22.5 13 12.0 5.5 8.0 15.0 21.0 21.0 20.0 19-0 14 12.0 5.0 11.5 17.0 20.0 16.5 15 11.0 2.5 11.0 15.5 17.5 24.0 15.0 16 2.0 12.0 18.0 16.0 21.0 23.0 17 11.0 2.0 18.0 18.5 26.0 18 11.0 3.0 11.0 17.0 27.0 18.0 19 10.0 2.0 10.0 18.0 27.0 27.0 20 2.0 8.0 18.0 18.0 17.0 21 2.0 9.0 14.5 17.0 25-0 22 2.0 12.0 13.5 21.0 20.5 23 3.5 15.0 13.5 24.0 24.0 16.0 24 3.0 15.5 15.5 21.0 20.0 17.0 25 9.0 2.0 16.0 16.0 20.5 27.0 20.0 26 2.0 16.5 15.5 20.0 23.0 20.0 17.0 27 2.5 16.0 15.0 22.5 20.0 28 3.5 16.5 16.0 22.5 17.0 29 6.0 13.0 17.0 24.0 21.0 19.0 30 8.0 15.5 18.0 25.0 22.0 31 9-0 7.0 17.0 20.0 20.0 MEAN 16.5 262 ZUMBRO RIVER BASIN 05372995 SOUTH PORK ZUMBRO RIVER AT ROCHESTER, MN—Continued SUSPENDED-SEDIMENT, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN MEAN MEAN MEAN AN MEAN CONCEN­ CONCEN- CONCEN­ CONCEN- EN- CONCEN­ TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS 'ION LOADS TRATION LOADS DAY (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) IG/L) (T/DAY) (MG/L) (T/DAY) OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH 1 35 33 32 10 7.2 3.0 2.7 25 3.9 2 35 8.2 38 12 6.8 3.2 2.6 24 4.1 3 46 15 44 13 5.7 3.2 3.0 24 3.6 4 97 33 50 15 6.2 3.2 3.0 24 4.0 5 96 42 55 16 5.1 3.2 3.0 25 3.8 6 72 27 59 17 6.7 3.2 3.0 26 3.7 7 81 27 53 15 7.0 3.0 2.8 55 7.1 8 58 18 46 12 6.6 2.8 2.8 21 3.0 9 56 17 38 9.6 6.2 2.9 2.8 17 2.4 10 75 23 30 7.5 4.8 3.2 2.7 29 5.2 11 100 29 . _ 6.1 6.1 2.8 2.6 41 8.9 12 86 38 6.2 6.1 2.1 2.6 78 34 13 88 63 .__ 5.2 5.9 1.8 2.6 90 41 IH 94 66 . — 5.9 5.8 1.8 2.7 240 257 15 52 18 5.9 5.8 1.8 2.8 223 354 16 82 37 5.9 4.7 1.9 3.0 245 588 17 99 52 5.7 4.5 1.8 3.0 265 923 18 83 49 . — 5.6 3.8 1.6 3.0 223 596 19 68 36 . — 6.7 3.1 1.8 3-4 208 651 20 60 28 6.5 2.8 2.0 3.8 95 214 21 54 23 .-_ 5.5 2.9 2.0 3.7 95 183 22 106 99 5.5 3.2 2.3 4.5 115 183 23 57 12 6.3 3.4 2.0 4.3 150 299 24 25 8.8 6.1 3.4 2.0 3.9 298 1040 25 16 5.7 6.1 3.2 2.2 3.4 193 552 26 33 16 .__ 6.7 3.3 2.2 3.4 108 201 27 22 7.5 7.1 3.4 2.4 3.9 97 135 28 23 7.9 6.9 3.2 2.5 4.0 79 99 29 25 8.5 6.3 3.0 2.4 87 121 30 25 8.2 6.2 3.2 2.6 125 233 31 26 8.3 3.3 2.7 135 286 TOTAL 864.1 249.5 146.4 75.6 1.0 7039.7

APRIL MAY JUNE JULY AUGUST SEPTEMBER 1 80 128 42 26 376 1100 55 22 256 197 139 116 2 174 404 40 23 143 256 62 24 162 52 114 90 3 807 2290 33 18 128 186 59 23 155 40 79 38 4 350 670 80 63 122 160 59 22 119 31 68 26 5 125 167 192 287 85 101 60 21 94 24 88 39 6 97 107 310 665 84 91 94 45 93 22 48 17 7 112 117 139 289 88 93 76 34 101 22 50 17 8 72 69 84 125 66 63 96 37 122 26 56 18 9 52 47 148 184 77 70 82 32 127 24 57 18 10 74 64 137 152 92 78 75 31 86 15 67 21 11 61 50 111 110 98 79 67 24 74 13 45 13 12 78 75 152 279 73 55 542 534 97 17 306 372 13 97 98 373 1150 85 60 424 376 69 8.0 389 874 14 104 103 112 217 122 91 126 47 58 3.0 209 458 15 97 102 113 204 108 88 163 78 42 2.2 96 104 16 103 151 92 147 135 98 272 169 28 1.7 84 75 17 284 842 187 408 127 87 131 52 25 2.9 77 59 18 184 420 350 939 116 77 94 36 29 3.8 74 48 19 98 156 208 377 97 60 92 47 56 7.6 68 38 20 123 180 141 202 105 68 459 219 78 10 62 31 21 123 155 111 145 110 64 1050 618 77 9.4 59 26 22 76 86 83 106 100 55 501 189 100 24 57 23 23 87 90 85 104 105 54 212 69 70 10 57 20 24 72 69 88 97 143 73 110 31 111 46 58 20 25 54 49 113 115 190 101 338 310 78 22 57 17 26 53 46 138 143 117 61 1040 972 98 24 57 16 27 55 43 367 971 68 32 392 212 92 25 67 19 28 77 56 152 296 73 33 213 75 82 17 77 20 29 50 35 95 134 130 60 168 51 111 54 118 47 30 43 28 114 187 56 24 152 41 127 76 93 41 31 —— — - 1080 5180 —— —— 143 38 117 49 —— —— TOTAL —— 6897 __ 13343 _ _ 3518 _ _ 4479 878.6 —— 2721 FOR YEAR: 40300.9 TONS. 263 ZUMBRO RIVER BASIN 05374900 ZUMBRO RIVER AT KELLOGG, MN LOCATION.—Lat 44°l8'43", long 92°00'14", in SWJ sec. 22, T.110 N., R.10 W., Wabasha County, Hydrologic Unit 07040004, on right bank at downstream side of bridge on U.S. Highway 61, and 4 mi (6.4 km) above mouth. DRAINAGE AREA. —1,400 mi 2 (3,630 km 2 ). PERIOD OP RECORD.--August 1975 to current year. GAGE.—Water-stage recorder. Datum of gage is 669.47 ft (204.054 m) National Geodetic Vertical Datum of 1929. REMARKS.--Records fair except those for winter period and those for periods of no gage-height record, Jan. 10 to Feb. 24 and Mar. 20 to Apr. 27, which are poor. Some regulation by powerplant upstream from station. AVERAGE DISCHARGE. — 7 years, 700 ft 3 /s (19.82 m3 /s), 6.79 in/yr (172 mm/yr). EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 16,800 ft 3 /s (476 m3/s) July 8, 1978, gage height, 13-70 ft (4.176 m); minimum daily, 140 ftVs (3-96 m^/s) Dec. 3, 1980; minimum gage height, 1.69 ft (0.515 m) Dec. 2, 1980, result of freezeup. EXTREMES OUTSIDE PERIOD OF RECORD.—A discharge of 33,000 ft 3 /s (935 m^/s) occurred on July 22, 1951, at station 05374500, 20 mi (32 km) upstream and this was the greatest since 1938. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 5,370 ft 3 /s (152 m 3/s) June 2, gage height, 7-82 ft (2.384 m), no other peak above base of 3,500 ft3/s (99.1 m-Vs); minimum daily discharge 295 ft 3 /s (8.35 nP/s) Jan. 16-19; minimum gage height, 2.21 ft (0.674 m) Nov. 26-28.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 540 767 484 330 310 420 1700 1070 3900 664 563 726 2 520 803 610 325 310 420 1600 1060 4720 653 • 568 709 3 510 809 441 325 310 415 1500 1000 2990 648 508 896 4 500 815 436 320 310 410 2100 799 2410 621 450 852 5 540 809 469 320 310 410 1950 920 2120 616 553 779 6 580 803 460 317 310 410 1750 1030 1750 610 553 709 7 600 797 450 315 310 410 1600 1080 1530 670 543 670 8 580 791 484 315 310 410 1500 1410 1430 632 548 643 9 594 548 464 310 310 410 1400 1550 1350 659 548 632 10 761 584 533 310 310 410 1320 1460 1280 698 538 616 11 579 692 450 310 310 410 1270 1290 1210 721 400 605 12 558 508 404 310 310 410 1240 1190 1110 643 315 616 13 600 533 409 310 310 420 1200 1380 1040 626 423 1200 14 600 574 400 310 315 480 1350 1950 1020 767 391 2020 15 648 493 400 300 320 650 1400 1870 1080 704 450 2420 16 692 469 395 295 330 852 1400 1870 1050 715 432 1940 17 584 553 390 295 340 1250 1500 1940 1050 797 361 1630 18 654 568 380 295 360 1410 2000 2140 1010 744 391 1350 19 670 493 375 295 380 2560 2300 2450 955 653 423 1220 20 676 498 370 300 400 2520 2200 2190 922 637 369 1080 21 750 409 365 301 420 2400 2000 1850 883 670 413 976 22 809 361 360 302 445 2000 1800 1680 833 632 348 852 23 809 340 355 303 450 1800 1600 1540 791 653 409 797 24 815 331 350 304 440 1900 1500 1460 767 621 423 773 25 594 323 350 305 440 2200 1400 1370 755 610 523 755 26 654 331 345 306 430 2400 1300 1300 732 594 488 709 27 676 327 345 307 430 2100 1240 1260 715 600 543 670 28 632 344 340 308 430 1800 1200 1550 698 643 548 659 29 553 404 340 309 —— 1600 1130 1760 681 600 446 664 30 563 422 335 310 —— 1500 1050 1620 670 600 464 664 31 773 —— 335 310 —— 1500 —— 1910 —— 533 558 —— TOTAL 19614 16499 12624 9572 9960 36287 46500 46949 41452 20234 14490 28832 MEAN 633 550 407 309 356 1171 1550 1514 1382 653 467 961 MAX 815 815 610 330 450 2560 2300 2450 4720 797 568 2420 MIN 500 323 335 295 310 410 1050 799 670 533 315 605 CFSM .45 .39 .29 .22 .25 .84 1.11 1.08 • 99 .47 .33 .69 IN. .52 .44 .34 .25 .26 .96 1.24 1.25 1.10 .54 .39 .77 CAL YR 1981 TOTAL 279911 MEAN 767 MAX 6010 MIN 280 CFSM .55 IN 7.44 WTR YR 1982 TOTAL 303013 MEAN 830 MAX 4720 MIN 295 CFSM .59 IN 8.05 264 WHITEWATER RIVER BASIN 05376000 NORTH PORK WHITEWATER RIVER NEAR ELBA, MN (Hydrologlc bench-mark station) LOCATION.—Lat 44°05'30", long 92°03'57", in sec.7, T.107 N., R.10 W., Winona County, Hydrologic Unit 07040003, on left bank 2.3 mi (3.7 km) upstream from Middle Pork, 2.4 mi (3-9 km) west of Elba, and 3-5 mi (5.6 km) upstream from confluence with South Pork. DRAINAGE AREA. —101 mi 2 (262 km 2 ). WATER-DISCHARGE RECORDS PERIOD OP RECORD.—May 1939 to September 1941, July 1967 to current year. REVISED RECORDS.—WRD MN-74: 1967(M), 1969(M), 1971(M), 1972(M), 1973(M). WRD MN-80-2: 1978. GAGE.—Water-stage recorder. Datum of gage is 769.60 ft (234.574 m) National Geodetic Vertical Datum of 1929. Prior to Oct. 12, 1939, nonrecording gage at site 2 mi (3.2 km) downstream at different datum. Oct. 12, 1939, to Sept. 30, 1941, water-stage recorder at site 600 ft (183 m) downstream at present datum. Prior to July 6, 1978, water-stage recorder at same site and present datum (gage destroyed by ,flood of July 1978), July 6 to Oct. 30, 1978, nonrecording gage at same site and present datum. REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.—17 years (water years 1940-41, 1968-82), 44.6 ft 3 /s (1.263 nP/s), 6.00 in/yr (152mm/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 16,100 ft3/s (456 m3/s) June J21, 1974, gage height, 16.32 ft (4.974 m) from floodmark; minimum, 11 ft 3 /s (0.31 m3 /s) Feb. 21, 1968. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 448 ft3 /s (12.7 m3/s) May 17. gage height, 5.40 ft (1.646 m); no peak above base of 600 ft 3 /s (17-0 m 3 /s), minimum daily discharge, 22 ft 3 /s (0.62 m3 /s) Dec. 10, 23; minimum gage height, 3.77 ft (1.149 m) Jan. 23, 24, 28, 30, 31, Feb. 1.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 28 28 27 25 23 25 91 41 111 39 35 51 2 27 27 26 25 24 25 76 40 80 39 37 39 3 27 28 25 25 26 25 110 39 71 39 35 34 4 30 28 25 25 26 25 68 40 67 39 36 32 5 31 28 23 25 26 25 66 48 64 37 35 32 6 31 27 25 25 26 24 52 73 61 38 34 32 7 31 27 24 25 26 24 54 76 60 42 34 32 8 29 26 24 25 26 24 52 62 58 40 33 31 9 28 26 24 25 24 24 48 56 56 38 31 31 10 28 26 22 25 24 25 46 53 56 38 31 32 11 28 25 24 25 24 25 44 52 53 37 31 32 12 27 25 24 25 24 26 46 54 52 36 31 33 13 27 25 25 25 25 30 46 118 50 37 30 50 14 29 25 24 25 25 41 44 92 49 37 31 43 15 36 26 23 24 24 56 44 80 55 38 31 36 16 32 25 24 25 25 143 50 81 53 39 31 34 17 32 25 25 25 25 259 85 149 55 39 31 34 18 36 25 23 26 25 200 76 140 52 37 31 33 19 35 26 23 24 25 209 62 99 48 35 31 32 20 34 25 23 29 25 105 60 84 47 35 31 31 21 32 25 23 25 25 68 58 78 45 35 30 31 22 31 25 23 26 25 57 53 79 45 37 32 31 23 30 25 22 24 25 115 51 74 44 35 32 30 24 29 25 23 25 25 278 49 69 43 35 36 30 25 30 25 23 26 25 145 47 66 44 34 40 30 26 29 26 24 25 24 89 45 64 43 35 35 30 27 30 26 24 24 25 69 43 67 43 41 33 29 28 29 25 24 25 25 65 41 70 42 36 32 30 29 29 25 24 23 — _ 80 42 63 44 35 37 35 30 29 24 24 23 —— 129 41 60 40 34 40 39 31 30 —— 24 24 — - 132 —— 230 —— 34 36 —— TOTAL 934 774 741 773 697 2567 1690 2397 1631 1150 1033 1019 MEAN 30.1 25.8 23.9 24.9 24.9 82.8 56.3 77-3 54.4 37.1 33.3 34.0 MAX 36 28 27 29 26 278 110 230 111 42 40 51 MIN 27 24 22 23 23 24 41 39 40 34 30 29 CPSM .30 .26 .24 .25 .25 .82 .56 .77 .54 .37 .33 .34 IN. .34 .29 .27 .28 .26 .95 .62 .88 .60 .42 .38 .38 CAL YR 1981 TOTAL 13338 MEAN 36.5 MAX 397 MIN 22 CPSM .36 IN 4.91 WTR YR 1982 TOTAL 15406 MEAN 42.2 MAX 278 MIN 22 CPSM .42 IN 5.67 265 WHITKWATSR RIVER BASIN 05376000 NORTH PORK WHITEWATER RIVER NEAR ELBA, MN—Continued (Hydrologic bench-mark station)

WATER-QUALITY RECORDS PERIOD OP RECORD.--Water years 1967 to current year. REMARKS.—Letter K indicates non-ideal colony count.

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

SPE- BARO­ SPE­ CT"IC METRIC STREAM- CIFIC CON­ PRES­ FLOW, CON­ DUCT­ TEMPER­ SURE OXYGEN , INSTAN­ DUCT­ ANCE PH PH ATURE, TEMPER­ (MM DIS­ TIME TANEOUS ANCE LAB LAB AIR ATURE OF SOLVED DATE (CPS) (UMHOS) (UMHOS) (UNITS) (UNITS) (DEG C) (DEG C) HG) (MG/L) (00061) (00095) (90095) (00400) (00403) (00020) (00010) (00025) (00300) OCT 06... 1140 30 572 530 8.2 8.0 — 11.0 — — NOV 18... 1510 26 575 540 8.3 8.2 5.0 6.0 — 13.7 JAN 05... 1130 26 550 530 8.2 8.1 -11.0 .0 — 14.0 PEB 03... 1645 25 530 550 8.0 8.1 -24.0 .5 757 14.4 MAR 25... 1600 116 365 376 8.1 7.8 -1.0 4.0 745 11.6 APR 14... 1430 43 590 545 8.6 8.3 20.0 10.0 740 12.8 MAY 26... 1300 64 600 604 8.2 8.1 14.0 13.0 746 9-9 JUN 30... 1100 44 580 564 8.5 8.4 22.0 14.5 748 13.1 JUL 28... 1100 36 550 552 8.0 7-9 25.0 18.0 747 9.0 AUG 19... 1100 30 560 549 8.3 8.1 27.0 18.0 745 9.0 SEP in... 1330 40 510 551 8.1 7.9 16.0 14.0 749 9.3

OXYGEN, COLI- STREP­ HARD­ DIS­ PORM, TOCOCCI NESS MAGNE­ SODIUM POTAS­ SOLVED FECAL, PECAL, HARD­ NONCAR- CALCIUM SIUM, SODIUM, AD­ SIUM, (PER­ 0.7 KF AGAR NESS BONATE DIS­ DIS­ DIS­ SORP­ DIS­ CENT UM-MP (COLS. (MG/L (MG/L SOLVED SOLVED SOLVED TION SOLVED SATUR­ (COLS,/ PER AS AS (MG/L (MG/L (MG/L RATIO (MG/L DATE ATION) 100 ML) 100 ML) CAC03) CAC03) AS CA) AS MG) AS NA) AS K) (00301) (31625) (31673) (00900) (95902) (00915) (00925) (00930) (0093D (00935) OCT 06... — 290 330 300 29 77 26 6.8 .2 2.2 NOV 18... 110 K12 35 290 17 72 26 8.2 .2 1.5 JAN 05... 97 K4 K4 280 5.0 69 25 5.9 .2 1.1 PEB 03... 101 K16 50 280 9.0 67 27 9.8 .3 1.4 MAR 25... 91 K1400 K11000 180 27 46 15 3.8 .1 6.0 APR 14... 117 <100 130 280 20 71 25 6.5 .2 1.8 MAY 26... 96 560 — 300 24 79 24 6.4 .2 1.8 JUN 30... 131 K170 760 300 66 78 25 6.2 .2 1.7 JUL 28... 97 — 680 270 8.0 69 23 8.0 .2 1.9 AUG 19... 97 100 K1700 280 16 70 26 7.7 .2 1.5 SEP 14... 92 K17000 K15000 290 27 73 25 7.4 .2 4.0 WHITSWATKR RIVER BASIN

05376000 NORTH FORK WHTTEWATER RIVER NEAR ELBA, MN--Continued

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

SOLIDS, SOLIDS, NITRO­ ALKA­ CHLO­ PLUO- SILICA, RESIDUE SUM OP SOLIDS, NITRO­ GEN, LINITY SULPATE RIDE, RIDE, DIS­ AT 180 CONSTI­ DIS­ GEN, N02+N03 LAB DI S— DIS­ DIS­ SOLVED DEG. C TUENTS, SOLVED N02+N03 DIS­ (MG/L SOLVED SOLVED SOLVED (MG/L DIS­ DIS­ (TONS TOTAL SOLVED AS (MG/L (MG/L (MG/L AS SOLVED SOLVED PER (MG/L (MG/L DATE CAC03) AS SOt) AS CL) AS P) SI02) (MG/L) (MG/L) DAY) AS N) AS N) (90tlO) (00915) (009tO) (00950) (00955) (70300) (70301) (70302) (00630) (00631) OCT 06... 270 13 23 .2 16 317 327 25.7 3.2 3.1 NOV 18... 270 17 10 .1 13 339 310 23.6 3.2 3.1 JAN 05... 270 17 8.3 .2 15 335 301 23.5 3.1 3.1 ' PEB 03... 270 18 9.8 .1 16 335 311 — 3.0 3.0 MAR 25... 150 13 11 .1 11 228 196 71.1 1.0 1.8 APR 11... 260 17 12 .1 It 323 301 37.8 1.1 1.1 MAY 26... 272 19 13 .2 in t02 321 69.5 5.8 5.5 JUN 30... 232 17 10 .2 13 357 291 12.1 1.7 1.7 JUL 28... 259 17 12 .1 15 358 302 35.2 3.2 3.2 AUG 19... 266 18 11 .2 It 315 308 28.2 2.8 2.7 SEP It... 259 17 11 .2 17 223 311 21.3 3.7 3.7

NITRO­ NITRO­ NITRO­ SEDI­ SED. NITRO­ GEN, GEN, AM­ GEN, AM­ PHOS­ MENT, SUSP. GEN, AMMONIA MONIA + MONIA + PHOS­ PHORUS , CARBON, SEDI­ DIS­ SIEVE AMMONIA DIS­ ORGANIC ORGANIC PHORUS, DIS­ ORGANIC MENT, CHARGE, DIAM. TOTAL SOLVED TOTAL DIS. TOTAL SOLVED TOTAL SUS­ SUS­ % FINER (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MO/L PENDED PENDED THAN DATE AS N) AS N) AS N) AS N) AS P) AS P) AS C) (MG/L) (T/DAY) .062 MM (00610) (00608) (00625) (00623) (00665) (00666) (00680) (8015D (80155) (70331) OCT 06... .020 .020 .22 .19 .200 .200 1.8 19 1.5 80 NOV 18... <.010 .010 <.10 .10 .200 .200 .9 — — — JAN 05... .050 .030 .32 .30 .150 .110 1.3 16 1.1 91 PEB 03... .280 .2tO .It 1.0 .3tO .350 1.1 — — — MAR 25... .650 .560 2.20 1.6 .520 .290 — 152 18 100 APR It... .020 .020 .tt .23 .150 .110 1.5 10 1.2 82 MAY 26... .060 .oto .59 .50 .280 .170 3.2 156 27 82 JUN 30... .030 .030 .20 .30 .170 .110 1.6 11 5.2 — JUL 28... .070 .060 .80 .70 .360 .230 3.6 — — — AUG 19... .010 <.010 .50 <.10 .2tO .190 2.1 32 2.6 82 SEP It... .070 .050 1.10 .80 .370 .270 — 81 9.2 99 267 WHITEWATER RIVER BASIN 05376000 NORTH PORK WHITEWATER RIVER NEAR ELBA, MN—Continued

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

BERYL­ CHRO­ ARSENIC BARIUM, LIUM, CADMIUM MIUM, COBALT, COPPER, IRON, LEAD, LITHIUM ARSENIC DIS­ DIS­ DIS­ DIS­ DIS­ DIS­ DIS­ DIS­ DIS- DIS­ TOTAL SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS AS) AS AS) AS BA) AS BE) AS CD) AS CR) AS CO) AS CU) AS PE) AS PB) AS LI) (01002) (01000) (01005) (01010) (01025) (01030) (01035) (01040) (01046) (01049) (01130) MAR 25... 1600 2 1 66 <1 <1 4 <3 <10 62 <10 <4 SEP 14... 1330 2 2 77 <1

CARBON , MANGA­ MERCURY MOLYB­ SELE­ STRON­ VANA­ CARBON, ORGANIC NESE, TOTAL MERCURY DENUM, SELE­ NIUM, SILVER, TIUM, DIUM, ZINC, ORGANIC SUS- DIS- RECOV- DIS­ DIS­ NIUM, DIS­ DIS­ DIS­ DIS­ DIS­ DIS- FENDED SOLVED ERABLE SOLVED SOLVED TOTAL SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED TOTAL (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (MG/L (MG/L DATE AS MN) AS HG) AS HG) AS MO) AS SE) AS SE) AS AG) AS SR) AS V) AS ZN) AS C) AS C) (01056) (71900) (71890) (01060) (01147) (01145) (01075) (01080) (01085) (01090) (00681) (00689) MAR 25... 50 <.l <.l <10 <1 <1 <1 67 <6.0 7 5.4 SEP 14... 27 <.l <.l <10

GROSS GROSS GROSS GROSS GROSS GROSS GROSS GROSS RADIUM ALPHA, ALPHA, ALPHA, ALPHA, BETA, BETA, BETA, BETA, 226, URANIUM DIS­ SUSP. DIS­ SUSP. DIS­ SUSP. DIS­ SUSP. DIS­ NATURAL SOLVED TOTAL SOLVED TOTAL SOLVED TOTAL SOLVED TOTAL SOLVED, DIS­ (UG/L (UG/L (PCI/L (PCI/L (PCI/L (PCI/L (PCI/L (PCI/L RADON SOLVED AS AS AS AS AS AS AS SR/ AS SR/ METHOD (UG/L DATE U-NAT) U-NAT) U-NAT) U-NAT) CS-137) CS-137) YT-90) YT-90) (PCI/L) AS U) 80030 80040 01515 01516 03515 03516 80050 80060 095H 22703 SEP 14... 70 3.7 48 2.5 120 2.1 110 2.0 0.07 1.0

NAPH­ THA­ LENES , POLY- CHLOR- DI- DI- PCB, CHLOR. ALDRIN, DANE, ODD, DDE, DOT, AZINON, ELDRIN TIME TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (39516) (39250) (39330) (39350) (39360) (39365) (39370) (39570) (39380) MAY 26.. 1300 .20 .01

HEPTA- METH- METHYL METHYL ENDO- HEPTA- CHLOR MALA- OXY- PARA- TRI- SULPAN, ENDRIN, ETHION, CHLOR, EPOXIDE LINDANE THION, CHLOR, THION, THION, TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (39388) (39390) (39398) (39410) (39420) (39340) (39530):39530) (39480) (39600) (39790) MAY 26..

PARA- PER- TOX- TOTAL MIREX, THION, THANE APHENE, TRI- 2,4-D, 2, 4-DP 2,4,5-T SILVEX, TOTAL TOTAL TOTAL TOTAL THION TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (39755) (39540) (39034) (39400) (39786) (39730) (82183) (39740) (39760) MAY 26... <1 .01 268 WHITEWATER RIVER BASIN 05376000 NORTH PORK WHITEWATER RIVER NEAR ELBA, MN—Continued

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

NAPH­ THA­ LENES , POLY- CHLOR- DI- DI- PCB, CHLOR. ALDRIN, DANE, ODD, DDE, DOT, AZINON, ELDRIN TIME TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (39516) (39250) (39330) (39350) (39360) (39365) (39370) (39570) (39380) MAY 26.. 1300 .20 .01

HEPTA- METH- METHYL METHYL ENDO- HEPTA- CHLOR MALA- OXY- PARA- TRI- SULPAN, ENDRIN, ETHION, CHLOR, EPOXIDE LINDANE THION, CHLOR, THION, THION, TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (39388) (39390) (39398) (39410) (39420) (39340) (39530) (39480) (39600) (39790) MAY 26..

PARA- PER- TOX- TOTAL MIREX, THION, THANE APHENE, TRI- 2,4-D, 2, 4-DPI 2,4,5-T SILVEX, TOTAL TOTAL TOTAL TOTAL THION TOTAL TOTAL TOTAL TOTAL DATE (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (UG/L) (39755) (39540) (39034) (39400) (39786) (39730) (82183) (39740) (39760) MAY 26... <1 .01

CHLOR- DI- PCB, PCN, ALDRIN, DANE, ODD, DDE, DOT, ELDRIN, TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ IN BOT­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TOM MA­ TIME TERIAL TERIAL TERIAL TERIAL TERIAL TERIAL TERIAL TERIAL DATE (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (39519) (39251) (39333) (3935D (39363) (39368) (39373) (39383) JUN 30... 1100 <1

ENDO- HEPTA- HEPTA- METH- TOXA- SULPAN, ENDRIN, CHLOR, CHLOR LINDANE OXY- MIREX, PER- PHENE , TOTAL TOTAL TOTAL EPOXIDE TOTAL CHLOR, TOTAL THANE TOTAL IN BOT­ IN BOT­ IN BOT­ TOT. IN IN BOT­ TOT. IN IN BOT­ IN IN BOT­ TOM MA­ TOM MA­ TOM MA­ BOTTOM TOM MA­ BOTTOM TOM MA­ BOTTOM TOM MA­ TERIAL TERIAL TERIAL MATL. TERIAL MATL. TERIAL MATERIL TERIAL DATE (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (UG/KG) (39389) (39393) (39413) (39423) (39343) (39481) (39758) (81886) (39403) JUN 30... <1.00 269 WHITIir/ATER RIVER BASIN

05376800 WHITEWATErt RIVER NEAR BEAVER, MM LOCATION.—Lat 44°09'03", long 92°00'19", in SWjSEi sec.15, T.108 N., R.10 w". , Winona County, Hydrologic Unit 07040003, on left bank at downstream side of bridge on County Road No. 30, 0.5 mi (0.8 km) above mouth of Beaver Creek, and 4.7 mi (7.6 km) miles north of Elba. DRAINAGE.—271 mi 2 (702 km 2 ). PERIOD 0? RECORD.—May 1975 to current year. GAGE.—Water-stage recorder. Datum of gage is 692.01 ft (210.925 m) National Geodetic Vertical Datum of 1929. Prior to Oct. 1, 1976, at datum 2.00 ft (0.610 m) higher. REMARKS.—Records fair except those for winter period, which are poor. AVERAGE DISCHARGE.--? years (water years 1976-82), 152 ft 3 /s (4.305 m3/s), 7.62 in/yr (194 mra/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge. 15,400 ft 3 /s (436 mVs) July 6, 1978, gage height, 12.88 ft (3.926 m), present datum; minimum daily, 53 ft'/s (1.50 m^/s) Feb. 20 to Mar. 20, 1978; minimum gage height, 1.90 ft (0.579 m) Sept. 12, 1978. EXTREMES OUTSIDE PERIOD OF RECORD.—Maximum discharge since at least 1939, 19,200 ftVs (544 raVs) June 21, 1974, gage height, 13.00 ft (3.962 m), present datum, determined by contracted-opening measurement. EXTREMES FOR CURRENT YEAR .—Maximum discharge, 768 ftVs (21.7 m3/ s ) May 18, gage height 4.58 ft (1.396 m), no peak above base of 2,000 ft^/s (56.6 nP/s); minimum daily discharge, 92 ft'/s (2.61 m'/s) Jan. 5-18; minimum recorded gage height, 1.84 ft (0.561 m) Feb. 26-27.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT MOV DEC JAN FE8 APR MAY JUN JUL AUG SEP 1 130 121 122 96 93 94 264 149 328 133 126 150 2 126 122 118 95 93 94 236 145 252 132 140 129 3 124 122 116 94 93 96 262 144 225 132 130 116 4 132 118 117 93 93 94 220 142 209 131 128 111 5 132 120 115 92 94 94 208 170 195 129 126 111 6 136 122 118 92 94 94 176 216 186 129 125 111 7 128 121 118 92 94 94 179 233 182 140 124 110 8 124 122 118 92 94 94 169 206 174 138 123 110 9 120 119 116 92 94 94 164 194 169 130 122 109 10 120 120 118 92 94 94 160 188 167 132 121 121 11 116 120 116 92 94 94 156 184 161 132 120 121 12 116 116 116 92 94 96 156 190 160 132 120 117 13 116 114 116 92 94 102 161 287 154 140 120 133 14 124 116 115 92 94 126 159 267 153 134 120 140 15 130 116 113 92 95 161 163 245 164 132 120 124 16 122 115 111 92 95 330 178 252 159 134 120 116 17 124 114 108 92 95 576 233 278 157 132 120 115 18 133 114 107 92 95 446 238 493 160 128 120 113 19 136 116 106 93 95 527 208 349 151 128 120 112 20 ' 127 117 105 93 96 364 208 307 149 128 120 112 21 123 115 105 93 96 286 204 277 145 128 120 112 22 119 114 105 93 95 238 191 275 144 128 122 110 23 118 115 105 93 94 286 185 250 141 128 125 110 24 118 116 105 93 94 578 180 231 139 127 130 108 25 121 116 105 93 96 396 174 218 141 126 135 108 26 120 117 104 93 98 280 170 211 138 128 130 109 27 122 117 103 93 96 228 164 217 136 140 125 110 28 124 116 102 93 94 212 161 215 ,135 130 124 110 29 124 116 100 93 220 158 202 139 128 124 116 30 126 115 98 93 —— 298 151 194 135 127 122 133 31 123 —— 97 93 —— 340 —— 407 —— 126 118 —— TOTAL 3854 3522 3418 2875 2646 7126 5636 7336 5048 4062 3840 3507 MEAN 124 117 110 92.7 94.5 230 188 237 168 131 124 117 MAX 136 122 122 96 98 578 264 493 328 140 140 150 MIN 116 114 97 92 93 94 151 142 135 126 118 108 CFSM .46 .43 .41 .34 .35 .85 .69 .88 .62 .48 .46 .43 IN. .53 .48 .47 .39 .36 .98 .77 1.01 .69 .56 .53 .48 CAL YR 1981 TOTAL 53186 MEAN 146 MAX 468 MIN 97 CFSM .54 IN 7.30 WTR YR 1982 TOTAL 52870 MEAN 145 MAX 578 MIN 92 CFSM .54 IN 7.26 270 GARVIN BROOK BASIN 05378220 GARVIN BROOK AT STOCKTON, MN LOCATION.—Lat 44°01'24", long 91°47'06", in SW4SE4 sec. 33, T.107 N., R.8 W., Winona County, Hydrologic Unit 07040003, on left bank 7 ft (2.1 m) downstream from Chicago and Northwestern Railroad bridge, 1.0 mi (1.6 km) west of Stockton, 0.9 mi (1.4 km) upstream from Stockton Valley Greek. PERIOD OP RECORD.--March to September 1982 (no winter record). GAGE.—Water-stage recorder with peak stage indicator. Datum of gage is 756 ft (230 m) National Geodetic Vertical Datum of 1929, from topographic map. REMARKS.—Records good. EXTREMES POK CURRENT PERIOD.—March to September 1982: Maximum discharge during period, 115 ft 3 /s (3.26 m^/s) May 31, gage height, 3.72 ft (1.134 m); minimum, 8.5 ft 3/s (0.24 m^/s) Sept. 26, 27; minimum gage height, 1.99 ft (0.607 m) Mar. 6, 9-

DISCHARGE, IN CUBIC FEET PER SH^OrtD, WATER YEAR OCTOBER 1981 TO JSEPTRMBER 1932 MEAM VALUES DAY NOV DEC JAU MAR APR MAY JUN JUL AUG SEP 1 9.8 12 11 13 11 U 13 2 9.8 12 11 12 11 11 10 3 9.8 12 10 12 11 12 9.8 4 9.3 11 11 12 11 12 9.7 5 9.8 U 13 12 12 11 9.8 6 9-9 11 13 12 17 11 9-7 7 9-9 11 12 12 13 11 9.5 8 9.9 11 12 12 12 11 9.5 9 9.8 11 11 12 11 11 9.4 10 10 11 11 12 11 11 10 11 10 11 10 12 11 10 9.7 12 11 11 14 12 11 10 9.5 13 12 11 15 12 11 10 10 14 12 11 13 12 11 10 10 15 12 11 12 12 11 10 10 16 15 12 13 12 11 10 9.7 17 13 12 13 12 11 10 9.8 18 13 11 13 12 11 10 9.5 19 13 11 12 12 11 10 9-4 20 12 11 12 12 11 10 9.2 21 12 11 12 12 11 10 9.1 22 12 11 12 11 11 10 8.9 23 13 11 12 12 11 10 8.9 24 13 11 12 11 11 14 8.8 25 13 11 12 12 11 11 8.9 26 12 11 12 11 11 10 8.7 27 12 11 12 11 13 10 8.7 28 12 11 12 11 11 10 8.9 29 12 11 12 11 11 10 9-7 30 15 11 12 10 11 10 14 31 13 —— 24 11 9.8 TOTAL 360.5 335 386 353 353 326.8 291.8 MEAN 11.6 11.2 12.5 1.8 11.4 10.5 9-73 MAX 15 12 24 1 13 17 14 14 MIN 9.8 11 10 10 11 9.8 8.7 GARVIN BROOK BASIN 271 05378230 STOCKTON VALLEY CREEK AT STOCKTOM, MM LOCATION.—Lat 44°00'56", long 91°45'36", in SE4NEJ, sec. 3, T.106 N., R.8 W., Winona County, Hydrologic Unit 07040003, on left bank at driveway to abandoned farmstead 100 ft (30 ra) east of County Road, 0.9 mi (1.4 km) above mouth and 1.0 ml (1.6 km) south of Stockton. WATER-DISCHARGE RECORDS PERIOD OP RECORD.—February to September 1982 (no winter record). GAGE.—Water-stage recorder. Datum, of gage is 750 ft (229 m) National Geodetic Vertical Datum of 1929, from topographic map. REMARKS.—Records good. EXTREMES FOR CURRENT PERIOD.—February to September 1982: Maximum discharge during period, 180 ft3/s (5.10 m3/s) May 31, gage height, 5.00 ft (1.524 m)j minimum, 7.3 ft3/s (0.21 nP/s) Aug. 12, gage height, 1.96 ft (0.597 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 —— 9.2 13 11 13 9.7 8.7 12 2 —— 9.2 13 11 12 9.3 8.5 9.5 3 —— 9.2 13 11 12 9.5 8.5 9.1 4 —— 9.2 13 12 11 9.2 8.6 8.8 5 —— 9.1 13 15 11 9.2 8.6 9.1 6 __ 9-1 12 14 11 12 8.4 9.0 7 —— 9.0 12 12 11 13 8.4 8.9 8 —— 9.2 12 11 11 9.6 8.4 8.8 9 —— 9.2 12 11 11 9.7 8.3 8.8 10 —— 9.1 12 11 11 9.7 . 8.3 9.5 11 __ 9.6 12 11 10 9.8 8.5 9.1 12 —— 11 13 12 11 9.5 8.3 8.9 13 —— 12 12 12 10 9.3 8.6 11 14 —— 12 12 11 11 9.0 8.4 11 15 —— 12 13 11 11 9.3 8.5 9.9 16 __ 18 13 13 11 9.1 8.6 9.4 17 —— 14 14 13 11 9.2 8.4 9.6 18 —— 14 13 13 10 9.0 8.3 9.4 19 —— 14 12 12 10 8.9 8.4 9.2 20 —— 13 12 12 11 8.9 8.5 9.1 21 —— 12 12 12 10 8.8 8.1 8.9 22 —— 12 12 12 10 9.0 8.8 8.9 23 —— 13 11 11 10 8.6 8.6 8.9 24 —— 14 11 11 9.7 8.6 12 8.9 25 9.0 13 11 11 11 8.8 9.6 8.9 26 9.1 13 11 12 10 8.8 8.9 8.8 27 9.2 12 11 12 9.7 11 8.9 8.9 28 9-1 12 11 11 9.4 9.1 8.4 9.0 29 —— 12 11 11 10 9.0 9.6 9.6 30 —— 14 11 11 9.7 8.8 9.4 18 31 —— 13 —— 32 —— 8.8 9.0 —— TOTAL __ 361.1 363 385 319.5 292.2 270.5 288.9 MEAN —— 11.6 12.1 12.4 10.7 9.43 8.73 9.63 MAX —— 18 14 32 13 13 12 18 MIN —— 9.0 11 11 9.4 8.6 8.1 8.8 272 GARVIN BROOK BASIN 05378230 STOCKTON VALLEY CREEK AT STOCKTON, MN—Continued WATER-QUALITY RECORDS PERIOD OP RECORD.—February 1982 to September 1982. PERIOD OP DAILY RECORD.~ SUSPENDED-SEDIMENT DISCHARGE: February 1982 to September 1982. REMARKS.--Sediment observer collects suspended-sediment samples weekly and daily during periods of increased runoff. An automatic ISCO sampler was used to collect samples during runoff events. EXTREMES FOR CURRENT PERIOD.— SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,700 mg/L May 31; minimum daily mean, 10 mg/L Sept. 20-27. SEDIMENT LOADS: Maximum daily, 251 tons (228 tonnes) May 31; minimum daily, 0.24 tons (0.22 tonnes) Sept. 21-27.

SUSPENDED-SEDIMENT, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN MEAN MEAN MEAN MEAN MEAN CONCEN­ CONCEN­ CONCEN­ CONCEN­ CONCEN­ CONCEN­ TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS DAY (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MQ/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH

1 20 .50 2 20 .50 3 20 .50 4 20 .50 5 20 .49

6 20 .49 7 20 .49 8 20 .50 9 20 .50 10 20 .49

11 25 .65 12 29 .86 13 36 1.2 IH 31 1.0 15 16 .52 16 144 7.5 17 68 2.6 18 95 3.6 19 82 3.1 20 52 1.8 21 43 1.4 22 39 1.3 23 35 1.2 24 30 1.1 25 20 .49 25

26 20 .49 20 .70 27 20 .50 20 .65 28 20 .49 20 .65 29 25 .81 30 71 2.7 31 60 2.1 TOTAL 41.28 273 GARVIN BROOK BASIN

05378230 STOCKTON VALLEY CREEK AT STOCKTON, MN—Continued SUSPENDED-SEDIMENT, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

MEAN MEAN MEAN MEAN MEAN MEAN CONCEN­ CONCEN­ CONCEN­ CONCEN­ CONCEN­ CONCEN­ TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS DAY (MG/L) (T/DAY) (MG/L) (T/DAY) (F1G/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) APRIL MAY JUNE JULY AUGUST SEPTEMBER

1 55 1.9 24 • 71 130 4.6 31 .81 30 .70 43 1.4 2 50 1.8 24 .71 90 2.9 30 • 75 25 .57 30 .77 3 45 1.6 24 .71 74 2.4 40 1.0 25 .57 25 .61 4 40 1.4 40 1.3 60 1.8 51 1.3 56 1.3 25 .59 5 35 1.2 145 5.9 55 1.6 50 1.2 50 1.2 25 .61 6 40 1.3 90 3.4 50 1.5 87 4.1 40 .91 20 .49 7 35 1.1 50 1.6 45 1.3 88 3.1 35 .79 20 .48 8 30 .97 40 1.2 40 1.2 62 1.6 30 .68 20 .48 9 25 .81 35 1.0 35 1.0 60 1.6 25 .56 20 .48 10 20 .65 30 .89 35 1.0 60 1.6 25 .56 25 .64 11 20 .65 30 .89 35 • 95 60 1.6 30 .69 22 .54 12 30 1.1 144 5.2 33 .98 60 1.5 30 .67 20 .48 13 35 1.1 78 2.5 30 .81 50 1.3 35 .81 60 1.8 14 40 1.3 64 1.9 35 1.0 40 .97 30 .68 35 1.0 15 50 1.8 56 1.7 50 1.5 50 1-3 30 .69 28 .75 16 60 2.1 138 5.6 45 1.3 63 1.5 30 .70 25 .63 17 65 2.5 100 3.5 40 1.2 60 1.5 30 .68 19 .49 18 60 2.1 82 2.9 35 .95 60 1.5 30 .67 16 .41 19 50 1.6 80 2.6 32 .86 60 1.4 29 .66 12 .30 20 50 1.6 70 2.3 35 1.0 60 1.4 30 .69 10 .25 21 50 1.6 60 1.9 35 .95 60 1.4 25 .55 10 .24 22 45 1.5 52 1.7 35 .95 65 1.6 30 .71 10 .24 23 40 1.2 50 1.5 30 .81 65 1.5 30 • 70 10 .24 24 37 - 1.1 45 1.3 30 .79 68 1.6 35 1.1 10 .24 25 35 1.0 40 1.2 40 1.2 60 1.4 30 .78 10 .24 26 35 1.0 50 1.6 32 .86 50 1.2 26 .62 10 .24 27 30 .89 70 2.3 30 .79 57 1.7 24 .58 10 .24 28 30 .89 60 1.8 30 .76 50 1.2 22 .50 20 .49 29 25 .74 54 1.6 30 .81 40 .97 36 .93 100 2.6 30 25 .74 55 1.6 30 .79 40 .95 30 .76 180 8.7 31 —— —— 1700 251 —— 30 • 71 14 .34 —— —— TOTAL 39-21 314.01 38.56 45.26 22.35 26.67 274 G4RVIN BROOK BASIN 05378235 GARVIN BROOK NEAR MINNESOTA CITY, MN LOCATION.—Lat 44°04'l6", long 91°45'51", In SEJNE4 sec. 15, T.107 N., R.8 W., Winona County, Hydrologic Unit 07040003, on left bank, 20 ft (6.1 m) downstream from County 23 bridge, 1.8 ml (2.9 km) south of Minnesota City, and 2.3 mi (3-7 km) upstream from Rollingstone Creek. WATER-DISCHARGE RECORDS PERIOD OP RECORD.—March 1982 to September 1982. GAGE.—Water-stage recorder. REMARKS.—Records good. EXTREMES FOR CURRENT PERIOD.—March to September 1982: Maximum discharge during period, 212 ft 3 /s (6.00 m 3/s) May 31, gage height, 2.33 ft (0.710 m); minimum discharge, 15 ft^/s (0.42 nH/ s ) Mar. 9, gage height, 0.75 ft (0.229 m), result of freezeup.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES

DAY OCT NOV DEC JAN FEU MAR APR MAY JUN JUL AUG SEP 1 26 35 30 36 29 28 36 2 26 36 30 34 28 28 28 3 26 36 31 33 29 28 27 4 26 34 31 33 28 28 26 5 25 34 39 32 28 28 27 6 26 33 40 33 31 28 • 27 7 26 33 37 35 46 27 26 8 28 33 34 34 30 27 26 9 25 34 33 34 30 26 26 10 27 34 33 34 30 27 28 11 26 34 32 33 30 27 27 12 28 33 37 32 29 26 26 13 33 33 41 30 29 27 29 14 34 32 35 30 29 28 28 15 33 33 34 31 29 28 27 16 51 34 35 30 28 27 27 17 41 36 36 30 28 27 27 18 37 34 38 30 28 27 27 19 39 34 35 29 27 27 27 20 35 34 34 30 27 27 25 21 34 33 33 30 27 26 25 22 33 31 35 29 27 28 25 23 36 32 34 29 27 27 25 24 38 32 33 29 27 35 25 25 36 32 32 30 27 30 25 26 34 32 33 29 27 28 25 27 33 31 34 29 33 26 25 28 33 42 33 29 29 26 25 29 33 26 32 29 28 28 27 30 40 23 32 29 28 28 40 31 38 -— 84 28 27 —— TOTAL 1006 993 1110 935 901 855 814 MEAN 32.5 33.1 35.8 31.2 29.1 27.6 27.1 MAX 51 42 84 36 46 35 40 MIN 25 23 30 29 27 26 25 GARVIM BROOK BASIN 2?5 05378235 GARVIN BROOK NEAR MINNESOTA CITY, MN—Continued WATER-QUALITY RECORDS PERIOD OP RECORD.—March 1982 to September 1982. PtSRIOD OP DAILY RECORD.— SUSPENDED-SEDIMENT DISCHARGE.—March 1982 to September 1982. REMARKS.--Suspended-sediment samples were collected weekly and supplemented by stage activated automatic sampler plus extra samples during periods of higher runoff, and daily sediment load was estimated based on water records and available sediment samples. COOPERATON.—Minnesota Pollution Control Agency EXTREMES FOR CURRENT PERIOD.—March to September 1982: SEDIMENT CONCENTRATIONS: Maximum daily mean during period, 1,150 mg/L May 31; minimum daily mean, 15 mg/L Apr. 10-12. SEDIMENT LOADS: Maximum daily mean during period, 302 tons (27** tonnes) May 31; minimum daily mean, 1.3 tons (1.2 tonnes) Apr. 12.

SUSPENDED-SEDIMENT, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

MEAN MEAN MEAN MEAN MEAN MEAN CONCEN­ CONCEN- CONCEN- CONCEN- CONCEN- CONCEN­ TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS DAY (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) 'OBER NOVEMBER DE ;MBER JANUARY PEFEBRUARY MARCH 1 30 2.1 2 30 2.1 3 30 2.1 4 30 2.1 5 30 2.0 6 30 2.1 7 30 2.1 8 30 2.3 9 30 2.0 10 30 2.2 11 30 2.1 12 41 3.1 13 42 3.7 14 38 3.5 15 22 2.0 16 148 22 17 80 8.9 18 59 5.9 19 59 6.2 20 37 3.5 21 35 3.2 22 35 3.1 23 43 4.2 24 54 5.5 25 41 4.0 26 37 3.4 27 37 3.3 28 36 3.2 29 35 3.1 30 58 6.3 31 53 5.4 TOTAL 126.7 276 GARVIN BROOK BASIN 05378235 GARVIN BROOK NEAR MINNESOTA CITY, MN—Continued SUSPEHDED-SEDIMENT, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN MEAN MEAN MEAN MEAN MEAN CONCEN­ CONCEN­ CONCEN­ CONCEN­ CONCEN­ CONCEN­ TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS DAY (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) APRIL MAY JUNE JULY AUGUST SEPTEMBER 39 3-7 33 2.7 132 13 50 3-9 58 4.4 308 29 38 3.7 32 2.6 86 7-9 50 3.8 54 4.1 68 5.1 43 4.2 32 2.7 80 7.1 50 3.9 50 3.8 65 4.7 40 3-7 33 2.8 78 6.9 50 3.8 47 3.6 62 4.4 36 3.3 90 9.5 76 6.6 50 3.8 44 3.3 58 4.2 32 2.9 70 7.6 74 6.6 228 25 43 3.3 55 4.0 28 2.5 44 4.4 72 6.8 362 60 42 3.1 52 3.7 23 2.0 42 3.9 70 6.4 83 6.7 39 2.8 49 3.4 18 1.7 42 3.7 83 7.6 76 6.2 38 2.7 46 3.2 10 15 1.4 42 3.7 84 7.7 72 5.8 37 2.7 43 3.3 11 15 1.4 42 3.6 85 7.6 67 5.4 36 2.6 39 2.8 12 15 1.3 132 14 84 7.3 62 4.9 34 2.4 37 2.6 13 16 1.4 , 120 14 79 6.4 58 4.5 32 2.3 35 2.7 14 16 1.4 67 6.3 76 6.2 57 4.5 31 2.3 32 2.4 15 24 2.1 66 6.1 72 6.0 85 6.7 30 2.3 31 2.3 16 40 3.7 68 6.4 67 5.4 126 9.5 30 2.2 33 2.4 17 53 5.2 84 8.2 63 5.1 109 8.2 30 2.2 36 2.6 18 51 4.7 86 8.8 58 4.7 91 6.9 30 2.2 38 2.8 19 49 4.5 74 7.0 52 4.1 85 6.2 30 2.2 37 2.7 20 48 4.4 71 6.5 50 4.1 83 6.1 30 2.2 34 2.3 21 47 4.2 74 6.6 50 4.1 82 6.0 30 2.1 32 2.2 22 45 3.8 142 13 50 3.9 80 5.8 30 2.3 29 2.0 23 43 3.7 75 6.9 50 3.9 78 5.7 30 2.2 26 1.8 24 41 3.5 65 5.8 52 4.1 81 5.9 153 17 23 1.6 25 39 3.4 65 5.6 74 6.0 80 5.8 109 8.8 26 1.8 26 38 3.3 71 6.3 131 10 74 5.4 85 6.4 33 2.2 27 36 3.0 76 7.0 105 8.2 104 9.3 75 5.3 40 2.7 28 72 11 63 5.6 78 6.1 68 5.3 68 4.8 45 3.0 29 63 4.4 56 4.8 63 4.9 66 5.0 74 5.6 47 3.4 30 47 2.9 60 5.2 52 4.1 64 4.8 50 3.8 223 27 31 —— —— 1150 302 —— 62 4.7 22 1.6 —— —— TOTAL —— 102.4 —— 493.3 —— 188.8 —— 249.5 —— 116.6 —— 138.3

SEDI­ SED. SED. SED. SED. BED BED BED MENT, SUSP. SUSP. SUSP. SUSP. MAT. MAT. MAT. STREAM- SEDI­ DIS­ PALL FALL FALL SIEVE SIEVE SIEVE SIEVE PLOW, MENT, CHARGE, DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. INSTAN­ TEMPER­ SUS­ SUS­ % FINER % FINER % FINER % FINER % FINER % FINER % FINER TANEOUS ATURE PENDED PENDED THAN THAN THAN THAN THAN THAN THAN DATE (CPS) (DEG C) (MG/L) (T/DAY) .002 MM .004 MM .016 MM .062 MM 1.00 MM 2.00 MM 4.00 MM (00061) (00010) (80154) (80155) (70337) (70338) (703^0) (7033D (80168) (80169) (80170) MAY 31... 109 17.0 1430 421 68 83 90 100 — — — 31... 92 17.0 1270 315 69 83 92 100 — — — JUL 06... 42 21.0 1630 185 31 37 59 99 — — — SEP 15... 27 — — — — — — — 97 99 100 277 GARVIN BROOK BASIN 05378300 STRAIGHT VALLEY CREEK NEAR ROLLINGSTONE, MN LOCATION. — Lat 44°05'09", long 91°50'34", in SEJNEi sec. 12, T.107 N., R.9 W., Winona County, Hydrologic Unit 07040003, at bridge on County Highway, 0.2 mi (0.3 km) above mouth, and 1.5 mi (2.4 km) southwest of Rollingstone . DRAINAGE AREA.— 5-16 mi 2 (13-36 km 2 ). PERIOD OP RECORD. — Water years 1959-66 (annual maxitnums) , 1967-70 (peaks above base), October 1970 to current year. GAGE. — Water-stage recorder and crest-stage gage. Datura of gage is 723.85 ft (220.629 m) National Geodetic Vertical Datum of 1929. Nov. 6, 1958, to Oct. 20, 1966, crest-stage gage at present site and datum. REMARKS. — Records good. AVERAGE DISCHARGE. — 12 years (water years 1971-82), 2.36 ft 3/s (0.067 m3 /s), 6.21 in/yr (158 mm/yr). EXTREMES FOR PERIOD OP RECORD. — Maximum discharge, 1,500 ft^/s (42.5 m3/ s ) July 5, 1978, gage height, 18.10 ft (5.517 m) from high-water mark in well; minimum observed, 0.12 ft^/s (0.003 mVs) Aug. 5, I960. EXTREMES FOR CURRENT YEAR .—Maximum discharge, 22 ft3/ s (0.62 mVs May 31, gage height, 10.37 ft (3.222 m), no peak above base of 100 ft 3 /s (2.83 nP/s); minimum discharge, 0.99 ft 3 /s (0.028 mVs) Jan. 21, gage height, 9.63 ft (2.935 m).

DISCHARGE, IN CUBIC PEEP PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 1.7 1.7 2.1 1.6 1.1 1.4 2.2 2.0 2.3 1.4 2.2 4.9 2 1.7 1.7 2.0 1.6 1.1 1.4 2.3 2.0 2.2 1.4 2.2 1.7 3 1.9 1.7 2.0 1.6 1.1 1.4 2.4 2.0 2.0 1.5 2.4 1.6 4 1.9 1.7 1.9 1.6 1.1 1.3 2.2 2.3 1.9 1.4 2.3 1.5 5 2.3 1.8 1.9 1.5 1.1 1.2 2.1 3.1 1.9 1.4 2.2 1.5 6 1.8 1.8 2.0 1.5 1.1 1.2 2.0 3.0 1.8 2.1 2.2 1.5 7 1.7 1.8 2.0 1.4 1.1 1.2 2.0 2.5 1.8 1.7 2.1 1.4 8 1.6 1.8 1.9 1.4 1.1 1.2 2.0 2.4 1.8 1.6 1.9 1.4 9 1.4 1.7 1.9 1.4 1.1 1.1 2.0 2.3 1.7 1.7 1.8 1.4 10 1.4 1.7 1.8 1.4 1.1 1.2 2.0 2.2 1.7 1.8 1.7 1.8 11 1.3 1.7 1.8 1.4 1.1 1.4 1.9 2.5 1.7 1.9 1.6 1.5 12 1.3 1.7 1.9 1.4 1.1 2.0 2.0 5.1 1.7 1.8 1.5 2.0 13 1.4 1.7 1.9 1.4 1.2 2.9 1.9 4.6 1.7 1.8 1.5 2.7 14 2.3 1.9 1.9 1.4 1.3 2.4 2.0 3.1 2.0 1.8 1.5 1.8 15 1.8 1.9 1.8 1.3 1.5 2.1 2.1 2.9 1.8 1.9 1.5 1.8 16 1.7 1.8 1.7 1.3 1.6 5.2 2.5 3.0 1.7 1.9 1.5 1.6 17 2.0 1.8 1.7 1.3 1.8 2.8 2.7 3.0 1.6 1.9 1.5 1.7 18 2.2 1.8 1.5 1.3 1.9 3.5 2.4 2.8 1.6 1.9 1.5 1.6 19 1.9 2.0 1.5 1.3 1.7 2.7 2.4 2.7 1.6 1.8 1.5 1.5 20 1.9 1.9 1.5 1.3 1.6 2.4 2.4 2.5 1.6 1.9 1.6 1.4 21 1.9 1.8 1.6 1.5 1.6 2.3 2.2 2.5 1.6 2.0 1.7 1.4 22 1.8 1.8 1.6 1.4 1.6 2.5 2.1 2.5 1.6 2.1 1.9 1.4 23 1.8 1.9 1.5 1.2 1.6 3.4 2.1 2.3 1.6 2.2 2.2 1.4 24 1.8 1.8 1.5 1.2 1.6 3.1 2.1 2.3 1.5 2.2 4.0 1.4 25 1.8 2.0 1.6 1.2 1.5 2.4 2.1 2.2 1.6 2.3 2.3 1.4 26 1.8 2.2 1.7 1.2 1.5 2.2 2.1 2.5 1.6 2.3 1.9 1.4 27 1.7 2.0 1.7 1.2 1.4 2.1 2.0 2.5 1.5 2.6 1.8 1.3 28 1.7 1.9 1.6 1.2 1.4 2.1 2.0 2.3 1.4 2.2 1.8 1.4 29 1.8 1.9 1.6 1.2 —— 2.2 2.0 2.2 1.6 2.3 1.7 1.8 30 1.8 1.9 1.6 1.2 —— 3.1 2.0 2.2 1.4 2.3 1.6 2.4 31 1.8 —— 1.6 1.2 —— 2.5 —— 4.4 —— 2.1 1.4 —— TOTAL 54.9 54.8 54.3 42.1 38.0 67-9 64.2 83.9 51.5 59-2 58.5 51.6 MEAN 1.77 1.83 1.75 1.36 1.36 2.19 2.14 2.71 1.72 1.91 1.89 1.72 MAX 2.3 2.2 2.1 1.6 1.9 5.2 2.7 5.1 2.3 2.6 4.0 4.9 MIN 1.3 1.7 1.5 1.2 1.1 1.1 1.9 2.0 1.4 1.4 1.4 1.3 CFSM .34 .36 .34 .26 .26 .42 .42 .53 .33 .37 .37 .33 IN. .40 .39 .39 .30 .27 .49 .46 .60 .37 .43 .42 .37 GAL YR 1981 TOTAL 785.43 MEAN 2.15 MAX 27 MIN .62 CFSM .42 IN 5.66 WTR YR 1982 TOTAL 680.90 MEAN 1.87 MAX 5.2 MIN 1.1 CFSM .36 IN 4.91 278 MISSISSIPPI RIVER MAIN STEM 05378500 MISSISSIPPI RIVER AT WINONA, MN LOCATION.—Lat 44°03'21", long 91°38'l6", in sec.23, T.107 N., R.7 W., Winona County, Hydrologic Unit 07040003, on right bank at Winona pumping station in Winona, 9.5 mi (15-3 km) upstream from Trempealeau River, and at mile 725.7 (1,167.7 km) upstream from the Ohio River. DRAINAGE AREA.—59,200 mi 2 (153,300 km 2 ), approximately. WATER-DISCHARGE RECORDS PERIOD OP RECORD.—June 1928 to current year. Gage-height records collected in this vicinity since 1878 are contained in reports of Mississippi River Commission. GAGE.—Water-stage recorder. Datum of gage is 639.64 ft (194.962 m) National Geodetic Vertical Hatum of 1929. June 10, 1928, to Apr. 15, 1931, nonrecording gage at site 800 ft (244 m) upstream. Prior to Oct. 1, 1929, at datum 0.20 ft (0.06 rn) higher and Oct. 1, 1929, to Apr. 15, 1931, at datum 0.12 ft (0.04 m) lower. Apr. 16, 1931, to Nov. 12, 1934, nonrecording gage at present site and datum. Since Mar. 31, 1937, auxiliary water-stage recorder 2.7 mi (4.3 km) upstream at tailwater of navigation dam 5A. REMARKS.—Records good. Some regulation by reservoirs, navigation dams, and powerplants at low an1 medium stages. Flood flow not materially affected by artificial storage. AVERAGE DISCHARGE.—54 years, 26,520 ft3 /s (751.0 m3 /s), 6.08 in/yr (154 mm/yr). EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 268,000 ft3/s (7,590 m3/s) Apr. 19, 1965, gage height, 20.77 ft (6.331 m) from floodmark; minimum, 1,940 ft3 /s (54.9 m3/s) Dec. 12, 1980, gage height, 3-96 ft (1.207 m) result of ice jam; minimum gage height, -3.38 ft (-1.030 m) Aug. 31, 1934 (prior to dam construction in 1936); minimum gage height since 1938, after completion of dam, 1.95 ft (0.594 m) Jan. 27, 1944. EXTREMES OUTSIDE PERIOD OF RECORD.—Flood of June 18, 1880, reached an elevation of 657.14 ft (200.296 m), discharge, 172,000 ft 3 /s (4,870 rtH/s), from information by Corps of Engineers. EXTREMES FOR CURRENT YEAR.--Maximum discharge, 138,000 ft3/ s (3,910 m3/ s ) Apr. 23, gage heignt 14.57 ft (4.441 m); minimum daily, 12,000 ft 3 /s (340 m 3/s) Oct. 1; minimum recorded gage height, 4.77 ft (1.454 n) Dec. 17.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY .TUN JUL AUQ SEP 1 12000 37700 22600 19100 16000 17400 58900 87200 64100 25100 18700 18100 2 13700 35800 23200 19100 15800 17600 63400 80500 62400 24500 19300 23700 3 14900 33500 23400 19100 15700 17200 68200 74700 62000 23500 19400 23700 4 18500 32400 23100 18900 15300 16300 75700 70900 59400 23200 19600 21200 5 21800 31600 22900 18700 15200 16300 88800 68900 58200 22100 20000 18900 6 22600 31000 20600 17400 14700 17300 96900 67400 55400 20400 18700 17000 7 22800 29800 19400 17300 14900 17400 103000 65000 53200 19800 17500 17500 8 26300 28500 20500 17200 15000 17400 107000 64400 53000 20100 16300 18400 9 27900 27900 21500 16700 15300 18600 106000 66100 49600 20400 15200 17700 10 28800 26100 21700 16800 15300 18300 103000 68400 44700 22900 13800 18300 11 28900 24300 20900 16800 15300 18100 99100 70400 42900 24700 13000 19500 12 25600 23800 18600 16700 15300 19200 94500 71400 41000 26000 12700 21600 13 24700 24400 18000 15900 15300 19500 91400 70500 39600 27500 13500 23300 14 25800 24600 19300 15100 15300 19800 88700 70100 36300 27700 13900 28500 15 28700 24600 17200 15700 15400 21500 85700 69100 34400 28500 14600 31600 16 29000 25800 14000 15900 15400 22400 84300 69200 33000 29400 14400 33300 17 28500 24700 12900 16000 15900 28000 86300 70200 32000 29900 14400 35300 18 31100 23600 14000 16400 16300 28900 89800 72700 32200 30100 14300 38000 19 31800 23900 15300 16100 16300 29900 98700 74000 32000 29900 14200 35000 20 34400 24200 14600 16100 17600 30900 114000 74300 29600 28600 13600 35300 21 38800 24000 13800 16100 17400 32800 129000 75100 28300 27200 13600 35500 22 42100 22600 13400 16100 18100 34000 137000 76000 27300 28000 12100 33900 23 42400 21800 13900 16000 17700 34400 137000 76800 27000 28300 13100 31200 24 42300 22000 15000 16100 17600 35600 131000 77300 26800 26500 12300 30300 25 42400 21500 15500 16000 17600 41700 124000 76800 27200 25000 16200 29000 26 41100 21100 17000 16000 17600 51700 116000 75300 26600 24000 18200 27300 27 39500 22100 18600 15900 17500 53500 110000 73900 25700 24400 17500 22700 28 38600 23800 19700 15900 17500 50700 104000 72500 25200 24200 16100 21200 29 37200 24000 19500 15900 ___ 49700 98200 70800 21800 24100 14900 16800 30 36200 22700 19200 16000 _ — 49500 92900 68500 25100 21700 13700 18000 31 37700 —— 19100 16000 —— 51100 67200 —— 19800 14600 TOTAL 936100 783800 568400 517000 452300 896700 2982500 2235600 1179000 777500 479400 761800 MEAN 30200 26130 18340 16680 16150 28930 99420 72120 39300 25080 15460 25390 MAX 42400 37700 23400 19100 18100 53500 137000 87200 64100 30100 20000 38000 MIN 12000 21100 12900 15100 14700 16300 58900 64400 24800 19800 12100 16800 CFSM .51 .44 .31 .28 .27 .49 1.68 1.22 .66 .42 .26 .43 IN. .59 .49 .36 .32 .28 .56 1.87 1-40 .74 .49 .30 .48 CAL YR 1981 TOTAL 9697120 MEAN 26570 MAX 69300 MIN 8330 CFSM 45 IN 6.09 WTR YR 1982 TOTAL 12570100 MEAN 34440 MAX 137000 MIN 12000 CFSM 58 IN 7.90 279 MISSISSIPPI RIVER MAIN STEM 05378500 MISSISSIPPI RIVER AT WINONA, UN—Continued (National stream-quality accounting network station)

WATER-QUALITY RECORDS PERIOD OP RECORD.--Water years 1964 to current year. PERIOD OP DAILY RECORD.— SPECIPIC CONDUCTANCE: May 1980 to current year. WATER TEMPERATURES: October 1975 to current year. SUSPENDED-SEDIMENT DISCHARGE: September 1975 to current year. REMARKS.--For the winter period, daily sediment loads were estimated on the basis of water records and weekly sediment samples. Water temperature and specific conductance were obtained once daily during most of the open water period and weekly during the winter period. Letter K indicates a non-ideal colony count.

EXTREMES FOR PERIOD OP DAILY RECORD.— SPECIPIC CONDUCTANCE: Maximum daily, 480 micromhos, Peb. 23, 1982; minimum daily, ISO micrornhos Sept. 24, 1980, May 9, 1981. WATER TEMPERATURES: Maximum daily, 29.0°C July 10, 1976; minimum daily, 0.0°C many days each year. SEDIMENT CONCENTRATIONS: Maximum daily mean, 393 mg/L July 2, 1978; minimum daily mean, 1 mg/L many days during several years. SEDIMENT LOADS: Maximum daily 65,300 tons (59,200 tonnes) July 2, 1978; minimum daily, 19 tons (17 tonnes) Dec. 12, 1980. EXTREMES POR CURRENT YEAR.— SPECIPIC CONDUCTANCE: Maximum daily, 480 micromhos Peb. 23; minimum daily, 280 micromhos Sept. 18. WATER TEMPERATURES: Maximum daily, 27.0°C July 4, 5; minimum daily, 0.0°C on many days during winter period. SEDIMENT CONCENTRATIONS: Maximum daily mean, 262 mg/L Apr. 4; minimum daily mean, 2 mg/L Feb. 8-19, Mar. 6-10. SEDIMENT LOADS: Maximum daily, 53,600 tons (48,600 tonnes) Apr. 4; minimum daily, 81 tons (73 tonnes) Peb. 8.

WATER QUALITY DATA, iVATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 DIS­ SPE­ BARO­ CHARGE, SPE­ CIFIC METRIC IN STREAM- CIPIC CON­ PRES­ CUBIC PLOW, CON- DUCT­ TEMPER­ SURE FEET INSTAN- DUCT- ANCE PH PH ATURE, TEMPER- (MM TIME PER TANEOUS ANCE LAB LAB AIR ATURE OP DATE SECOND (CFS) (UMHOS) (UMHOS) (UNITS) (UNITS) (DEG C) (DEG C) HG) (00060) (00061) (00095) (90095) (00400) (00403) (00020) (00010) (00025) OCT 06. ., 1530 22800 435 8.2 13.0 758 JAN 05..- 1400 18700 '105 389 8.0 -6.0 .0 MAR 25.. 1200 41100 410 389 7-7 1.0 1.0 748 APR 28.. 1030 104000 325 301 7.5 13.0 11.5 746 JUL 28.. 1300 24100 370 378 8.0 24.5 26.0 751 SEP 1600 28500 350 357 7.8 15.5 20.0 752

OXYGEN, COLI- STREP­ HARD­ DIS- FORM, TOCOCCI NESS MAGNE­ SOLVED FECAL, FECAL, HARD­ NONCAR- CALCIUM SIUM, SODIUM, TUR­ OXYGEN, (PER­ 0.7 KF AGAR NESS BONATE DIS­ DIS­ DIS­ BID­ DIS­ CENT UM-MP (COLS. (MG/L (MG/L SOLVED SOLVED SOLVED ITY SOLVED SATUR­ (COLS./ PER AS AS (MG/L (MG/L (MG/L DATE (NTU) (MG/L) ATION) 100 ML) 100 ML) CAC03) CAC03) AS CA) AS MG) AS NA) (00076) (00300) (00301) (31625) (31673) (00900) (95902) (00915) (00925) (00930) OCT 06. . 11 66 190 190 54 48 18 9-7 J.AN 05..^ 2.1 13.7 94 110 K100 180 20 44 17 11 MAR 25... 12 12.6 90 50 K1600 170 21 42 16 12 APR 28.. 4.8 11.4 107 K12 45 140 37 35 12 5.2 JUL 28.., 4.9 8.0 100 78 170 28 42 16 9-0 SEP 14.. 7.9 7.2 740 1400 170 25 40 16 10 280 MISSISSIPPI RIVER MAIN STEM 05378500 MISSISSIPPI RIVER AT WINONA, MN--Continued WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SOLIDS, SOLIDS, SODIUM POTAS­ ALKA­ CHLO­ PLUO- SILICA, RESIDUE SUM OP AD­ SIUM, LINITY SULPATE RIDE, RIDE, DIS­ AT 180 CONSTI­ SORP­ DIS­ LAB DIS­ DIS­ DIS­ SOLVED DEG. C TUENTS , TION SOLVED (MG/L SOLVED SOLVED SOLVED (MG/L DIS­ DIS­ RATIO (MG/L AS (MG/L (MG/L (MG/L AS SOLVED SOLVED DATE AS K) CAC03) AS SO 4) AS CL) AS- P) SI02) (MG/L) (MG/L) (0093D (00935) (90410) (00945) (00940) (00950) (00955) (70300) (70301) OCT 06... .3 2.3 140 21 28 .2 12 230 223 JAN 05... .1) 1.9 160 28 13 .2 10 255 222 MAR 25... .4 3.0 150 24 15 .2 12 236 215 APR 28... .2 2.8 100 31 9.3 .2 8.8 208 165 JUL 28... .3 2.0 143 27 12 .2 11 254 205 SEP 14. .. .3 2.1 141 28 11 .2 11 196 203

NITRO­ NITRO­ NITRO­ PHOS­ SED. SOLIDS, GEN, GEN, GEN, AM­ PHOS­ PHORUS , SUSP. DIS­ N02+N03 AMMONIA MONIA + PHOS­ PHORUS, ORTHO, SEDI­ SIEVE SOLVED DIS­ DIS­ ORGANIC PHORUS, DIS­ DIS­ MENT, DIAM. (TONS SOLVED SOLVED TOTAL TOTAL SOLVED SOLVED SUS­ % FINER PER (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L PENDED THAN DATE DAY) AS N) AS N) AS N) AS P) AS P) AS P) (MG/L) .062 MM (70302) (0063D (00608) (00625) (00665) (00666) (00671) (80154) (7033D OCT 06... 14200 1.7 .040 .77 .150 .100 .090 — — JAN 05... 12900 1.6 .270 • 98 .070 .050 .050 — — MAR 25... 26200 1.2 .200 1.30 .150 .150 .110 — — APR 28... 58400 1.7 .010 .67 .120 .040 .020 28 77 JUL 28... 16500 1.1 .060 .90 .170 .100 .100 20 88 SEP 14... 15100 .74 .040 .70 .180 .140 .100 25 95

CHRO­ BARIUM, CADMIUM MIUM, CHRO­ COBALT, ARSENIC TOTAL BARIUM, TOTAL CADMIUM TOTAL MIUM, TOTAL ARSENIC DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ TOTAL SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS AS) AS AS) AS BA) AS BA) AS CD) AS CD) AS CR) AS CR) AS CO) (01002) (01000) (01007) (01005) (01027) (01025) (01034) (01030) (01037) JAN 05... 1400 1 1 100 41

MANGA­ COPPER, IRON, LEAD, NESE, MANGA­ MERCURY COBALT, TOTAL COPPER, TOTAL IRON, TOTAL LEAD, TOTAL NESE, TOTAL DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ DIS­ RECOV­ SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE SOLVED ERABLE (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L DATE AS CO) AS CU) AS CU) AS FE) AS PE) AS PB) AS PB) AS MN) AS MN) AS HG) (01035) (01042) (01040) (01045) (01046) (01051) (01049) (01055) (01056) (71900) JAN 05...

<.l 6 3 <1 <1 <1 <1 40 9 <.l 5 4 <1 <1 <1 <1 10 5 • 3 5 1 <1 <1 <1 <1 10 <12 <.l 7 4 <1 <1 <1 <1 40 8

SPECIFIC CONDUCTANCE (MICROMHOS/CM AT 25 DEO. C), WATER YEAR OCTOBER ig8l TO SEPTEMBER 1982 ONCE-DAILY

DAY OCT NOV DEC JAN MAR APR MAY -TUL AUO SEP 1 420 350 340 ___ 400 330 380 455 390 380 2 420 340 350 430 400 360 340 380 455 380 370 3 420 350 350 —— 360 350 390 455 380 360 4 420 350 350 360 350 390 455 370 370 5 390 340 350 400 —— 340 350 400 460 365 380 6 380 340 350 __ 350 350 400 460 370 380 7 380 340 350 ___ 360 350 410 455 365 380 8 390 350 350 ___ 380 340 420 455 370 380 9 380 360 360 430 400 400 340 410 445 370 370 10 370 360 360 —— 390 320 420 440 380 360 11 380 360 360 _ _ 390 310 420 440 380 360 12 400 360 360 —— 390 320 430 440 390 360 13 400 360 360 440 370 320 440 440 400 340 14 400 350 360 —— 380 320 440 450 400 360 15 390 350 —— —— 360 320 420 440 390 350 16 380 350 __ 430 400 360 320 445 420 395 335 17 380 360 400 350 315 440 410 390 300 18 380 360 —— 400 340 315 430 440 395 280 19 380 360 440 400 320 325 430 420 390 290 20 380 360 —— 400 320 320 430 400 400 320 21 370 340 __ 400 320 320 440 400 395 330 22 340 350 400 340 340 460 340 390 330 23 350 350 —— 480 400 340 340 460 390 390 340 24 350 350 —— 400 340 345 450 380 380 335 25 360 350 —— 400 340 345 450 380 380 340 26 380 350 _ _ 410 310 345 450 380 390 340 27 380 340 ___ 450 410 320 360 455 380 380 340 28 360 340 ___ 410 320 360 455 380 380 340 29 370 340 360 420 320 370 450 380 390 340 30 360 340 —— 430 320 370 460 370 390 325 31 340 ___ —— 420 ___ 380 —— 380 380 —— MEAN 381 350 352 338 429 419 384 346 WTR YR 1982 MAX 480 MIN 280 MISSISSIPPI RIVER MAIN STEM 05378500 MISSISSIPPI RIVER AT WINONA, MN — Continued TEMPERATURE, WATER (DEG. C 1 , WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 ONCE-DAILY

DAY OCT NOV DEC JAN PEM MAR APR MAY JUN JUL AUG SEP 1 13.0 10.0 _ _ 3.0 11.0 17-0 21.0 24.0 19.0 2 12.0 10.0 .0 4.0 12.0 17.0 22.0 25.0 20.0 3 11.0 9.0 ___ 3.0 13-0 17.0 21.0 26.0 19.0 4 10.0 10.0 2.0 15.0 17.0 27.0 25.5 18.0 5 11.0 10.0 1.0 .0 —— 2.0 15.0 17.0 27.0 26.0 19.0 6 11.0 8.0 1.0 1.0 13-0 17.0 25.0 25.0 18.0 7 11.0 7.0 2.0 —— 1.5 12.0 17-0 25.0 25.0 18.0 8 11.0 7.0 —— 1.5 13.0 19.0 25.0 25.0 18.0 9 11.0 6.0 .0 .0 2.0 14.0 19.0 24.0 23.0 19-0 10 11.0 6.0 — 2.0 15.0 17.5 26.0 21.0 20.0 11 11.0 6.0 _ 2.0 17.0 18.5 26.0 21.0 21.0 12 12.0 6.0 3.0 16.0 19.0 26.0 20.0 21.0 13 13.0 6.0 .0 —— 4.0 16.0 19.0 24.0 21.0 20.0 It 14.0 7.0 1.0 5.0 17.5 19.0 24.0 21.0 19.0 15 12.0 7.0 — 6.0 17.5 19.0 25.0 22.0 17.0 16 12.0 8.0 1.0 6.5 18.0 18.0 25.0 23.0 16.0 17 12.0 7.0 .0 5.0 18.0 19.0 25.0 23.0 16.0 18 12.0 6.0 2.0 6.0 18.0 18.0 26.0 25.0 15.0 19 11.0 6.0 .0 1.0 6.0 18.0 18.0 25.0 25.0 16.0 20 10.0 5.0 1.0 5.0 18.0 18.0 24.0 25.0 15.0 21 9.0 4.0 1.0 6.0 17.0 18.0 24.0 23.0 13.0 22 9.0 4.0 1.0 7.0 15.0 18.0 24.0 23.0 14.0 23 7.0 4.0 1.0 9.0 15.0 19.0 24.0 23.0 15.0 24 7.0 3.0 2.0 10.0 16.0 20.0 25.0 22.0 16.0 25 6.0 3.0 1.0 11.0 18.0 19-0 25.0 22.0 15.0 26 6.0 4.0 1.0 10.0 17.0 18.0 25.0 22.0 14.0 27 6.0 4.0 1.0 9.0 17.0 18.0 24.0 20.0 15.0 28 8.0 3.0 1.0 10.0 18.0 24.0 25.0 20.0 15.0 29 8.0 3.0 2.0 11.0 18.5 21.0 24.0 19.0 16.0 30 9.0 3.0 4.0 11.0 19.0 22.0 23.0 19.0 16.5 31 10.0 —— 5.0 —— 19-0 —— 23.0 19.0 —— MEAN 10.0 6.0 16.0 18.5 24.5 17.0 WTR YR 1982 MAX 27.0 MIN

SEDI- SED. MENT, SUSP, STREAM- SEDI- DIS- SIEVE PLOW, MENT, CHARGE, DIAM t INSTAN­ TEMPER­ SUS- SUS- % FINER TANEOUS ATURE PENDED PENDED THAN DATE (CPS) (DEG C) (MG/L) (T/DAY) .062 Mlffl (00061) (00010) (80154) (80155) (70331) OCT 06... 22800 13.0 JAN 05... — .0 MAR 25... 41100 1.0 APR 28... 104000 11.5 28 7860 77 JUL 28... 24100 26.0 20 1300 SEP 14. .. — 20.0 25 283 MISSISSIPPI RIVER MAIN STEM 05378500 MISSISSIPPI RIVER AT WINONA, MN—Continued SUSPENDED-SEDIMENT, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN MEAN MEAN MEAN MEAN MEAN CONCEN­ CONCEN­ CONCEN­ CONCEN­ CONCEN­ CONCEN­ TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS TRATION LOADS DAY (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) (MG/L) (T/DAY) OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH 25 810 17 1730 8 488 4 206 4 173 3 141 19 703 14 1350 10 626 4 206 4 171 3 143 25 1010 14 1270 8 505 4 206 4 170 3 139 17 849 13 1140 7 437 3 153 3 124 3 132 19 1120 12 1020 8 495 3 151 3 123 3 132 24 1460 14 1170 8 445 3 141 3 119 2 93 21 1290 12 966 11 576 3 140 3 121 2 94 23 1630 13 1000 11 609 3 139 2 81 2 94 20 1510 10 753 10 580 4 180 2 83 2 100 10 22 1710 10 705 8 469 4 181 2 83 2 99 11 20 1560 10 656 8 451 4 181 2 83 3 147 12 21 1450 10 643 7 352 4 180 2 83 3 156 13 21 1400 8 527 7 340 4 172 2 83 4 211 IH 19 1320 8 531 7 365 4 163 2 83 4 214 15 20 1550 10 664 7 325 4 170 2 83 5 290 16 21 1640 8 557 7 265 4 172 2 83 5 302 17 23 1770 9 600 7 244 6 259 2 86 7 529 18 29 2440 10 637 7 265 8 354 2 88 10 780 19 23 1970 11 710 7 289 16 696 2 88 11 888 20 26 2410 14 915 7 276 8 348 3 143 13 1080 21 25 2620 13 842 7 261 4 174 3 141 14 1240 22 29 3300 12 732 7 253 4 174 3 147 11 1010 23 36 4120 9 530 7 263 4 173 4 191 11 1020 24 22 2510 10 594 7 283 4 174 4 190 11 1060 25 25 2860 10 580 7 293 4 173 4 190 26 2930 26 18 2000 8 456 7 321 4 173 4 190 42 5860 27 17 1810 12 716 8 402 4 172 3 142 37 5340 28 17 1770 12 771 10 532 4 172 3 142 33 4520 29 20 2010 11 713 12 632 4 172 —— —— 35 4700 30 22 2150 10 613 8 415 4 173 —— —— 55 7350 31 20 2040 —— —— 6 309 4 173 —— —— 72 9930 TOTAL —— 56792 —— 24091 —— 12366 —— 6301 —— 3484 —— 50724

APRIL MAY JUNE JULY AUGUST SEPTEMBER 1 I 3 11600 19 4470 49 8480 19 1290 17 858 18 880 2 84 14400 22 4780 56 9430 20 1320 16 834 22 1410 3 220 40500 19 3830 42 7030 17 1080 17 890 18 1150 4 262 53600 20 3830 32 5130 17 1060 17 900 16 916 5 104 24900 26 4840 32 5030 15 895 16 864 20 1020 6 17500 24 4370 29 4340 15 826 17 858 15 688 7 67¥ 18600 20 3510 29 4170 14 748 15 709 14 661 8 62 17900 16 2780 31 4440 16 868 14 616 14 696 9 60 17200 20 3570 24 3210 14 771 16 657 16 765 10 53 14700 23 4250 25 3020 14 866 12 447 19 939 11 45 12000 21 3990 25 2900 16 1070 16 562 15 790 12 32 8160 21 4050 21 2320 19 1330 12 411 23 1340 13 38 9380 21 4000 22 2350 19 1410 13 474 27 1700 in 30 7180 19 3600 27 2650 18 1350 14 525 26 2000 15 32 7400 23 4290 24 2230 18 1390 16 631 31 2640 16 32 7280 24 4480 22 I960 17 1350 17 661 22 1980 17 42 9790 25 4740 22 1900 15 1210 14 544 21 2000 18 47 11400 34 6670 25 2170 19 1540 12 463 23 2360 19 43 11500 30 5990 22 1900 16 1290 12 460 19 1800 20 46 14200 25 5020 24 1920 17 1310 12 441 20 1910 21 49 17100 22 4460 26 1990 17 1250 16 588 22 2110 22 46 17000 24 4920 22 1620 17 1290 14 457 16 1460 23 40 14800 23 4770 21 1530 19 1450 13 460 15 1260 24 39 13800 23 4800 20 1450 19 1360 12 399 16 1310 25 50 16700 22 4560 18 1320 19 1280 16 700 14 1100 26 24 7520 20 4070 20 1440 18 1170 18 885 19 1400 27 25 7420 23 4590 22 1530 16 1050 15 709 11 674 28 28 7860 21 4110 20 1360 19 1240 13 565 10 572 29 27 7160 19 3630 21 1410 17 1110 20 805 11 499 30 24 6020 22 4070 19 1290 16 937 14 518 15 729 31 —— — - 23 4170 —— 15 802 12 473 —— —— TOTAL —— 444570 —— 135210 —— 91520 —— 35913 —— 19364 —— 38759 AD FOR YEAR: 919094 TONS. 284 ROOT RIVER BASIN 05384000 ROOT RIVER NEAR LANESBORO, MN LOCATION.—Lat 43°44'58", long 91°58'43", in sec.l, T.103 N., R.10 W., Pillmore County, Hydrologic Unit 07040008, on left bank 0.5 mi (0.8 km) upstream from highway bridge, 1.2 mi (1.9 km) upstream from South Branch, and 2.5 mi (4.0 km) northeast of Lanesboro. DRAINAGE AREA.---615 mi 2 (1,593 km 2 ). PERIOD OP RECORD.—February to November 1910, February 1911 to September 1914, July 1915 to September 1917- August 1940 to current year. Published as North Branch Root River near Lanesboro, 1910-17. REVISED RECORDS.—WSP 355= 1912. WSP 1308: 1911(M). GAGE,—Water-stage recorder. Datum of gage is 791.32 ft (241.194 m) National Geodetic Vertical Datum of 1929. Prior to Oct. 1, 1917, nonrecording gage at site 0.5 mi (0.8 km) downstream at datum about 1.5 ft (0.5 m) higher. REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.—47 years (water years 1912-14, 1916-17, 1941-82), 341 ft3/s (9.657 m^/s), 7.53 in/yr (191 mm/yr). EXTREMES FOR PERIOD OF RECORD.—Maximum discharge, 22,100 ft 3/s (626 m3/s) Mar. 29, 1962, gage height, 16.11 ft (4.910 m); maximum gage height, 17.83 ft (5.435 m)' Mar. 1, 1965, from floodmark (backwater from ice); minimum discharge, 29 ft 3 /s (0.82 mVs) Aug. 27, 1949, gage height, 1.08 ft (0.329,m); minimum gage height, 0.42 ft (0.128 m) Dec. 3, 1980. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 3,920 ft 3 /s (111 mVs) May 6, gage height, 7.05 ft (2.149 m), no other peak above base of 3,500 ftVs (99.1 mVs); minimum, 73 ftVs (2.07 mVs) D60 ' 15> gage height, 0.61 ft (0.186 m).

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEE MAR APR MAY JUN JUL AUG SEP 1 226 216 206 153 140 169 1500 412 1630 315 211 365 2 221 215 207 152 140 163 1110 402 1040 304 236 445 3 219 211 202 151 140 160 1460 390 860 299 217 351 4 222 210 178 150 140 159 1550 379 767 291 212 287 5 233 210 168 149 140 160 907 614 694 284 221 259 6 242 208 196 148 140 160 719 2920 646 278 215 254 7 243 207 217 147 140 162 640 2730 615 319 207 243 8 237 207 196 146 140 164 598 1660 580 270 201 230 9 229 201 188 146 140 167 563 1130 552 264 .194 223 10 228 197 147 146 140 170 519 921 532 270 189 224 11 224 195 162 145 140 163 490 793 497 270 187 221 12 219 195 215 144 140 163 481 1050 473 270 185 215 13 214 195 196 143 140 170 560 2330 449 345 183 244 14 219 195 179 143 140 400 684 2070 430 322 182 282 15 236 195 110 142 140 624 681 1440 467 278 182 343 16 223 195 124 141 142 1350 779 1270 460 271 181 303 17 235 193 170 141 146 2260 1450 1260 438 267 177 281 18 257 191 169 140 150 1950 1970 2110 440 281 175 267 19 263 194 168 140 156 2830 1170 1740 414 257 172 254 20 266 195 167 140 160 2220 920 1420 399 246 170 240 21 261 190 166 140 168 1650 807 1080 393 245 165 228 22 250 186 164 140 172 1350 711 1000 378 244 176 218 23 241 194 163 140 176 1290 638 1290 366 244 180 214 24 235 194 161 140 176 2260 612 1100 360 233 196 211 25 235 195 160 140 176 2600 586 900 367 225 226 206 26 236 195 159 140 176 1810 553 820 370 220 224 201 27 232 195 158 140 175 1240 515 855 359 235 200 198 28 229 195 157 140 172 989 478 1360 346 247 189 197 29 225 193 156 140 —— 970 446 1000 338 238 204 198 30 222 187 155 140 —— 1360 426 830 328 226 313 462 31 220 —— 154 140 —— 2000 —— 2000 —— 215 314 —— TOTAL 7242 5949 5318 4447 4245 31283 24523 39276 15988 8273 6284 7864 MEAN 234 198 172 143 152 1009 817 1267 533 267 203 262 MAX 266 216 217 153 176 2830 1970 2920 1630 345 314 462 MIN 214 186 110 140 140 159 426 379 328 215 165 197 CFSM .38 .32 .28 .23 .25 1.64 1.33 2.06 .87 .43 .33 .43 IN. .44 .36 .32 .27 .26 1.89 1.48 2.38 .97 .50 .38 .48 CAL YR 1981 TOTAL 130742 MEAN 358 MAX 6960 MIN 110 CFSM .58 IN 7.91 WTR YR 1982 TOTAL 160692 MEAN 440 MAX 2920 MIN 110 CFSM .72 IN 9.72 285 ROOT RIVER BASIN

05385000 ROOT RIVER NEAR HOUSTON, MN LOCATION.---43°46'07", long 91°34'11", in SW4NWJ sec.33, T.104 N., R.6 W., Houston County, Hydrologic Unit 07040008, on right bank 0.2 mi (0.3 km) north of Houston and 1.6 mi (2.6 km) upstream from South Pork and 18.2 mi (29-3 km) upstream from mouth. DRAINAGE AREA. —1,270 mi 2 (3,290 tan 2 ), approximately. PERIOD OP RECORD.—May 1909 to September 1917, May to November 1929, March 1930 to current year. Monthly discharge only for some periods, published in WSP 1308. REVISED RECORDS.—WSP 895: Drainage area. WSP 1508: 1911-12. WSP 1628: 1948(P). GAGE.—Water-stage recorder. Datum of gage is 667.00 ft (203.302 m) National Geodetic Vertical Datum of 1929. May 28, 1909, to Sept. 30, 1917, nonrecordlng gage at site 1.3 mi (2.1 km) downstream at different datum. May 4, 1929, to Sept. 27, 1933, nonrecording gage and Sept. 28, 1933 to June 26, 1980, recording gage at site 0.9 mi (1.4 km) upstream at datum 671.86 ft (204.783 m). REMARKS.—Records good except those for winter periods, which are fair. Slight diurnal fluctuation at low flows caused by powerplants above station. AVERAGE DISCHARGE. —60 years (water years 1910-17, 1931-32), 681 ftVs (19-29 m^/s), 7-28 in/yr (185 tnm/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 37,000 ft^/s (1,050 m3 /s) Apr. 1, 1952, gage height, 13.90 ft (4.237 m): maximum gage height, 18.32 ft (5.584 m) Mar. 2, 1965 (backwater from ice); minimum discharge, 65 ft3/ s (1.84 iWs) Dec. 26, 1933, Feb. 25, 1935. EXTREMES FOR CURRENT YEAR.—Maximum discharge, 4,460 ft 3/s (126 m3/s) May 14, sage height, 9-52 ft (2.902 m), no peak above base of 5,000 ft^/s (142 np/s); minimum daily, 365 ft-Vs (10.3 m-Vs) Jan. 31; minimum gage height, 3.56 ft (1.085 m) Mar. 9.

DISCHARGE, IM CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 637 557 524 400 370 509 2870 960 2690 721 622 776 2 616 547 530 395 370 500 2220 944 1980 714 625 839 3 608 544 518 390 370 487 1930 928 1680 711 625 828 4 621 548 506 390 370 496 2600 912 1520 705 623 730 5 630 545 479 385 370 475 1930 1080 1420 701 621 681 6 639 544 482 385 370 458 1440 2160 1340 688 618 665 7 629 539 520 384 370 449 1320 3770 1280 724 610 643 8 617 538 520 380 370 462 1280 2920 1240 714 599 627 9 608 529 503 380 370 445 1210 2090 1190 667 583 613 10 607 528 478 380 370 475 1150 1760 1150 667 574 623 11 605 526 474 380 370 504 1100 1580 1100 668 571 618 12 595 526 490 380 370 504 1070 1490 1050 662 562 603 13 587 526 509 375 370 562 1070 2930 1010 780 557 698 14 613 526 499 375 370 672 1210 3820 975 845 557 705 15 616 526 480 375 380 1020 1290 2640 975 744 557 711 16 602 534 470 375 390 1510 1300 2340 981 715 562 713 17 624 535 460 375 410 3650 1690 2270 949 681 562 682 18 663 532 450 370 430 2840 2650 2500 938 673 562 656 19 648 531 450 370 450 3670 2250 3110 912 685 562 629 20 640 535 445 370 470 3550 1780 2490 881 668 562 607 21 635 529 440 370 490 2710 1590 2120 850 658 566 583 22 618 505 440 370 530 2340 1440 1920 819 658 569 567 23 604 512 435 370 542 2070 1340 2180 799 649 575 562 24 S90 521 430 370 540 3000 1270 2300 771 653 603 560 25 bo;> 519 425 370 520 3940 1200 1940 767 653 670 550 26 587 514 420 370 509 3280 1140 1780 765 652 652 543 27 579 518 415 370 504 2390 1080 1730 747 644 625 539 28 573 511 410 370 509 I960 1040 1930 744 653 594 541 29 572 508 410 370 —— 1800 1000 2020 755 648 592 548 30 568 500 405 370 —— 2020 981 1730 733 642 675 1040 31 566 —— 400 365 —— 3030 —— 2070 —— 633 752 —— TOTAL 18886 15853 14417 11679 11854 51778 45441 64414 33011 21276 18587 19680 MEAN 609 528 465 377 423 1670 1515 2078 1100 686 600 656 MAX 663 557 530 400 542 3940 2870 3820 2690 845 752 1040 MIN 566 500 400 365 370 445 981 912 733 633 557 539 CFSM .48 .42 .37 .30 .33 1.32 1.19 1.64 .87 .54 .47 .52 IN. .55 .46 .42 • 34 .35 1.52 1.33 1.89 • 97 .62 .54 .58 CAL YR 1981 TOTAL 299615 MEAN 821 MAX 11400 MIN 400 CPSM .65 IN 8 .78 WTR YR 1982 TOTAL 326876 MEAN 896 MAX 3940 MIN 365 CPSM .71 IN 9 .57 286 ROOT RIVER BASIN 05385500 SOUTH PORK ROOT RIVER NEAR HOUSTON, MN LOCATION.—Lat 43°44'19", long 91 O 33'50", in NEJSW4 sec.9, T.lftS N., R.6 W. , Houston County, Hydrologic Unit 07040008, on left bank 50 ft (15 m) downstream from bridge on State Highway 76, 0.5 mi (0.8 km) upstream from Badger Creek and 1.5 mi (2.4 km) south of Houston. DRAINAGE AREA. —275 mi 2 (712 km 2 ). WATER-DISCHARGE RECORDS PERIOD OP RECORD.—January 1953 to current year. REVISED RECORDS.—WSP 1388: 1953. WSP 1914: 1956(M), 1959(P), I960. GAGE.--Water-stage recorder. Datum of gage is 680.41 ft (207.389 m) National Geodetic Vertical Datum of 1929. REMARKS.—Records good except those for winter period, which are fair. AVERAGE DISCHARGE.--29 years, 138 ft3/ s (3-908 m 3 /s), 6.81 in/yr (173 mm/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 11,000 ft 3/s (312 m 3/s) June 21, 1974, gage height, 13.81 ft (4.209 m); minimum, 11 ft 3 / s (0.31 m 3 /s) Nov. 28, 1961, gage height, 1.47 ft (0.448 m); minimum gage height, 0.85 ft (0.259 m) Aug. 17, 1967. EXTREMES OUTSIDE PERIOD OP RECORD.—Flood of Mar. 26, 1950, reached a stage of 12.81 ft (3.904 m), from floodmark, discharge, 7,040 ft 3 /s (199 m 3 /s). EXTREMES POR CURRENT YEAR,—Maximum discharge, 780 ft 3 /s (22.1 m 3/s) Mar. 17, gage height, 6.36 ft (1.939 m), no peak above base of 900 ft 3 /s (25-5 m3 /s); minimum observed discharge, 102 ft'/s (2.89 m3 /s) Jan. 7; minimum gage height, 1.88 ft (0.573 m) Mar. 7, 8.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 1 165 152 157 130 120 132 335 193 252 186 157 185 2 160 150 153 130 120 131 305 190 242 173 157 182 3 159 150 149 129 120 130 308 187 235 175 156 166 4 165 150 149 128 120 132 274 190 230 174 164 160 5 164 152 146 127 120 130 258 228 226 171 171 160 6 162 150 148 122 120 126 245 264 222 171 159 165 7 157 150 148 110 120 125 234 283 225 173 156 160 8 156 150 147 116 120 128 225 247 222 169 155 156 9 156 149 146 120 120 129 222 235 219 166 152 156 10 157 149 142 120 120 131 216 232 222 168 151 167 11 155 149 146 120 122 129 213 225 212 171 150 176 12 155 149 146 120 122 131 214 233 208 166 149 165 13 155 149 145 120 124 162 219 253 203 177 149 221 14 164 149 146 120 128 183 216 240 202 169 150 204 15 162 152 144 120 130 220 214 233 215 178 149 180 16 157 154 142 120 134 359 222 242 213 197 149 168 17 164 150 140 120 136 656 232 277 200 177 148 171 18 174 150 140 120 136 383 225 306 200 172 147 169 19 167 150 138 120 134 440 228 291 196 168 148 166 20 163 152 138 120 135 352 246 278 193 165 ' 146 164 21 160 148 137 120 134 304 239 266 }93 164 144 161 22 157 147 136 120 133 275 233 281 188 174 152 159 23 157' -q 150 136 120 139 275 230 313 184 165 153 159 24 152 135 120 139 418 225 295 ^84 161 158 160 25 160 148 134 120 136 390 220 290 202 159 191 157 26 159 152 134 120 132 325 218 288 188 158 167 157 27 157 152 133 120 134 284 208 296 184 161 153 156 28 155 148 132 120 133 264 202 283 182 165 151 157 29 155 147 131 120 —— 261 197 274 184 159 158 158 30 154 148 130 120 —— 304 196 271 179 166 217 159 31 153 —— 130 120 —— 397 —— 264 161 181 TOTAL 4943 4498 4378 3752 3581 7806 7019 7948 6205 5259 4888 5024 MEAN 159 150 141 121 128 252 234 256 207 170 158 167 MAX 174 154 157 130 139 656 335 313 252 197 217 221 MIN 153 147 130 110 120 125 196 187 179 158 144 156 CFSM .58 .55 .51 .44 .47 .92 .85 .93 .75 .62 .58 .61 IN. .67 .61 .59 .51 .48 1.06 .95 1.08 184 .71 .66 .68 CAL YR 1981 TOTAL 68586 MEAN 188 MAX 1940 MIN 115 CFSM .68 IN 9.28 WTR YR 1982 TOTAL 65301 MEAN 179 MAX 656 MIN 110 CFSM .65 IN 8.83 1 287 RIVER BASIN 05457000 CEDAR RIVER NEAR AUSTIN, MN LOCATION.—Lat 43°38'11", long 92°58'26" (Revised), in NEJSEJ sec.15, T.102 N., R.18 W., Mower County, Hydrologic Unit 07080201, on left bank 200 ft (61 m) upstream from abandoned powerhouse, 500 ft (152 m) downstream from highway bridge, 1.1 mi (1.8 km) downstream from Turtle Creek, and 1.1 mi (1.8 km) south of Austin. DRAINAGE AREA.—425 mi 2 (1,100 km 2 ). PERIOD OP RECORD.—May 1909 to September 1914, October 1944 to current year. REVISED RECORDS.—WSP 1145: 1945, 1948. GAGE.—Water-stage recorder. Datum of gage is 1,162.10 ft (354.208 m) National Geodetic Vertical Datum of 1929. May 1909 to April 1912, nonrecording gage in tailwater of powerplant 200 ft (6l m) downstream at datum 3.1 ft (0.94 m) lower. May 1912 to September 1914, nonrecording gage on highway bridge 500 ft (152 m) downstream at datum 1.1 ft (0.34 m) lower. REMARKS.—Records good except those for winter periods, which are fair. AVERAGE DISCHARGE.—43 years (water years 1910-14, 1945-82), 194 ft 3 /s (5.494 m3 /s), 6.20 in/yr (157 mm/yr); median of yearly mean discharges, 182 ft^/s (5.15 m 3 /s), 5.82 in/yr (148 mm/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 12,400 ft 3 /s (351 m 3 /s) July 17, 1978, gage height, 20.35 ft (6.203 m) from floodmark in well; no flow for several days in 1911. EXTREMES FOR CURRENT YEAR.—Peak discharges above base of 1,400 ft 3 /s (39-6 m3 /s) and maximum (*):

Discharge- Gage height Discharge Gage height Date Time (fWs) (m 3 /s) (ft) (m) Date Time (ft 3 /s) (m3/ s ) (ft) (m) Mar. 19 0300 2160 61.2 7.35 2.240 •May 5 0830 *3060 86.7 *9.08 2.768 Mar. 25 0100 2440 69.1 7.86 2.396 May 19 1315 1490 42.2 6.12 1.865 Mar. 31 0615 1470 41.6 5.90 1.798 May 22 2045 1530 43.3 6.21 1.893 Apr. 17 1700 2420 68.5 7.91 2.411 Sept 14 1000 2060 58.3 7.21 2.198 Minimum discharge, 51 ft 3 /s (1.44 m 3/s ) Mar. 7, gage height, 2.27 ft (0.692 m).

DISCHARGE, IN CUBIC PEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AOG SEP 1 114 156 105 73 63 72 1100 213 732 159 83 305 2 106 151 123 72 63 74 835 201 597 152 82 451 3 113 147 121 72 63 72 1100 195 425 156 83 323 4 143 146 126 71 63 74 964 354 363 143 130 199 5 146 153 106 71 63 72 714 2650 323 134 111 174 6 150 144 116 70 63 72 501 2060 315 156 98 157 7 146 137 123 69 62 69 482 1630 384 173 89 149 8 145 135 117 69 62 71 439 1050 370 196 84 140 9 143 127 111 68 62 67 391 717 314 166 79 132 10 140 125 96 68 62 72 359 553 277 162 77 128 11 133 122 115 67 62 78 330 459 253 155 76 122 12 128 120 112 67 62 91 419 461 245 147 73 170 13 132 119 110 66 62 112 567 863 228 156 74 1200 14 150 116 100 66 62 137 590 853 238 153 73 1930 15 165 116 97 66 63 173 620 751 256 180 72 1260 16 204 119 98 65 65 348 929 958 248 380 73 800 17 216 117 93 65 65 938 2150 896 238 345 71 607 18 256 114 91 65 67 1390 1850 1140 234 274 67 479 19 292 125 89 64 67 2100 1020 1360 223 232 68 382 20 271 119 86 64 72 1980 764 957 213 181 67 307 21 240 98 83 64 71 1760 628 699 206 173 62 258 22 210 106 84 64 78 1470 525 1230 195 154 121 228 23 195 113 83 64 80 1400 444 1230 186 148 92 209 24 184 118 82 63 76 2040 388 815 183 129 140 194 25 185 117 79 63 72 2200 344 640 193 118 150 177 26 181 124 78 63 74 1550 316 575 192 112 127 162 27 181 119 77 63 72 1090 278 763 184 133 103 154 28 178 115 76 63 72 910 254 870 180 104 86 144 29 173 112 75 63 —— 922 236 727 177 98 168 168 30 173 110 74 59 —— 1190 228 563 171 92 207 333 31 171 —— 74 63 —— 1410 —— 574 —— 86 224 —— TOTAL 5364 3740 3000 2050 1868 24004 19765 27007 8343 5147 3110 11442 MEAN 173 125 96.8 66.1 66.7 774 659 871 278 166 100 381 MAX 292 156 126 73 80 2200 2150 2650 732 380 224 1930 MIN 106 98 74 59 62 67 228 195 171 86 62 122 CPSM .41 .29 .23 .16 .16 1.82 1.55 2.05 .65 .39 .24 .90 IN. .47 .33 .26 .18 .16 2.10 1.73 2.36 .73 .45 .27 1.00 CAL YR 1981 TOTAL 81380 MEAN 223 MAX 3680 MIN 56 CPSM .53 IN 7.12 WTR YR 1982 TOTAL 114840 MEAN 315 MAX 2650 MIN 59 CPSM .74 IN 10.05 - BB DES MOINES RIVER BASIN

05476000 DES MOINES RIVER AT JACKSON, MN LOCATION.—Lat 43°37'10", long 94°59'10", in SEtiSWJ sec.24, T.102 N., R.35 W., Jackson County, Hydrologic Unit 07100001, on right bank in storage room of city powerplant in Jackson. DRAINAGE AREA. —1,220 mi 2 (3,160 km 2 ), approximately. PERIOD OP RECORD.—May 1909 to December 1913, August 1930 to current year (winter record incomplete prior to 1936). Published as Des Moines River near Jackson, 1930-35, as West Pork Des Moines River near Jackson, 1936-44, and as West Pork Des Moines River at Jackson, 1945-69. REVISED RECORDS.—WSP 1115: 1942. WSP 1175: Drainage area. WSP 1238: 1950. rfSP 1308: 1938(M). GAGE.—Water-stage recorder. Datum of gage is 1,287.75 ft (392.506 m) National Geodetic Vertical Datum of 1929. May 31, 1909, to Dec. 20, 1913, nonrecording gage at site 0.6 mi (1.0 kin) downstream at datum 0.99 ft (0.302 m) lower. Aug. 22, 1930, to Sept. 30, 1944, nonrecording gage at site 7 mi (11 km) upstream at datum 17.10 ft (5.212 m) higher. Oct. 1, 1944, to Oct. 26, 1949, nonrecording gage at site 600 ft (183 m) upstream at datum 10.64 ft (3.243 m) higher. Oct. 27, 1949, to Dec. 15, 1965, water-stage recorder 200 ft (61 m) downstream at present datum. REMARKS.—Records good except those for winter period, which are fair. Regulation at times by Yankton, Long, Shetek, and Heron Lakes. AVERAGE DISCHARGE. — 47 years (water years 1936-82), 277 ft 3 /s (7.845 m 3 /s), 3-08 in/yr (78 mm/yr); median of yearly mean discharges, 218 ft 3 /s (6.17 m 3 /s), 2.43 in/yr (62 mm/yr). EXTREMES FOR PERIOD OP RECORD.—Maximum discharge, 15,700 ft 3 /s (445 m 3 /s) Apr. 11, 1969, gage height, 19.45 ft (5.928 m); no flow at times. EXTREMES POR CURRENT YEAR.—Peak discharge above base of 500 ft 3 /s (14.2 m 3 /s) and maximum (*): Discharge Gage height Discharge Gage height Date Time (ft 3 /s) (m 3 /s) (ft) (m) Date Time (ft/s) (m^/s) (ft) (m) Feb. 23 0130 660 18.7 a7.07 2.155 May 19 1715 1110 31.4 7.35 2.240 Apr. 3 2400 *1130 32.0 *7.39 2.252 June 6 1945 1080 30.6 7.25 2.210 Apr. 18 0415 798 22.6 6.32 1.926 July 21 0245 564 16.0 5.43 1.655 Backwater from ice. Minimum discharge, 2.1 ft 3 /s (0.034 m 3 /s) Oct. 1, gage height, 2.87 ft (0.875 m).

DISCHARGE,, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 MEAN VALUES DAY OCT NOV JAN PEB MAR APR MAY JUN JUL AUG SEP 1 4.3 22 22 8.4 7.6 160 829 301 706 265 173 57 2 4.3 24 18 8.3 7.6 135 763 281 736 245 162 51 3 13 23 18 8.2 7.6 95 915 263 778 237 142 54 4 12 22 17 8.2 7.6 90 977 254 844 222 151 53 5 14 22 17 8.1 7.6 65 651 252 914 208 214 56 6 18 21 16 8.0 7.6 45 628 236 986 226 202 64 7 16 22 15 8.0 7.6 40 771 227 993 210 208 65 8 19 21 15 7-9 7.6 115 700 214 936 193 208 63 9 17 18 14 7.9 7.6 245 672 204 888 196 189 76 10 16 18 13 7.8 7.6 250 642 201 882 226 162 80 11 15 16 13 7.8 7.6 290 599 203 877 288 143 74 12 16 16 12 7-7 7.6 360 600 198 807 307 129 110 13 14 15 12 7-7 7.6 455 626 194 742 323 120 110 14 14 16 12 7-7 7.0 505 620 230 690 306 111 116 15 24 15 11 7.6 6.5 560 651 298 664 341 92 134 16 24 16 11 7.6 6.5 640 719 369 639 351 89 150 17 28 16 10 7-6 6.0 740 754 506 604 359 84 166 18 28 16 10 7.6 5.5 770 779 892 595 376 76 163 19 32 18 10 7.6 5.0 785 743 1070 583 436 72 158 20 25 15 10 7.6 8.0 855 732 1060 578 475 68 155 21 25 19 9.8 7.6 22 775 711 953 533 508 65 136 22 26 16 9-6 7.6 105 770 660 891 1)82 478 56 123 23 24 22 9.4 7.6 510 815 601 840 442 407 49 117 24 26 23 9.2 7.6 250 890 575 779 410 353 54 107 25 23 23 9.2 7.6 112 920 546 720 400 327 52 95 26 23 26 9.0 7.6 160 905 495 695 393 297 46 84 27 27 30 9.0 7.6 230 840 442 680 378 263 47 79 28 23 27 8.8 7.6 190 830 401 670 345 245 44 75 29 22 23 8.6 7.6 —— 874 355 654 312 227 43 82 30 21 26 8.6 7.6 — _ 908 324 643 289 213 46 83 31 20 —— 8.4 7.6 — - 883 —— 661 —— 191 50 —— TOTAL 613.6 607 375.6 240.9 1722.3 16610 19481 15639 19426 9299 3347 2936 MEAN 19.8 20.2 12.1 7.77 61.5 536 649 504 648 300 108 97.9 MAX 32 30 22 8.4 510 920 977 1070 993 508 214 166 MIN 4.3 15 8.4 7.6 5.0 40 324 194 289 191 43 51 CPSM .02 .02 .01 .006 .05 .44 .53 .41 .53 .25 .09 .08 IN. .02 .02 .01 .01 .05 .51 .59 .48 .59 .28 .10 .09 CAL YR 1981 TOTAL 9940 .31 MEAN 27.2 MAX 398 MIN .35 CPSM .02 IN ,.30 WTR YR 1982 TOTAL 90297 .40 MEAN 247 MAX 1070 MIN 4.3 CPSM .20 IN 2.75 289

DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES

As the number of streams on which streamflow information is likely to be desired far exceeds the number of stream-gaging stations feasible to operate at one time, the Geological Survey collects limited streamflow data at sites other than stream-gaging stations. When limited streamflow data are collected on a systematic basis over a period of years for use in hydrologic analyses, the site at which the data are collected is called a partial-record station. Data collected at these partial-record stations are usable in low-flow or flood-flow analyses, depending on the type of data collected. In addition, discharge measurements are made at other sites not included in the partial-record program. These measurements are generally made in times of drought or flood to give better areal coverage to those events. Those measurements and others collected for some special reason are called measurements at miscellaneous sites. Records collected at partial-record stations are presented in two tables. The first is a table of annual maximum stage and discharge at high-flow stations and the second is a table of discharge measurements made at miscellaneous sites for both low flow and high flow. 290 291

HIGH-PLOW PARTIAL-RECORD STATIONS 97°

48 -48°

. 14024100 4024095 Volume 1

46°- 46 46°

EXPLANATION

Partial—record high—flow station

Major drainage basin divide

5384100 j 5387030J

Base from U. S. Geologicel Survey 50 MILES Minnesota state base map, 1:1,000,000 10 20 30 40 50 60 KILOMETERS

Figure a. —Location of high-flow partial-record stations 294 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES High-flow partial-record stations The following table contains annual maximum discharge for high-flow stations. A high-flow partial-record sta­ tion is equipped with a crest-stage gage, a device which will register the peak stage occurring between inspections of the gage. A stage-discharge relation for each gage is developed from discharge measurements made by indirect measurements of peak flow or by current meter. The date of the maximum discharge is not always certain but is usually determined by comparison with nearby continuous-record stations, weather records, or local inquiry. Only the maximum discharge for each water year is given. Information on some lower floods may have been obtained, and discharge measurements may have been made for purposes of establishing the stage-discharge relation, but these are not published herein. The years given in the period of record represent water years for which the 'annual maximum has been determined. Annual maximum discharge at high-flow partial-record stations during water year 1982 Annual maximum Drainage Period Gage Dis- Station Station name Location area of Date height charge No. (mi 2 ) Record (feet) (ft 3/s) Mississippi River main stem 05200200 Hennepin Creek Lat 47°23'52", long 95°05'12", in 41.4 1979-82 4-20-79 15.18 1 244 near Becida, MN NW4ME4 sec.11, T.145.N., R.35 W., 11- 1-79 11.83 i 65 Hubbard County, Hydrologic Unit 6-28-81 11.69 i 59 07010101, gages upstream and down- > 4-16-82 13.35 136 stream from culvert on Stumphges Rapids Trail approximately 0.5 mile west of Hubbard County Road 3, 3 miles north of Becida, and 1.5 miles upstream from mouth. 05200445 Mississippi River Lat 47°27'04", long 94°54'23", in a400 1973-82 5-18-82 12.83 1,480 at Bemidji, MN NW4NW4 sec.20, T.146 N., R.33 W., Beltrami County, Hydrologic Unit 07010101, at bridge on County High­ way 11, 1.5 miles southwest of intersection of U.S. Highway 2 and County Highway 7 in Bemidji. Smith Creek basin 05210200 Smith Creek near Lat 47°04'58", long 93°34'59", in 8.00 1961-82 4-16-82 5.81 133 Hill City, MN SE4NW4 sec.13, T.53 N., R.26 W., Itasca County, Hydrologic Unit 07010101, at culvert on U.S. High­ way 169, 6.2 miles north of Hill City. Swan River basin 05216980 Swan River Lat 47°07'H", long 93°15'00", in 3-95 1961-82 4-15-82 7.15 43 tributary at SE4NW4 sec.34, T.54 N., R.23 W., Warba, MN Itasca County, Hydrologic Unit 07010103, at culvert on U.S. High­ way 2, 0.9 mile upstream from mouth, and 1.1 miles southeast of Warba. Willow River basin 05221020 Willow River below Lat 46°42'36", long 93°33'21", in a445 1972-82 4-22-82 16.70 3,180 Palisade, MN NW4NE4 sec.30, T.49 N., R.25 W., Aitkin County, Hydrologic Unit 07010103, at bridge on County High­ way 3, 3.2 miles west of Palisade. Crow Wing River basin 05244000 Crow Wing River Lat 46°38'25", long 94°52'44", in alOlO 1910-141, 4-16-82 5.02 1,800 at Nimrod, MN SE4NW4 sec.32, T.137 N., R.33 W., 1931-811, Wadena County, Hydrologic Unit 1982 07010106, 200 ft upstream from bridge on County Highway 121, 0.2 mile north of Nimrod, and 0.7 mile upstream of Cat River. 05244200 Cat River near Lat 46°37'49", long 94°55'51", in 49.2 1961-82 4-16-82 8.26 415 Nimrod, MN SW4 SW4 sec.36, T.137 N., R.34 W., Wadena County, Hydrologic Unit 07010106. at bridge on State High­ way 227, 2.5 miles west of Nimrod, and 3.0 miles upstream from mouth. 05244440 Leaf River near Lat 46°27'25", long 94°50'29", in 860 1972-32 4-16-82 15.60 3,910 Aldrich, MN SW4SW4 sec.34, T.135 N., R.33 W., Wadena County, Hydrologic Unit 07010107. at bridge on County High­ way 29, 3.3 miles upstream from mouth, and 7-0 miles northeast of Aldrich. "See footnotes at end of the table." 295 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES Annual maximum discharge at high-flow partial-record stations during water year 1982 Annual maximum Drainage Period Gage Dis- Station Station name Location area of Date height charge No. (mi2 ) Record (feet) (ftVs) Crow Wing River basin--Continued 05245800 Sevemnile Creek Lat 460 20'32", long 94°32'56", in 18.3 1979-82 4-15-82 . 12.71 200 near Pillager, SW4SE4 sec.11, T.133 N., R.31 W., MN Cass County, Hydrologic Unit 07010106, at downstream wingwall of bridge on township road, 3.5 miles northwest of Pillager, 3.2 miles upstream from mouth. Mississippi River main stem 05261000 Mississippi River Lat 46°10'50", long 9 tt°21'56", in 11,010 1929#, 4-17-82 1147.08 26,600 near Port Ripley, SE4NW4 sec.27, T.43 N., R.32W., 1972-82 MN Crow Wing County, Hydrologic Unit 07010104, on left bank 600 ft up­ stream from Nokasippi River, and 1.0 mile north of Port Ripley. Platte River basin 05267900 Hillman Creek Lat 45°58'27", long 94°04'21", in 46.7 1964-82 5-10-79 13.82 i 590 near Pierz, MN NE4SE4 sec.9, T.40 N., R.30 W., 3-20-80 13.36 i 200 Morrison County, Hydrologic Unit 6-14-81 12.82 i 190 07010201, at bridge on county high­ 4-15-82 14.10 810 way, 1.1 miles upstream from mouth, and 1.5 miles east of Pierz. 05268000 Platte River Lat 45°50'43", long 94°17'40", in 335 1929-36#, 4-12-82 4.41 2,850 above Royalton, SEJNWJ sec.26, T.39 N., R.32 W., 1972-82 MN Morrison County, Hydrologic Unit 07010201. at bridge on County High­ way 27, 0.6 mile north of Royalton, and 6.6 miles upstream from mouth. Sauk River basin 05270300 Sauk River tribu­ Lat 45°31'22", long 94°48'31", in 7.06 1960-82 5-18-82 11.43 200 tary at Spring SW4NE4 sec.27, T.124 N., R.33 W., Hill, MN Stearns County, Hydrologic Unit 07010202. at culvert on State High­ way 4, 1.0 mile east of Spring Hill, and 2.7 miles upstream from mouth. 05270310 Sauk River tribu­ Lat 45°31'44", long 94°44'50", in .26 I960, 5-18-82 8.84 42 tary No. 2 near SE4SE4 sec.19, T.124 N., R.32 W., 1962-82 St. Martin, MN Stearns County, Hydrologic Unit 07010202. at culvert on county highway, 4.2 miles northwest of St. Martin. Johnson Creek basin 05271800 Johnson Creek Lat 45°26'30", long 94°14'46", in 3.82 1964-82 3- 9-82 b7.88 48 tributary at NW4NE4 sec.30, T.123 N., R.28 W., Luxemburg, MN Stearns County, Hydrologic Unit 07010203. at culverts on State High­ way 15, 0.8 mile south of Luxemburg. 05272000 Johnson Creek Lat 45°26'52", long 94°12'00", in 13.4 1964-82 9- 9-82 g8.49 t tributary No. 2 NE4SE4 sec.21, T.123 N., R.28 W., near St. Augusta, Stearns County, Hydrologic Unit MN 07010203, at culverts on county highway, 0.7 mile upstream from mouth, and 3.1 miles southwest of St. Augusta. 05272300 Johnson Creek Lat 45°27'49", long 94°09'19", in 46.7 1964-82 4- 7-82 13.35 t near St. NW4SW4 sec.13, T.123 N., R.28 W., Augusta, MN Stearns County, Hydrologic Unit 07010203, at bridge on County Highway 7, 1.0 mile south of St. Augusta, and 3.3 miles upstream from mouth. Mississippi River main stem 05273510 Mississippi River Lat 45°25'15", long 94°02'37", in - 1972-82 4-19-82 16.77 27,000 at Clearwater, NW4SW4 sec.23, T.34 N., R.30 W., MN Sherburne County, Hydrologic Unit 07010203, on left bank 700 ft up­ stream from bridge, on State Highway 24 at Clearwater. "See footnotes at end of the table." 296 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES Annual maximum discharge at high-flow partial-record stations during water year 1982 Annual maximum Drainage Period Gage Dis- Station Station name Location area of Date height charge No. (mi2 ) Record (feet) (ft3/s ) Otsego Creek basin 05273700 Otsego Creek near Lat 15°17'19", long 93°38'59", in 3.11 1961-82 7-10-82 ' e3.72 58 Otsego, MN SWJNEJ sec.13, T.131 N., R.21 W., Wright County, Hydrologic Unit 07010203, at culvert on County Highway 39, 1.3 miles upstream from mouth, and 1.9 miles west of Otsego. Elk River basin 05271200 Stony Brook tribu­ Lat 15°38'12", long 93°5l'5l", in 2.26 1960-82 3-30-82 e9.l6 50 tary near Foley, NE4NW4 sec.2, T.36 N., R.29 W., MN Benton County, Hydrologic Unit 07010203. at culvert on State High­ way 25, 0.3 mile upatream from mouth, and 1.5 miles south of Poley. Crow River basin 05276100 North Pork Crow Lat 15°23'29", long 91°16'56", in .55 1960-82 5-18-82 16.83 12 River tributary SW4NWJ sec.12, T.122 N., R.33 W., near Paynesville, Kandiyohi County, Hydrologic Unit MN 07010204. at culvert on county high­ way, 1.2 miles upstream from mouth, and 3.0 miles west of Paynesville. 05276200 North Pork Crow Lat 15°23'09", long 9l°l2'11", in 236 1973-82 1-13-82 d6.l7 1,170 River at SW4SE4 sec.9, T.122 N., R.32 W., Paynesville, Stearns County, Hydrologic Unit MN 07010201, at bridge on county road at northeast edge of Paynesville city limits. 05278350 Fountain Creek Lat 15°01'20", long 93°56'29", in 6.73 1962-82 3-29-82 e6.53 52 near Montrose, NE4NW4 sec.22, T.118 N., R.26 W., MN Wright County, Hydrologic Unit 07010201, at culvert on County Highway 30, 3-3 miles southwest of Montrose. 05278700 Otter Creek near Lat 11°51'23", long 91°01' 21", in 30.2 1961-82 3-29-82 8.11 175 Lester Prairie, SE4SE4 sec.28, T.117 N., R.27 W., MN McLeod County, Hydrologic Unit 07010205, at culvert on State High­ way 7, 2.1 miles northwest of Lester Prairie, and 1.1 miles upstream from mouth. 05278750 Otter Creek tribu­ Lat 11°53'31», long 91°0l'2l", in 1.51 1962-82 3-29-82 7.86 21 tary near Lester SE4SE4 sec.33, T.117 N., R.27 W., Prairie, MN McLeod County, Hydrologic Unit 07010205, at culvert on County High­ way 63, 1.7 miles northwest of Lester Prairie, and 3.3 miles upstream from mouth. 05278850 Buffalo Creek Lat 11°15'55", long 91°22'33", in 9.15 1961-82 3-29-82 11.35 56 tributary near NE4SE4 sec.13, T.115 N., R.30 W., Brownton, MN McLeod County, Hydrologic Unit 07010205, at culvert on State High­ way 15, 0.6 mile upstream from mouth, and 2.6 miles northwest of Brownton. 05279000 South Pork Crow Lat 11°51'20", long 93°53'05", in 1170 193l-79#, 3-29-82 d!3.59 1,970 River near SW4SW4 sec.30, T.117 N., R. 25 W., 1980-82 Mayer, MN Carver County, Hydrologic Unit 07010205, near center of span on downstream side of bridge on State Highway 7, 1.3 miles north of Mayer, 1.3 miles southwest of Watertown, and 16 miles upstream from confluence with North Pork. 05280300 School Lake Creek Lat 15°12'09", long 93°11'31", in 2.01 1961-82 3-30-82 e8.6l 6.1 tributary near NWJSE4 sec.15, T.120 N., R.21 W., St. Michael, MN Wright County, Hydrologic Unit 07010201, at culvert on county high­ way, 0.2 mile upstream from mouth, and 1.5 miles southwest of St. Michael. "See footnotes at end of the table." 297 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES Annual maximum discharge at high-flow partial-record stations during water year 1982 Annual maximum Drainage 'Period Gage Dis- Station Station name Location area of Date height charge No. (mi2 ) Record (feet) (ftVs) Rum River basin 05284600 Robinson Brook Lat 45°58'22", long 93°39'42", in 4.79 1960-82 4-15-82 . d!4.84 73 near Onamia, NE4SE4 sec.11, T.40 N., R.27 W., MN Mille Lacs County, Hydrologic Unit 07010207, at culvert on U.S. Highway 169, 0.2 mile upstream from mouth, and 6.8 miles south of Onamia. 05284620 Rum River tribu­ Lat 45°57'29", long 93°39'43", in 2.37 1960-82 4-15-82 8.36 5 tary near NE4SE4 sec.14, T.40 N., R.27 W., Onamia, MN Mille Lacs County, Hydrologic Unit 07010207, at culvert on U.S. Highway 169, 0.3 mile upstream from mouth, and 7.8 miles south of Onamia. 05284920 Stanchfield Creek Lat 45°41'29", long 93°23'45", in 1.26 1961-82 3-30-82 e6.83 28 tributary near NW4SE4 sec.13, T.37 N., R.25 W., Day, MN Isanti County, Hydrologic Unit 07010207, at culvert on County High­ way 60, 0.5 mile upstream from mouth, and 1.5 miles southwest of Day. Bassett Creek basin 05288800 Bassett Creek Lat 44°59'58", long 93°21'17", in 1963-82 9-10-82 d8.20 174 in Golden WJ sec.28, T.118 N., R.21 W., Valley, MN Hennepin County, Hydrologic Unit 07010206, at bridge on County Highway 66, 0.2 mile west of underpass on State Highway 100 in Golden Valley. 05288810 North Fork Lat 45°01'06", long 93°21'32", in 1963-82 5-17-82 5.32 21 Bassett Creek NE4 sec.21, T.118 N., R.21 W., at Crystal, MN Hennepin County, Hydrologic Unit 07010206, at culvert on 34th Avenue North at Crystal, and 0.8 mile upstream from mouth. 05288850 Bassett Creek (at Lat 44°59'04", long 93°20'40", near 1963-69, 7-10-82 6.55 49 State Highway center of wJ sec.19, T.29 N., 1971-82 55) in Golden R.24 W., Hennepin County, Hydro- Valley, MN logic Unit 07010206, at culvert on Olson Memorial Highway (State Highway 55), 0.2 mile east of State Highway 100 in Golden Valley. 05288900 Bassett Creek at Lat 44°58'45", long 93°l8'48", in 41.6 1952-56, 9-10-82 6.76 154 Fruen Mill in SE4 sec.20, T.29 N., R. 24 W., 1963-82 Golden Valley, Hennepin County, Hydrologic Unit MN 07010206, at Fruen Mill, 700 ft downstream from Glenwood Avenue, at Minneapolis. Minnesota River basin West Branch Lac Lat 44°47'26", long 96°27'42", seq. 28 1982 4- 2-82 5.38 110 qui Parle River 01, in NE4NE4 sec.9, T. 115 N., near Gary, SD R.47 W., Deuel County, So. Dak., Hydrologic Unit 07020003, at bridge on Deuel County Road, 0.25 mile west of Gary, SD. Florida Creek Lat 44°49'00", long 96°25'10", seq. 50 1982 3-30-82 15.76 189 near Burr, MN 01, in SE4SE4 sec,29, T. 115 N., R. 46 W., Yellow Medicine County, Hydrologic Unit 07020003, at cul­ vert on County Road 15, 2.2 miles west of Burr and 6 miles northwest of Canby. 05299100 Lazarus Creek Lat 44°43'04", long 96°19'42", in 2.97 1960-82 4- 3-82 d9.68 4.0 tributary near NE4NW4 sec.6, T.114 N., R.45 W., Canby, MN Yellow Medicine County, Hydrologic Unit 07020003, at culvert on State Highway 68, 2.7 miles west of Canby, and 4.2 miles upstream from mouth. 05302500 Little Chippewa Lat 45°36'52", long 95°37'12", in 69.6 1979-82 _ 3-82 e!3.22 140 River near NW4NE4 sec.30, T.125 N., R.39 W., Starbuck, MN Pope County,Hydrologic Unit 07020005, at downstream wingwall on triple box culvert on State Highway 28, 4.4 miles west of Starbuck. "See footnotes at end of the table. 1 298 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES Annual maximum discharge at high-flow partial-record stations during water year 1982 Annual maximum Drainage Period Gage Dis- Station Station name Location area of Date height charge No. (mi2 ) Record (feet) (ftVs) Minnesota River basin—Continued 05302970 Outlet Creek Lat 45°31'35", long 95°33'43", in .47 1962-82 4- 3-82 • e8.03 12 tributary near NWJNWJ sec.27, T.124 N., R.39 W., Starbuck, MN Pope County, Hydrologic Unit 07020005, at culvert on State Highway 29, 0.2 mile upstream from mouth, and 6.6 miles south of Starbuck. 05305200 Spring Creek near Lat 44°58'4l", long 95°42'57", in 16.0 1959-82 4 2-82 14.79 130 Montevideo, MN NWJNWJ sec.5, T.117 N., R.40 W., Chippewa County, Hydrologic Unit 07020005, at culvert on State High­ way 29, 1.2 miles upstream from mouth, and 2.0 miles north of Montevideo. 05311200 North Branch Lat 44°27'32", long 96°21'27", in 14.8 , 1960-82 7-23-81 11.63 i 1.0 Yellow Medicine NEJNWJ sec.2, T.lll N., R.46 W., 3-29-82 e!3.25 35 River near Lincoln County, Hydrologic Unit Ivanhoe, MN 07020004, at culvert on State High­ way 19, 5.3 miles west of Ivanhoe. 053H250 North Branch Lat 44°33'12", long 96°l6'33", in .33 1960-82 7- 7-82 7.57 3.4 Yellow Medicine SEJNEJ sec.33, T.113 N., R.45 W., River tributary Lincoln County, Hydrologic Unit near Wilno, MN 07020004, at culvert on U.S. High­ way 75, 2.1 miles upstream from mouth, and 4.3 miles northwest of Wilno. 05311400 South Branch Lat 44°33'50", long 95°59'50", in 111 196o-8l#, 3-31-82 e7.49 194 Yellow Medicine SE4 sec.26, T.113 N., R.43 W., 1982 River at Lyon County, Hydrologic Unit Minneota, MN 07020004, on downstream side of bridge on State Highway 68, 0.5 mile northwest of Minneota and 6 miles upstream from mouth. 05314500 Hawk Creek near Lat 44°52'10", long 95°28'58", in 474 1949-54#, 4- 4-82 14.95 t Maynard, MN SW4NW4 sec.7, T.116 N., R.38 W., 1981-82 at Renville and Chippewa County line, Hydrologic Unit 07020004, at right downstream side of bridge on State Highway 23, 3.0 miles southwest of Maynard. 05315200 Prairie Ravine Lat 44°29'44", long 95°47'48", in 5.63 1959-64#, 7-15-82 d6.74 25 near Marshall, SEJNEJ sec.20, T.112 N., R.4l W., 1965-82 MN Lyon County, Hydrologic Unit 07020006, at culvert on U.S. High­ way 59, 2.7 miles north of Marshall. 05316570 Beaver Creek at Lat 44°35'03", long 95°02'49", in 194 1972-82 4- 7-82 d9.45 496 Beaver Palls, NEJNWJ sec.22, T.113 N., R.35 W., MN Renville County, Hydrologic Unit 07020004, at bridge on County High­ way 2 in Beaver Palls, 2.2 miles upstream from mouth, and 3.8 miles northwest of Morton. 05316690 Spring Creek Lat 44°23'54", long 94°45'35", in NWJ 3.69 1966-82 5-17-82 d6.54 90 tributary near sec.25, T.lll N., R.33 W., Brown Sleepy Eye, MN County, Hydrologic Unit 07020007, at culvert on county highway, 0.1 mile upstream from mouth, and 7.5 miles north of Sleepy Eye. 05316700 Spring Creek near Lat°44 24'12", long 94°44'4l", in 31.3 1959-82 5-17-82 11.93 245 Sleepy Eye, MN NE4SEJ sec.24, T.lll N., R.33 W., Brown County, Hydrologic Unit 07020007. at culvert on county high­ way, 4.3 miles upstream from mouth, and 7.5 miles north of Sleepy Eye. 05316800 Cottonwood River Lat 44°14'24", long 95°57'22", in .91 1959-82 7-15-82 8.40 130 tributary near NWJNWJ sec.19, T.109 N., R.42 W., Balaton, MN Lyon County, Hydrologic Unit 07020008. at culvert on U.S. High­ way 14, 4.0 miles west of Balaton. "See footnotes at end of the table." DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES 299 Annual maximum discharge at high-flow partial-record stations during water year 1982 Annual maximum Drainage Period Gage Dis- Station Station name Location area of Date height charge No. (mi2 ) Record (feet) (ft3/s) Minnesota River basin--Continued 05316920 Cotbonwood River Lat 44°10'34", long 95°07'15", in .42 1966-82 5-18-82 5.82 63 tributary No. 2 SW4NW4 sec.12, T.108 N., R.36 W., near Sanborn, Cottonwood County, Hydrologlc Unit MN 07020008, at culvert on U.S. High­ way 71, 2.4 miles south of Sanborn. 05316950 Cottonwood River Lat 44°12'12", long 95°02'53", on 773 1973-82 4- 2-82 d!9.43 1400 near Spring­ line between sees.33 and 34, T.109 field, MN N., R.35 W., Brown County, Hydro- logic Unit 07020008, at bridge on County Highway 2, 1.3 miles down­ stream from Mound Creek, 1.0 mile upstream from Coal Mine Creek, and 3-5 miles southwest of Springfield. 05317845 East Branch Blue Lat 43°37'58", long 93°42'28", in 29.6 1979-82 3-21-82 e!7.48 t Earth River near SE4SE4 sec.16, T.102 N., R.24 W., Walters, MN Paribault County, Hydrologic Unit 07020009, at left downstream wing- wall of box culvert on State Highway 22, 2.5 miles northwest of Walters. 05317850 Poster Creek Lat 43°39'31", long 93°35'30", in 2.26 1959-82 9-11-82 d6.45 30 near Alden, MN NE4NE4 sec.9, T.102 N., R.23 W., Preeborn County, Hydrologic Unit 07020009, at culvert on County Road 46 (old U.S. Highway 16), 1.2 miles southwest of Alden. 05318000 East Branch Blue Lat 43°37'50", long 93°47'25", in 132 1973-82 3-21-82 d8.29 270 Earth River near NE4NE4 sec.23, T.102 N., R.25 W., Bricelyn, MN Paribault County, Hydrologic Unit 07020009, at bridge on county high­ way, 2.0 miles upstream from Brush Creek, 3.0 miles downstream from South Walnut Lake, and 5.0 miles northeast of Bricelyn. 05318100 East Branch Blue Lat 43°37'09", long 94°01'03", in 9.20 1960-82 5-12-82 8.27 275 Earth River SW4SE4 sec.24, T.102 N., R.27 W., tributary near Paribault County, Hydrologic Unit Blue Earth, MN 07020009. at culvert on County High­ way 13, 0.5 mile upstream from mouth, and 4.3 miles east of Blue Earth. 05318300 Watonwan River Lat 43°59'55", long 95°07'11", in 13.0 1960-82 5-20-82 e!5.04 20 near Delft, MN NE4SE4 sec.11, T.106 N., R.36 W., Cottonwood County, Hydrologic Unit 07020010. at culvert on U.S. Highway 71, 1.7 miles northwest of Delft. 05318897 South Pork Lat 43°53'08", long 94°4l'27", in 109 1979-82 5-31-82 d!2.64 360 Watonwan River SE4NW4 sec.21, T.105 N., R.32 W., near Orrasby, MN Watonwan County, Hydrologic Unit 07020010, at right downstream wing- wall of bridge on township road, 2.6 miles north of Ormsby, 5.0 miles upstream from mouth at Willow Creek. 05320200 Le Sueur River Lat 44°07'29", long 93°57'33", in .073 1959-82 5-31-82 19.98 14 tributary near SE4SW4 sec.28, T.108 N., R.26 W., Mankato, MN Blue Earth County, Hydrologic Unit 07020011, at culvert on State Highway 22, 0.2 mile up stream from mouth, and 1.5 miles southeast of Mankato Airport. 05320300 Cobb River Lat 44°01'05", long 93°57'30", in 7.25 1959-82 5-31-82 15.27 105 tributary near SW4NE4 sec.4, T.106 N., R.26 W., Mapleton, MN Blue Earth County, Hydrologic Unit 07020011, at culvert on State Highway 22, 1.0 mile upstream from mouth, and 6.3 miles north of Mapleton. 05320400 Maple River Lat 43°55'18", long 94°01'17", in 6.22 1959-82 5-31-82 d!5.92 42 tributary near SE4SW4 sec.l, T.105 N., R.27 W., Mapleton, MN Blue Earth County, Hydrologic Unit 07020011, at culvert on State High­ way 30, 0.9 mile upstream from mouth, and 3«3 miles west of Mapleton. "See footnotes at end of the table. 1 300 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES Annual maximum discharge at high-flow partial-record stations during water year 1982 Annual maximum Drainage Period Gage Dis- Station Station name Location area of Date height charge No. (ml2 ) Record (feet) (ft 3 /s) Minnesota River basin--Continued 05320480 Maple River near Lat 44°03'54", long 94°01'32", in c343 1972-82 3-18-82 11.20 t Rapidan, MM SW4 sec.13, T.107 N., R.27 W., Blue Earth County, Hydrologlc Unit 07020011. at bridge on County High­ way 35, 3.0 miles southeast of Rapidan, and 3.3 miles upstream from mouth. 05326100 Middle Branch Lat 44°30'27", long 94°15'00", in 68.5 1979-82 3-29-82 e!9.29 700 Rush River near 3W4NW4 sec.18, T.I12 N., on line Gaylord, MN between R.28 W. and R.29 W., Sibley County, Hydrologic Unit 07020012, at downstream side of bridge on township road, 3.0 miles southwest of Gaylord, 10.5 miles upstream from the main branch of Rush River. 05330200 Rice Lake Lat 44°25'42", long 93°32'10", in 3.16 1960-82 3-18-82 e7.4l 16 tribatary near NEJNW4 sec.13, T.lll N., R.23 W., Montgomery, MN Le Sueur County, Hydrologlc Unit 07020012. at culvert on State High­ way 21, 1.8 miles upstream from Rice Lake, and 2.5 miles east of Montgomery. 05330300 Sand Creek near Lat 44°32'37", long 93°32'l6", in 62.4 1960-82 3-28-82 h220 Nerf Prague, MN NE4NWJ sec.l, T.112 N., R.23 W., Le Sueur County, Hydrologic Unit 07020012, at culvert on State High­ way 13 and 19, 1.9 miles east of New Prague. 05330550 East Branch Raven Lat 44°34'21", long 93°35'58", in NWJ 22.1 1960-82 8-31-82 12.02 228 Stream near sec.28, T.113 N., R.23 W., Scott New Prague, MN County, Hydrologlc Unit 07020012, at culvert on county road, 1.6 miles upstream from mouth, and 2.3 miles northwest of New Prague. 05330600 Sand Creek tribu­ Lat 44°37'45", long 93°36'33", in 2.62 1960-82 3-29-82 e!3.6l 18 tary No. 2 near NWJNEJ sec.5, T.113 N., R.23 W., Jordan, MN Scott County, Hydrologic Unit 07020012, at culvert on State High­ way 21, 0.8 mile upstream from mouth, and 2.8 miles south of Jordan. St. Croix River basin 05336200 Glalsby Brook Lat 46°27'19", long 92°51'34", in 24.2 1960-70#, 4-16-82 8.85 1,040 near Kettle SEJNW4 sec.22, T.46 N., R.20 W., 1971-82 River, MN Carlton County, Hydrologic Unit 07030003, at bridge on State High­ ways 27 and 73, 1.0 mile upstream from mouth, and 2.4 miles south of Kettle River. 05336550 Wolf Creek Lat 46°09'45", long 92°51'58", in 5.46 1960-82 4-15-82 el6.94 58 tributary near NEJSEJ sec.33, T.43 N., R.20 W., Sandstone, MN Pine County, Hydrologic Unit 07030003. at culvert on U.S. High­ way 6l, 0.2 mile upstream from mouth, and 2.2 miles north of Sandstone. i 05338200 Mission Creek Lat 45°59'52", long 92°56'44", in 3.84 1960-82 9-10-82 13.90 near Hinckley, SW4SW4 sec.25, T.41 N., R.21 W., MN Pine County, Hydrologic Unit 07030004. at culvert on U.S. High­ way 23, 1.2 miles south of Hlnckley. 05338500 Snake River near Lat 45°50'30", long 92°s56'00", in 958 1913-17, 4-12-82 7.48 6,100 Pine City, MN SEJNWJ sec.26, T.39 N., R.21 W., 1951-8l#, Pine County, Hydrologic Unit 1982 07030004, on left bank at site of former powerplant and dam, 0.5 mile downstream from Cross Lake and 1.5 miles northeast of Pine City. 'See footnotes at end of the table.' 301 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES Annual maxirnum discharge at high-flow partial-record stations during water year 1982 Annual maximum Drainage Period Gage Dis- Station Station name Location area of Date height charge No. Record (feet) (ftVs) Cannon River basin 05352700 Turtle Creek Lat 44°00'02", long 93°08'30", in 1.26 1960-82 7- 7-82 16.50 tributary NW4SW4 sec.8, T.106 N., R.19 W., No. 2 near Steele County, Hydrologic Unit Pratt, MN 07040002, at culvert on U.S. High­ way 218, 1.0 mile upstream from mouth, and 1.7 miles southeast of Pratt. 05352800 Turtle Creek Lat 44°00'26", long 93°12'20", in 5.01 1960-82 3-16-82 e8.59 135 tributary near NW4NW4 sec.11, T.106 N., R.20 W., Steele Center, Steele County, Hydrologic Unit MN 07040002, at culvert on township road, 1.3 miles upstream from mouth, and 1,6 miles northeast of Steele Center. 05355024 Cannon River at Lat 44°27'19", long 93°09'46", in 934 1980-82 5-31-82 903.28 3,400 Northfield, MN NE4NE4 sec.l, T.lll N., R.20 W., Rice County, Hydrologic Unit 07040002, on left bank at down­ stream side of Fifth Street bridge in Northfield. 05355100 Little Cannon Lat 44°20'45n , long 92°58'47", in 2.20 1960-82 3-16-83 11.91 65 River tributary NE4SE4 sec.9, T.110 N., R.18 W., near Kenyon, MN Goodhue County r Hydrologic Unit 07040002, at culvert on State High­ way 56, 0.3 mile upstream from mouth, and 5.3 miles north of Kenyon. 05355200 Cannon River at Lat 44°33'50", long 92°43'55", in 1,320 1909-I4#, 5-31-32 7.10 3,980 Welch, MN NW4SW4 sec.27, T.113 N., R.16 W., 1930-71*, Goodhue County, Hydrologic Unit 1973-82 07040002, on right bank 0.3 mile downstream from highway bridge at Welch, and 1.8 miles upstream from Belle Creek. Zumbro River basin 05372800 South Pork Zumbro Lat 44°00'26", long 92°28'19", in 155 1969-82 5-31-82 996.78 1,470 River on Belt SE4SW4 sec.2, T.106 N., R.14 W., Line at Olmsted County, Hydrologic Unit Rochester, MN 07040004, at bridge on west-bound lane of U.S. Highway 14 at Rochester, and 1.5 miles upstream from Bear Creek. 05372930 Bear Creek on Lat 44°00'29", long 92°26'44", in 80.0 1969-82 5-31-82 d996.96 712 Belt Line at sec.l, T.106 N., R.14 W., Olmsted Rochester, MN County, Hydrologic Unit 07040004, at bridge on west-bound lane of U.S. Highway 14 at Rochester, and 1.2 miles upstream from mouth. 05372950 Silver Creek at Lat 44°01'44", long 92O 25'44", near 17.3 1969-82 5-31-82 10.27 350 Rochester, MN center of sec.31, T. 107 N., R.13 W., Olmsted County, Hydrologic Unit 07040004, at bridge on county high­ way at east edge of Rochester, and 1.7 miles upstream from mouth. 05372990 Cascade Creek at Lat 44°01'41", long 92°29'03", in 37.0 1969-82 5-31-82 992.48 381 Rochester, MN NW4SE4 sec.35, T.107 N., R.14 W., Olmsted County, Hydrologic Unit 07040004, at bridge on 16th Street NW at Rochester, and 1.5 miles upstream from mouth. 05373080 Milliken Creek Lat 44°07'13", long 92°49'08", in 22.2 1979-82 5-31-82 14.50 t near Concord, NW4NW4 sec.36, T.108 N., R.17 W., MN Dodge County, Hydrologic Unit 07040004, at bridge on County Road 9, 8.0 miles upstream from mouth, 2.1 miles southeast of Concord. 05373350 Zumbro River Lat 44°ll'l6", long 92°25'22", in .16 1962-82 3-16-82 e9.39 20 tributary near SE4NE4 sec.6, T.108 N., R.13 W., South Troy, MN Olmsted County, Hydrologic Unit 07040004, at culvert on county road, 0.8 mile upstream from mouth, and 1.3 miles south of South Troy. "See footnotes at end of the table." 302 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES Annual maximum discharge at high-flow partial-record stations during water year 1982 Annual maximum Drainage Period Gage Dis- Station Station name Location area of Date height charge No. (mi 2 ) Record (feet) (ft 3 /s) Zumbro River basin--Continued 05373700 Spring Creek near Lat 44°17'13", long 92°52'17", in 9-93 1960-82 5-12-82 10.60 400 Wanamingo, MN SE4SEJ sec.32, T.110 N., R.17 W., Goodhue County, Hydrologic Unit 07040004, at culvert on County High­ way 1, 3-5 miles upstream from mouth, and 4.2 miles southwest of Wanamingo. 05373900 Trout Brook Lat 44°21'30", long 92°36'58", in .40 1960-82 4-17-82 5.36 25 tributary near NE4SE4 sec.4, T.110 N., R.15 W., Qoodhue, MN Goodhue County, Hydrologic Unit 07040004, at culvert on State High­ way 58, 0.8 mile upstream from mouth, and 3-0 miles south of Goodhue. 05374400 Long Creek near Lat 44°10'48", long 92°17'23", at 4.46 1966-82 5-16-82 el4.80 76 Potsdam, MN quarter corner on north line of sec.8, T.108 N., R.12 W., Wabasha County, Hydrologic Unit 07040004, at culvert on county highway, 2.6 miles northeast of Potsdam. Whitewater River basin 05376500 South Pork White- Lat 44°04'10", long 91°58'49", in SE4 76.8 1939-71#, 3-23-82 d2.26 197 water River sec.14, T.107 N., R.10 W., Winona 1973-82 near Altura, County, Hydrologic Unit 07040003, MN on left bank 500 ft upstream from highway bridge, 2.0 miles west of Altura, and 2.4 miles upstream from Keefer Creek. Root River basin 05383600 North Branch Root Lat 43°51'20", long 92°26'50", near .73 1958, 3-16-82 e8.51 27 River tributary center sec.36, T.105 N., R.14 W., 1959-64*, near Stewart- Olmsted County, Hydrologic Unit 1965-82 ville, MN 07040008, at culvert on State Highway 30, 2.0 miles east of Stewartville, and 2.3 miles upstream from mouth. 05383720 Mill Creek near Lat 43°53'01", long 92°13'46", in 22.4 1962-82 5-12-82 12.17 900 Chatfield, MN SE4NW4 sec.23, T.105 N., R.12 W., Olmsted County, Hydrologic Unit 07040008, at bridge on county highway, 3.4 miles northwest of Chatfield, and 4.8 miles upstream from mouth. 05383850 South Pork Bear Lat 43°43'24", long 92°35'24", in 14.0 1962-82 5- 4-82 18.44 970 Creek near NE4SEJ sec.14, T.103 N., R.15 W., Grand Meadow, Mower County, Hydrologic Unit MN 07040008, at bridge on county high­ way, 1.5 miles northwest of Grand Meadow, and 4.0 miles upstream from North Pork Bear Creek. 05384100 Duschee Creek Lat 43°39'40", long 91°58'10", in 3-85 195^-82 3-17-82 e!3.45 29 near Lanesboro, SWJSW4 sec.6, T.102 N., R.9 W., MN Pillmore County, Hydrologic Unit 07040008, at culvert on county high­ way, 4 miles south of Lanesboro, and 7.4 miles upstream from mouth. 05384120 South Branch Root Lat 43°43'19", long 91°58'43", in a297 1973-82 5_ 6-82 7.29 2,200 River at NWJSEJ sec.13, T.103 N., R.10 W., Lanesboro, MN Pillmore County, Hydrologic Unit 07040008, at bridge to ball park in Lanesboro, and 2.5 miles upstream from mouth. 05384200 Gribben Creek Lat 43 0 42'26», long 91°54'50", in 7.80 1959-82 5- 6-82 dl4.06 24 near Whalan, NEJSE4 sec.21, T.103 N., R.9 W., MN Pillmore County, Hydrologic Unit 07040008, at bridge on county high­ way, 1.9 miles southeast of Whalan, and 2.4 miles upstream from mouth. 05384400 Pine Creek near Lat 43°50'27", long 91°53'39", in 28.1 1959-82 5-19-82 10.14 78 Arendahl, MN SEJNEJ sec.3, T.104 N., R.9 W., Pillmore County, Hydrologic Unit 07040008, at bridge on County High­ way 25, 1.3 miles northeast of Arendahl, and 4.9 miles upstream from Hemingway Creek. "See footnotes at end of the table. 1 303 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES Annual maximum discharge at high-flow partial-record stations during water year 1982 Annual maximum Drainage Period Gage Dis- Station Station name Location area of Date height charge No. Record (feet) (ftVs) Root River basin—Continued 05384500 Rush Creek near Lat 43°50'00", long 91°46'40", on 129 1942-79*. 3-17-82 h600 Rushford, MN line between sees.3 and 10, T.104 1980-82 N., R.8 W., Fillmore County, Hydro- logic Unit 07040008, on downstream side near center of span of highway bridge, 1.5 miles northwest of Rush- ford, 3.0 miles upstream from mouth. Crooked Creek basin 05387030 Crooked Creek at Lat 430 36'37", long 91°21'39", in 44.2 1979-82 5- 7-82 h25 Freeburg, MN SWiNEj sec.30, T.102 N., R.4 W., Houston County, Hydrologic Unit 07060001, on right downstream wing- wall of bridge on State Highway 249 at Freeburg, 6.5 miles upstream from mouth. Iowa River basin 05457080 Rose Creek Lat 43°42'11", long 92°44'35", in 1.17 1962-82 5- 6-82 d9.39 130 tributary near SEJSW4 sec.22, T.103 N., R.16 W., Dexter, MN Mower County, Hydrologic Unit 07080201, at culvert on county high­ way, 0.2 mile upstream from mouth, and 2.2 miles southwest of Dexter. Des Moines River basin 05474750 Beaver Creek Lat 43°59'35", long 95°48'01", in 3-53 1961-82 5-30-82 18.60 135 tributary No. 2 NWJNWJ sec.17, T.106 N., R.41 W., near Slayton, Murray County, Hydrologic Unit MN 07100001, at culvert on State High­ way 30, 2.4 miles west of Slayton, and 3.2 miles upstream from mouth. 05474760 Beaver Creek Lat 43°59'35", long 95°47'12", in 2.20 1961-82 5-30-82 d!9.55 79 tributary above NEJNEJ sec.17, T.106 N., R.41 W., Slayton, MN Murray County, Hydrologic Unit 07100001, at culvert on State High­ way 30, 0.9 mile upstream from mouth, and 1.7 miles west of Slayton. 05475400 Warren Lake Lat 43°54'02", long 95°07'13", in 1.39 1960-82 5-17-82 d4.26 12 tributary near SEJNEJ sec.14, T.105 N., R.36 W., Windom, MN Cottonwood County, Hydrologic Unit 07100001, at culvert on U.S. Highway 71, 0.2 mile upstream from Warren Lake, and 2.4 miles north of Windom. 05475800 Des Moines River Lat 43°41'36", long 95°01'26", in 1.52 1960-82 5-17-82 d!3.09 6.2 tributary near NW4SE4 sec.27, T.103 N., R.35 W., Jackson, MN Jackson County, Hydrologic Unit 07100001, at culvert on county high­ way, 0.8 mile upstream from mouth, and 5.3 miles north of Jackson. 05475900 Des Moines River Lat 43°40'28", long 95°03'15", in 5.18 1960-82 5-17-82 d7.36 100 tributary No. 2 SEJSEJ sec.32, T.103 N., R.35 W., near Lakefield, Jackson County, Hydrologic Unit MN 07100001, at culvert on County High­ way 19, 1.9 miles upstream from mouth, and 5.8 miles east of Lakefield. 05476900 Fourmile Creek Lat 43°34'57", long 94°46'26", in 14.0 1960-82 5-27-82 11.98 180 near Dunnell, SWJNWJ sec.2, T.101 N., R.33 W., MN Martin County, Hydrologic Unit 07100003, at bridge on State High­ way 4, 0.6 mile upstream from mouth, and 1.6 miles north of Dunnell. Big Sioux River basin 06482933 Chanarambi Creek Lat 43°53'59", long 96°03'39", in 56.1 1979-82 7-15-82 J13.01 140 near Edgerton, NWJSW4 sec.18, T.105 N., R.43 W., MN near Murray and Pipestone County line, Hydrologic Unit 10170204, at right downstream wingwall of bridge on township road, 3.8 miles north­ east of Edgerton, 7.4 miles upstream from mouth. "See footnotes at end of the table." 304 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES Annual maximum discharge at high-flow partial-record stations during water year 1982 Annual maximum Drainage Period Gage Dis- Station Station name Location area of Date height charge No. (mi 2 ) Record (feet) (ftVs) Big Sioux River basin--Continued 06482950 Mound Creek near Lat 43 0 48'18", long 96°12'47", in SE4 2.47 1959-82 9-10-82 6.84 13 Hardwick, MN SE4 sec.15, T.104 N., R.45 W., Rock County, Hydrologic Unit 10170204, at culvert on county highway, 2.2 miles northwest of Hardwick. 06482960 Mound Create Lat 43°46'05", Ions 96°12'44", in NE4 .19 1959-82 9-10-82 7.28 63 tributary at SE4 sec.34, T.104 N., R.45 W., Rock Hardwick, MN County, Hydrologic Unit 10170204, at culvert on U.S. Highway 75, 0.7 mile upstream from mouth, and 0.9 mile southwest of Hardwick. 06483000 Rock River at Lat 43°39'15", long 96°12'03", in 425 1911-1W, 2-22-82 e7.54 1,150 Luverne, MN SW4NE4 sec.11, T.109 N., R.45 W., 1972-82 Rock County, Hydrologic Unit 10170204, at bridge on Main Street (County Highway 4) in Luverne. 06483210 Kanaranzi Creek Lat 43°43'32", long 95°52'20", in 2.14 1966-82 5-14-82 5.34 110 tributary No. SW4NW4 sec.15, T.103 N., R.42 W., near Wilmont, Nobles County, Hydrologic Unit MN 10170204, at culvert on County High­ way 15, 3-5 miles southwest of Wilmont, and 3-7 miles upstream from mouth. Little Sioux River basin 06603530 Little Sioux Lat 43°36'08", long 95O 15'27", in 41.1 1962-82 5-17-82 7.70 125 River near NE4NE4 sec.34, T.102 N., R.37 W., Spafford, MN Jackson County, Hydrologic Unit 10230003, at bridge on county high­ way, 1.6 miles downstream from Jackson County ditch No. 11, and 5.8 miles east of Spafford. # Operated as a continuous-record gaging station. t Discharge not determined. a approximately. b Backwater from aquatic growth. c Revised. d Affected by shifting control. e Backwater from ice. f Peak stage did not reach bottom of gage. g Backwater from temporary rock dam. h Estimated. i Not previously published. j Affected by beaver dam. k Operated as a miscellaneous water-quality station. 305 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES

Discharge measurements at miscellaneous sites

Measurements of streamflow at points other than gaging stations are given in the following table. The measurements of base flow are designated by an asterisk (*); measurements of peak flow by a dagger (t).

Discharge measurements made at miscellaneous sites during water year 1982

Measured Measurements Drainage previously Stream Tributary to Location area (water Date Discharge (mi 2 ) years) (ftVs)

Mississippi River main stem

Mississippi Gulf of Lat 47°15'00", long 93°35'12", in a3,36o 1929-30, 5-16-82 2,790 River Mexico Ni sec.13, T.155 N., R.26 W., 1944-45, Itasca County, Hydrologic Unit 1948-55, 07010103, at dam at outlet of 1957-75, Pokegama Lake, 3-5 miles north­ west of Grand Rapids, MN (05210700).

Rum River basin bLake George Lake George Lat 45°21'39", long 93°19'32", in i\- 5-82 18 Inlet NW4SW4 sec.10, T.33 N., R.24 W., 4- 6-82 2.6 Anoka County, Hydrologic Unit 4- 7-82 1.4 07010207, at weir on Lake George 4-16-82 0.9 Drive, northeast side of lake, 4-17-82 1.4 near Oak Grove, MN. 4-22-82 0.9 4-29-82 0.2 5- 5-82 1.2 5-13-82 1.0 5-18-82 2.3

Mississippi River main stem

Mississippi Gulf of Lat 44°58'46", long 93°14'50", in a!9,700 1912, 4-22-82 41,300 River Mexico SEJSEJ sec.23, T.29 N., R.24 W., 1938-39, 9_ 9-82 4,000 Hennepin County, Hydrologic Unit 1941, 07010206, at lower St. Anthony Palls 1943, lock and dam in Minneapolis, MN, at 1953-54, River Mile 853-3 upstream from Ohio 1957, River. (Discharge measurements made 1963-81 between Hennepin Avenue and Franklin Avenue bridges over the Mississippi River are included). (05288920)

Mississippi Gulf of Lat 44°54'57", long 93°11'59", in a!9,700 1924, 10-20-81 14,400 River Mexico NEJNWJ sec.17, T.28 N., R.23 W., Ram- 1935, 9-30-82 4,140 sey County, Hydrologic Unit 07010206, 1938-39, at Ford Motor Company hydroelectric 1941, plant, 800 ft downstream from Ford 1943, Parkway bridge in St. Paul, MN, 3.5 1945-50, miles upstream from Minnesota River, 1954, and at River mile 847.6 upstream from 1957, Ohio River (05288950). 1959, 1961-62, 1964-70, 1972-81

Minnesota River basin

Chippewa River Minnesota Lat 45°01'30", long 95°48'00", in SE4 1945-81 10- 6-81 81 diversion River sec.l6, T.118 N., R.4l W., Chippewa 11-19-81 114 County, Hydrologic Unit 07020001, 1 12-22-81 28 mile north of Watson, MN. 4- 2-82 2,560 7- 1-82 216 8-13-82 84

Chippewa Minnesota Lat 45°01'10", long 95°47'30", in NW4 1945-81 10- 6-81 31 River below River sec.22, T.118 N., R.41 W., Chippewa 11-19-81 54 diversion County, Hydrologic Unit 07020005, 1.4 12-22-81 49 miles northeast of Watson, MN. 2-26-82 32 4- 2-82 1,080 7- 1-82 43 8-13-82 17 'See footnotes at end of table.' 306 DISCHARGE AT PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES

Discharge measurements made at miscellaneous sites during water year 198l--Continued

Measured Measurements Drainage previously Stream Tributary to Location area (water Date Discharge (mi*)t 2-i years) (ftVs)

Minnesota River basin--Continued bLake Riley Riley Creek Lat 44°49'54", long 93°31'01", in n- 1-82 12 outlet NW4NW4 sec.30, T.116 N. , R.22 W., 4- 2-82 12 Hennepin County, Hydrologic Unit 4- 4-82 15 07020012, at dam near end of 4- 5-82 14 Lakeland Terrace, 0.75 miles east 4- 6-82 14 of State Highway 101 on Pioneer 4- 8-82 16 Trail, 2 miles south of intersection 4-12-82 14 of State Highways 5 and 101 near 4-16-82 13 Chanhassen, MN. 4-22-82 6.6 4-29-82 12 5- 4-82 3.5 5-10-82 4.6 5-18-82 6.1 5-25-82 4.2 6- 8-82 0.4

St. Croix River basin

St. Croix Mississippi Lat 44°44'57", long 92°48'l6", in a7,650 1928-30, 4-14-82 12,900 River River SE4SEJ sec.9, T.26 N., R.20 W., 1932-39, Pierce County, Hydrologic Unit 1947-48, 07030005, at bridge in Prescott, 1950, WI, 0.1 mile upstream from mouth 1953-57, (05344490). 1959-80 bEagle Point Eagle Point Lat 44°59'19", long 92°55'25", in 3-29-82 8.1 Lake inlet Lake NW4NW4 sec.22, T.29 N., R.21 W., 3-30-82 36 Washington County, Hydrologic 3-31-82 12 Unit 07010206, at old bridge on 4- 1-82 6.0 Ivy Avenue North, downstream 4- 2-82 3.8 from 28th Street North bridge, 4- 4-82 2.0 near Lake Elmo, MN. 4- 5-82 1.6 4- 6-82 1.2 4- 8-82 0.2 4-17-82 1.3 4-18-82 0.0 5-13-82 4.3 5-18-82 2.4

a Approximately. b Operated as a miscellaneous water-quality station. 307 ANALYSES OF SAMPLES COLLECTED AT rfATER-QUALITY PARTIAL-RECORD STATIONS Water-quality partial-record stations are particular sites where chemical-quality, biological and (or) sediment data are collected systematically over a period of years for use in hydrologic analyses.

444717093083100 HOLLAND LAKE AT EAGAN, MN

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

SPE­ SOLIDS, CIFIC TRANS­ CHLO­ RESIDUE CON­ PAR­ RIDE, AT 105 SAM­ RESER­ DUCT­ ENCY DIS­ DEG. C, PLING VOIR ANCE (SECCHI SOLVED SUS­ TIME DEPTH DEPTH LAB DISK) (MG/L PENDED DATE (FEET) ( FEET ) (UMHOS) (M) AS CL) (MG/L) (00003) (72025) (90095) (00078) (00940) (00530) JUL 26... 1215 1.00 51 169 2.40 9.7 2 26... 1230 49-9 281 — 10 17 AUG 24. .. 1130 1.00 >50 162 1.80 9.1 2 24... 1145 55.0 274 9.5 19

NITRO­ NITRO­ CHLOR-A CHLOR-B SOLIDS, GEN, GEN, AM­ PHOS­ PHYTO- PHYTO- VOLA­ N02+H03 MONIA + PHOS­ PHORUS, PLANK- PLANK- TILE, DIS­ ORGANIC PHORUS, DIS­ TON TON SUS­ SOLVED TOTAL TOTAL SOLVED CHROMO CHROMO PENDED (MG/L (MG/L (MG/L (MG/L FLUOROM FLUOROM DATE (MG/L) AS N) AS N) AS P) AS P) (UG/L) (UG/L) (00535) (00631) (00625) (00665) (00666) (70953) (70954) "UL 26... 1 <.10 1.20 .030 .010 10.0 <.100 26... 9 <.10 3.00 .650 .460 — — lUui TIP 24. .. 1 <.10 .60 .050 .010 10.0 <.100 24... 9 <.10 3.70 .840 .740 — —

OXYGEN, SPE­ DIS­ CIFIC SOLVED SAM­ CON­ OXYGEN, (PER­ PLING DUCT­ PH TEMPER­ DIS­ CENT TIME DEPTH ANCE ATURE SOLVED SATUR­ DATE (FEET) (UMHOS) (UNITS) (DEG C) (MQ/L) ATION) (00003) (00095) (00400) (00010) (00300) (00301) JUL 26... 1215 1.00 160 8.2 27.0 7.8 100 26... 1216 3.90 165 — 27.0 7.8 100 26... 1217 10.5 180 — 23.5 9.5 114 26... 1218 17.1 200 — 12.5 7.0 67 26... 1219 20.3 200 — 8.5 .2 2 26... 1220 26.9 240 — 5.5 .1 0 26... 1230 49.9 332 7.0 4.5 <.l 0 AUG 24... 1130 1.00 166 9-0 24.0 8.7 106 24... 1131 3.00 166 24.0 8.7 106 24. .. 1132 6.00 166 — 24.0 8.6 105 24... 1133 9.00 166 — 24.0 8.6 105 24... 1134 12.0 181 — 21.5 7.5 87 24... 1136 15-0 205 — 17.0 2.6 28 24... 1138 18.0 209 — 12.0 .7 6 24... 1139 21.0 211 — 9.0 .6 5 24... 1140 24.0 228 — 7.0 .0 0 24... 1141 30.0 244 7.4 5.5 .0 0 24... 1142 40.0 267 — 5.0 .0 0 24... 1143 50.0 283 — 5.0 .0 0 24... 1145 55.0 289 7.1 5.0 .0 0 308 ANALYSES OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS

444735093100900 THOMAS LAKE AT EAGAN, MN

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

SPE­ SOLIDS, CIFIC TRANS­ CHLO­ RESIDUE CON­ PAR­ RIDE, AT 105 SAM­ RESER­ DUCT­ ENCY DIS­ DEG. C, PLING VOIR ANCE (SECCHI SOLVED SUS­ TIME DEPTH DEPTH LAB DISK) (MG/L PENDED DATE (FEET) (FEET) (UMHOS) (M) AS CL) (MG/L) (00003) (72025) (90095) (00078) (00940) (00530) JUL 27... 1255 1.00 6 205 .50 28 2 AUG 24... 1330 1.00 5 .20 29 8

NITRO­ NITRO­ CHLOR-A CHLOR-B SOLIDS, GEN, GEN , AM­ PHOS­ PHYTO- PHYTO- VOLA­ N02+N03 MONIA + PHOS­ PHORUS, PLANK- PLANK- TILE, DIS­ ORGANIC PHORUS, DIS­ TON TON SUS­ SOLVED TOTAL TOTAL SOLVED CHROMO CHROMO PENDED (MG/L (MG/L (MG/L (MG/L FLUOROM FLUOROM DATE (MG/L) AS N) AS N) AS P) AS P) (UG/L) (Uff/L) (00535) (0063D (00625) (00665) (00666) (70953) (70954) JUL 27... 1 <.10 1.70 .130 .020 100 1.30 AUG 24... 6 <.10 3-90 .200 <.010 210 <.100

OXYGEN, SPE­ DIS­ CIFIC SOLVED SAM­ CON­ OXYGEN, (PER­ PLING DUCT- PH TEMPER­ DIS­ CENT TIME DEPTH ANCE ATURE SOLVED SATUR­ DATE (FEET) (UMHOS) (UNITS) (DEG C) (MG/L) ATION) (00003) (00095) (00400) (00010) (00300) (00301) JUL 27... 1255 00 213 10.0 26.5 13.2 168 27... 1256 30 213 25.5 12.2 152 27... 1257 50 213 24.5 5.6 AUG 24... 1330 00 217 9-2 22.0 72 24... 1331 00 219 9.2 22.0 72 24... 1332 4.50 220 9.2 22.0 6.1 72 309 ANALYSES OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS

444912093110000 BLACKHAWK LAKE AT EAGAN, MN

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

SPE­ SOLIDS, CIFIC TRANS­ CHLO­ RESIDUE CON­ PAR­ RIDE, AT 105 SAM­ RESER­ DUCT­ ENCY DIS­ DEG. C, PLING VOIR ANCE (SECCHI SOLVED SUS­ TIME DEPTH DEPTH LAB DISK) (MG./L PENDED DATE (PEST) ( PEET ) (UMHOS) (M) AS CL) (MG/L) (00003) (72025) (90095) (00078) (00940) (00530) JUL 28... 1000 1.00 6 212 .70 17 2 AUG 25... 1030 1.00 6 199 .140 17 7

NITRO­ NITRO­ CHLOR-A CHLOR-B SOLIDS, GEN, GEN, AM­ PHOS­ PHYTO- PHYTO- VOLA­ N02+N03 MONIA + PHOS­ PHORUS, PLANK- PLANK- TILE, DIS­ ORGANIC PHORUS, DIS­ TON TON SUS­ SOLVED TOTAL TOTAL SOLVED CHROMO CHROMO PENDED (MG/L (MG/L (MG/L (MG/L PLUOROM PLUOROM DATE (MG/L) AS N) AS N) AS P) AS P) (UG/L) (UG/L) (00535) (0063D (00625) (00665) (00666) (70953) (7095^) JUL 28... 1 <.10 1.60 .060 .020 22.0 <.100 AUG 25... 5 <.10 1.90 .100 .010 39.0 <.100

OXYGEN, SPE­ DIS­ CIFIC SOLVED SAM- CON- OXYGEN, (PER­ PLINQ DUCT- PH TEMPER- DIS- CENT TIME DEPTH ANCE ATURE SOLVED SATUR­ DATE (PEET) (UMHOS) (UNITS) (DEG C) (MG/L) ATION) (00003) (00095) (00400) (00010) (00300) (00301) JUL 28... 1000 1.00 — 9-1 26.5 9.8 124 28... 1004 3.00 — — 26.0 9.5 119 28... 1006 6.00 — — 25.5 5.9 73 AUG 25... 1030 1.00 204 9.2 23.5 7.6 91 25... 1031 3.00 196 9.2 22.5 6.5 76 25... 1032 5.60 188 9.1 21.5 5.6 64 310 ANALYSES OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS

444923093095800 PISH LAKE AT EAGAN, MN

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

SPE­ SOLIDS, CIFIC TRANS­ CHLO­ RESIDUE CON­ PAR­ RIDE, AT 105 SAM­ RESER­ DUCT­ ENCY DIS­ DEG. C, PLING VOIR ANCE (SECCHI SOLVED SUS­ TIME DEPTH DEPTH LAB DISK) (MG/L PENDED DATE (FEET) ( FEET ) (UMHOS) (M) AS GL) (MG/L) (00003) (72025) (90095) (00078) (00940) (00530) JUL 27... 0940 1.00 30 175 2.60 16 2 27... 0950 26.2 — 359 — 30 22 AUG 24... 1500 1.00 30 — 2.80 16 <1 24... 1515 29.0 285 22 8

NITRO­ NITRO­ CHLOR-A CHLOR-B SOLIDS, GEN, GEN, AM­ PHOS­ PHYTO- PHYTO- VOLA­ N02+N03 MONIA + PHOS­ PHORUS, PLANK- PLANK- TILE, DIS­ ORGANIC PHORUS, DIS­ TON TON SUS­ SOLVED TOTAL TOTAL SOLVED CHROMO CHROMO PENDED (MG/L (MG/L (MG/L (MG/L FLUOROM FLUOROM DATE (MG/L) AS N) AS N) AS P) AS P) (UG/L) (UG/L) (00535) (00631) (00625) (00665) (00666) (70953) (70954) JUL 27... 1 <.10 .80 .020 .020 12.0 1.30 27... 19 <.10 3.30 .080 .020 — _- AUG 24... <1 <.10 .50 .020 <.010 6.30 <.100 24... 2 <.10 .90 .070 .010 — —

OXYGEN, SPE­ DIS­ CIFIC SOLVED SAM­ CON­ OXYGEN, (PER­ PLING DUCT­ PH TEMPER­ DIS­ CENT TIME DEPTH ANCE ATURE SOLVED iSATUR- DATE ( FEET ) (UWIHOS) (UNITS) (DEG C) (MG/L) lATION) (00003) (00095) (00400) (00010) (00300) (00301) JUL 27... 0940 1.00 183 7.9 26.0 7.4 93 27... 0941 3.30 183 — 25.5 7.5 94 27... 0942 6.60 — — 25.5 7.7 96 27... 0943 8.20 — — — 4.6 27... 0944 9.80 — — 25.5 4.0 50 27... 0945 11.5 — — — 6.8 — 27... 0946 13.1 — — 21.5 8.2 95 27... 0947 14.8 — — — 3.1 -- 27... 0948 16.4 — — 16.5 .4 4 27... 0949 19.7 — — 12.5 .1 <1 27... 0950 26.2 354 7.2 7-5 <.l <1 27... 0951 29.5 384 6.5 <.l <1 AUG 24... 1500 1.00 205 8.7 24.0 7.6 92 24... 1501 3.00 205 — 24.0 7.5 91 24... 1502 6.00 206 — 23.5 7.4 89 24... 1503 9.00 204 — 23.5 7.0 84 24... 1504 12.0 212 — 22.5 3.6 42 24... 1505 15.0 248 — 20.0 2.2 25 24... 1506 18.0 280 7.8 15.5 1.3 13 24... 1508 21.0 294 11.0 1.2 11 24. .. 1510 24.0 343 — 9.0 1.2 11 24.. . 1512 27.0 399 -- 7.5 1.1 9 24... 1515 29.0 425 7.4 7.5 1.0 9 311 ANALYSES OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

OXYGEN , SPE- TRANS- DIS­ CIFIC PAR- SOLVED SAM- RESER- CON- ENCY OXYGEN, (PER­ PLINr, VOIR DUCT- PH TEMPER- (SECCHI DIS­ CENT TIME DEPTH DEPTH A.'JCE ATURE DISK) SOLVED SATUR­ DATE (PEEP) (PSET) (UMHOS) (UNITS) (DEG C) (M) (MG/L) ATION) (00003) (72025) (00095) (00400) (00010) (00078) (00300) (00301) 444640093094700 JENSEN LAKE AT EAGAN, MN JUL 1982 30... 0830 1.00 6 160 8.8 24.5 .52 7.0 85 30... 0832 2.90 — 160 8.8 24.5 6.8 83 30... 0834 4.80 — 160 — 24.5 6.1 74 AUG 24... 1100 1.00 5 179 7-8 23.0 .48 7.3 87 24.. . 1101 2.70 — 179 7.8 23.0 7.2 86 24... 1102 5.00 — 179 7.8 23.0 7.2 86

444652093131000 SLATER'S ACRES POND AT EAGAN, MN JUL 1982 28... 1245 27.5 5 130 9-3 27.5 1.13 9.1 118 28... 1250 3.28 — — — 25.5 <4.0 <50 AUG 26... , 0940 1.00 4 204 8.4 22.0 1.18 7.6 89 26... 0945 3.00 — 203 8.3 21.5 8.0 93

444733093120900 BOESEL POND AT EAGAN, MN JUL 1982 28... 1325 1.00 7 — — 29.0 .46 11.4 152 28... 1330 3.28 — — — 25-0 .6 7 28... 1335 6.23 — — — 22.5 .2 2 AUG 26... 1025 .50 — — — 22.5 10.9 128 26... 1030 1.00 7 133 10.2 22.0 .09 10.5 124 26... 1035 3.00 — 122 9.9 22.0 6.8 80 26... 1040 5.00 — 125 9-6 21.0 .6 7

444738093065200 LAKESIDE ESTATE LAKE AT EAGAN, MN JUL 1982 30... 0945 1.00 5 210 8.9 24.0 .27 6.0 72 30... 0947 2.65 — 210 8.9 23.5 5.8 69 30... 0950 4.30 — 210 8.6 23.5 5.6 67 AUG 26... 1325 1.00 8 232 9.3 24.5 .24 9.7 119 26... 1327 3.00 — 236 8.7 22.5 5.2 61 26... 1329 6.00 — 237 8.6 22.0 2.4 28 26... 1331 7.00 — 310 — 21.0 .8 9

444745093095700 WILDERNESS LAKE AT EAGAN, MN JUL 1982 27... 1415 1.00 5 254 9.9 26.0 .21 9-8 123 AUG 24... 1350 1.00 5 263 9-4 23.5 1.60 10.9 131 24... 1351 2.30 — 266 — 23.0 10.8 129 24... 1352 4.00 — 265 9-4 23.0 10.0 119

444821093124500 CEDAR GROVE POND AT EAGAN, MN JUL 1982 28... 1130 1.00 6 190 9-2 26.5 .21 12.4 159 28... 1135 3.28 — — — 24.5 6.3 78 28... 1140 5.91 -- — — 21.5 .5 6 AUG 26... 1120 1.00 6 235 8.8 23.0 .15 6.9 82 26... 1125 2.50 — 235 8.0 22.0 2.3 27 26... 1130 5.00 -- 288 6.9 21.0 .8 9

444843093090500 MCCARTHY LAKE AT EAGAN, MN JUL 1982 30... 1043 1.00 2 230 7.8 25.0 2.20 3.9 48 AUG 27... 0001 1.00 -- 248 7-6 18.5 2.8 31 27... 0002 2.00 — 248 7.6 18.5 1.4 15 CM O t— O CM ,-! CM CO O\

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moo I-H o ,-H CM m\CO t-H O .-I CM -=r -=r m ro roro t-i in CM ro ro on o o o t—i i—i i-i mm ro CM CM CM 313 ANALYSTS OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS '411410096251001 FLORIDA CREEK NEAR BURR, MN WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPE­ BARO­ OXYGEN, COLI- SPE­ CIFIC METRIC DIS­ FORM, STREAM- CIFIC CON­ PH PRES­ SOLVED FECAL, PLOW, CON­ DUCT­ PH LAB SURE OXYGEN, (PER­ 0.7 INSTAN­ DUCT­ ANCE (STAND­ (STAND­ (MM TEMPER­ DIS­ CENT UM-MF TIME TANEOUS ANCE LAB ARD ARD OP ATURE SOLVED SATUR­ (COLS./ DATE (CPS) (UMHOS) (UMHOS) UNITS) UNITS) HG) (DEG C) (MG/L) ATION) 100 ML) (00061) (00095) (90095) (00400) (00403) (00025) (00010) (00300) (00301) (31625) MAR Oil.., 1530 E10 633 620 7.9 726 .0 11.6 83 17... 1230 20 373 7.8 .5 31.., 1640 67 337 7.7 7.8 726 1.0 K320 APR 01. ., 1345 48 317 726 1.5 12.1 91 02... 1615 86 364 — 705 2.5 11.4 90 — 02. ., 1835 97 15... 1300 15 617 596 8.1 E720 15.0 10.6 MAY 25... 1505 2.7 804 807 — 8.4 E720 16.0 9.1 — — JUN 10. ., 1105 3.4 ~ — — 23... 1355 .47 — — — — — — JUL 07-. 1440 4.2 700 704 8.2 8.2 E720 24.5 9.1 — 600 AUG 01... 1430 .89 774 754 — 8.3 E720 26.5 9-3 19... 1030 31... 1520 4.0 653 645 8.3 721 22.0 8.8 107 860 SEP 29... 1230 1.6 761 710 8.0 719 14.5 8.8 92

STREP­ HARD­ ALKA­ TOCOCCI NESS MAGNE­ SODIUM POTAS­ BICAR­ LINITY, ALKA­ PECAL, HARD­ NONCAR- CALCIUM SIUM, SODIUM, AD­ SIUM, BONATE CARBON­ LINITY KP AGAR NESS BONATE DIS­ DIS­ DIS­ SORP­ DIS­ IT-FLD ATE LAB (COLS. (MG/L (MG/L SOLVED SOLVED SOLVED TION SOLVED (MG/L IT-FLD (MG/L PER AS AS (MG/L (MG/L (MG/L RATIO (MG/L AS (MG/L - AS DATE 100 ML) CAC03) CAC03) AS CA) AS MG) AS NA) AS K) HC03) CAC03) CAC03) (31673) (00900) (95902) (00915) (00925) (00930) (0093D (00935) (99440) (99430) (90410) MAR OH.. 339 99 88 29 5.9 .1 6.7 306 251 240 17.. 168 138 31., R6000 158 48 42 13 2.9 .1 4.9 110 APR 01. , 02.. 02.. — — 15.. 312 100 82 26 6.0 .2 4.8 _ 210 MAY 25-. — 431 140 110 38 9.8 .2 4.2 — — 287 JUN 10., 23., JUL 07.. _ 358 100 89 33 7-1 .2 4.5 316 259 256 AUG 04. — 385 110 95 36 8.2 .2 5.2 — — 275 19.. 31. 640 347 110 86 32 6.7 .2 8.4 292 239 236 SEP 29. — 389 140 98 35 7.3 .2 6.5 — — 252 NOTE: Letter K indicates non-ideal colony count. Letter E indicates estimated value, ANALYSIS OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS

444410096251001 FLORIDA GREEK NEAR BURR, MN—Continued SOLIDS, SOLIDS, NITRO­ NITRO­ SEDI­ CHLO­ PLUO- SILICA, RESIDUE SUM OF GEN, GEN, AM­ MENT, SULFATE RIDE, RIDE, DIS­ AT 180 CONSTI­ N02+N03 MONIA + PHOS­ SEDI­ DIS­ DIS­ DIS­ DIS­ SOLVED DEG. C TUENTS, DIS­ ORGANIC PHORUS, MENT , CHARGE, SOLVED SOLVED SOLVED (MG/L DIS­ DIS­ SOLVED TOTAL TOTAL SUS­ SUS­ (MG/L (MO/L (MG/L AS SOLVED SOLVED (MG/L (MG/L (MG/L PENDED PENDED DATE AS S04) AS CL) AS F) SI02) (MG/L) (MO/L) AS N) AS N) AS P) (MG/L) (T/DAY) (00945) (00940) (00950) (00955) (70300) (70301) (0063D (00625) (00665) (80154) (80155) MAR 04... 120 3.2 .2 24 433 427 .62 .78 .120 — — 17... — — — — — — — — — 47 2.5 31... 70 2.8 .1 12 198 214 .66 1.80 .240 185 33 APR 01. . . — — — — — — — — — 288 37 02... — — — — __ — — — — 220 51 02. . . — — — — — — — — — 265 69 15... 130 4.0 .2 21 451 400 < .10 .42 .110 31 1.3 MAY 25... 180 4.0 .3 16 521 534 <.10 .40 .040 64 .47 JUN 10... — — — __ _ — — — — 51 .47 23... _- -- — — __ — — — — 63 .08 JUL 07... 140 2.5 .3 23 510 455 .32 2.80 .090 42 .48 AUG 04... 150 2.8 .3 25 561 487 .39 .50 .090 — — 19... — — — — — — — 1.50 .060 — -- 31... 120 4.1 .3 26 422 427 .31 .80 .110 27 .29 SEP 29... 160 3.9 .3 20 550 482 .16 .50 .060 74 .32

SED. SED. SED. SED. SED. SED. SUSP. SUSP. SUSP. SUSP. SUSP. SUSP. PALL PALL FALL PALL FALL FALL DIAM. DIAM. DIAM. DIAM. DIAM. DI AM . FINER % FINER % FINER % FINER % FINER % FINER THAN THAN THAN THAN THAN THAN DATE 002 MM .004 MM .016 MM .062 MM .250 MM .500 MM (70337) (70338) (70340) (70342) (70344) (70345)

MAR 31... 48 53 76 93 99 100

BED BED BED BED BED BED BED] BED BED MAT. MAT . MAT. MAT. MAT. MAT. MAT. MAT. MAT. SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE SIEVE DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM1. DIAM. DIAM. % FINER % FINER % FINER % FINER % FINER % FINER % FINER % FINER % FINER THAN THAN THAN THAN THAN THAN THAN THAN THAN DATE .062 MM .125 MM .250 MM .500 MM 1.00 MM 2.00 MM 4.00 MM 8.00 MM 16.0 MM (80164) (80165) (80166) (80167) (80168) (80169) (8017P) (8017D (80172) MAR 31... <1 <1 2 28 63 82 94 99 100 315 ANALYSIS OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS 444726096274201 WEST BRANCH LAC QUI PARLE RIVER NEAR GARY, SD WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPE­ BARO­ OXYGEN, COLI- SPE­ CIFIC METRIC DIS­ FORM, STREAM- CIFIC CON­ PH PRES­ SOLVED FECAL, PLOW , CON­ DUCT- PH LAB SURE OXYGEN , (PER­ 0.7 INSTAN­ DUCT­ ANCE (STAND- (STAND­ (MM TEMPER­ DIS­ CENT UM-MF TIME TANEOUS ANCE LAB ARD ARD OF ATURE SOLVED SATUR­ (COLS./ DATE (CPS) (UMHOS) (UMHOS) UNITS) UNITS) HG) (DEG C) (MG/L) ATION) 100 ML) (00061) (00095) (90095) (00400) (00403) (00025) (00010) (00300) (00301) (31625) MAR 04.. 1400 04... 1400 1.4 807 -- 8~0 — 725 2.0 12.7 97 — 17.. 1400 1.7 810 — — 730 5.0 12,2 100 — 26.., 1200 E2.0 828 — — 736 5.0 13.2 107 — 31.., 1630 4.3 — 475 8.0 727 10.0 — — APR 01. . 1515 3.3 793 — — E725 9.5 10.3 _ _ 02... 1750 32 335 — — 720 10.0 9-5 89 — 15.. 1420 3.8 755 720 8.2 E730 17.0 9.3 ~ MAY 25.., 1550 1.4 807 793 8.0 730 13.0 8.7 86 74 JUN 10.., 1205 1.6 ______23.., 1240 1.4 — — — — 18.5 — — -- JUL 07.., 1530 1.1 790 760 7.9 E730 21.0 8.4 _ K80000 22... 1120 1.4 — — — — — — — — AUG 05... 1335 • 99 864 783 8.2 E730 20.0 _ _ _ 19... 1300 — — — __ __ — — — — 31... 1625 .99 779 760 8.1 721 19.5 8.5 98 1400 SEP 29.., 1340 1.0 799 722 7.9 719 13.0 9.6 97 —

STREP­ HARD­ ALKA­ TOCOCCI NESS MAGNE­ SODIUM POTAS­ BICAR­ LINITY, ALKA­ FECAL, HARD­ NONCAR- CALCIUM SIUM, SODIUM, AD­ SIUM, BONATE CARBON­ LINITY KF AGAR NESS BONATE DIS­ DIS­ DIS­ SORP­ DIS­ IT-FLD ATE LAB (COLS. (MG/L (MG/L SOLVED SOLVED SOLVED TION SOLVED (MG/L IT-FLD (MG/L PER AS AS (MG/L (MG/L (MG/L RATIO (MG/L AS (MG/L - AS DATE 100 ML) CAC03) CAC03) AS CA) AS MG) AS NA) AS K) HC03) CAC03) CAC03) (31673) (00900) (95902) (00915) (00925) (00930) (0093D (00935) (99440) (99430) (90410) MAR 04... — — — — — — — — 380 312 — 04... — — — — — __ — — — — — 17... — — ______26... — — — ______31... — 234 74 59 21 4.8 .1 6.4 — — 160 APR 01... — — ______— __ 02... — — — — __ __ — — — — — 15... — 399 130 97 38 10 .2 5.3 — — 270 MAY 25... 400 431 180 110 38 9-1 .2 4.2 — — 250 JUN 10... — ______23... — — — — _ _ __ — — — — JUL 07... K6100 398 150 100 36 7.4 .2 4.1 352 289 250 22... — — — — — — — — — — — AUG 05... — 402 140 100 37 7.2 .2 4.6 — — 263 19... — — — — — — — — — — __ 31... 1200 431 170 110 38 7.2 .2 4.5 346 284 257 SEP 29... — 420 240 — — — .2 4.8 — — 189 NOTE: Letter K indicates non-ideal colony count. Letter E indicates estimated value. 316 ANALYSTS OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS 444726096274201 WEST BRANCH LAC QUI PARLE RIVER NEAR GARY, SD--Continued WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SOLIDS, SOLIDS, NITRO- NITRO­ SEDI­ CHLO­ PLUO- SILICA, RESIDUE SUM OP GEN, GEN,AM- MENT , SULFATfi RIDE, RIDE, DIS­ AT 180 CONSTI­ N02+N03 MONIA + PHOS­ SEDI­ DIS­ DIS­ DIS­ DIS­ SOLVED DEG. C TUENTS, DIS- ORGANIC PHORUS, MENT, CHARGE, SOLVED SOLVED SOLVED (MG/L DIS­ DIS- SOLVED TOTAL TOTAL SUS­ SUS­ (MG/L (MG/L (MG/L AS SOLVED SO LVED (MG/L (MG/L (MG/L PENDED PENDED DATE AS S04) AS CL) AS P) SI02) (MG/L) (MG/L) AS N) AS N) AS P) (MG/L) (T/DAY) (00945) (00940) (00950) (00955) (70300) (70301) (0063D (00625) (00665) (80154) (80155) MAR 04... — — — __ _ — <.10 <.010 102 __ 04... — — — — __ — — — — — 17... — ______62 .28 26... — — — — — — — — 91 — 31... 90 2.7 .2 20 325 300 .22 <.10 .240 — — APR 01. .. — — — — — — — — — — 02... — — — — — — — — 148 13 15... 150 3-3 .2 26 519 492 <.10 .41 .040 35 .36 MAY 25... 170 3.7 .3 25 548 510 <.10 .80 .010 17 .06 JUN 10... — — — — — — — — — — 23... — — — — — — — — 70 .26 JUL 07... 160 1.8 .3 26 532 509 <.io 1.90 .020 8 .02 22... — — — — — — — 38 .14 AUG 05... 170 2.1 .3 27 511 506 <.10 .30 .020 — — 19... — — — — — — 3.40 .020 — — 31... 160 2.0 .3 29 408 521 <.10 .40 .020 83 .22 SEP 29... 160 7.4 .3 25 480 464 <.10 .10 .010 21 .06 317 ANALYSIS OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS 414900096240002 WEBBER IMPOUNDMENT INLET NEAR GARY, SD WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 BARO­ METRIC STREAM- PRES­ PLOW , PH SURE INSTAN- (STAND- (MM TEMPER­ TIME TANEOUS ARD OP ATURE DATE (CPS) UNITS) HG) (DEG C) (00061) (00400) (00025) (00010) APR 01... 1415 E.18 7.9 E730 12.0

NOTE: E - ESTIMATED VALUE. 318 ANALYSIS OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS 4449000962140000 WEBBER IMPOUNDMENT NEAR GARY, SD WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPE­ BARO­ SPE­ CIFIC METRIC TRANS­ CIFIC CON­ PH PRES­ PAR­ SAM­ RESER­ CON­ DUCT­ PH LAB SURE TEMPER­ ENCY PLING VOIR DUCT­ ANCE ( STAND­ (STAND­ (MM ATURE, (SECCHI TIME DEPTH DEPTH ANCE LAB ARD ARD OF AIR DISK) DATE ( FEET ) (FEET) (UMHOS) (UMHOS) UNITS) UNITS) HG) (DEO C) (M) (00003) (72025) (00095) (90095) (00400) (00403) (00025) (00020) (00078) MAR 04... 1200 2.00 8 685 800 8.0 8.1 732 __ 04.., 1205 2.00 8 685 800 8.0 8.1 732 — 2.50 APR 20. ., 1400 9-30 0 569 — 8.7 — E730 — 1.01 MAY 26... 1430 9.00 9 574 — 7.9 — 743 18.0 2.87 JUL 08... 1350 9.00 9 450 _ 9-1 _ 733 _ _ 22.., 0950 8.50 9 433 — 9.5 — 738 — — AUG 05.., 1435 8.50 9 428 412 9.0 9.0 738 _ _ 19... 1140 8.50 9 440 — 9.7 — E730 34.5 — SEP 01... 1313 3.00 9 433 410 9.8 9-1 728 26.5 2.32 15... 1125 8.00 9 415 — 8.8 — 738 — 2.74 29.. 1420 6.00 8 463 464 7.7 8.2 725 1.92

ALKA­ SOLIDS, NITRO­ MAGNE­ BICAR­ LINITY, CHLO­ SILICA, RESIDUE NITRO­ GEN HARD­ CALCIUM SIUM, BONATE CARBON­ RIDE, DIS­ AT 180 GEN, N02+N03 NESS DIS­ DIS­ IT-FLD ATE DIS­ SOLVED DEG. C N02+N03 DI S— (MG/L SOLVED SOLVED (MG/L IT-FLD SOLVED (MG/L DIS­ TOTAL SOLVED AS (MG/L (MG/L AS (MG/L - (MG/L AS SOLVED (MG/L (MG/L DATE CAC03) AS CA) AS MG) HC03) CAC03) AS CL) SI02) (MG/L) AS N) AS N) (00900) (00915) (00925) (99440) (99430) (00940) (00955) (70300) (00630) (00631) MAR 04. 433 86 53 242 198 7.4 2.4 589 .29 04. 433 86 53 242 198 7.4 2.4 589 — .29 APR 20. .48 MAY 26. JUL 08. 22. AUG 05. 185 33 25 3.9 3.2 325 19. SEP 01. 188 34 25 — — 4.4 .7 297 — 15. 29. 199 37 26 — — 5.1 .6 332 —

NITRO­ NITRO­ NITRO­ PHOS­ CHLOR-A CHLOR-B NITRO­ GEN, GEN, AM­ GEN, AM­ PHOS­ PHORUS, PHYTO- PHYTO- GEN, AMMONIA MONIA + MONIA + PHOS­ PHORUS, ORTHO, PLANK- PLANK- AMMONIA DIS­ ORGANIC ORGANIC PHORUS, DIS­ DIS­ TON TON TOTAL SOLVED TOTAL DIS. TOTAL SOLVED SOLVED CHROMO CHROMO (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L FLUOROM FLUOROM DATE AS N) AS N) AS N) AS N) AS P) AS P) AS P) (UG/L) (UG/L) (00610) (00608) (00625) (00623) (00665) (00666) (0067D (70953) (70954) MAR 04... — .160 — 1.6 .060 .010 .030 — 04... .160 1.6 .060 .010 .030 _ APR 20.. .060 — 1.10 — .100 — — 19.8 <.100 MAY 26.., .090 — .80 — .040 — — 3.50 <.100 JUL 08.., .060 — 1.3 .060 .040 .030 22.., — .050 — — AUG 05... .070 .040 .90 .90 .090 .090 .080 39.0 <.100 19... .050 4.60 .120 SEP 01.., — .020 .70 .060 .040 .020 5.00 <.100 15... — .070 29.. .050 1.7 .070 .050 1.80 <.100 NOTE: E - ESTIMATED VALUE. 319 ANALYSIS OF SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS 444900096240000 WEBBER IMPOUNDMENT NEAR GARY, SD—Continued WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SOLIDS, NITRO­ NITRO­ NITRO­ PHOS­ ARSENIC BARIUM, BERYL­ CADMIUM CHRO­ VOLA­ GEN, GEN, NH4 GEN, NH 4 PHORUS, TOTAL RECOV. LIUM, RECOV. MIUM, TILE IN N02+N03 TOTAL + ORG. TOTAL IN BOT­ PM BOT­ RECOV. PM BOT­ RECOV. BOTTOM TOT. IN IN BOT. TOT IN IN BOT. TOM MA­ TOM MA­ PM BOT­ TOM MA­ PM BOT­ MA­ BOT MAT MAT. BOT MAT MAT. TERIAL TERIAL TOM MA­ TERIAL TOM MA­ TIME TERIAL (MG/KG (MG/KG (MG/KG (MG/KG (UG/G (UG/G TERIAL (UG/G TERIAL DATE (MG/KG) AS N) AS N) AS N) AS P) AS AS) AS BA) (UG/G) AS CD) (UG/G) (00496) (00633) (00611) (00626) (00668) (01003) (01008) (01013) (01028) (01029) JUL 08... 1350 96100 <2.0 66 30000 700 <1 140 <1 <1

COPPER, IRON, LEAD, MANGA­ MERCURY NICKEL, ZINC, CARBON, CARBON, CYANIDE RECOV. RECOV. RECOV. NESE, RECOV. RECOV. RECOV. ORGANIC INOR­ TOTAL PM BOT­ PM BOT­ FM BOT­ RECOV. PM BOT­ PM BOT­ PM BOT­ TOT. IN GANIC, IN BOT­ TOM MA­ TOM MA­ TOM MA­ PM BOT­ TOM MA­ TOM MA­ TOM MA­ BOTTOM TOT IN TOM MA­ TERIAL TERIAL TERIAL TOM MA­ TERIAL TERIAL TERIAL MAT. BOT MAT TERIAL (UG/G (UG/G (UG/G TERIAL (UG/G (UG/G (UG/G (G/KG (G/KG (UG/G DATE AS CU) AS FE) AS PB) (UG/G) AS HG) AS NI) AS ZN) AS C) AS C) AS CN) (01043) (01170) (01052) (01053) (71921) (01068) (01093) (00687) (00686) (00721) JUL 08... 21 8000 20 810 <.01 20 37 23 15 <1

OXYGEN, SPE­ . DIS­ CIFIC SOLVED SAM­ CON­ OXYGEN, (PER­ PLING DUCT­ TEMPER­ DIS­ CENT TIME DEPTH ANCE ATURE SOLVED SATUR­ DATE ( PEET ) (UMHOS) (DEG C) (MG/L) ATION) (00003) (00095) (00010) (00300) (00301) MAR 04.., 1200 2.00 685 2.0 15.4 116 04... 1205 2.00 685 2.0 15.4 116 04.. 1207 4.00 885 4.0 18.7 149 04.., 1209 6.00 904 4.0 17.8 142 04.., 1211 7-50 925 4.5 14.9 120 APR 20.., 1350 .50 566 8.5 12.2 _ 20.., 1353 3.50 568 8.5 12.1 — 20.., 1355 5.00 — — — — 20... 1358 6.50 569 8.5 11.9 — 20.. 1400 9.30 569 8.5 11.7 — MAY 26.., 1423 .50 570 16.5 8.0 84 26.., 1425 3.00 571 16.5 8.0 84 26.., 1428 6.00 571 16.5 8.0 84 26.., 1430 9.00 574 16.5 7.4 78 JUN 10. ., 1135 .50 500 17-0 9.4 100 10.., 1138 3.00 499 17.0 9.4 100 10.. 1140 6.00 499 16.0 9.3 97 10.., 1143 9.00 499 15.5 9.2 94 10.., 1145 11.0 498 15.5 9.1 93 23.., 1320 .50 460 21.0 9.5 — 23.., 1322 3.00 463 21.0 9.5 — 23... 1325 6.00 464 21.0 9.5 — 23.., 1327 7.50 464 21.0 9.5 — JUL 08.. 1330 .50 452 24.0 8.7 108 08.., 1335 3.00 452 24.0 8.7 108 08... 1340 6.00 454 23.5 8.6 106 08.., 1350 9.00 450 22.5 6.2 75 22.., 0943 .50 437 27.0 9.4 122 22.., 0945 3.00 438 27.0 9.4 122 22.. 0948 6.00 438 27.0 9.1 118 22... 0950 8.50 433 26.0 10.4 133 AUG 05.. 1428 .50 438 27.5 11.1 146 05... 1430 3.00 438 27.0 11.3 147 05.. 1433 6.00 437 25.5 10.5 133 05... 1435 8.50 428 24.5 5.3 66 19... 1133 .50 445 25.0 10.6 — 19... 1135 3.00 445 24.5 11.0 — 19... 1138 6.00 445 24.0 14.7 — 19... 1140 8.50 440 22.0 5.7 — 320 ANALYSIS OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS 444900096240000 WEBBER IMPOUNDMENT NEAR GARY, SD—Continued WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 OXYGEN , SPE­ DIS­ CIFIC SOLVED SAM­ CON­ OXYGEN, (PER­ PLING DUCT­ TEMPER­ DIS­ CENT TIME DEPTH ANCE ATURE SOLVED SATUR­ DATE (FEET) (UMHOS) (DEQ C) (MG/L) ATION) (00003) (00095) (00010) (00300) (00301) SEP 01. . 1310 .50 431 22.5 10.5 127 01.., 1313 3-00 433 22.5 10.7 130 01. . 1315 6.00 430 20.5 10.8 126 01.., 1318 8.00 430 20.5 10.2 119 15... 1118 .50 402 14.5 7.5 76 15-., 1120 3-00 406 14.5 7.5 76 15.. 1123 6.00 415 14.5 7.5 76 15.., 1125 8.00 415 14.0 7.1 71 29-., 1415 .50 460 17.0 7.4 81 29... 1418 3.00 461 17.0 7.4 81 29... 1420 6.00 463 16.5 6.9 74 29-., 1422 8.00 463 16.0 6.4 68

BSD BED BED BED BED BED BED BED MAT. MAT. MAT. MAT. MAT. MAT. MAT. MAT. PALL PALL FALL PALL PALL SIEVE SIEVE SIEVE DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. DIAM. % FINER % PINER % FINER % FINER % FINER % FINER % FINER % FINER THAN THAN THAN THAN THAN THAN THAN THAN DATE .004 MM .062 MM .125 MM .250 MM .500 MM 1.00 MM 2.00 MM 4.00 MM (80157) (80158) (80159) (80160) (80161) (80168) (80169) (80170) MAR 04... 39 66 69 77 95 100 JUL 08... 63 97 99 100 321 ANALYSIS OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS 444900096240000 WEBBER IMPOUNDMENT NEAR GARY, SD—Continued PHYTOPLANKTON ANALYSES, OCTOBER 1981 TO SEPTEMBER 1982

DAPS FEB 25,82 APR 20,82 MAY 26,82 JUL 8,82 SEP 1,82 SEP 29,82 TIME 1200 1400 1430 1350 1320 1420

TOTAL CELLS/ML 140 3900 160 1300 830 1200

DIVERSITY: DIVISION 0.9 1.0 1.5 1.9 .CLASS 0.9 1.0 1.5 1.9 1.4 . .ORDER 1.6 1.1 1.5 2.2 1.4 ...FAMILY 2.1 1.1 1.0 1.6 2.2 1.4 . ...GENUS 2.1 1.1 1.5 1.6 2.2 1.4 CELLS PER- CELLS PER- CELLS PER- CELLS PER- CELLS PER- CELLS PER- ORGANISM /ML CENT /ML CENT /ML CENT /ML CENT ,/ML CENT /ML CENT BACILLARIOPHYTA (DIATOMS) .3ACILLARIOPHYCEAE ..ACHNANTHALES ...ACHNANTHACEAE ....COCCONEIS 14 1 ..BACILLARIALES ...NITZSCHIACEAE ....NITZSCHIA 36 1 27 2 ..EUPODISCALES ...COSCINODISCACEAE ....CYCLOTELLA 43# 27 ....MELOSIRA 43# 27 ..NAVICULALES ...NAVICULACEAE ....NAVICULA 29 ..SURIRELLALES ...SURIRELLACEAE ....SURIRELLA 36 1 CHLOROPHYTA (GREEN ALGAE) .CHLOROPHYCEAE ..CHLOROCOCCALES ...CHLOROCOCCACEAE ....SCHROEDERIA 40 140 11 ...OOCYSTACEAE ....ANKISTRODESMUS 36 1 72 6 14 1 ....OOCYSTIS 20 ..VOLVOCALES ...CHLAMYDOMONADACEAE ....CHLAMYDOMONAS 20 72 2 72# 45 14 1 ..ZYGNEMATALES .. .ZYGNEMATACEAE ....SPIROGYRA 290# 34 CHRYSOPHYTA .CHRYSOPHYCEAE ..OCHROMONADALES ...OCHROMONADACEAE ....OCHROMONAS 14 10 290 7 780# 67 CRYPTOPHYTA (CRYPTOMONADS) .CRYPTOPHYCEAE ..CRYPTOMONADALES ...CRYPTOCHRYSIDACEAE ....CHROOMONAS 840# 67 43 5 ...CRYPTOMONADACEAE ....CRYPTOMONAS 3200# 82 27 2 CYANOPHYTA (BLUE-GREEN ALGAE) .CYANOPHYCEAE ..CHROOCOCCALES . ..CHROOCOCCACEAE . . . . ANACYSTIS 86 10 ..NOSTOCALES . . .NOSTOCACEAE . ...ANABAENA 220# 26 . .OSCILLATORIALES . . .OSCILLATORIACEAE .. . .OSCILLATORIA 270# 24 EUGLENOPHYTA (EUGLENOIDS) .EUGLENOPHYCEAE ..EUGLENALES . . .EUGLENACEAE ....TRACHELOMONAS 14 10 58 14 1 PYRRHOPHYTA (FIRE ALGAE) .DINOPHYCEAE ..DINOKONTAE . ..CERATIACEAE . . . .CERATIUM 120 9 190# 22 .. .GLENODINIACEAE ....GLENODINIUM 250

NOTE: # - DOMINANT ORGANISM; EQUAL TO OR GREATER THAN 15% * - OBSERVED ORGANISM, MAY NOT HAVE BEEN COUNTED; LESS THAN 1/2% 322 ANALYSIS OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS

451240092500001 BIG MARINE LAKE EAST BAY, NEAR FOREST LAKE, MN

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

HARD­ NESS MAGNE­ HARD­ NONCAR- CALCIUM SIUM, SODIUM, SAM- RESER- NESS BONATE DIS­ DIS­ DIS­ PLENG VOIR PH (MG/L (MG/L SOLVED SOLVED SOLVED TIME DEPTH DEPTH LAB AS AS (MG/L (MG/L (MG/L (FEET) (FEET) (UNITS) GAG03) CAG03) AS GA) AS MG) AS NA) NOV 12. .. 1300 3.28 31 7-9 6.0 22 2.7 12... 1310 27.9 31 8.0 6.0 22 2.8

SOLIDS, SODIUM POTAS­ ALKA­ CHLO­ SILICA, RESIDUE AD­ SIUM, LINITY SULFATE RIDE, DIS­ AT 180 SORP­ DIS­ LAB DIS­ DIS­ SOLVED DEG. C TION SOLVED (MG/L SOLVED SOLVED (MG/L DIS­ PERCENT RATIO (MG/L AS (MG/L (MG/L AS SOLVED DATE SODIUM AS K) CAC03) AS S04) A3 GL) SI02) (MG/L)

1.9 82 3.5 4.6 .5 104 1.9 83 3.2 4.7 .5 100

SPE­ CIFIC SAM­ CON­ OXYGEN, PLING DUCT- PH TEMPER- DIS- TIME DEPTH ANCE ATURE SOLVED DATE (FEET) (UMHOS) (UNITS) (DEG C) (MG/L) NOV 12... 1215 .0 156 8.2 5.5 12.5 12... 1216 3-3 157 5.5 11.6 12. .. 1217 6.6 158 5.5 11.4 12... 1218 9.8 158 5-5 11.0 12. .. 1220 13.1 158 5.5 10.9 12.. . 1221 16.4 158 5.5 10.7 12. .. 1222 19.7 157 8.0 5.5 10.7 12... 1223 23-0 157 8.1 5.5 10.7 12. .. 1225 29-5 157 8.0 5.5 10.7 12... 1226 31.2 157 8.0 5.5 9.8 323 ANALYSIS OP SAMPLES COLLECTED AT WATER-QUALITY PARTIAL-RECORD STATIONS

451240092500002 BIG MARINE LAKE SOUTH BAY, NEAR FOREST LAKE, MN

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

HARD­ NESS MAGNE­ HARD­ NONCAR- CALCIUM SIUM, SODIUM, SAM- RESER- NESS BONATE DIS­ DIS­ DIS­ PLING VOIR PH (MG/L (MG/L SOLVED SOLVED SOLVED TIME DEPTH DEPTH LAB AS AS (MG/L (MG/L (MG/L DATE (FEET) (FEET) (UNITS) CAC03) CAC03) AS CA) AS MG) AS NA) NOV 12... 1200 3.28 33 7.9 7.0 22 8.1 2.6 12... 1210 29.5 33 7.9 85 1.0 21 7.8 2.5

SOLIDS, SODIUM POTAS- ALKA- CHLO­ SILICA, RESIDUE AD­ SIUM, LINITY SULFATE RIDE, DIS- AT 180 SORP­ DIS­ LAB DIS­ DIS­ SOLVED DECS. C TION SOLVED (MG/L SOLVED SOLVED (MG/L DIS­ PERCENT RATIO (MG/L AS (MG/L (MQ/L AS SOLVED DATE SODIUM AS K) CAC03) AS SOU) AS CL) SI02) (MG/L) NOV 12... .1 l.i 81 5.1 1.2 101 12... .1 l.l 3.1 1.1 104

SPE­ CIFIC SAM­ CON­ OXYGEN, PLING DUCT­ PH TEMPER­ DIS­ TIME DEPTH ANCE ATURE SOLVED DATE (FEET) (UMHOS) (UNITS) (DEG C) (MG/L) NOV 12.. 1215 .0 155 7.9 6.0 10.5 12.. 1216 3.3 155 7.9 6.0 10.4 12.. 1217 9.8 155 7.9 6.0 10.6 12.. 1218 13.1 155 7.9 6.0 10.9 12.. 1220 16.4 155 7.9 6.0 11.0 12.. 1221 19.7 155 7.9 6.0 11.3 12.. 1222 23.0 155 7.9 6.0 11.5 12.. 1223 26.2 155 7.9 6.0 12.1 12.. 1225 29.5 156 7.9 6.0 12.3 12.. 1226 32.8 160 8.1 6.0 12.2

H-2/ 0-18/ H-l/ 0-16 STABLE STABLE ISOTOPE ISOTOPE RATIO RATIO TIME PER PER DATE MILL MIL AUG 25... 1105 -3.6 -2.5 25... 1110 -32.5 -2.4 25... 1115 -35.5 -2.3 324 ANALYSIS OP SAMPLES COLLECTED AT WATEH-QUALITY PARTIAL-RECORD STATIONS

451240092500004 032N20W29AAD USGS PPT COLLECTOR AT BIG MARINE

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

HARD­ NESS MAGNE­ HARD­ NON CAR­ CALCIUM SIUM, SODIUM, NESS BON ATE DI S— DIS­ DIS­ PH ( MG/L (MG/L SOLVED SOLVED SOLVED LAB AS AS (MG/L (MG/L (MG/L PERCENT DATE (UNITS) CAC03) CAC03) A3 CA) AS MG) AS NA) SODIUM OCT 13-13 5.9 1.0 1.0 .4 .3 0 21-21 5.9 .00 .2 .0 .2 26

NITRO­ SODIUM POTAS­ ALKA­ CHLO­ SILICA, GEN, AD­ SIUM, LINITY SULPATE RIDE, DIS­ AMMONIA SORP­ DIS­ LAB DIS­ DIS­ SOLVED DIS­ TION SOLVED (MG/L SOLVED SOLVED (MG/L SOLVED RATIO (MG/L AS (MG/L (MG/L AS (MG/L DATE AS K) CAC03) AS 304) AS CL) SI02) AS N) OCT 13-13 1.5 3.0 ^.9 .5 .2 .530 21-21 .5 1.5 .5 .1 .310

451240092500005 031N20W05CDD OUTLET OP BIG MARINE AT COUNTY ROAD 4

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

HARD­ SPE­ NESS MAGNE- CIFIC HARD­ NONCAR- CALCIUM SIUM, SAM- CON- NESS BONATE DIS- DIS- PLING DUCT- PH PH TEMPER- (MG/L (MG/L SOLVED SOLVED TIME DEPTH ANCE LAB ATURE AS AS (MG/L (MG/L DATE (PEET) (UMHOS) (UNITS) (UNITS) (DEG C) CAC03) CAC03) A3 CA) AS MG) NOV 12. .. 1400 .90 137 7.8 7.6 5.5 79 5.0 19 7.6

SOLIDS, SODIUM POTAS­ ALKA­ CHLO­ SILICA, RESIDUE SODIUM, AD­ SIUM, LINITY SULPATE RIDE, DIS- AT 180 DIS­ SORP­ DIS­ LAB DIS­ DIS­ SOLVED DEG. C SOLVED TION SOLVED (MG/L SOLVED SOLVED (MG/L DIS- (MG/L PERCENT RATIO (MG/L AS (MG/L (MG/L AS SOLVED DATE AS NA) SODIUM AS K) CAC03) AS S04) AS CL) SI02) (MG/L) NOV 12... .1 2.0 1.4 4.6 95 325 MISCELLANEOUS ANALYSES OP STREAMS IN MINNESOTA WATER QUALITY DATA AT STREAMPLOW STATIONS Field determinations of water temperature and specific conductance are made at many streamflow stations in addition to those that are also regular water-quality stations. These data are usually collected at regular intervals during routine visits to the station. Additional data for each station are published elsewhere in this report.

WATER QUALITY DATA AT STREAMPLOW STATIONS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPECIFIC SPECIFIC CONDUC- CONDUC­ MEASURED TEMPERA- TANCE MEASURED TEMPERA­ TANCE DISCHARGE TURE ( MICRO- DISCHARGE TURE (MICRO- DATE (ft3/ 8 ) (°C) MHOS) DATE (ft 3/s) MHOS)

05211000 MISSISSIPPI RIVER AT GRAND RAPIDS, MN OCT. MAY 08, 1981... 1710 11.5 260 12...... 1580 13.0 215 OCT. MAY 22. 2480 7.0 240 24. ., ...... 2680 18.0 200 NOV. JUNE 05. 2530 7.0 250 02...... 2690 16.5 250 JAN. JUNE 11, 1982. .. 1890 .0 315 08...... 2620 17.0 275 FEB. JUNE 18, 2000 5.0 390 14. , , ...... 2710 19.0 270 MAR. JUNE 05. 1830 4.0 325 24...... 2270 20.0 280 MAR. JUNE 19- 1690 4.5 325 30...... 1820 APR. JULY 09. 1630 4.0 310 16, ...... 1190 24.0 260 APR. AUG. 23. 1420 8.0 180 05...... 1290 APR. SEPT. 28, 3300 9.0 150 23...... 939 14.5 280 MAY 03. 3060 14.0 190

05212700 PRAIRIE RIVER NEAR TACONITE, MN OCT. APR. 07, 1981... 227 9.5 125 06. , ...... 198 NOV. APR. 06. 295 4.5 100 19...... 1580 3.0 75 JAN. MAY 07, 1982... 70 .0 155 04...... 835 12.0 95 FEB. JUNE 09. 75 .0 —— 01...... 567 17.0 100 FEB AUG. 26. 92 .0 180 03...... 212 20.0 120 MAR. SEPT. 16. 81 .5 190 16.. , ...... 84 14.5 147

05216860 SWAN RIVER NEAR CALUMET, MN OCT. APR. 08, 1981. .. 84 10.0 260 06. ,...... 77 1.0 310 NOV. APR. 06. 78 6.0 270 20...... 341 3.0 270 JAN. MAY. 07 1982. .. 39 .0 300 04...... 167 12.0 260 FEB. JUNE 19. 29 1.0 320 01...... 115 15.0 285 MAR. AUG. 11. 25 .0 334 03...... 94 22.0 280 APR. SEPT. 02. 32 1.5 300 16. , ...... 44 15.0 300

05227500 MISSISSIPPI RIVER AT AITKIN, MN OCT. APR. 05, 1981... 2190 9.5 255 23...... 6410 8.0 105 NOV. APR. 09. 3440 4.0 —— 27...... 5900 10.0 132 JAN. MAY 05, 1982... 2000 .0 07...... 5500 11.0 150 FEB. JUNE 16. I960 .0 285 02...... 4620 16.5 200 MAR. JULY 17. 1750 .0 285 27...... 2500 22.0 260 APR. SEPT. 16, 5060 .0 160 20...... 2110 14.5 244 APR. 18. 6030 3.5 160 326 MISCELLANEOUS ANALYSES OP STREAMS IN MINNESOTA WATER QUALITY DATA AT STREAMPLOW STATIONS, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 SPECIFIC SPECIFIC CONDUC- CONDUC­ tMEASURED TEMPER (V- TANCE MEASUR ED TEMPERA- TANCE I)ISCHARGE TURE (MICRO- DISCHA ROE TURE (MICRO- DATE (ftVs) (°C) MHOS) DATE (ftV s) (°C) MHOS)

05245100 LONG PRAIRIE RIVER AT LONG PRAIRIE, MN OCT. APR. 08, 1981... 84 10.0 490 06...... 897 2.0 290 NOV. APR. 18...... 67 27...... 340 DEC. MAY 21...... 34 1.0 600 20...... 588 17.0 430 FEB. JULY 09, 1982... 43 .0 480 27...... 146 27.0 430 MAR. 30...... 114 3.0 380

05247500 CROW WINQ RIVER NEAR PILLAGER, MN OCT. JUNE 14, 1981... 1990 11.0 375 09...... 1440 16.0 395 DEC. AUG. 03...... 983 3-0 400 03...... 925 25.0 355 FEB. SEPT. 12, 1982... 709 2.0 340 30...... 780 14.0 375 MAR. 18...... 791 2.0 410'

05267000 MISSISSIPPI RIVER NEAR ROYALTON, M N DEC. MAY 09, 1981... 3630 .5 300 20...... 25600 16.0 195 JAN. JULY 19, 1982... 3830 .0 330 15...... 590C 23.0 305 MAR. SEPT. 16...... 2980 2.0 325 08...... 1900 19.5 280

05275000 ELK RIVER NEAR BIQ LAKE, MN OCT. APR. 16, 1981... 222 9-5 30...... 349 12.5 300 DEC. JUNE 04...... 183 2.0 360 17...... 172 ——— JAN. JULY 20, 1982... 85 .0 410 26...... 144 22.0 310 MAR. SEPT. 17...... 134 2.5 420 09...... 112 18.5 310 MAR. 30...... 382 1.0 275

05278000 MIDDLE FORK CROW RIVER NEAR SPICER, MN OCT. APR. 08, 1981... 45 10.0 370 23...... 329 12.0 370 NOV. APR. 18...... 94 5.0 400 27...... 309 10.5 420 DEC. JUNE 21...... 86 2.0 440 21...... 94 20.0 400 FEB. AUQ. 09, 1982... 52 18...... 49 25.0 360 MAR. 26...... 94 2.0 400

05280000 CROW RIVER AT ROCKFORD, MN OCT. APR . 27, 1981... 1110 6.0 675 01...... 660C 3.5 540 NOV. APR. 25...... 652 3.0 690 29...... 370C 14.5 550 DEC. MAY 18...... 205 .0 970 26...... 318C 17.0 700 DEC. JUNE 29...... 297 .0 880 25...... 1130 21.0 660 JAN. JULY 29, 1982... 179 1.0 760 27...... 655 23.5 560 FEB. AUQ. 24 240 .0 720 25...... 213 22.5 600 MAR. SEPT. 25...... 2080 2.5 460 27...... 437 15.0 660 MAR. 29...... 6240 2.0 545 327 MISCELLANEOUS ANALYSES OP STREAMS IN MINNESOTA WATER QUALITY DATA AT STREAMPLOW STATIONS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPECIFIC SPECIFIC CONDUC- CONDUC­ ]MEASURED TEMPERA- TANCE MEASURED TEMPERA­ TANCE 1DISCHARGE TURE (MICRO- DISCHARGE TURE (MICRO- DATE (ftVs) (°C) MHOS) DATE (ft3/s) (°C) MHOS)

05286000 RUM RIVER NI5AR ST. FRANCIS, MN OCT. MAY 16, 1981... 590 12.5 310 06...... 886 14.0 270 DEC. JUNE 04...... 363 3.0 320 17...... 417 FEB. JUNE 02, 1982... 190 2.0 320 22...... 440 20.5 275 MAR. JULY 19...... 297 26...... 440 24.0 290 MAR. AUG. 30...... 604 2.5 310 27 pfi4 19.5 290

05287890 ELM CREEK NEAR CHAMPLIN, MN OCT. APR. 05, 1981... 3.4 12.0 —— 26 ...... 88 12.0 480 NOV. APR. 13...... 5.2 4.5 680 27...... 76 12.0 460 DEC. MAY 29...... 2.6 .0 780 07...... 69 11.0 480 JAN. JUNE 13, 1982... 2.3 .0 740 04...... 30 10.0 550 FEB. JULY 09...... 1.3 2.0 700 19...... 4.6 18.0 600 MAR. SEPT. 29...... 73 3.5 380 10...... 6.7 16.0 510

05288500 MISSISSIPPI 1RIVER NEAR ANOKA, MN OCT. MAY 02, 1981... 3630 12.0 415 17...... 22200 18.0 370 NOV. JUNE 17...... 8230 5.5 430 23...... 8350 22.0 350 MAR. AUG. 01, 1982... 4800 375 02...... 6360 26.0 355 APR. SEPT. 12...... 32700 3.0 300 24...... 5860 16.0 345

05288840 BASSETT CREEK IN GOLDEN VALLEY, MN OCT. JUNE 19, 1981... 10 7.0 670 03...... 17 14.5 575 DEC. JULY 04...... 6.8 .0 1080 20 ...... 6.9 25.0 650 MAR. SEPT. 30, 1982... 99 3.0 400 10...... 143 19.5 190 APR. 19...... 40 6.0 05291000 WHETSTONE RIVER NEAR BIG STONE CITY, SOUTH DAKOTA NOV. APR. 12, 1981... 3.0 5.5 1225 05...... 229 1.5 600 DEC. APR. 23...... 3.1 .0 1700 13...... 109 11.0 1000 FEB. APR. 12, 1982... .90 .0 1020 22...... 46 13.0 1000 MAR. JUNE 10...... 10 2.0 1150 17...... 7.6 22.0 1220 MAR. AUG. 19...... 88 2.0 540 1 1 ... ?.l 21.0 1100 MAR. 31...... 3130 3.0 270 05292000 MINNESOTA EI\fER AT ORTONVILLE, MN DEC. APR. 03, 1981... 1.5 23...... ,--- ?63 DEC. JUNE 23...... 2.9 10...... S4 18.0 1150 FEB. JULY 12, 1982... 2.9 .5 875 02...... 3-5 23-0 1425 MAR. AUG. 31...... 359 4.0 290 11...... 2.7 20.0 1200 APR. SEPT. 05...... 278 1.5 630 16...... 2.8 13.5 1550 APR. 12...... 240 7.0 975 328 MISCELLANEOUS ANALYSES OP STREAMS IN MINNESOTA WATER QUALITY DATA AT STREAMFLOW STATIONS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPECIFIC SPECIFIC CONDUC- CONDUC­ JMEASURED TEMPERA- TANCE MEASURED TEMPERA­ TANCE IDISCHARGE TURE (MICRO- DISCHARGE TURE (MICRO- DATE (ft 3/s) (°C) MHOS) DATE (ftVs) MHOS)

05293000 YELLOW BANK RIVER NEAR ODESSA, MN

NOV. MAR. 12, 1981... 1.4 8.5 990 31...... 1660 2.0 305 DEC. APR. 03...... 2.7 —— —— 12...... 80 7.0 DEC. APR. 23...... 1.4 .0 1200 22...... 43 10.0 900 FEB. JUNE 12, 1982... 1.1 .0 —— 10...... 17 16.5 1000 MAR. AUG. 10...... 3-9 2.0 1000 11...... 6JI 18.0 950 MAR. 22...... 38 .0 —

05294000 POMME DE TERRE RIVER AT APPLETON, MN

OCT. APR. 05, 1981... 21 11.0 1400 26 ...... 322 11.5 625 NOV. MAY 12...... 26 —— 1200 14...... 197 17.0 830 DEC. JUNE 23...... 18 1.0 1100 24...... 87 21.5 825 JAN. JULY 13, 1982... 6.9 .0 1050 20 ...... 11 27.0 780 FEB. AUG. 12...... 1.7 .0 1025 11...... 44 21.5 800 MAR. SEPT. 22...... 140 .0 645 16...... 53 13.0 960 APR. 01...... 1340 .5 315

05300000 LAC QUI PARLE RIVER NEAR LAC QUI PARLE, MN

NOV. APR. 13, 1981... 2.8 5.5 1100 12...... 243 8.0 925 DEC. MAY 23...... 2.9 .0 2000 14...... 51 17.5 1450 FEB...... JULY 08, 1982... 2.0 .0 1500 12...... 92 MAR. AUG. 22...... 137 .0 —— 06...... 8.0 27.0 1350 APR. SEPT. 01...... 888 4.0 540 16...... 2.5 15.0 1800

05301000 MINNESOTA RIVER NEAR LAC QUI PARLE, MN

NOV. APR. 13, 1981... 129 8.0 740 05...... 3230 2.5 570 DEC. MAY 29...... 122 1.0 720 05...... 676 15.0 675 FEB. JULY 08, 1982... 68 .5 990 06...... 149 25.0 710 FEB. SEPT. 19...... 301 —— 1000 09...... 23 22.0 830 FEB. SEPT. 25...... 306 1.5 950 20 ...... 16 MAR. 10...... 144 2.0 1050

05301500 CHIPPEWA RIVER NEAR MILAN, MN OCT. APR. 06, 1981... 125 10.5 700 02...... 2840 3.5 420 NOV. MAY 19...... 167 2.0 825 04...... 981 19.0 570 DEC. JULY 22...... 87 .0 990 01...... 258 22.0 760 JAN. AUG. 26, 1982... 21 .0 —— 12...... 110 21.5 700 FEB SEPT. 25...... 38 .0 825 16...... 237 13-5 680 MAR. 29...... 583 1.0 540 329 MISCELLANEOUS ANALYSES OP STREAMS IN MINNESOTA WATER QUALITY DATA AT STREAMPLOW STATIONS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPECIFIC SPECIFIC CONDUC- CONDUC­ M EASURED TEMPERA- TANCE MEASURED TEMPERA­ TANCE D ISCHARGE TORE (MICRO- DISCHARGE TURE (MICRO- DATE (ftVs) (°C) MHOS) DATE (ftVs) (°C) MHOS)

05311000 MINNESOTA filVER AT MONTEVIDEO, MN OCT. APR. 05, 1981... 62 14.0 725 05. ....----- ^fi^n 2.0 580 NOV. MAY 25...... 136 2.0 840 21...... 1710 16.0 680 DEC. JULY 30...... 150 .0 720 06...... 173 25.0 860 JAN. SEPT. 19, 1982... 87 .0 925 09 ...... 34 20.5 860 FEB. SEPT. 22...... 350 .0 940 20...... 36 12.5 1000 MAR. 26...... 575 4.0 950

05313500 YELLOW MEDICINE RIVER NEAR GRANITE FALLS, MN OCT. APR 26, 1981... 3 1 5.0 1125 13...... 290 1170 DEC. JUNE 21...... 5.2 .5 1425 08...... 61 18.5 1600 FEB. AUG. 09, 1982... 4.1 .0 1180 09...... 21 21.5 1070 MAR. SEPT. 15...... 14 3.0 540 17 ..... Q.3 14.0 1250 MAR. 29...... 251 2.5 900 05315000 REDWOOD RIVER NEAR MARSHALL, MN OCT. MAR. 26, 1981... 6.7 6.5 1400 30. ....----- ??Q 5.0 600 DEC. MAY 08...... 7.3 6.5 950 12...... 29 14.0 1200 DEC. JUNE 21...... 5.8 07...... 56 18.5 1000 FEB. JULY 11, 1982... 3-9 .0 1000 19...... 86 24.0 950 MAR. SEPT. 15...... 95 1.0 675 17 ..... m 15.0 1200 MAR. 19...... 73 1.0 750 05316500 REDWOOD RIVE;R NEAR REDWOOD FALLS, MN NOV. JUNE 25, 1981... 57 2.5 1600 04...... 1Q? 19.5 1700 DEC. JULY 21...... 34 .5 16...... 1540 25.0 540 FEB. JULY 09, 1982... 5.8 .0 1300 30...... 148 23.5 1300 MAR. SEPT. 29...... 642 2.0 850 17...... 118 15.0 1500 APR. 07...... 468 2.5 1075 05317000 COTTONWOOD RIVER NEAR NEW ULM, MN OCT. MAY 14, 1981... 103 11.5 680 03...... 321 17.0 1200 DEC. JULY 03...... 52 .5 1250 01...... 207 20.0 1280 Jan. AUG. 14, 1982... 26 .0 1350 26 ...... 72 20.0 910 Mar. SEPT. 09...... 259 .5 750 22 ..... -\z,k 12.0 MAR. 26...... 1440 1.0 —— 05317200 LITTLE COTTONWC)OD RIVER NEAR COURTLAND, MN OCT. MAY 14, 1981... 28.1 12.0 865 03...... ^? 19.0 880 DEC. JUNE 03...... 31.1 1.0 1100 30...... 28 24.0 880 JAN. JULY 14, 1982... 6.9 .0 1160 08...... 21 MAR. AUG. 11...... 22 .5 740 26...... 4.2 17.0 930 MAR. SEPT. 26...... 246 1.0 —— 21...... 12 15.0 900 330 MISCELLANEOUS ANALYSES OP STREAMS IN MINNESOTA WATER QUALITY DATA AT STREAMFLOW STATIONS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPECIFIC SPECIFIC CONDUC- CONDUC­ MEASURED TEMPERA- TANCE MEASURED TEMPERA­ TANCE DISCHARGE TORE ( MICRO- DISCHARG TURE (MICRO- DATE (fWs) (°C) MHOS ) DATE (fWs) MHOS)

05319500 WATONWAN RIVER NEAR GARDEN CITY, MN

OCT MAR. 13 ', 1981... 107 14.0 910 19...... 1320 1.0 DEC . MAY 02 112 .5 1000 05...... 274 21.0 895 JAN . JULY 14 , 1982... 30 .0 440 01...... 143 22.0 960 MAR . AUG. 09 177 .0 800 25...... 44 23.0 700

05320000 BLUE EARTH RIVER NEAR RAPIDAN, MN

OCT MAR. 14 , 1981... 575 12.5 860 25...... 4740 1.0 DEC . MAY 02 444 .5 950 04...... 1020 18.0 850 JAN ^ JULY 13 , 1982... 150 .0 1080 01...... 1070 23.0 840 MAR . AUG. 10 1020 .0 780 26 , , , , , ..... 294 22.0 650

05320500 LE SUEUR RIVER NEAR RAPIDAN, MN OCT MAR. 05 ', 1981... 274 11.0 810 18, , , , ..... 2900 DEC . MAY 02 309 .5 860 04...... 551 21.0 780 JAN ^ JULY 13 , 1982... 57 .0 1050 02...... 376 21.0 810 MAR . AUG. 10 301 .5 750 27...... 100 18.0 625

05325000 MINNESOTA RIVER AT MANKATO , MN OCT MAR. 15 , 1981... 1540 13.5 840 19...... 10400 OCT . APR. 16 1510 11.0 —— 20 ...... 14100 8.5 795 DEC . JULY 01 1480 .5 995 02...... 2680 23.0 900 JAN . AUG. 12 , 1982... 612 .0 1090 27...... 833 22.0 780 MAR . 11 2340 .0 820

05327000 HIGH ISLAND CREEK NEAR HENDERSON, MN OCT APR. 16 \ 1981... 96 11.5 790 30...... 329 13.0 720 DEC B JUNE 04 79 .5 995 30...... 30 21.0 810 JAN . AUG. 15 , 1982... 10 .0 1030 23...... 2.3 21.5 905 MAR f SEPT. 08 15 .0 1120 20 ...... 36 14.0 735 MAR , 31 1010 4.0 520

05330000 MINNESOTA RIVER NEAR JORDAN, MN OCT MAR. 28 , 1981... 2850 6.0 1020 23...... 16100 .5 525 NOV . APR. 24 1940 2.0 950 19...... 14400 DEC . MAY 23 1380 .0 1160 24 ...... 11000 15.0 900 JAN . JULY 25 , 1982... 613 .0 1060 07...... 2570 26.0 880 FEE . AUG. 26 815 3.0 1010 26 . .... 852 22.0 740 MAR ^ Sept. 08 2240 .5 825 16...... 1750 16.0 790 MAR . 18 8080 .0 505 331 MISCELLANEOUS ANALYSES OF STREAMS IN MINNESOTA WATER QUALITY DATA AT STREAMFLOW STATIONS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPECIFIC SPECIFIC CONDUC- CONDUC­ MEASURED TEMPERA- TANCE MEASURED TEMPERA­ TANCE DISCHARGE TURE (MICRO- DISCHARGE TURE (MICRO- DATE (ft-Vs) (°C) MHOS) DATE (ft 3 /s) (°C) MHOS)

05331000 MISSISSI1PPI RIVER AT ST. PAUL, MN OCT. JULY 21, 1981... 17200 10.0 440 15...... 16100 APR. AUG. 13, 1982... 46100 10...... 6740 MAY AUG. 18.,------33700 18.0 365 12...... 6210 JULY SEPT 13.. 14900 30 ...... c;C)6n 17.0 375

05336700 KETTLE R:IVER BELOW SANDSTONE, MN NOV. APR. 18, 1981... 366 5.0 110 29...... 14QO 10.0 80 JAN. JUNE 06, 1982. .. 170 .0 95 07...... 310 17.0 145 MAR. JULY 02., 164 1.0 220 28 ...... 31 1 24.0 130

05337400 KNIF1S RIVER NEAR MORA, MN OCT. APR. 06, 1981. .. 99 9.5 160 20. ------^nq 5.0 118 NOV. MAY 19 31 3.0 145 ...... 84 18.0 120 JAN. JULY 07, 1982... 12 .0 260 27...... 20 26.0 155 FEB. AUG. 16. 12 .0 270 29 ...... 11 19.0 APR. 01 158 2.0 190 05340050 SUNRISE RIVER NEAR LINDSTROM, MN OCT. MAR. 07, 1981. .. 20 11.5 345 25. ------i n^ 3-0 350 OCT. APR. 19 43 7.0 350 01...... 261 2.0 245 OCT. APR. 29.. 42 6.0 315 21...... 295 7.0 190 NOV. MAY 17., 80 5.0 310 24...... 244 19.0 275 JAN. JULY 05, 1982... 48 .0 260 27...... 44 23.0 295 FEB. SEPT 16., 42 .0 545 03. '...... 42 19.0 265 05344500 MISSISSIPPI RIVER AT PRESCOTT, WISCONSIN OCT. APR. 27, 1981. .. 25100 9.0 310 14, 1982.... 58400 6.0 485 05345000 VERMILLIION RIVER NEAR EMPIRE, MN OCT. MAR. 15, 1981... 34 12.5 750 31...... 288 3.0 420 NOV. APR. 09.. 29 5.5 745 15...... 79 10.0 DEC. MAY 21. , 22 .0 790 04. r- «5 14.0 750 FEB. MAY 01, 1982... 23 .0 975 05...... 64 13.0 700 FEB. JUNE 1R. 26 5.0 850 r\Q ...... 50 12.0 MAR. JULY 23., 145 2.5 480 19...... 25 19.5 810 MAR. SEPT ?6, 372 2.5 380 02 7fi 18.0 420 05353800 STRAIGHT RIVER NEAR FARIBAULT, MN NOV. MAY. 05, 1981... 191 11.5 910 10...... S7? 18.0 DEC. JULY 1R., 111 .0 810 16...... 260 21.0 650 FEB. AUG. 02, 1982... 40 .0 650 23...... 59 23.5 530 MAR. 22., 1150 1.0 5^0 332 MISCELLANEOUS ANALYSES OP STREAMS IN MINNESOTA WATER QUALITY DATA AT STREAMPLOW STATIONS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 SPECIFIC SPECIFIC CONDUC- CONDUC­ p 1EASURED TEMPERA- TANCE MI 5ASURED TEMPERA- TANCE IHSCHARGE TURE (MICRO- D] iSCHARGE TURE (MICRO- DATE (ft 3/s) (°C) MHOS) DATE ( MHOS)

05372995 SOUTH PORK ZUMBRO RIVER AT ROCHESTER, MN NOV. MAY 06, 1981... 110 14.5 710 11...... 346 21.0 610 DEC. JULY 16...... 66 5.5 710 07...... 165 25.0 340 FEB. AUG. 02, 1982... 47 6.5 610 25 ...... 107 22.0 490 MAR. 17...... 1170

05374900 ZUMBRO RIVER AT KELLOGG, JIN OCT. MAR. 09, 1981... 598 11.0 640 19...... 2820 —— NOV. MAY 20...... 515 3.0 610 11...... 1320 18.5 580 JAN. JUNE 06, 1982... 317 .0 340 30...... 668 19-5 570 FEB. AUG. 22...... 445 .0 590 30...... 451 19-0 475

05376000 NORTH PORK WHITEWATER RIVER NEAR ELBA, MN OCT. MAY 06, 1981... 30 11.0 615 26 ...... 66 13.0 600 NOV. JUNE 18...... 26 6.0 575 30...... 44 14.5 580 JAN. JULY 05, 1982... 25 .0 550 28...... 36 18.0 550 FEB. AUG. 03...... 25 .5 530 19...... 30 18.0 560 MAR. SEPT. 25...... 119 4.0 365 14...... 40 14.0 510 APR. 14...... 44 10.0 590

05376800 WHITEWATER RIVER NEAR BEAVER , MN OCT. MAR. 09, 1981... 122 9.0 590 26 ...... 292 NOV. MAY 20...... 114 1.5 570 14...... 279 14.5 525 JAN. JULY 06, 1982... 92 .0 —— 08...... 138 , 19.0 540 PEB AUG. 24...... 94 4.0 515 30...... 124 , 18.0 500

05378220 GARVIN BROOK AT STOCKTON, MN PEB. JUNE 25, 1982... 9.8 5.0 495 03...... 12 16.0 480 MAR. JULY 16...... 15 5.0 435 10...... 11 12.5 450 MAY AUG. 12...... 13 31...... 9.8

05378230 STO(3KTON VALLEY CREEK AT STOCK!TON, MN FEB. JUNE 25, 1982... 8.8 3.0 480 03...... 11 16.0 500 MAR. JULY 12...... 10 4.0 440 01...... 10 14.0 480 Mar. AUG. 16...... 20 4.5 430 31...... 8.9 17-0 MAY 14...... 11 13.0 505

05378235 GAR.VIN BROOK NEAR MINNESOTA CITY, MN MAR. JUNE 12, 1982... 28 4.0 460 30...... 28 20 . 0 MAR. AUG. 16...... 56 4.0 410 31...... 26 23 . 5 475 MAY 14...... 35 14.5 ^40 333 MISCELLANEOUS ANALYSES OP STREAMS IN MINNESOTA

WATER QUALITY DATA AT STREAMFLOW STATIONS, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

SPECIFI Q SPECIFIC CONDUC CONDUC- MEASURED TEMPERA- TANCE D'M:EASURED TEMPERA- TANCE DISCHARGE TURE (MICRO ISCHARGE TURE (MICRO- DATE (ft 3 /s) (°C) MHOS) DATE (ft3/s) (°C) MHOS)

05378300 STRAIG HT VALLEY CREEK HEAR ROLLINl3STONE, MN OCT. MAR 08, 1981... 1.7 11.5 615 26 ...... 2.2 5.5 565 NOV. MAY 18...... l -Q 7.0 565 11...... 2.2 14.0 555 JAN. JUNE 06, 1982... 1.4 .0 485 30 ...:...... 1.4 17.0 550 FEB. AUG. 24...... 1.6 4.5 540 30...... 1.7 17.0 560

05378500 MISSISSIPPI RIVER AT WINONA , MN APR. JULY 08, 1982... 101000 29 ...... 24000 26.0 APR. AUG. 27...... 106000 11.5 315 31...... 14600 21.5 350 JUNE 08...... 52100 19.0 420

05384000 ROOT RIVER NEAR LANES30RO, MN OCT. MAR. 08, 1981... 243 11.0 625 23 ...... 1260 3.0 490 NOV. MAY 19...... 202 3.5 580 13...... 2460 15.0 475 JAN. JULY 08, 1982... 146 .5 02...... 306 20.5 480 FEB. SEPT. 0? ...... 178 ,5 515 02...... •515 19-5 420

05385000 ROOT RIVER NEAR HOUSTON, MN OCT. MAR. 07, 1981... 605 12.0 560 24...... 2690 NOV. MAY 19.,...... 530 3-5 575 12...... 1460 16.0 565 JAN. JULY 07, 1982... 384 .0 —— 02...... 714 19-0 510 FEB. SEPT. 00 ...... 542 .0 495 01...... 796

05385500 SOU1!fH FORK ROOT RIVER NEAR HOUJ5TON, MN OCT. MAR. 07, 1981... 156 13.5 580 24...... 535 NOV. MAY 19 ...... 150 5.0 550 12, ...... 233 14.0 525 JAN. JULY 07, 1982... 102 .0 —— 01...... 174 20.0 510 FEB. SEPT. 23.,...... 140 4.5 505 01...... 192 18.0 475

05457000 CEDAR RIVER NEAR AUSTIN, MN NOV. MAY 05, 1981... 159 12.0 760 11...... 473 11.0 735 DEC. JULY 17...... 96 1.0 780 16...... 382 22.5 530 FEB. AUG. 02, 1982... 63 .0 660 24 ...... 130 21.5 465 MAR. 23...... 1300 1.5 490

05476000 DES MOINES RIVER AT JACKSON , MN NOV. APR. 17, 1981... 16 10.0 900 29...... 368 12.0 1020 JAN. JUNE 27, 1982... 7.6 .0 1800 14...... 663 19.5 1100 FEB. AUG. PS...... 112 1.0 740 10...... 157 21.0 900 MAR. SEPT. 22...... 770 3.0 590 22...... 116 15.5 1000 APR. 07...... 776 1.0 710 334 335

8ROUND-WATER RECORDS 97°

49°—,_,_.

-48°

90°

Moorh

46°- Volume 1 Volume 2

EXPLANATION

Observation well, number 2« denotes well cluster

Major drainage basin divide

Base from U. S. Geological Survey 10 20 30 40 50 MILES Minnesota state base map, 1:1,000.000 0 10 20 30 40 50 60 KILOMETERS

Figure 9."Location of ground-water wells DEPTH TO WATER. IN FEET BELOW LAND SURFACE M TI o as 3= M TI pa O £ 3= tr1 -!=• X Si 3=> Si-O XSISI 3= Sl-O O0\ i-3 Pa i-3 f G i-3»3 1-3 fG oro M pa 1-1 P) GUI r1 M o > f-1 M pa 1-13> P) G --^ tr1 M co > -& osiocrsro 3 •-» 1-3 OO osiopacrsjr- >TJ cti-3-e- * s o o . o si MU1 *3OWO. . OKI P) M—J fl> SI < I >-!> BC » O ;> O O fl>Ki w< i oiPaoctoo 01 CO O fl> I ct 3= • SH- cnooO.fDi 3>«s;n) z 1^ ct IT) > pa I 3 ct ct >ij I > 3 X I 3 -oo » -33 M M^> I fl> !*r i_. >-• tr1 s; r1 * OZ03Z P) ct- O CO T O i ui f-1 I—' Kl S=" tr'oo 0 0 00 P3 SI P) 3 H- H 3" •• T tr'-cr . . 1 C 0 P3 M cn ct 0 * 01 a T M M G ct I—1 -trui r1 pa ;=• ui-^i f» 3= ro w Pa T 1-3 » O C CD fl> CO O • • -!=• • W) M • M T CD 1-5 aS CO ON SI >-» o pa Ct O 1 CD >-» 0 3 M 0 ct O O 1 < P) i-i> CD o cr J=-Oro tr1 0 U1CO 3 P) >« CH tr1 •-^ O CD o a co c o H3= O O O O f-J CD i—' . T CD - o 03 Z 3= pa . IT) ct P) f-1 1 H- O -trp) a 3 1-3 < VO O 00 a 3 o i n> M --JH1 t-" S) m uipacrcP'a ffiao -~3 co pa T » 3 -J CTl " si CD cr ct i ct pi 01 0«< C 01 • H- TI 3 3 O T C_u C 01 O 3 en H- C 3 O 3 C M M ct M 3 x-xQ CD 3 c a P) o H 3 • T M fi) P) M » f-1 0 . T t-> 3 P) 0 cr >-!> CD H- H- 3 CD Z cr o'-o ct i-»oo P a i-1 3 CD pj a cn 3 OT T IT'S: CD . -J P) C Oq T o ct (i) O O pa 3= M 1 00 ct o '-DCS o GO S fl> ct CD '-D C vo COT -l=--l=- o ro a> r1 pa H- O <-^> a^-^n) HCJ a> c - ro tr1 3 CD C CD C O P) H- • -ro 00-J 3 3 en -too 3 cn T O a en T N a ct T vo « > 1 ct T H. ct a. ct -trs; i CD = ro TI 0 « CO T rt S) i-Dct O. f-J . H- 3 H- O 1-1, CD << -j z P) CD << C - 0 < CD 3 0 o 0 T CD T ro CD O CD P) H- c^3 3 3= CO 1-" CO Ul--- OT pa • G M T 3 • O CD J** pa a CD • OT tr1 S *J P) < 1-4 cr • CO o Kl 3= 3= ct CD * ct 01 rt CM H- CD <*• -C=- • ct 00 < pa 0 CD CO P> j*' O C-,. T CTi ct 3> i~d P) Ul h* cn 30 -0 CD CH G-^ •

t^s: P33> <^ pa Si GROUND-WATER LEVELS 339

ANOKA COUNTY

451056093072201. Local number, 031N22W18AAA01. LOCATION.—Lat 45°10'56", long 93°07'22", in NE4NEJNE4 sec.l8, T.31 N., R.22 W., Hydrologic Unit 07010206, at 4th Avenue and Lilac Street, Lino Lakes. Owner: U.S. Geological Survey. AQUIFER.--Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 6 in (0.15 m), depth 270 ft (82.3 m), screened 260 to 270 ft (79-2 to 82.3 m). DATUM.—Land-surface datum is 895.8 ft (273.0 m) National Geodetic Vertical Datura of 1929. Measuring point: Top of well cap, 0.80 ft (0.24 m) above land-surface datura. REMARKS.—Water level affected by pumping. PERIOD OP RECORD.--February 1971 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 6.39 ft (1.95 m) below land-surface datum, July 7, 1975; lowest, 14.75 ft (4.50 m) below land-surface datum, Aug. 24, 1976.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 10.96 JAN 13 11.17 MAR 3 11.42 MAY 10 10.40 SEP 8 13-37

451056093072205. Local number, 031N22W18AAA05. LOCATION.—Lat 45°10'56", long 93°07'22", in NE^NEJNE* sec.18, T.31 N., R.18 W., Hydrologic Unit 07010206, at 4th Avenue and Lilac Street, Lino Lakes. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 13 ft (3-96 m), screened 11 to 13 ft (3.35 to 3.96 m). DATUM.—Land-surface datum is 895.6 ft (273.0 m) National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 1.90 ft (0.60 m) above land-surface datum. PERIOD OF RECORD.—February 1971 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 2.67 ft (0.81 m) below land-surface datum, July 7, 1975; lowest, 6,03 ft (1.84 m) below land-surface datum, Feb. 14, 1977.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 5.64 JAN 13 5.74 MAR 3 6.00 MAY 10 5.48 SEP 8 5-92

450927093033801. Local number, 031N22W23CBC01. LOCATION.—Lat 45°09'27", long 93°03'38", in SWJNWJSW* sec.23, T.31 N., R.22 W., Hydrologic Unit 07010206, at City of Centerville. Owner: U.S. Geological Survey. AQUIFER.--Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 4 in (0.10 m), depth 95 ft (29.0 m), screened 91 to 95 ft (27.7 to 29.0 m). DATUM.—Land-surface datum is 901.6 ft (274.8 m) National Geodetic Vertical Datum of 1929- Measuring point: Top of well cap, 3.00 ft (0.91 m) above land-surface datum. PERIOD OP RECORD.—February 1971 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 6.95 ft (2.12 m) below land-surface datum, Aug. 20, 1975; lowest, 9-78 ft (2.98 m) below land-surface datum, Feb. 14, 1977.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 7.90 JAN 13 8.28 MAR 3 8.53 MAY 10 8.50 SEP 8 340 GROUND-WATER LEVELS

ANOKA COUNTY—Continued

9 —

1 4 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

031N22W23CBC01

450927093033802. Local number, 031N22W23CBCO2. LOCATION.—Lat 45°09'27", long 93°03'33", in SW4NW4SW4 sec.23, T.31 N., R.22 W., Hydrologic Unit 07010206, at City of Centerville. Owner: U.S. Geological Survey. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 4 in (0.10 m), depth 277 ft (84.4 m), screened 272 to 277 ft (82.9 to 84.4 m). DATUM.—Land-surface datum is 901.6 ft (274.8 m) National Geodetic Vertical Datura of 1929. Measuring point: Top of recorder platform, 2.20 ft (0.67 m) above land-surface datum. REMARKS.—Water level affected by nearby flowing wells. PERIOD OP RECORD.—February 1971 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 8.10 ft (2.47 m) below land-surface datum, July 5, 1975; lowest, 16.20 ft (4.94 m) below land-surface datum, Sept. 15, 1976.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 11.15 JAN 13 11.29 MAR 3 11.47 MAY 10 10.68 SEP 8 12.12

451210093170201. Local number, 031N24W01CBB01. LOCATION.—Lat 45°12'10", long 93°17'02", in NW4HW4SW4 sec.l, T.31 N., R.24 W., Hydrologic Unit 07010206, at Golf Course. Owner: City of Coon Rapids. AQUIFER.--Buried sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in (0.30 m), depth 193 ft (58.8 m), screened 163 to 193 ft (49.7 to 58.8 m). DATUM.—Altitude of land-surface datum is 897 ft (273 m). Measuring point: Top of breather pipe, 2.00 ft (0.61 m) above land-surface datum. PERIOD OF RECORD.—December 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 21.20 ft (6.46 m) below land-surface datura, Dec. 30, 1980; lowest, 28.40 ft (8.66 m) below land-surface datum, May 10, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 21.74 JAN 8 21.87 MAR 3 22.22 MAY 10 28.40 SEP 8 24.43 341 GROUND-WATER LEVELS

ANOKA COUNTY—Continued

451742093122102. Local number, 032N23W04AAD02. LOCATION.—Lat 45°17'42", long 93°12'21", in SEiNSjNEJ sec.4, T.32 N., R.23 W., Hydrologic Unit 07030005, 1.5 mi (2.4 km) east of Soderville. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 m), depth 21 ft (6.4 m), screened 19 to 21 ft (5.8 to 6.4 m). DATUM.—Altitude of land-surface datum is 916 ft (279 m). Measuring point: Top of casing, 3-50 ft (1.07 m) above land-surface datura. PERIOD OF RECORD.—August 1969 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 6.20 ft (1.89 m) below land-surface datum, July 30, 1975; lowest, 13.22 ft (4.03 m) below land-surface datum, Mar. 5-9, 1977.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1932 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 9.12 JAN 13 9.63 MAR 3 9.87 MAY 10 7.75 SEP 8 10.15

452305093141501. Local number, 033N23W05BAB01. LOCATION.—Lat 45°23'05", long 93°14'15", in NWJNEJNWJ sec.5, T.33 N., R.23 W., Hydrologic Unit 07010207, at 1300 229th Ave. NE, Bethel. Owner: Friendship Baptist Church. AQUIFER.--Franconian Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 4 in (0.10 m), depth 141 ft (43.0 m), cased to 126 ft (38.4 m). DATUM.—Altitude of land-surface datum is 923 ft (28l m). Measuring point: Top of well cap, 0.80 ft (0.24 -n) above land-surface datum. PERIOD OF RECORD.—April 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 21.10 ft (6.43 m) below land-surface datum, Oct. 7, 1980; lowest, 22.22 ft (6.77 m) below land-surface datura, Mar. 3, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 21.69 JAN 13 22.00 MAR 3 22.22 MAY 10 21.77 SEP 8 21.92

451938093223101. Local number, 033N24W30ABB01. LOCATION.—Lat 45°19'38", long 93°22'31", in NWJNWJNEi sec.30, T.33 N., R.24 W., Hydrologic Unit 07010207, at 4324 Viking Blvd. Owner: Northwestern Bell Telephone Co. AQUIFER.--Ironton-Galesville Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 4 in (0.10 m), depth 280 ft (85-3 m), cased to 223 ft (68.0 m). DATUM.—Altitude of land-surface datum is 900 ft (274 m). Measuring point: Top of casing, 1.50 ft (0.46 m) above land-surface datum. PERIOD OF RECORD.—April 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 29.88 ft (9-11 m) below land-surface datura, May 10, 1982; lowest, 31.84 ft (9-70 m) below land-surface datum, July 11, 1977-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER . WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 31.70 JAN 13 31.02 MAR 3 31.25 MAY 10 29-88 SEP 8 30.87 342 GROUND-WATER LEVELS

ANOKA COUNTY—Continued

26

27

28

29

30

31

32

33

34

35

36 I I I I 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

033N24W30ABB01

452416093160801. Local number, 034N24W25DAC01. LOCATION.—Lat 45°24'l6", long 93°l6'08" 5 in SW4NEJSE4 sec.25, T.34 N., R.24 W., Hydrologic Unit 07010207, at City of Bethel. Owner: U.S. Geological Sarvey AQUIFER.—Surflclal sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 In (0.03 m), depth 21 ft (6.4 m), screened 19 to 21 ft (5.8 to 6.4 m). DATUM.—Altitude of land-surface datum is 930 ft (283 m). Measuring point: Top of casing, 2.30 ft (0.70 m) above land-surface datum. PERIOD OP RECORD.—August 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 7.73 ft (2.36 m) below land-surface datum, May 1, 1975; lowest, 10.87 ft (3-31 m) below land-surface datum, Mar. 10, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 9.35 JAN 13 9.98 MAR 3 10.34 MAY 10 SEP 8 10.10

BECKER COUNTY

465239095121601. Local number, 139N36W02CCC01. LOCATION.—Lat 46°52'39", long 95°12'l6", in SW4SW4SW4 sec.2, T.139 N., R.36 W., Hydrologic Unit 07010106, southeast of Osage. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter in (0.03 m), depth 18.5 ft (5.6 m), screened 15.5 to 18.5 ft (4.7 to 5.6 m). DATUM.—Altitude of land-surface datum is 1,460 ft (445 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—October 1974 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 7.00 ft (2.13 m) below land-surfjace datum, May 20, 1979; lowest, 11.87 ft (3.62 m) below land-surface datum, Feb. 18, Mar. 18, 1977.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 17 8.32 DEC 20 8.47 FEB 15 9.12 APR 17 7-32 JUN 12 7.41 AUG 15 7.90 NOV 14 8.39 JAN 19 8.98 MAR 13 9.20 MAY 15 7.33 JUL 16 7.50 SEP 17 8.10 343 GROUND-WATER LEVELS

BECKER COUMTY—Continued

470206095225301. Local number, 141M37W17AAA01. LOCATION.—Lat 47°02'06", long 95°22'53", in NE4NE4ME4 sec.17, T.141 N., R.37 W., Hydrologic Unit 07010106, 4.5 mi (7.2 km) north of Ponsford. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 35 ft (10.7 m) screened 33 to 35 ft (10.1 to 10.7 m). DATUM.—Altitude of land-surface datum is 1,578 ft (481 m): Measuring point: Top casing, 3.60 ft (1.10 m) above land-surface datum. PERIOD OP RECORD.—October 1974 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 26.40 ft (8.05 m) below land-surface datum, May 15, 1982; lowest, 30.64 ft (9.34 m) below land-surface datum, Sept. 15, 1977.

WATER LEVEL, IN PEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LKVEL furs LEVEL OCT 17 28.30 DEC 20 27-95 PEB 15 27.09 APR 17 27-13 JUM 12 27.15 AUG 15 27.60 NOV 14 28.02 JAM 19 27.60 MAR 13 28.45 MAY 15 26.40 JUL 16 27.36 SEP 17 27.70

24

25

26

27

28

29

30

31

32

33

34 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

I41N37W17AAA01

465840095201901. Local number, 141N37W34DDD01. LOCATION.—Lat 46°58'40", long 95°20'19", in SE4SE4SE4 sec.34, T.141 N., R.37 W., Hydrologic Unit 07010106, 1.5 mi (2.4 km) east of Ponsford. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 25 ft (7.6 m), screened 23 to 25 ft (7.0 to 7.6 m). DATUM.—Altitude of land-surface datum is 1,539 ft (469 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OP RECORD.—October 1974 to current year. EXTREMES POR PERIOD OF RECORD.—Highest water level, -16.20 ft (4.94 m) below land-surface datum, Apr. 20, 1979; lowest, 19.86 ft (6.05 m) below land-surface datum, Aug. 18, 1977.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 27 18.09 DEC 20 17.45 PEB 15 17.88 APR 17 16.62 JUM 12 16.32 AUG 15 16.48 NOV 14 17.95 JAN 19 17-75 MAR 13 18.05 MAY 15 16.78 JUL 16 16.35 SEP 17 16.82 344 GROUND-WATER LEVELS

BELTRAMI COUNTS

473023094570901. Local number, 147N34W35ADC01. LOCATION.—Lat 47°30'23", long 94°57'09", in-SWJSEJNEJ sec.35, T.147 N., R.34 W., Hydrologic Unit 07010101, on Clarence Hart farm. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1J in (0.03 m), depth 20 ft (6.1 m), screened 18 to 20 ft (5.5 to 6.1 m). DATUM.—Altitude of land-surface datum is 1,383 ft (421 m). Measuring point: Tod of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—October 1970 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 6.17 ft (1.88 m) below land-surface datum, Aug. 1, 1975; lowest, 10.63 ft (3.22 ra) below land-surface datum, Mar. 16, 1981.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 29 9.69 JAN 18 10.28 MAR 5 10.55 MAY 3 9.56 JUL 9 9.13 AUG 24 9.29 DEC 7 9-89

4

5

6

7

8

9

10

1 1

12

13

14 J____L 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 147N34W35ADC01

BENTON COUNTY

453454094002402. Local number, 036N29W30BCC02. LOCATION.—Lat 45°34'54", long 94°00'24", in SWJSWJNW* sec. 30, T.36 N., R.29 W., Hydrologic Unit 07010203, 3.7 mi (6.0 km) west of Due1m. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 n), depth 19 ft (5.8 m), screened 17 to 19 ft (5.2 to 5.8 m). DATUM.—Altitude of land-surface datum is 1,049 ft (320 m). Measuring point: Top of casing, 4.00 ft (1.22 m) above land-surface datura. PERIOD OF RECORD.—October 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 5-58 ft (1.70 m) below land-surface datum, June 30, 1979; lowest, 12.30 ft (3.75 m) below land-surface datum, Aug. 18, 1977.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

OCT 14 10.52 FEB 16 11.11 APR 5 10.08 JUN 3 9.38 AUG j» 9.68 SEP 14 10.10 DEC 9 10.62 MAR 3 11.30 MAY H 9.82 JUL 6 9-52 345 GROUND-WATER LEVELS

BENTON COUNTY—Continued

4

5

6

7

8

9

10

1 1

12

13

14 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

036N29W30BCC02

454657094143701. Local number, 038N31W18DCA01. LOCATION.—Lat 45°46'57", long 94°14'37", in NE4SW4SE* sec.18, T.38 N., R.31 W., Hydrologic Unit 07010201, 0.25 mi (0.40 km) north of Highway 10. Owner: Jerry Schlicting. AQUIFER.--Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in (0.30 m), depth 130 ft (39.6 m), screened 101 to 106 ft (30.8 to 32.3 m) and 120 to 130 ft (36.6 to 39.6 m). DATUM.—Altitude of land-surface datum is 1,070 ft (326 m): Measuring point: Hole in pump base, 1.00 ft (0.30 m) above land-surface datum. PERIOD OP RECORD.—December 1979 to June 1930. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 20.91 ft (6.37 m) below land-surface datum, Dec. 6, 1979; lowest, 26.58 ft (8.10 m) below land-surface datum, Sept. 9, 1981.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 14 26.36 DEC 9 26.10 MAY 4 25.40 JUN 3 25.23 JUL 6 25.88 SEP 14 26.31 NOV 10 26.38 APR 5 25.58

454648094144102. Local number, 038N31W18DCD02. LOCATION.—Lat 45°46 1 48", long 94°l4'4l», in SEiSW*SE4 sec.18, T.38 H., R.31 W., Hydrologic Unit 07010201, 2.4 mi (3.9 km) north of flashing light in Rice. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 36 ft (11.0 m). screened 34 to 36 ft (10.4 to 11.0 m). DATUM.—Altitude of land-surface datum is 1,065 ft (325 m). Measuring point: Top of casing, 4.60 ft (1.40 m) above land-surface datum. PERIOD OF RECORD.—October 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 23.65 ft (7-21 m) below land-surface datum, Dec. 6, 1979; lowest, 32.36 ft (9.86 m) below land-surface datum, Aug. 10, 1977.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 14 28.64 DEC 9 28.41 MAR 3 28.72 MAY 4 28.42 JUL 6 28.82 SEP 14 28.37 NOV 10 28.65 FEB 16 28.61 APR 5 28.68 JUN 3 28.26 AUQ 4 30.68 346 GROUND-WATER LEVELS

BIG STONE COUNTY

451517096104501. Local number, 121N44W27CCC01. LOCATION.—Lat 45°15'17", long 96°10'45", in SWJSWJSWJ sec.27, T.121 N., R.44 W., Hydrologic Unit 07020001, north of Correll. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 16 ft (4.9 m), screened 14 to 16 ft (4.3 to 4.9 m). DATUM.—Altitude of land-surface datum is 1,018 ft (310 m). Measuring point: Top of casing, 3-10 ft (0.94 m) above land-surface datum. PERIOD OP RECORD.—September 1972 to February 1974, August 1976 to current year. EXTREMES FOR PERIOD OF RECORD.--Highest water level, 5.09 ft (1.55 m) below land-surface datum, May 28, 1973; lowest, 8.99 ft (2.74 m) below land-surface datum, Feb. 8, 1977.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 26 8.24 DEC 31 8.39 MAR 25 8.28 JUN 8 7.6l AUG 11 7.90

453330096420201. Local number, 124N48W17AAA01. LOCATION.—Lat 45°33'30", long 96°42'02", in NEJNEJNEJ sec.17, T.124 N., R.48 W., Hydrologlc Unit 07020001, 0.5 mi (0.8 km) east of Beardsley. Owner: U.S. Geological Survey. AQUIFER.—Buried sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 2 in (0.05 m), depth 282 ft (86.0 m), screened 242 to 282 ft (73.8 to 86.0 m). DATUM.—Land-surface datum is 1,086.8 ft (331.3 m) National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 2.70 ft (0.82 m) above land-surface datum. PERIOD OF RECORD.—November 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 10.90 ft (3-32 m) below land-surface datum, Apr. 11, 1979; lowest, 21.75 ft (6.63 m) below land-surface datum, Aug. 25, 1982.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 198! TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 26 15.72 DEC 23 15.80 MAR 24 15-94 JUN 3 15.93 AUG 25 21.75

453237096381601. Local number, 124N48W23AAA04. LOCATION.—Lat 45°32'37", long 96°38'l6", in NEJNEJNEJ sec.23, T.124 N., R.48 W.|, Hydrologic Unit 07020001, 3-5 mi (5.6 km) southeast of Beardsley. , Owner: U.S. Geological Survey. AQUIFER.--Buried sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 2 in (0.05 m) :, depth 240 ft (73.2 m), screened 200 to 240 ft (61.0 to 73.2 m). DATUM.—Land-surface datum is 1,087.2 ft (331.4 m) National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 1.00 ft (0.30 m) above land-surface datum. PERIOD OF RECORD.—November 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 39.25 ft (11.96 m) below land-surface datum, Jan. 28., 1979; lowest, 41.02 ft (12.50 m) below land-surface datum, Aug. 25, 1982.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 26 40.62 DEC 23 40.65 MAR 24 40.48 JUN 3 40.94 AUG 25 41.02 347 GROUND-WATER LEVELS

BLUE EARTH COUNTY

440050094102801. Local number, 106N28W03DBA01. LOCATION.—Lat°44 00'50", long 94°10'28", in MEJNWJSEi sec.3, T.106 N., R.28 W., Hydrologic Unit 07020010, at Farmland Industries Ammonia Plant, 3.2 mi (5.2 km) north of Vernon Center. Owner: Farmland Industries. AQUIFER.—Ironton-Galesville Sandstones of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 16 in (0.41 m), depth 390 ft (119 m), cased to 150 ft (45-7 m). DATUM.—Altitude of land-surface datum is 1,005 ft (306 m). Measuring point: Top of recorder floor, 2.00 ft (0.61 m) above land-surface datum. PERIOD OF RECORD.—October 1973 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 72.37 ft (22.06 m) below land-surface datum, June 21, 1974; lowest, 76.17 ft (23.22 m) below land-surface datum, Aug. 17, 1977-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1932 LOWEST VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUhl JUL AUG SEP

5 74.57 74.79 74 .95 ...... 74 .97 74.97 73 .68 ..... 74.27 10 74.62 74.87 74 .95 ...... 74.18 74 .97 73.81 73 .66 ...... 74.11 15 74.61 74.76 74 .73 ...... 73 ,86 73.80 73 .55 ..... 74.34 20 74.60 74.59 74 .76 ...... 74 .14 73.78 73 .51 ..... 74.29 25 74.85 74.91 ...... 73 .95 73.74 73 .65 ..... 74.11 74.28 EOM 74.61 75.13 ...... 74 .17 73.55 74.18 74.24 WTR YEAR 1982 HIGHEST 73-37 JUN 14, 1982 LOWEST 75.14 DEC 1, 1981

441134093505301. Local number, 108N25W04BBC01. LOCATION.—Lat 44°11'34", long 93°50'53", in SWJNWJNWJ sec.4, T.108 N., R.25 W., Hydrologic Unit 07020011, 1.3 mi (2.1 km) west of Madison Lake at waste treatment plant. Owner: City of Madison Lake. AQUIFER.—Prairie du Chien Group of Early Ordovician Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 6 in (0.15 m), depth 313 ft (95.4 m), cased to 296 ft (90.2 m). DATUM.—Altitude of land-surface datum is 1,036 ft (316 m). Measuring point: Top of casing, 1.60 ft (0.49 m) above land-surface datum. PERIOD OF RECORD.—May 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 94.72 ft (28.87 m) below land-surface datum, Sept. 15, 1982; lowest, 95.42 ft (29.08 m) below land-surface datum, July 16, 1981.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

NOV 9 95.26 MAR 5 95.23 MAY 17 94.75 SEP 15 94.72

BROWN COUNTY

441030094254501. Local number, 108N30W09ADD01. LOCATION.—Lat 44°10'30", long 94°25'45", in SEiSEJNEi sec.9, T.108 N., R.30 W., Hydrologic Unit 07020007, 3.7 mi (6.0 km) northeast of Hanska. Owner: Erwin Kjelshus. AQUIFER.—Deposits of Pleistocene Age. WELL CHARACTERISTICS.—Bored unused water-table well, diameter 16 in (0.41 m), depth 32 ft (9-8 m), cased to 32 ft (9-8 m), open end. DATUM.—Altitude of land-surface datum is 1,003 ft (306 m). Measuring point: Top of concrete cover, at land- surface datum. REMARKS.—Measured by Erwin Kjelshus. Water level used in monthly Water Resources Review. PERIOD OF RECORD.—July 1942 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 2.27 ft (0.79 m) below land-surface datum, Aug. 10, 1979; lowest, 22.00 ft (6.71 m) below land-surface datum, Mar. 2, 1977-

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 8 5.12 DEC 23 5.40 APR 22 3.59 MAY 30 4.57 JUL 8 5.60 AUG 18 7.52 21 4.85 JAN 27 6.15 30 4.20 JUN 18 4.95 23 6.00 SEP 3 7.40 NOV 13 5.28 FEB 16 6.77 MAY 20 4.54 28 5.25 AUG 4 6.68 21 6.38 DEC 4 5.04 MAR 25 3.68 348 GROUND-WATER LEVELS

BROWN COUNTY—Continued

441800094434301. Local number, 110N32W30DDBO1. LOCATION.—Lat 44°l8'00", long 94°43'43", in NWJSEJSEJ sec. 30, T.110 N., R.32 W., Hydrologic Unit 07020008, in Sleepy Eye at hospital. Owner: City of Sleepy Eye. AQUIFER.--Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 2 in (0.05 m), depth 176 ft (53.6 m). DATUM.—Altitude of land-surface datum is 1,030 ft (314 m). Measuring point: Top of casing, 1.30 ft (0.40 m) above land-surface datum. REMARKS.—Water level affected by pumping from nearby wells. PERIOD OF RECORD.—August 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 52.40 ft (15.97 m) below land-surface datum, June 3, 1980; lowest, 118.1 ft (36.00 m) below land-surface datum, Sept. 15, 1976.

WATER LEVEL, IN FEET BELOW LAMD SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATA LEVEL DATE LEVEL DATE LEVEL OCT 1 63.10 DEC 1 58.20 FEB 1 55.50 APR 1 55.20 JUN 2 52.70 AUU 2 57.50 MOV 3 61.20 JArt 4 54.70 MAR 1 55.30 MAY 4 53-20 JUL 2 56.10 SEP 1 59.90

30

40

,50

60

70 —

80

90

100 f—

1 10

120 —

1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

110N32W30DDB01

CARLTON COUNTY

162712092453401. Local number, 046N19W21CBB01. LOCATION.—Lat 46°27'12", long 92°45'34", in NWJNW4SWJ sec.21, T.46 M., R.19 W., iHydrologic Unit 07030003, in Moose Lake at water tower. Owner: City of Moose Lake. AQUIFER.—Surflclal sand of Pleistocene Age. WELL CHARACTERISTICS.—Dug unused water-table well, diameter 120 in (3.0 m), deptlh 43 ft (13.1 m), screened 33 to 43 ft (10.1 to 13.1 m). DATUM.—Altitude of land-surface datum is 1,061 ft (323 m). Measuring point: Tolp of concrete cover, 1.10 ft (0.34 m) above land-surface datum. PERIOD OF RECORD.—August 1967 to May 1969, July 1979 to current year. EXTREMES FOR PERIOD OF RECORD.--Highest water level, 20.35 ft (6.20 m) below land-surface datum, Oct. 25, 1968: lowest, 23.30 ft (7.10 m) below land-surface datum, Feb. 20, 1981.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL MAR 29 22.59 MAY 5 21.18 JUN 11 22.03 JUL 15 22.16 SEP 6 22.75 349 GROUND-WATER LEVELS

CARLTON COUNTY—Continued

^63747092372701. Local number, 048N18W21ACD01. LOCATION.—Lat°46 37'47", long 92°37'27", In SE4SW4NS4 sec.21, T.48 M., R.18 W., Hydrologlc Unit 07030003, on Clarence Gustafson farm. Owner: U.S. Geological Survey. AQUIFER.—Surflcial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter \\ in (0.04 m), depth 52 ft (15.8 m), screened 50 to 52 ft (15.2 to 15.8 m). DATUM.—Altitude of land-surface datum is 1,280 ft (390 m). Measuring point: Top of casing, 3.80 ft (1.16 m) above land-surface datum. PERIOD OP RECORD.—December 1977 to vcurrent year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 20.17 ft (6.15 m) below land-surface datum, Sept. 6, 1982; lowest, 23.37 ft (7-12 m) below land-surface datum, Mar. 29, 1982.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

MAR 29 23-37 MAY 5 20.60 JUN 11 20.49 JUL 15 20. ( SEP 6 20.17

16

17

18

19

20

21

22

23

24

25

26 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

048N18W21 ACD01

CARVER COUNTY

445155093320101. Local number, 116N23W12CDB01. LOCATION.—Lat 44°51'55", long 93°32'01", in NW4SE4SW4 sec.12, T.116 N., R.23 W., Hydrologic Unit 07020012, at Chanhassen water tower. Owner: City of Chanhassen, well 1. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled public supply artesian well, diameter 10 in (0.25 m), depth 518 ft (158 m), cased to 424 ft (129.2 m). DATUM.—Altitude of land-surface datum is 990 ft (302 m). Measuring point: Edge of vent pipe, 2.40 ft (0.73 m) above land-surface datum. REMARKS.—Water level affected by pumping from nearby wells. PERIOD OF RECORD.—June 1975 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 130.3 ft (39.72 m) below land-surface datum, Oct. 13, 1965; lowest, 150.2 ft (45.78 m) below land-surface datum, Sept. 9, 1982.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 2 148.2 JAN 6 MAR 1 146.6 MAY 5 148.4 SEP 150.2 350

CARV-SR COUNTY--Continued uj 1 26 o < LL. 9= 129 g 132 < _i 3 135 o

£ 138

Ld u 141 (-

~ 1 44 cc £ 147 < 3 o 1 50

^ 153 H Q_ UJ D 1 56 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

116N23W12CDB01

462720094U33801. Local number, 135N32W33CDDO1. LOCATION.—Lat 46°27'20", long 94°43'38", In SEJSEiSWi sec.33, T.135 N., R.32 W. , Hydrologin TJnit 07010106, northwest of Motley. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, liameter 14 in (0.03 m), depth 15 ft (4.6 m), screened 13 to 15 ft (4.0 to 4.6 m). DATUM.—Altitude of land-surface datum is 1,264 ft (385 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—October 1974 to current year. EXTHEi'ISS FOR PERIOD OF RECORD.—Highest *ater level, 3.83 ft (1.17 m) below land-surface datum, Apr. 23, 1982; lowest, 8.18 ft (2.49 m) below land-surface datura, Feb. 16, 1977. WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEV3L DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 28 4.55 DEC 29 5.16 FEB 25 5.61 APR 23 3-83 JUN 29 4.13 AUG 31 5.36 NOV 24 4.81 JAN 28 5.44 MAR 29 5.66 MAY 28 3.87 JUL 22 4.36 SEP 20 5.61

2

3 I—

4

5

6 —

~7 ____

8 —

9 —

0 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

135N32W33CDD01 GROUND-WATER LEVELS 351

CASS COUNTY—Continued

464629094420901. Local number, 138N32W15AAA01. LOCATION.—Lat 46°46'29", long 94°42'09", in NE4NE4NE4 sec.15, T.138 N., R.32 W., Hydrologic Unit 07010106, 6 mi (9.6 km) south of Badoura State Nursery. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 15 ft (4.6 m) screened 13 to 15 ft (4.0 to 4.6 m). ' DATUM.—Altitude of land-surface datum is 1,418 ft (432 m): Measuring point: Top of casing, 3.00 ft (0.91 m) above land=surface datura. PERIOD OP RECORD.—October 1974 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 4.86 ft (1.48 m) below land-surface datum, May 24 1980- lowest, 12.04 ft (3.67 m) below land-surface datura, Apr. 15, 1977.

WATER LEVEL, IN FEET BELOW LAMD SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 28 8.03 DEC 29 8.51 FEB 25 9.12 APR 23 7.59 JUN 29 7.03 AUG 31 7.72 NOV 24 8.37 JAN 28 8.79 MAR 29 9-20 MAY 28 6.38 JUL 22 7.02 SEP 20 7.97

;HIPPEWA COUNTY

450447095490101. Local number, 119N41W29DDD01. LOCATION.—Lat 45°04'47", long 95°49'01", in SEJStSjSEJ sec.29, T.119 N., R.41 W., Hydrolozic Unit 07020005 5 mi (8.1 km) north of Watson. ' ' Owner: U.S. Geological Survey. AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 19 ft (5.8 m), screened 17 to 19 ft (5.2 to 5.8 m). DATUM.—Altitude of land-surface datum is 992 ft (302 m). Measuring point: Top of casing, 3.75 ft (1.14 m) above land-surface datum. PERIOD OF RECORD.—September 1972 to February 1974, January 1977 to current" year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 4.23 ft (1.29 m) below land-surface datum, May 7 1973- lowest, 9.06 ft (2.76 m) below land-surface datum, Feb. 8, 1977.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 26 5.81 DEC 31 6.59 MAR 25 5.27 JUN 8 AUG 11

10

1 1

12 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

119N41W29DDD01 352 GROUND-WATER LEVELS

CHIPPEWA COUNTY--Continued 450631095562201. Local number, 119N42W17DDD01. LOCATION.—Lat 45°06'31", long 95°56'22", in SE4SG4Sfi4 sec.17, T.119 N., R.42 W., Hydrologic Unit 07020001, west of Milan. Owner: U.S. Geological Survey. AQUIFER.--Surficial silt of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m) depth 19 ft (5.8 rn) screened 17 to 19 ft (5.2 to 5.8 m). ' DATUM.—Altitude of land-surface datum is 1,027 ft (313 m). Measuring point: Top of casing, 4.50 ft (1.37 m) above land-surface datum. PERIOD OF RECORD.—September 1972 to October 1973, April 1977 to current year. ! EXTREMES FOR PERIOD OP RECORD.—Highest water level/ 1.50 ft (0.46 m) below land-surface datum, May 7 1973- lowest, 17.46 ft (5.32 m) belorf land-surface datum, 4pp. 1, 1977. '

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE DATE LEVEL OCT 26 7.80 MAR 25 5.86 APR 13 5.97 JON 8 6.54 JUL 20 6.44 AUT 11 DEC 31 9.65

CHI3AGO COUNTY

452014092595102. Local number, 033N21W20BBCO2. LOCATION.—Lat 45°20'l4", long 92°59'51", in SW4MW4NW4 sec.20, T.33 N., R.21 W., Hydrologic Unit 07030005, at City of Wyoming. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 m), depth 20 ft (6.1 m) screened 18 to 20 ft (5-5 to 6.1 m). DATUM.—Altitude of land-surface datum is 905 ft (276 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—August 1969 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 6.57 ft (2.00 m) below land-surface datum, July 11 1975- lowest, 11.70 ft (3.57 m) below land-surface datum, Feb. 24, 1970.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEtfEL OCT 7 9.21 JAN 5 9.71 FEB 16 10.18 APR 1 9.86 MAY 24 8.25 JUL 27 9.10 NOV 17 9-31

4

5

6

7

8

9

10

1 1

12

13

1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 19?t 1978 1979 1980 1981 1982

033N21W20BBC02 353 GROUND-WATER LEVELS

CHISAGO COUNTY—Continued

453138092445502. Local number, 035N19W17BA302. LOCATION.—Lat 45°31'38", long 92°44'55", in iWJNEjNWJ sec.17, T.35 N., R.19 W., Hydrologic Unit 07030005, at Wild River State Park. Owner: State of Minnesota. AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL, CHARACTERISTICS.—Drilled domestic water-table well, diameter 6 in (0.15 m), depth 110 ft (33.5 m), screened 104 to 110 ft (31.7 to 33.5 m). DATUM.—Altitude of land-surface datum is 860 ft (262 m). Measuring point: Top of casing, 1.00 ft (0.30 m) above land-surface datum. PERIOD OP RECORD.—October 1980 to September 1981. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 53.25 ft (16.23 rn) below land-surface datum, July 27, 1982; lowest, 55.81 ft (17.01 m) below land-surface datum, Nov. 17, 1981.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCT03ER 1931 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

OCT 7 53-57 JAN 5 53.82 FEB 16 54.06 APR 1 54.26 MAY 24 53.45 JUL 27 53.25 NOV 17 55-81

453125092445401. Local number, 035N19W173DB01. LOCATION.—Lat 45°31'25", long 92°44'54", in NWJSEJNWi sec.17, T.35 N., R.19 W., Hydrologic Unit 07030005, at Wild River State Park. Owner: State of Minnesota. AQUIFER.—Mount Simon Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 6 in (0.15 m), depth 270 ft (82.3 m), cased to 230 ft (70.1 m). DATUM.—Altitude of land-surface datum is 820 ft (250 m). Measuring point: Top of casing, 0.70 ft (0.21 m) above land-surface datum. PERIOD OF RECORD.—October 1980 to September 1981. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 43.01 ft (13.11 m) below land-surface datum, May 24, 1982; lowest, 44.06 ft (13.43 m) below land-surface datum, Mar. 11, 1981.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 7 43.47 JAN 5 43-55 FEB 16 43.05 APR 1 43-98 MAY 24 43.01 JUL 27 43.19 NOV 17 43.39

452936092561901. Local number, 035N21W26BCC01. LOCATION.—Lat 45°29'36", long 92°56'19", in SWJSWJNW* sec.26, T.35 N., R.21 W., Hydrologic Unit 07030005, southeast of North Branch. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 26 ft (7.9 m), screened 24 to 26 ft (7.3 to 7.9 m). DATUM.—Altitude of land-surface datum is 894 ft (272 m). Measuring point: Top of casing, 2.00 ft (0.6l m) above land-surface datum. PERIOD OF RECORD.—September 1968 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 10.42 ft (3.18 m) below land-surface datum, July 11, 1975; lowest, 15.54 ft (4.74 m) below land-surface datum, Apr. 4, 1975.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 7 14.27 JAN 5 14.51 FEB 16 14.95 APR 1 14.98 MAY 24 13.80 JUL 27 13.85 NOV 17 14.12 0 0 M "n o z: > tr -t 00 W i-o O SC > tr-t PJ 0 G ><: PI > MO OOO M Cj > P3» OOJ 0 1-3 > t-3 PO 1-3 tr G o Ul 0 Hd 1-3 PO 1-3 tr c OU1 1-3 r-J 33MpOGt-J trt-< ^ > ro MPOMPO GrorrM -—- p=. -Cr ro Ki o OT O cr 3 o *xi -~] t-3 ui o m o cr soo iij CTM-3U1 Ul VD s; 3 o o • . o M . i-i oe s s o o . o PI . I—I OO CDPJ < i ui ,25 PO o ro o o CD PJ • : SM3 ct tij > ct pc i 3 pr • ui ct hg > pa i ; - rrj r-J r-J O>ICD3lro » IT) r-1 1—' ro > i i tr sc OPcPOct OGOT^lUl O PD PO ct Ul O CO ' M3 VO PI > t-j popj3i-j-t-'HC'- rrui ro po PJ 3 H- 1-3 P • . . <^ o oactroPJT 3pooj £r O tt ct "J PJ fj CO CO PJ PI _ • TJOIC- PO 1-! OctO • h3 O I C ct PC •-!> M3 OO tr PO j O PJ PD CO O, Ul 1— t H- G ""3 »-• ro PJ pu co a M f- < i~3 OOpDOPCD COO. ctj^. OOpoOP CD^^COO : 1— 1 • T l~t)l-3l-J-COD"OO Ml M > T —J h3 H- I "> C I •-!> O • M PO ' Ct a I PO Hj o C: I-1 :2 o co -^ O O CD i-1 ct . 01 i • - o —J -x) < P O I P i Ul P • CD i-fc p I 3 I OOt-1 -tpo3 poa—jcnai O PJ cr cr I . O C O CD C CO CT\ T O I 3 Ol 3 £ CD •-!> ( 3 Q. i o DEPTH TO WATER. IN FEET BELOW LAND SURFACE VD

CO * CD C p J3 T cr cr '"D I'D

ct M C » 3

K PO ro i-1 VD Ul

tr s; PD 3= < 1-3 M W tr1 PO

OOOO

OMjO

00 > PJ G ^D O

ro oo tr pa 355 GROUND-WATER LEVELS

CROW WING COUNTY

463006094131201. Local number, 135N28W16CCD01. LOCATION.—Lat 46 O 30'06", long 94°13'12", in SE4SW4SWJ sec.l6, T.135 «., R.28 W., Hydrologic Unit 07010106, northwest of Merrifield. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 18 ft (5.5 m), screened 16 to 18 ft (4.9 to 5-5 m). D1TUM.—Altitude of land-surface datum is 1,212 ft (369 m). Measuring point: Top of casing, 2.00 ft (0.61 m) above land-surface datum. PERIOD OP RECORD.—October 1970 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 8.50 ft (2.59 m) below land-surface datum, May 12, 1975; lowest, 11.75 ft (3.58 m) below land-surface datum, July 17, 1982.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

OCT 4 10.26 DEC 20 10.20 PEB 28 10.16 MAY 1 9.20 JUL 2 11.11 AUG 13 11.38 16 10.20 26 10.15 MAR 6 10.32 15 10.16 9 11.10 ?0 11.30 NOV 1 9.80 JAN 2 10.25 14 10.31 21 10.90 17 11.75 28 11.54 7 9.75 16 10.35 APR 3 10.28 JUN 4 10.75 22 11.10 SEP 7 11.60 21 10.05 30 10.30 10 10.25 18 11.13 30 11.22 11 11.60 28 10.05 PEB 20 10.00 17 9-70 25 10.10 AUG 6 11.35 25 11.50

DAKOTA COUNTY

445040093102201. Local number, 027N23W09ABD01. LOCATION.—Lat 44°50'40", long 93°10'22", in SE4NW4NE* sec.9, T.27 N., R.23 W., Hydrologic Unit 07020012, at Eagan. Owner: City of Eagan, Timberline Addition. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled public-supply artesian well, diameter 10 in (0.25 m), depth 503 ft (153 m), cased to 401 ft (122 m). DATUM.—Altitude of land-surface datum is 900 ft (274 m). Measuring point: Hole in well cap, 2.60 ft (0.79 m) above land-surface datum. REMARKS.—Water-level affected by pumping. PERIOD OP RECORD.—December 1965, April 1966, December 1966, March 1967, December 1970, August 1971, August 1977 to current year. EXTREMES POR PERIOD OF RECORD.—Highest water level, 141.4 ft (43.10 m) below land-surface datum, Apr. 5, 1966; lowest, 155.5 ft (47.40 m) below land-surface datum, Sept. 7, 1978.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

NOV 150.4 JAN 6 146.7 MAR 2 148.5 MAY 13 SEP 9

1 40

142

144

146

148

150 *--.__

152

154

156

158 I____I 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

027N23W09ABD01 356 GROUND-WATER LEVELS

DAKOTA COUNTY--Continued

444702093170101. Local number, 027N24W34BDC01. LOCATION.—Lat 44°47'02", long 93°17'01" 5 in SW4SE4NW4 sec.34, T.27 N., R.24 U., Hydrologic Unit 07020012, at Burnsville recycling center. Owner: City of Burnsville. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 6 in (0.15 m), depth 220 ft (67.! m), cased to 180 ft (54.9 m). DATUM.—Altitude of land-surface datum is 725 ft (221 m). Measuring point: Top of well cap, 2.70 ft (0.82m) above land-surface datum. REMARKS.—Water level affected by pumping from nearby city wells. PERIOD OP RECORD.—July 1975 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 7.50 ft (2.29 m) above land-surface datum, Sept. 12, 1975; lowest, 42.00 ft (12.30 m) below land-surface datum, July 22, 1975.

WATER LEVEL, IN FEET BELOW OR ABOVE (+•) LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1932

WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL HATE NOV 6 4.63 MAR 1 MAY 6 11.60 SEP 10 !.40

445330093054301. Local number, 028N22W19DCC02. LOCATION.—Lat 44°53'30", long 93°05'43", in SW4SW4SE4 sec.19, T.28 N., R.22 W., Hydrologic Unit 07010206, in West St. Paul. Owner: U.S. Geological Survey, 2-N. AQUIFER. — Prairie du Chien Group of Early Ordovician Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 6 in (0.15 m), depth 539 ft (L64 m), cased to 407 ft (124 m). DATUM.—Land-surface datum is 1,036.8 ft (316.0 m) National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 2.60 ft (0.79 m) above land-surface datum. REMARKS.—Water level affected by regional pumping. PERIOD OP RECORD.—January 1971 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 310.4 ft (94.61 m) below land-surface datum, Nov. 9, 1971; lowest, 328.0 ft (99-97 m) below land-surface datum, July 31, 1975*

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 LOWEST VALUES DAY OCT NOV DEC JAN PEB MAR APR JUN JUL SEP

5 313.4 314.3 314.2 313.5 314.4 314.3 313.4 317.3 320.9 324.8 318.2 10 313.9 314.4 314.4 314.3 313.8 314.0 313.0 317.9 321.9 322.4 315.3 15 314.4 314.1 314.0 314.4 313.4 ~> i o Q 313.0 315.4 317.8 322.3 320.8 20 313.9 314.4 314.4 314.4 313.5 313.9 315.8 318.3 323.1 321.2 313.3 314.0 314.0 314.6 314.0 315.5 318.1 322.7 319.8 EOM 314.2 313.3 313. 9 314.3 314.3 314.0 314.7 317.0 323.8 317.3 WTR YEAR 1982 HIGHEST 311.8 APR 12, 1982 LOWEST 324.8 AUG 5, 1982

443146093002201. Local number, 112N18W08ABA01. LOCATION.—Lat 44°31'46", long 93°00'22", in NE*NW4NEJ sec.8, T.112 N., R.18 W., Hydrologic Unit 07040002, northeast of Randolph. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 44 (13.4 m), screened 42 to 44 ft (12.8 to 13.4 m). DATUM.—Altitude of land-surface datum is 880 ft (268 m). Measuring point: Top of casing, 3.40 ft (1.04 m) above land-surface datum. PERIOD OP RECORD.—April 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 19.88 ft (6.06 m) below land-surface datum, Sept. 18, 1979; lowest, 23.80 ft (7.25 m) below land-surface datum, Feb. 21, 1979.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 19'8l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVfeL DATE LEVEL NOV 4 21.03 JAN 12 21. j MAR 4 22.09 MAY 4 20.98 SEP 13 20.23 PJ TI o =5 > X M > MO i-3 53 i-3 f G M 33 (-I'd G ct f M 33 OpjOH-SO 'i) P * 3 OW • 0 P3 3 (D PJ !D I O^KS'OO' W CO O- I -trs> • SI O ct »x] 3=- 3J I 3 M *• ^ roh-'^^'lfD'O O33- ctctOTfTD' I—' 33 P3 fO H- (-3 T • • * i-o o

i o "-ft 3 o ft

DEPTH TO WATER. IN FEET BELOW LAND SURFACE DEPTH TO WATER. IN FEET BELOW LAND SURFACE

PJ >~ 358

DAKOTA COUNTY--Continued

442830093085201. Local number, 112N19W30DBD01. LOCATION.—Lat 44°28'30", long 93°08'52", in SBilMiSEi sec.30, T.112 N., R.19 W. , Hydrologic Unit 07040002, at Northfield waste treatment plant. Owner: City of Northfteld. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 6 in (0.15 m), depth 275 ft (83.8 ra), cased to 212 ft (64.6 m). DATUM.—Altitude of land-surface datum is 890 ft (271 m). Measuring point: Center OF pressure guage, 2.05 ft (0.62 m) above land-surface datum. PERIOD OP RECORD.—May 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 13.83 ft (4.22 m) above land-surface datum, Nov. 5, 1979; lowest, 9.44 ft (2.88 m) above land-surface datum, July 10, 1981, Mar. 4, 1982.

WATER LEVEL, IN FEET ABOVE LAND SURFACE DATUM, WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 4 10.14 JAN 12 9.56 MAR 4 9.44 MAY 4 10.71 S3P 13 10.71

443645093014701. Local number, 113N18W07BAC01. LOCATION.—Lat 44°36'45", long 93°01'47", in SW4NE4NW4 sec.7, T.113 N., R.18 W., Hydrologic Unit 07040001, west of Hampton. Owner: Eugene Dohmen. AQUIFER.—Prairie du Chien Group of Early Ordovician Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 16 in (0.41 m), depth 325 ft (99-1 m), cased to 65 ft (19.8 m). DATUM.—Altitude of land-surface datum is 915 ft (217 m). Measuring point: Hole in pump base, 1.60 ft (0.49 m) above land-surface datum. PERIOD OF RECORD.—April 1977 to August 1977, January 1978, June 1979 to current year. EXTREMES FOR PERIOD OF RECORD.--Highest water level, 29-75 ft (9.07 m) below land-surface datum, Dec. 10, 1979; lowest, 33-19 ft (10.12 m) below land-surface datum, Aug. 12, 1977-

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL | DATE LEVEL NOV 4 31.99 JAN 7 32.40 MAR 4 32.34 MAY 4 30.98 ! SEP 13 31.60

44420592500001. Local number, 114N17W10AAA01. LOCATION.—Lat 4i'°42'05", long 92°50'00", in NE4NEJNE4 sec.10, T.114 N., R.17 W., Hydrologic Unit 07040001, southeast of Hastings. Owner: John Conzetnius. AQUIFER.—Prairie du Chien Group of Early Ordovician Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 4 in (0.10 m), depth 151 ft (46.0 m), depth of casing unknown. DATUM.—Altitude of land-surface datum is 827 ft (252 m). Measuring point: Top of platform, 2.50 ft (0.76 m) above land-surface datum. i PERIOD OF RECORD.—April 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 98.82 ft (30.12 m) below land-surface datum, July 26, 1978; lowest, 107.4 ft (32.74 m) below land-surface datum, Mar. 12, 1978.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 LOWEST VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUQ SEP 5 ..... 104.1 104.6 ..... 104.7 103.4 103.2 103.5 103.8 104.7 104.9 10 ...... 104.6 103.0 103.2 103.5 104.0 104.7 104.7 15 104.1 ...... 104.7 103.0 103-3 103.5 104.3 104.9 104.9 20 ...... 104.6 103-2 103.4 103.5 104.3 104.9 104.9 25 ...... 104.4 103.2 103.4 103.6 104.3 104.8 105.0 EOM ...... 103.8 103.9 103.4 103.8 104.4 104.8 105.0 WTR YEAR 1982 HIGHEST 102.6 APR 12, 1982 LOWEST 105.0 SEP 30, 1982 359

DAKOTA COUNTY--Continued

444101092500001., Local number, 114N17W15ADA01. LOCATION.—Lat 44°4l'01", long 92°50'00", In NE4334ME4 sec.15, T.114 N., R.I? W., Hydrologic Unit 07040001, 1.5 ml (2.4 km) south of State Highway 3l6. Owner: Schult^; and Swanson. AQUIFER.—Surficlal sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused water-table well, diameter 5 in (0.13 m), depth 119 ft (36.3 m), screen information not available. DATUM.—Altitude of land-surface datura is 820 ft (250 31). Measuring point: Top of pump flange, 0.50 ft (0.15 m) above land-surface datum. ft- & , \ ±j / PERIOD OF RECORD.—April 1977 to current year EXTREMES FOR PERIOD OF RECORD.-Highes t water level, 93.35 ft (23.61 m) below land-surface datum, 4pr. 7, 1980- lowest, 100.0 ft (30.48 m) below land-surface datura, June 27, 1978.

WATER LEV3L, IN FEET BELOrf LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER LEVEL DATE LEVEL DATE LEVEL DATE LEVEL 96.35 MAR 5 96.67 MAY 4 96.43 SEP 10 97.50

444047092521901. Local number, 114N17W16C8801. LOCATION.—Lat 44°'40' 47", long 92°52'19", in NWJNW4SW4 sec.16, T.114 N., R.17 W. , Hydrologic Unit 07040001, Xirby Avenue, 0.5 mi (0.8 Km) north of 190th Street. Owner: Jim Huneke Construction Company. AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled domestic water-table well, diameter 4 in (0.10 m), depth 170 ft (51.8 m), screened Ibl to 170 ft (50.0 to 51.8 m). DATUM.--Altitude of land-surface datum is 823 ft (251 m). Measuring point: Top of casing, 1.10 ft (0.34 m) above land-surface datura. PERIOD OF RECORD.—March 1976, March 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 80.98 ft (24.68 m) below land-surface datum, Apr. 7, 1980- lowest, 87.75 ft (26.75 m) below land-surface datum, June 27, 1978.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 2 83.59 JAN 7 83-75 MAR '4 84.02 MAY 4 83.69 SEP 10 85.78

79

80

81

82

83

84

85

86

87

88 —

89 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

114N17W16CBB01 360 GROUND-WATER LEVELS

DAKOTA COUNTY—Continued

443827092521801. Local number, 114N17W33BBC01. LOCATION.—Lat 44°38'27", Ion? 92°52'l8" ) in SW4Nrf4NW4 sec.33, T.114 N., R.17 W., Hydrologic Unit 07040001, 39 ft (11.9 m) south of irrigation well. Owner: Rainer Kimmes. AQUIP3R.—Prairie du Chien Group of Early Ordovician Age. WELL CHARACTERISTICS.—Drilled unused ^ater-table well, diameter 16 in (0.41 m), depth 290 ft (88.4 m), cased to 25 ft (7.6 m). DATUM.—Altitude of land-surface dat m is 862 ft (263 m). Measuring point: Hole in plate over well, 2.00 ft (0.6l m) above land-surface datum. PSRIOD OP RECORD.—August 1977 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 64.08 ft (19.53 m) below land-surface datum, Jan. 16, 1980; lowest, 78.52 ft (23.02 m) below land-surface datum, Aug. 10, 1977.

WATER LEVEL, IN FEET BELO.V LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 4 69-95 MAR 4 70.74 MAY 4 69-40 SEP 10 75.10

444117092595701. Local number, 114N18W17AA601. LOCATION.—Lat 44°4l'17", long 92°59'57", in NW4NE4NE4 sec.17, T.114 N., R.l8 W., Hydrologic Unit 07040001, 180th Street, 0.25 mi (0.40 km) west of Emery Avenue. Owner: Joe Ries. AQUIFER.—Prairie du Chien Group of Early Ordovician Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 16 in (0.41 m), depth 280 ft (85-3 m), cased to 39 ft (11.9 m). DATUM.—Altitude of land-surface datum is 905 ft (276 m). Measuring point: Edge of vent pipe, 1.40 ft (0.43 m) above land-surface datum. PERIOD OF RECORD.—June 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest *rater level, 65-81 ft (20.06 m) below land-surface datum, June 11, 1979; lowest, 73-52 ft (22.41 m) below land-surface datum, Sept. 13, 1982.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 2 70.80 JAN 7 71.00 MAR 4 71.04 MAY 4 68.34 SEP 13 73.52

443301092571301. Local number, 114N18W35CCB01. LOCATION.—Lat 44°38'01", long 92°57'13", in NW4SW4SW4 sec.35, T.114 N., R.18 W., Hydrologic Unit 07040001, Goodwin Avenue, 1.1 mi (1.8 km) south of Northfield Boulevard. Owner: Al Wagner, Jr. AQUIFER.--Buried gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in (0.30 m), depth 203 ft (61.9 m), screened 173 to 203 ft (52.7 to 61-9 m). DATUM.—Altitude of land-surface datum is 898 ft (274 m). Measuring point: Hole in pump base, 1.25 ft (0.38 m) above land-surface datum. PERIOD OF RECORD.—June 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 31.11 ft (9.48 m) below land-surface datum, June 12, 1979; lowest, 38.28 ft (11.67 m) below land-surface datum, Sept. 13, 1982.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 4 35.45 JAN 7 35.87 MAR 4 35-96 MAY 4 34.13 SEP 13 38.28 361 GROUND-WATER LEVELS

DAKOTA COUNTY—Continued

444220093055001. Local number, 114N19W04DAC01. LOCATION.—Lat 44°42'20", long 93°05'50", In SW4NE4SE4 sec.4, T.114 N., R.19 W., Hydrologic Unit 07040001, 2.1 mi (3.4 kin) southeast of Rosemount. Owner: University of Minnesota Agricultural Experiment Station (Plant Pathology). AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 6 in (0.15 m), depth 415 ft (126 m), cased to 355 ft (108 m). DATUM.—Altitude of land-surface datum is 94? ft (289 m). Measuring point: Top-of 1-inch breather pipe, 2.10 ft (0.64 m) above land-surface datum. PERIOD OP RECORD.—August 1970 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 61.02 ft (18.60 m) below land-surface datum, Dec. 4, 1979; lowest, 65.23 ft (19.88 m) below land-surface datum, Nov. 27, 1970.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 2 63.00 JAN 7 63-40 MAR 4 63.57 MAY (. 62.64 SEP 13 63.17

443831093074201. Local number, 114N19W32BAD01. LOCATION.—Lat 44°38'31", long 93°07'42", in SE4NE4NW4 sec.32, T.114 N., R.19 W., Hydrologic Unit 07040001, at City of Farmington. Owner: U.S. Geological Survey. AQUIFER.—Surficial outwash sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 23 ft (7.0 m), screened 21 to 23 ft (6.4 to 7.0 m). DATUM.—Altitude of land-surface datum is 895 ft (273 m). Measuring point: Top of casing, 3-75 ft (1.14 m) above land-surface datum. PERIOD OF RECORD.—August 1974 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 3.47 ft (1.06 m) below land-surface datum, May 4, 1982; lowest,-8.60 ft (2.62 m) below land-surface datum, Oct. 26, 1977.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 5.77 JAN 7 5.83 MAR 4 5.88 APR 2 5.15 MAY 4 3.47 SEP 10 5.95

444616093020101. Local number, 115N18W18BCB01. LOCATION.—Lat 44°46'l6", long 93°02'01", in NW4SW4NW4 sec.18, T.115 N., R.18 W., Hydrologic Unit 07010206, southwest corner of Pine Bend Cemetery. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 189 ft (57.6 m), screened 187 to 189 ft (57.0 to 57.6 m). DATUM.—Altitude of land-surface datum is 930 ft (283 m). Measuring point: Top of casing, 3.80 ft (1.16 m) above land-surface datum. PERIOD OF RECORD.—May and June 1973, January 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, l6?.3 ft (50.99 m) below land-surface datum, Mar. 31, 1973; lowest, 178.9 ft (54.53 m) below land-surface datum, May 6, 1982.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 178.7 JAN 11 178.3 MAR 5 178.4 MAY 6 178.9 SEP 13 178.2 362 GROUND-WATER LEVELS

DODGE COUNTY

435336092553201. Local number, 105N18W13DDD01. LOCATION.—Lat 43°53'36", long 92°55'32", in SE4SE4SE4 sec.13, T.105 N., R.18 W., Hydrologic Unit 07080201, 3 mi (4.8 km) west of Hayfield. Owner: James Barry. AQUIFER.—Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 5 in (0.13 m), depth 82 ft (25.0 ra), screen information not available. DATUM.—Altitude of land-surface datum is 1,288 ft (393 m). Measuring point: Top of casing, 1.80 ft (0.55 m) above land-surface datum. PERIOD OF RECORD.—June 1975 to current year. EXTREMES TOR PERIOD OF RECORD.—Highest water level, 40.70 ft (12.41 m) below land-surface datum, July 11, 1975; lowest, 46.25 ft (14.10 m) below land-surface datum, Mar. 30, 1978.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVRL NOV 5 41.21 FEB 1 41.78 MAR 12 41.62 MAR 22 41.99 MAY 12 41.07 AUG 23 41.33 DEC 17 41.58

440448092485501. Local number, 107N17W13BBA01. LOCATION.—Lat >44°04'48", long 92°48'55", in NE4NW4NW4 sec.13, T.107 N., R.17 W., Hydrologic Unit 07040004, in City of Wasioja. Owner: Wasioja Township Garage. AQUIFER.—Galena Formation of Middle Ordovlclan Age. WELL CHARACTERISTICS.—Drilled maintenance artesian well, diameter 6 in (0.15 m), depth 100 ft (30.5 m), cased to 52 ft (15.8 m). DATUM.—Altitude of land-surface datum is 1,185 ft (361 in). Measuring point: Top of casing, 1.60 ft (0.49 m) above land-surface datum. PERIOD OF RECORD.—January 1975 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 17.97 ft (5.48 m) below land-surface datum, July 11, 1975; lowest, 26.88 ft (8.19 m) below land-surface datum, Jan. 5, 1978.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

NOV 5 22.79 DEC 17 23.37 MAR 12 24.35 MAY 12 20.67 AUG 23 21.04

12 I I 1 4

16

18

20

22

24

26 —

28 —

30 —

32 1973 1974 1975 1976 1977 1978 1979 1980 1981J1982

107N17W13BBA01 363 GROUND-WATER LEVELS

DOUGLAS COUNTY

'454643095413201. Local number, 127N40W27CBB01. LOCATION.—Lat 45°46'43", long 95°J41'32", in NWiNWJSWJ sec.27, T.127 N., R.40 W., Hydrologic Unit 07020005, at Kensington. Owner: City of Kensington. AQUIFER.--Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 10 in (0.25 m), depth 259 ft (78.9 m), screened 251 to 2bl ft (76.5 to 79-6 m). DATUM.—Altitude of land-surface datum is 1,332 ft (406 m). Measuring point: Top of casing, 2.10 ft (0.64 m) above land-surface datum. PERIOD OP rtECORD.—larch 1964 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 79.95 ft (24.37 m) below land-surface datum, Oct. 2, 1972; lowest, 83.17 ft (25.35 m) below land-surface datum, Apr. 5, 1977.

WATER LEVEL, IN FSET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 198! TO SEPTEMBER 1982 WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL MAR 30 80.15 JUN 30 80.22 SEP 7 80.26

455926095122901. LOCAL NUMBER, 129N36W15BB801. LOCATION.—Lat 45°59'26", long 95°12'29", in 1MW4NW4NW4 sec.15, T.129 N., R.36 W., Hydrologic Unit 07010108, 1 mi (1.6 km) east of 3elle River. Owner: George Schunetnan. AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused water-table well, depth 18 ft (5-5 m). DATUM.--Altitude of land-surface datum is 1,345 ft (410 tn). Measuring point: Top of casing, 1.00 ft (0.30 m) above land-surface datum. PERIOD OF RECORD.--February 1972 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 2.98 ft (0.91 m) below land-surface datum, June 30, 1979; lowest, 8.40 ft (2.56 m) below land-surface datum, Feb. 28, 1977-

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 31 6.04 JAN 31 6.63 MAR 31 5-69 APR 30 4.85 JUN 30 5-35 AUG 31 6.09 NOV 30 6.20 FEE 28 6.78 APR 23 4.54 MAY 31 4.96 JUL 31 5.54 SEP 30 5.98 DEC 31 6.43

455900095162001. Local number, 129N36W18CBB01. LOCATION.—Lat 45°59'00", long 95°l6'20", in NWJNirfJSWJ sec.18, T.129 N., R.36 W., Hydrologic Unit 07010108, 1.5 mi (2.4 km) northeast of Carlos. Owner: Ray Beilke. AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 29 ft (8.8 m), screened 27 to 29 ft (8.2 to 8.8 tn). DATUM.—Altitude of land-surface datum is 1,362 ft (415 m). Measuring point: Top of casing, 3.50 ft (1.07 m) above land-surface datum. PERIOD OF RECORD.—January 1973 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 5.90 ft (1.80 m) below land-surface datum, Apr. 30, 1973; lowest, 12.00 ft (3.66 tn) below land-surface datum, Jan. 31, 1977.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE- LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 31 9.19 DEC 31 9.45 APR 30 7.60 JUN 30 7.93 AUG 31 9.09 SEP 30 8.78 NOV 30 9-23 APR 23 7.48 MAY 31 7.75 JUL 31 7.84 364 GROUND-WATER LEVELS

DOUGLAS COUNTY--Coritinued

J____I 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

129N36W18CBB01

460604095134401. Local number, 130N36W04BCC01. LOCATION.—Lat 46°06'04", long 95°13'44", in SWftSWftNWft sec.4, T.130 N., R.36 W., Hydrologlc Unit 07010108, northwest of Rose City. Owner: U.S. Geological Survey. AQUIFER.—Surflcial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1ft in (0.03 m), depth 17 ft (5.2 ra), screened 15 to 17 ft (4.6 to 5.2 m). DATUM.—Altitude of land-surface datum is 1,417 ft (432 m). Measuring point: Top of casing, 3.40 ft (1.04 ra) above land-surface datum. PERIOD OP RECORD.—January 1973 to current year. EXTREMES TOR PERIOD OP RECORD.—Highest water level, 2.72 ft (0.83 m) below land-surface datum, June 30, 1979; lowest, 8.05 ft (2.45 m) below land-surface datum, Feb. 28, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCX 31 3.88 DEC 31 4.37 FEB 28 4.61 APR 30 2.97 JUN 30 3-33 AUG 31 2.73 NOV 30 4.07 JAN 31 4.52 MAR 31 3.64 MAY 31 3.12 JUL 31 3.43 SEP 30 3.47

460300095100201. Local number, 130N36W23DDD01. LOCATION.—Lat 46°03'00", long 95°10'02", in SEftSEftSEft sec.23, T.130 N., R.36 W., tfydrologic Unit 07010108, 1 mi (1.6 km) south of Rose City. | Owner: U.S. Geological Survey. AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1ft in (0.03 ra), depth 14 ft (4.3 m), screened 12 to 14 ft (3.7 to 4.3 m). DATUM.—Altitude of land-surface datum is 1,405 ft (428 m). Measuring point: Top of casing, 2.00 ft (0.61 m) above land-surface datum. PERIOD OF RECORD.—April 1972 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 4.77 ft (1.45 m) below land-surface datum, June 30, 1979; lowest, 12.90 ft (3-93 m) below land-surface datum, Feb. 28, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 31 8.34 JAN 31 8.87 MAR 31 7.01 APR 30 7.02 JUN 30 7.31 AUG 31 8.11 NOV 30 8.54 FEB 28 9.03 APR 23 6.92 MAY 31 6.96 JUL 31 7.52 SEP 30 8.28 DEC 31 8.71 365 QROUND-WATER LEVELS

PARIBAULT COUNTY

434237094082901. Local number, 103N28W24BDC01. LOCATION.—Lat 43°42'37", long 9'4°08'29", in SWJSE4NW4 sec.24, T.103 N., R.28 W., Hydrologic Unit 07020009, 4.5 mi (7.2 km) south of Winnebago. Owner: Riverside Town and Country Club. AQUIFER.—Prairie du Chien Group of Early Ordovlcian Age. WELL CHARACTERISTICS.—Drillel irrigation artesian well, diameter 8 in (0.20 m), depth 352 ft (107 m), cased to 291 ft (88.7 m). DATUM.—Altitude of land-surface datum is 1,085 ft (331 m). Measuring point: Top of coupling, 1.50 ft (0.46 m) above land-surface datum. PERIOD OP RECORD.—July 1979, April 1980, May 1981 to current year. EXTREMES FOR PERIOD OF RECORD.--Highest water level, 36.87 ft (11.24 m) below land-surface datum, May 18, 1982; lowest, 39.30 ft (11.98 m) below land-surface datum, July 31, 1979.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1961 TO SEPTEMBER 1982

WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

NOV 10 37.82 MAR 10 37.45 MAY 18 36.87 SEP 16 37.80

434558093540001. Local number, 104N26W36CAC01. LOCATION.—Lat 43°45'58", long 93°54'00", in SW4NE4SW4 sec.36, T.104 N., R.26 W., Hydrologic Unit 07020011, at Easton Creamery. Owner: City of Easton. AQUIFER.—Platteville Formation of Middle Ordovician Age. WELL CHARACTERISTICS.—Drilled public supply artesian well, diameter 6 in (0.15 m), depth 145 ft (44.2 m), cased to 120 ft (36.6 m). DATUM.—Altitude of land-surface datum is 1,060 ft (323 m). Measuring point: Top of well cap, 1.20 ft (0.37 m) above land-surface datum. PERIOD OF RECORD.—August 1979, April 1980, May 1981 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 30.93 ft (9.43 m) below land-surface datum, May 18, 1982; lowest, 35.25 ft (10.74 m) below land-surface datum, Aug. 1, 1979.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL . DATE LEVEL

NOV 10 32.77 MAR 10 32.96 MAY 18 30.93 SEP 16 32.72 ^ bo GROUND-WATER LEVELS

FARIBAULT COUNTY—Continued

434902094042901. Local number, 104M27W16ABA01. LOCATION.—Lat 43°49'02", long 94°04'29", in NEJNWJNEJ sec.l6, T.104 N., R.27 W., Hydrologic Unit 07020011, at Bass Lake. Owner: Baptist Camp. AQUIFER.—St. Peter Sandstone of Middle Ordovician Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 4 in (0.10 m), depth 240 ft (73-2 m), cased to 190 ft (57.9 m). DATUM.—Altitude of land-surface datum is 1,050 ft (320 m). Measuring point: Hole in well cap, 0.90 ft (0.27 m) above land-surface datum. PERIOD OP RECORD.—September 1981 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 28.98 ft (8.83 m) below land-surface datum, May 18, 1982; lowest, 29.62 ft (9.03 m) below land-surface datum, Sept. 15, 1981.

WATER LEVEL, IN FEET BELOW LUND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 10 29.52 MAR 10 29.34 MAY 18 28.98 SEP 16 29.50

FREEBORM COUNTY

433434093331201. Local number, 101N23W02DAC01. LOCATION.—Lat 43°34'34", long 93°33'12", in SWJNEJSEJ sec.2, T.101 N., R.23 W., Hydrologic Unit 07080203, 3 mi (4.8 km) southwest of Conger. Owner1 : Richard Steele. AQUIFER.—Upper Carbonates of Devonian and Ordovician Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 16 in (0.41 m), depth 373 ft (114 m), cased to 156 ft (47.6 m). DATUM.—Altitude of land-surface datum is 1,280 ft (390 m). Measuring point: Vent pipe, 1.50 ft (0.46 m) above land-surface datum. PERIOD OF RECORD.—July 1981 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 67.40 ft (20.54 m) below land-surface datum, May 18, 1982; lowest, 68.90 ft (21.00 m) below land-surface datum, July 8, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER , WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 10 68.42 MAR 10 68.12 MAY 18 67-40 SEP 16 68.39

433846093220601. Local number, 102N21W09CCB01. LOCATION.—Lat 43°38'46", long 93°22'06", in MWiSWJSWJ sec.9, T.102 N., R.21 W., Hydrologic Unit 07080202, at Freeborn County Courthouse. Owner: Freeborn County. AQUIFER.--Cedar Valley Formation of Middle Devonian Age. WELL CHARACTERISTICS.—Drilled public supply artesian well, diameter 5 in (0.13 m)', depth 150 ft (45.7 m), cased to 138 ft (42.1 m). DATUM.—Altitude of land-surface datum is 1,240 ft (378 m). Measuring point: Top of casing, 1.00 ft (0.30 m) above land-surface datum. PERIOD OF RECORD.—November 1981 to September 1982. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 42.24 ft (12.87 m) below land-surface datum, Jan. 14, 1982; lowest, 44.32 ft (13-51 m) below land-surface datum, Sept. 16, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER - WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 10 43.04 JAN 14 42.24 MAR 10 42.83 MAY 18 42.98 SEP 16 44.32 367

FREEBORN COUNTY—Continued

'434032093111801. Local number, 103N20W36CCBO 1. LOCATION.—Lat 43°40'32", long 93°ll'l8", in NW4SW4SW4 sec.36, T.103 N., R.20 W., Hydrologic Unit 07080201, at Pillsbary Grain Station. Owner: Pill.Voury Co. AQUIFER.—'Jedar Valley Formation of Middle Devonian Ago. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 5 in (0.13 n), depth 231 ft (70.4 m), cased to 136 ft (41.4 m). DATUM.— Altitude of land-surf ice datarn is 1,255 ft (383 m). Measuring point: Top of casing, 1.80 ft (0.55 m) above land-surface datum. PERIOD OP RiiGORD.— July 1981 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 49.70 ft (15.15 m) below land-surface datum, May 18, 1982; lowest, 51.40 ft (15.67 m) below land-surface datum, July 8, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURPACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL MOV 10 50.92 MAR 10 51.02 MAY 18 49.70 SEP 16 50.94

434308093322001. Local number, 103N23W13CDAO1. LOCATION.—Lat 43°43'08", long 93°32'20", in NE43E4SW4 sec.13, T.103 N., R.23 W., Hydrologic Unit 07020011, 3-3 mi (5.3 km) northeast of Alden. Owner: Oakview Golf Course. AQUIFER.—Galena Formation of Middle Ordovician Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 6 in (0.15 m), deptn 270 ft (82.3 m), cased to 158 ft (48.2 m). DATUM.—Altitude of land-surface datum is 1,250 ft (381 m). Measuring point: Hole in well cap, 1.90 ft (0.58 m) above land-surface datum. PERIOD OF RECORD.—July 1981 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 43.53 ft (13.27 m) below land-surface datuti, May 18, 1932; lowest, 45.77 ft (13.95 m) below land-surface datum, Nov. 10, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 10 45.77 MAR 10 44.00 MAY 18 43.53 SEP 16 44.83

GOODHUE COUNTY

441737092400501. Local number, 110N15W31BBD01. LOCATION.—Lat 44°17'37", long 92°40'05", in SE4MW4NW4 sec.31, T.110 M., R.15 W., Hydrologic Unit 07040004, at Zumbrota Fire Station. Owner: City of Zumbrota, well 3. AQUIFER.—Prairie du Chien Group of Early Ordovician Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 12 in (0.30 m), depth 210 ft (64.0 -n), cased to 50 ft (15.2 m). DATUM.—Altitude of land-surface datum is 1,000 ft (305 m). Measuring point: Hole in pump base, 2.20 ft (0.67 m) above land-surface datum. PERIOD OF RECORD.—June 1973 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 20.07 ft (6.12 m) below land-surface datura, July 11, 1975; lowest, 27.07 ft (8.23 m) below land-surface datum, Jan. 5, 1978.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATS LEVEL DATE LEVEL NOV 7 23.77 FEB 1 24.94 MAR 12 25.32 MAY 12 22.74 AUG 25 23-92 SEP 21 24.13 DEC 16 24.89 368 JROUND-WATER LEVELS

GOODHUE COUNTY—Continued

442401092372501. Local number, 111N15W21CDA01 . LOCATION.— Lat 44°24'01", long 92°37'25", in sec. 21, T.lll N., R.15 W., Hydrologic Unit 07040004, in Goodhue clerk's office. Owner: City of Goodhue, creamery well, AQUIFER. — Prairie du Chien Group of Early Ordovician Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS. — Drilled public-supply artesian well, diameter 12 in (0.30 m), depth 310 ft (94.5 m) , cased to 175 ft (53.3 m). DATUM. — Altitude of land-surface datum is 1,125 ft (343 m). Measuring point: Top of 14 in (0.03 m) elbow, 1.50 ft (0.46 m) above land-surface datum. PERIOD OP RECORD. — June 1973 to current year. EXTREMES FOR PERIOD OP RECORD.— Highest *ater level, 124.4 ft C37-92 m) below land-surface datum, Aug. 23, 1974; lowest, 144,2 ft (43-95 m) below land-surface datum, Aug. 25, 1982.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER rfATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 7 137-6 DEC 16 137-3 PEB i MAR 12 137.9 MAY 12 137.4 AUG 25 144.2

443012092362201. Local number, 113N15W27BAB01. LOCATION.—Lat 44°30'12", long 92°36'22", in NWJNE4NW4 sec.27, T.113 N., R.15 W., Hydrologic Unit 07040002, at Red Wing. Owner: City of Red Wing, Anderson Park. AQUIFER.--Eau Claire-Mount Simon Sandstones of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 12 in (0.30 m), depth 684 ft (208 m), cased to 243 ft (74.1 m). DATUM.—Altitude of land-surface datum is 800 ft (244 m). Measuring point: Edge of casing, 2.70 ft (0.82 m) above land-surface datum. PERIOD OP RECORD.—April 1976, June 1978 to current year. EXTREMES FOR PERIOD OF RECORD.--Highest water level, 102.4 ft (31.21 m) below land-surface datum, Mar. 12, 1982- lowest, 108.2 ft (32.98 m) below land-surface datum, Sept. 14, 1978.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 7 104.2 DEC 16 103-6 FEB 1 103.0 MAR 12 102.4 MAY 12 102.4 AUG 25 104.5

100

101

102

103

104

105

106

107

108

109

1 10 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

113N15W27BAB01 GROUND-WATER LEVELS 369

GRANT COUNTY

455010095523701. Local lumber, 127N41W06CAC01. LOCATION.—Lat 45°50'10", long 95 O 52'37", in SWJNEJSWi sec.6, T.127 N., R.41 W., Hydrologic Unit 07020002. Owner: Lee Hedstrom. AQUIFER.—Burled sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in (0.30 m), depth 70 ft (21.3 m), screened 50 to 70 ft (15-2 to 21.3 m). DATUM.—Altitude of land-surface datum is 1,175 ft (358 m). Measuring point: Top of casing, 1.20 ft (0.37 m) above land-surface datum. PEHIOO OP RECORD.—May 1977 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 35.30 ft (10.76 m) below land-surface datum, May 31, 1978; lowest, 39.80 ft (12.13 m) below land-surface datum, May 26, June 22, July 6, 19, Aug. 19, 1977-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 22 36.43 MAY 28 36.55 JUN 29 36.43 JU1 2 36.39 AUG 25 36.44 SEP 30 36.44 NOV 17 36.34 JUN 4 36.46

454624095513201. Local number, 127N41W32BBA01. LOCATION.—Lat 45°46'24", long 95°51'32", in NEJNWJNWJ sec.32, T.127 N., R.41 W., Hydrologic Unit 07020002. Owner: Charles Musser. AQUIFER.—Surficial gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored irrigation water-table well, diameter 16 in (0.41 m), depth 44 ft (13-4 m), screened 12 to 44 ft (3.7 to 13.4 m). DATUM.—Altitude of land-surface datum is 1,129 ft (344 m). Measuring point: Top of casing, 0.90 ft (0.27 m) above land-surface datum. PERIOD OF RECORD.—May 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 3.10 ft (0.94 m) below land-surface datum, May 31, 1978; lowest, 8.10 ft (2.47 m) below land-surface datum, Sept. 6, 1978.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 22 6.16 MAY 28 6.32 JUN 29 6.33 JUL 2 6.26 AUG 25 6.28 SEP 30 6.24 NOV 17 6.27 JUN 4 6.35

455641095524001. Local number, 129N41W31ACA01. LOCATION.—Lat 45°56'4l", long 95°52'40", in NE&SWJNE4 sec.31, T.129 N., R.41 W., Hydrologic Unit 07020002. Owner: Paul Sanford. AQUIFER.—Surficial gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored irrigation water-table well, diameter 16 in (0.41 m), depth 51 ft (15.5 m), screened 15 to 51 ft (4.6 to 15-5 m). DATUM.—Altitude of land-surface datum is 1,165 ft (355 m). Measuring point: Top of casing, 0.80 ft (0.24 m) above land-surface datum. PERIOD OF RECORD.—July 1979 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 13.10 ft (3-99 m) below land-surface datum, Aug. 25, 1982; lowest, 14.20 ft (4.33 m) below land-surface datum, Sept. 25, 1979 to Nov. 4, 1980.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 22 13.56 MAY 28 13.92 JUN 29 13.63 JUL 2 13.17 AUG 25 13.10 SEP 30 13.11 NOV 17 13.48 JUN 4 13.95 GROUND-WATER LEVELS

GRANT COUNTY--Continued

460316095551301. Local number, 130N42W23DBDO1. LOCATION.—Lat 46°03'l6" 3 long 95°55'13", in SE4M4SE4 sec.23, T.130 N., R.42 W., Hydrologic Unit 07020002. Owner: George Haberer. AQUIFER.—Buried gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in (0.30 m), depth 52 ft (15.8 m), screened 32 to 52 ft (9-8 to 15.3 m). DATUM.—Altitude of land-surface datum is 1,189 ft (362 m). Measuring point: Top of plastic pipe, 0.65 ft (0.20 m) above land-surface datum. PERIOD OP RECORD.—May 1977 to current year. EXTREMES TOR PERIOD OP RECORD.—Highest water level, 11.35 ft (3.46 m) below land-surface datura, July 31, 1979; lowest, 15.35 ft (4.68 m) below land-surface datum, Aug. 23, 1978, Sept. 10, 1980.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

OCT 22 12.32 MAY 28 12.23 JUN 29 12.21 JUL 2 12.24 AUG 25 12.27 SEP 30 12.25 NOV 17 12.21 JUN 4 12.26

460123095545102. Local number, 130N42W36CCC02. LOCATION.—Lat 46°01'23", long 95°54'51", in SW4SW4SW4 sec.36, T.130 N., R.42W., Hydrologic Unit 07020002. Owner: William Nelson. AQUIFER.—Surficial gravel of Pleistocene Age. WELL CHARACTERISTICS.—Driven observation water-table well, diameter 14 in (0.03 m), depth 15 ft (4.6 m), screened 13 to 15 ft (4.0 to 4.6 m). DATUM.—Altitude of land-surface datum is 1,186 ft (361 m). Measuring point: Top of casing, 1.05 ft (0.32 m) above land-surface datum. PERIOD OF RECORD.—August 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 2.00 ft (0.61 m) below land-surface datum, July 31, 1979; lowest, 8.50 ft (2.59 m) below land-surface datum, Aug. 2, 1977-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 22 6.30 NOV 17 6.28 MAY 28 6.31 JUN 4 6.24 JUN 29 6.25 JUL 6.26

HENNEPIM COUNTY

444815093194901. Local number, 027N24W30AAA01. LOCATION.—Lat 44°48'15", long 93°19'49", in NE4NEJNE4 sec.30, T.27 N., R.24 W., Hydrologic Unit 07020012, at 4001 West 110th Street, Bloomington. Owner: Transfiguration Church. AQUIFER.—Burled Sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 4 in (0.10 m), depth 139 ft (42.4 m), screened 135 to 139 ft (41.2 to 42.4 m). DATUM.—Altitude of land-surface datum is 832 ft (254 m). Measuring point: Top of casing, 0.50 ft (0.15 m) above land-surface datum. PERIOD OF RECORD.—March 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 63.97 ft (19.50 m) below land-surface datum, Mar. 2, 1979; lowest, 69.64 ft (21.23 m) below land-surface datum, Sept. 10, 1982.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 68.87 JAN 5 APR 2 1.72 MAY 5 69.02 SEP 10 69.64 371

HENNEPIN COUNTY--Continued

444301093202801. Local number, 027N24W30SD401. LOCATION.—Lat 44°48'01", long 93°20'28", in NE4SE&NW4 sec.30, T.27 N., R.24 W., Hydrologio Unit 07020012, in Bloonington. Owner: City of 31oornington, at Southwood Terrace. AQUIFER.—Jordan Sandstone of Late Can^rian Age. WZLL CHARACTERISTICS.—Drilled unused artesian well, diameter 12 in (0.30 m), depth 330 ft (101 m), cased to 269 ft (82.0 m). DATUM. — Altitude of land-surface datum is 815 ft (248 m). Measuring point: Top of recorder platform, 2.20 ft (0.6? m) above land-surface datum. PERIOD OP RECORD.—March 1969 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest /^ater le

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YE^R OCTOBER 193l TO SSPTfCM3EH 1982 LOWEST VALUES

DAY OCT MOV DEC JAN FEB vlAR APR MAY JUN JUL ADO

5 76.58 76.57 76.76 76.86 76.77 76.90 76.25 78.44 79.69 83.24 10 17.33 76.51 76.84 77.05 76.70 76.71 75.91 77.07 79.48 77.66 15 77.76 76.51 76.80 • 76.88 76.77 76.79 75.85 76.35 81.99 78.24 20 7-6.70 76.59 76.83 77.04 76.80 76.47 77.60 77.38 81.57 78.62 25 76.57 76.52 76.93 76.86 77.07 76.47 75-91 78.74 79.78 77.82 EOM 77. 4 3 76.51 76.85 76.91 76.79 76.38 78.70 76.37 80.94 78.23 WTR YEAR 1982 HIGHEST 75.49 APR 12, 1982 LOWEST 83.24 JUL 5-6, 1982

1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

027N24W30BDA01

445356093145301. Local number, 028N24W23ADD01. LOCATION.—Lat 44°53'56", long 93°1V53", in SEJSEJNE* sec.23, T.28 N., R.24 W., Hydrologic Unit 07010206, at 5728 Cedar Avenue, Minneapolis. Owner: Hope Lutheran Church. AQUIFER.—Prairie du Chien Group of Early Ordovician Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 6 in (0.15 m), depth 245 ft (74.7 m), cased to 172 ft (52.4 m). DATUM.—Altitude of land-surface datum is 835 ft (254 m). Measuring point: Top of casing, 0.30 ft (0.09 m) above land-surface datum. PERIOD OF RECORD.—April 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 37.42 ft (11.41 m) below land-surface datum, Jan. 23, 1980; lowest, 47.30 ft (14.42 m) below land-surface datum, July 20, 1981.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 39. * JAN 11 39-20 MAR 2 39.10 MAY 11 41.16 SEP 7 44.03 372 GROUND-WATER LEVELS

HENNEPIN COUNTY—Continued

450116093205301. Local number, 029N24W06CCC01. LOCATIJEJ.—Lat 45°01'l6", long 93°20'53", in SWJSW4SW4 sec.6, T.29 N., R.24 W., Hydrologic Unit 07010206, at 3610 Unity Avenue North, Robbinsdale. Owner: Minnesota Department of Transportation. AQUIFER.--St. Peter Sandstone of Middle Ordovician Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 5 in (0.13 m), depth 200 ft (61.0 m), cased to 152 ft (46.3 m). DATUM.—Altitude of land-surface datum is 870 ft (265 m). Measuring point: Top of casing, 3-50 ft (1.07 m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OP RECORD.--March 1973 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 24.54 ft (7-48 m) below land-surface datum, Dec. 28-29, 1975; lowest, 50.11 ft (15.27 m) below land-surface datum, July 14, 1976.

WATER LEVEL, IN PEEi1 BELOW L/UMD-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 LOWEST VALUES DAY OCT MOV DEC JAM PEB ?1AR APR MAY JUN JUL AUG SEP

5 33-45 33.09 31.45 31.31 31.98 36.72 38.77 43.55 48.50 35.38 10 34.06 32.37 3l.«9 32.69 31.37 34.82 42.43 43.19 46.13 36.20 15 34.46 32.08 31.58 32.63 ..... 32.54 32.58 36.53 40.96 41.88 43.19 34.29 20 33.67 32.15 30.94 32.54 ..... 32.89 32.02 38.35 39.98 44.61 45.16 32.99' 25 32.19 32.25 31.02 ..... 32.56 31.38 38.27 41.68 44.00 39.63 34.13 EOM 33-62 31.94 32.15 ..... 32.77 34.99 32.34 40.11 44.08 36.70 34.89 WTR YEAR 1982 HIGHEST 28.64 APR 12, 1982 LOWEST 49.04 JUL 23, 1982

445849093155802. Local 'number, 029N24W23CCB02. LOCATION.—Lat 44°58'49", Ions 93°15'58", in NW4SW4SW4 sec.23, T.29 N., R.24 W., Hydrologic Unit 07010206, at 245 Marquette Avenue, Minneapolis. Owner: IBM Corporation. AQUIFER.—Prairie du Chien Group of Early Ordovician Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 10 in (0.25 m), depth 430 ft (131 m), cased to 250 ft (76.2 m). DATUM.—Altitude of land-surface datum is 840 ft (256 m). Measuring point: Edge of 2 in (0.05 m) vent pipe, 9.60 ft (2.93 m) below land-surface datum. REMARKS.—Water level affected by pumping of nearby wells. PERIOD OF RECORD.—July 1970 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 76.30 ft (23.26 m) below land-surface datum, Jan. 31, 1979; lowest, 179.6 ft (54.74 m) below land-surface datum, Aug. 16, 1972.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATS LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 28 86.40 JAN 5 77.15 MAR 2 78.80 APR 28 82.45 MAY 24 107.9 SEP 16 96.80 NOV 26 79.75

445833093154301. Local number, 029N24W26BAB01. LOCATION.--Lat 44°58'33", long 93°15'43", in NWJNEJNWJ sec.26, T.29 N., R.24 W., Hydrologic Unit 07010206, at 425 Portland Ave. Owner: Minneapolis Star and Tribune. AQUIFER.—Prairie du Chien Group of Early Ordovician Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 16 in (0.41 m), depth 445 ft (136 m), cased to 252 ft (76.8 m). DATUM.—Altitude of land-surface datum is 835 ft (254 ra). Measuring point: Top of steel cover, 7.60 ft (7.90 m) below land-surface datum. REMARKS.—Water-level affected by pumping. PERIOD OF RECORD.—June 1981 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 61.13 ft (18.63 m) below land^surface datum, Jan. 13, 1982; lowest, 145.2 ft (44.26 m) below land-surface datum, July 22, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 LOWEST VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 5 92.79 85.40 70.71 69-74 72.40 74.24 ..... 109-5 91.81 10 81.37 79.19 73.07 64.62 72.34 70.29 ..... 95.59 115.0 104.6 15 86.72 71.33 72.71 73.49 68.95 122.4 141.6 20 85.46 75.19 66.00 73.05 69-31 77.65 141.9 ..... 84.04 25 68.72 74.56 64.64 71.43 ..... 109.1 123.1 96.87 ..... 81.63 EOM 78.27 69.45 69.56 64.98 64.35 ..... 70.30 124.9 113.9 ..... 109.6 WTR YEAR 1982 HIGHEST 61.13 JAN 13, 1982 LOWEST 145.2 JUL 22, 1982 373 GROUND-WATER LEVELS

HENNEPIfJ COUNTY--Contlnued

445829093162901. Local number, 029N24W27ABD01. LOCATION.—Lat 44°53'29", long 93°l6'29", In SE4NW4NS4 sec. 27, T.29 N., R.2'4 W., Hydrologic Unit 07010206, at 911 LaSalle Avenue, Minneapolis. Owner: American Linen Supply Go. AQUIFER.—Mount Simon Sandstone of Late Cambrian Age and Hinckley Sandstone of Late Precambrian Age. rfELL CHARACTERISTICS.—Drilled unused artesian well, diameter 16 in (0.41 m), depth 1,094 ft (333 m), cased to 812 ft (248 m). DATUM.—Altitude of land-surface datum is 850 ft (259 m). Measuring point: Hole in pump base, 22.00 ft (6.71 m) below land-surface datum. REMARKS.—Water level affected by regional pumping. PERIOD OP RECORD.—July 1970 to current year. EXTREMES TOR PERIOD OP RECORD.—Highest water level, 169.8 ft (51.76 m) below land-surface datum, Apr. 15, 19^0; lowest, 235.1 ft (71.66 m) below land-surface datum, Oct. 6, 1970.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1932 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATS LEVEL DATE LEVEL GOT 28 202.5 JAM 5 195.2 MAR 2 194.2 APR 28 193.0 MAY 24 193.8 SUP 16 213.6 NOV 26 198.4

445158093225101. Local number, 116N21W07DAD01. LOCATION.—Lat 44°51'58", long 93°22'51", in SE4NE43E4 sec.7, T.llb N., R.21 W., Hydrologic Unit 07020012, at Braemer Golf Course. Owner: City of Edina, well 14. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled public-supply artesian well, diameter 16 in (0.41 m), depth 420 ft (1283 m), cased to 325 ft (99.1 m). DATUM.—Altitude of land-surface datum is 848 ft (258 m). Measuring point: Vent pipe at land-surface datum. PERIOD OF RECORD.--April 1965 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water levrel, 31.26 ft (9.53 m) below land-surface datum, Apr. 4, 1966; lowest, 63.20 ft (19.26 m) below land-surface datum, July 21, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 2 47.98 JAN 11 48.67 MAR 2 47-85 MAY 6 51-36 SEP 10 50.90

445615093212301. Local number, 117N21W16CCA01. LOCATION.—Lat 44°56'15", long 93°21'23", in NE4SW4SW4 sec.l6, T.117 N., R.21 W., Hydrologic Unit 07010206, at 6021 36th Street West by water tower. Owner: City of St. Louis Park, old well 1. AQUIFER.—Prairie du Chien Group of Early Ordovician Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 16 in (0.41 m), depth 421 ft (128 m), cased to 280 ft (85.3 m). DATUM.—Land-surface datum is 917-4 ft (279.6 m), revised, National Geodetic Vertical Datum of 1929- Measuring point: Top of well cover, 0.70 ft (0.21 m) above land-surface datum. REMARKS.—Water level affected by pumping of nearby wells. PERIOD OF RECORD.--February 1953 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 66.0 ft (20.11 m) below land-surface datum, Mar. 23, 1953; lowest, 110.5 ft (33.68 m) below land-surface datum, July 31, 1959-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 LOWEST VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

10 84.15 82.27 82.11 81.52 82.24 81.94 80.27 Q£- ,Rfi 91 .96 ...... 15 Q r- -3 /: 80.90 83-34 Q -1 ho Q -1 <-j ••} Q r. -69 96 .39 ...... 20 Q-2 *} O Q A Q c 81.60 81.14 Q rj .73 93 .09 ...... Q 1 25 80.96 81.82 80.09 81.39 82.48 82.22 .56 95 .55 ...... EOM 82.40 80.63 81.61 81.26 80. S6 83.31 86.51 8fi .86 <35 .26 ..... 89.04 ..... WTR YEAR 1982 HIGHEST 78.31 JAN 3, 1982 LOWEST 99-89 JUL 6, 1982 374

HENNEPIN COUNTY--Continued

445618093211801. Local number, 117N21W16CDB01. LOCATION.—Lat 44°56'l8", long 93°21'l8", in NWiSEJSWJ sec.l6, T.117 N., R.21 W., Hydrologic Unit 07010206, at 2565 Wooddale Avenue South, St. Louis Park. Owner: 0-A Lubricant Co. AQUIP2R.—Ironton-Galesville Sandstones of Late Cambrian Age. WELL CHARACTEKISTICS.—Drilled observation artesian well, diameter 4 in (0.10 m), depth 691 ft (211 m), screened 651 to 661 ft (198 to 202 m). DATUM.—Altitude of land-surface datum is 917.2 ft (279.6 m), National Geodetic Vertical Datum of 1929. Measuring point: Hole in well seal, 3.60 ft (1.10 m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OP RECORD.--April 1980 to current year. EXTREMES TOR PERIOD OP RECORD.—Highest water level, 131.8 ft (40.17 m) below land-surface datum, Apr. 16, 1982; lowest, 146.7 ft (44.71 m) below land-surface datum, Aug. 31, 1982.

WATEK LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

OCT 3 144.0 DEC 1 137.2 PEB 2 133.6 MAR 3 132.6 APR 28 132.2 JliL 29 142.0 14 142.0 9 137.2 4 133.7 12 131.8 MAY ^ 132.4 Mil 11 144.8 23 141.5 18 136.6 5 133.6 19 132.2 20 133.6 27 146.6 26 141.0 23 135.8 15 132.8 31 132.1 JUN 4 134.7 31 146.7 NOV 2 140.4 JAM 5 134.8 25 133.0 APR 9 132.1 11 135.0 SEP 10 146.0 6 139-9 18 133-2 MAR 2 132.6 16 131.8 18 135. H 20 145.6 17 138.8

445347093213901. Local number, 117N21W32DAD01. LOCATION.—Lat 44°53'47", long 93°21'39", in SE4NE4SEJ sec.32, T.117 N., R.21 W., Hydrologic Unit 07010206, at Hanson Road and Benton Avenue. Owner: City of Edina, well 9. AQUIFER.--Hinckley Sandstone of Late Precambrian Age. WELL CHARACTERISTICS.—Drilled public-supply artesian well, diameter 16 in (0.41 m), depth 1,130 ft (344 m), cased to 1,010 ft (308 m). DATUM.—Land-surface datum is 933-3 ft (284.5 m) National Geodetic Vertical Datum of 1929. Measuring point: Hole in east side of pump base, 2.00 ft (0.6l m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OP RECORD.--August 1961 to current year. EXTREMES POR PERIOD OP RECORD.—Highest *ater level, 230.8 ft (70.35 m) below land-surface datum, Apr. 20, 1962; lowest, 369.6 ft (112.6 m) below land-surface datum, Aug. 28, 1970.

WATER LEVEL, IN FEET SELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 2 323.1 JAN 5 317.5 MAR 2 320.6 MAY 11 326.2 SEP 16 337.0

445818093264101. Local number, 117N22W03ADC01. LOCATION.—Lat 44°58'l8", long 93°26'41", in SWJSBiNEJ sec.3, T.117 N., R.22 W., Hydrologic Unit 07010206, at 13106 Wayzata Boulevard. Owner: Standard Oil Co. ; AQUIFER.—Platteville Formation of Middle Ordovician Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 4 in (0.10 m), depth 143 ft (43.6 m), cased to 120 ft (36.6 m). ; DATUM.—Altitude of land-surface datum is 970 ft (296 m). Measuring point: Top of casing, 1.80 ft (0.55 m) above land-surface datum. PERIOD OP RECORD.—April 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 59-94 ft (18.27 m) below land-surface datum, Dec. 5, 1979; lowest, 61.60 ft (18.78 m) below land-surface datum, Mar. 11, 1982.

WATER LEVEL, IN PEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 61.10 JAN 11 61.20 MAR 11 61.60 MAY 5 61.39 SEP 9 61.40 GROUND-WATER LEVELS 375

HENNEPIN COUNTY—Continued

445740093333001. Local number, 117N23W11BBD01. LOCATION.—Lat 44°57'40", long 93°33'30", in SEJNWJNWJ sec.11, T.117 N., R.23 W., Hydrologic Unit 07010206, 2ml (3-2 km) southwest of Wayzata, at Lake Mlnnetonka. Owner: Minnetonka Boat Works, Inc., Orono. AQUIFER.—Prairie du Chlen Group of Early Ordovlclan Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 6 In (0.15 m), depth 437 ft (133 m), cased to 270 ft (82.3 m). DATUM.—Altitude of land-surface datum is 930.8 ft (283.7 m) National Geodetic Vertical Datum of 1929. Measuring point: Wood floor of instrument shelter, 3.30 ft (1.01 m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OP RECORD.—August 1942 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 14.05 ft (4.33 m) below land-surface datum, Apr. 30, 1954; lowest, 34.89 ft (10.63 m) below land-surface datum, July 12, 1980. WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 LOWEST VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

5 28.20 28.21 27.35 27.80 28.01 27-50 29.70 29.96 10 28.36 28.16 27.71 28.24 27.85 27.63 28.16 30.60 28.99 15 28.31 27.73 27.61 28.25 27.84 27.78 27.66 33.35 28.86 20 28.24 27.70 27.46 28.29 27.66 28.02 27.73 33.12 28.71 25 28.22 27.69 27.89 28.15 28.00 28.34 28.18 29.95 EOM 28.41 27.19 27-62 27.75 28.74 28.78 28.72 28.57 WTR YEAR 1982 HIGHEST 26.70 DEC 1, 1981 LOWEST 33.35 JUN 15, 1982

450223093231801. Local number, 118N21W07DCB01. LOCATION.—Lat 45°02'23", long 93°23'l8", in NWJSW4SE* sec.7, T.118 N., R.21 W., Hydrologic Unit 07010206, at 47th Avenue North and Aqulla Avenue. Owner: City of New Hope. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 16 In (0.41 m), depth 422 ft (129 m), cased to 339 ft (103 m). DATUM.—Altitude of land-surface datum Is 933 ft (284 m). Measuring point: Top of wood platform, 3.00 ft (0.91 m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OF RECORD.—October 1965 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 60.46 ft (18.43 m) below land-surface datum, Dec. 17, 1967; lowest, 72.10 ft (21.98 m) below land-surface datum, July 6, 1972. WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 LOWEST VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 5 65.51 65.58 65.55 64.65 65.33 65.35 65 20 66.33 66.41 71.12 66.85 10 66.03 65.44 65.47 65.43 65.03 65.15 64, 86 65.27 66.80 68.66 .29 66.60 15 66.14 65.18 65.03 65.26 64.81 65.13 65 06 66.18 68.14 69.10 .19 66.59 20 65.83 65.51 65.20 65.34 65.12 65.25 65. 31 66.36 67.67 70.03 .35 65.91 25 65.33 65.26 65.00 65.07 65.66 65.58 65, 10 65.88 69.66 70.60 .95 66.40 EOM 65.79 64.59 64.82 65.19 65.16 65.38 65, 84 65.43 70.06 69.20 .76 66.57 WTR YEAR 1982 HIGHEST 64.12 APR 12, 1982 LOWEST 72.10 JUL 6, 1982

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118N21W07DCB01 376 GROUND-WATER LRVELS

HENNEPIN COUNTY—Continued

445905093224401. Local number, 118N21W32CBB01. LOCATION.—Lat 44°59'05", long 93°22'44", in NWJNWJSWJ sec.32, T.118 N., R.21 W., Hydrologic Unit 07010206, at Winnetka Avenue and Highway 55, Golden Valley. Owner: Red Owl Store. AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused water-table well, diameter 6 in (O.l6 m), depth 95 ft (29.0 m), screened 87 to 95 ft (26.5 to 29.0 m). DATUM.—Altitude of land-surface datum is 895 ft (273 m). Measuring point: Top of well cap, 0.80 ft (0.24 m) above land-surface datum. PERIOD OP RECORD.—May 1979 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 19.77 ft (6.03 m) below land-surface datum, Oct. 26, 1979; lowest, 21.05 ft (6.42 m) below land-surface datum, May 5, 1981.

WATER LEVEL, IN FEET agLOW LAMD-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 20.61 JAN 11 20.68 MAR 11 21.00 MAY 5 20.22 SEP 9 20.57

445857093223101. Local number, 118N21W32CBD01. LOCATION.—Lat 44°58'57", lon& 93°22'31", in SE4NWJSW4 sec.32, T.118 N., R.21 W., Hydrologic Unit 07010206, at 760 Harold Avenue, Golden Valley. Owner: Golden Valley Methodist Church. AQUIFER.--St. Peter Sandstone of Middle Ordovician Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 6 in (0.15 tn), depth 265 ft (80.8 m), cased to 200 ft (61.0 m). DATUM.—Altitude of land-surface datum is 890 ft (271 m). Measuring point: Top of well cap, 0.70 ft (0.21 m) above land-surface datum. PERIOD OF RECORD.—February 1971 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 31.44 ft (9-58 m) below land-surface datum, Mar. 9, 1976; lowest, 37-51 ft (11.43 m) below land-surface datum, Aug. 24, 1971.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 33.28 JAN 11 33.13 MAR 11 33.30 MAY 5 33.22 SEP 9 33.

450854093212801. Local number, 119N21W04BBA01. LOCATION.—Lat 45°08'54", long 93°21'28", in NEjNWJNWi sec.4, T.119 N., R.21 W., Hydrologic Unit 07010206, 109th Avenue North, 0.15 mi (0.24 km) east of Zane Avenue North, Brooklyn Park. Owner: Walter Tessman. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled irrigation water-table well, diameter 12 in (0.30 m), depth 80 ft (24.4 m), screened 62 to 80 ft (18.9 to 24.4 m). DATUM.—Altitude of land-surface datum is 876 ft (267 m). Measuring point: Hole in pump base, 1.00 ft (0.30 m) above land-surface datum. PERIOD OP RECORD.—September 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 15.66 ft (4.77 m) below land-surface datum, July 26, 1978; lowest, 19.67 ft (6.00 m) below land-surface datum, Mar. 11, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 18.85 JAN 6 19.20 MAR 11 19.67 MAY 13 18.08 SEP 9 18.48 377 GROUND-WATER LEVELS

HENNEPIN COUNTY--Continued 12

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119N21W04BBA01

450541093225601. Local number, 119N21W19DDD01. LOCATION.—Lat 45°05'4l", long 93°22'56", in SE4SE4SE4 sec.19, T.119 N., R.21 W., Hydrologic Unit 07010206, at 77th Avenue North and Highway 52. Owner: City of Brooklyn Park, Pire Station. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused water-table well, diameter 4 in (0.10 m), depth 47 ft (14.3 m), screen information not available. DATUM.—Altitude of land-surface datum is 880 ft (268 m). Measuring point: Top of well cap, 1.60 ft (0.49 m) above land-surface datum. PERIOD OP RECORD.—March 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 11.98 ft (3.65 m) below land-surface datum, July 26, 1978; lowest, 16.34 ft (4.98 m) below land-surface datum, Mar. 11, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 15.59 JAN 6 15.80 MAR 11 16.34 MAY 13 14.80 SEP 9 15.82

450519093281401. Local number, 119N22W28ACC01. LOCATION.—Lat 45°05'19", long 93°28'l4", in SW4SW4NF4 sec.28, T.119 N., R.22 W., Hydrologic Unit 07010206, at 7349 Mariner Driver, Maple Grove Owner: Cliff Lake. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 4 in (0.10 m), depth 192 ft (58.5 m), cased to 187 ft (57.0 m). DATUM.—Altitude of land-surface datum is 925 ft (288 m). Measuring point: Top of well cap, 1.80 ft (0.55 m) above land-surface datum. PERIOD OF RECORD.—October 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 29.13 ft (8.88 m) below land-surface datum, Oct. 9, Nov. 20, 1980; lowest, 29-94 ft (9-13 m) below land-surface datum, Mar. 11, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 29.72 MAR 11 29.94 MAY 13 29-56 SEP 9 29.52 378 GROUND-WATER LEVELS

HUBBARD COUNTY

1)65142094433201. Local number, 139N3 2W16AA AO 1. LOCATION.—Lat 46°51'42", long 94°43'32", in NE4NE4NE4 sec.16, T.139 N, R.32 W., Hydrologic Unit 07010106, at Badoura Nursery. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 21 ft (6.4 m), screened 19 to 21 ft (5.8 to 6.4 m). DATUM.—Altitude of land-surface datum is 1,419 ft (433 Measuring point: Top of casing, 2.00 ft (0.6l m) above land-surface iatum. REMARKS.—Measured weekly by Archie Hakala. PERIOD OP RECORD.--September 1970 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 10.78 ft (3.29 m) below land-surface datum, Oct. 30, 1973; lowest, 15.51 ft (4.73 m) below land-surface datum, Apr. 12, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 6 14.10 DEC 8 14.03 FEB 16 14.53 APR 20 13.94 JUN 15 12.72 AUG 10 12.78 14 14.09 15 14.08 23 14.58 27 13.76 21 12.80 17 12.95 20 14.08 22 14.10 MAR 2 14.62 MAY 4 13.61 29 12.91 24 12.99 28 14.04 29 14.20 9 14.67 11 13.49 JUL 6 12.97 31 13.08 NOV 3 13.99 JAN 4 14.23 16 14.74 18 13.41 13 12.95 SEP 7 13.18 11 13.95 19 14.35 23 14.70 26 13.12 20 12.80 14 13.29 17 13.94 26 14.39 APR 6 14.42 JUN 12.90 27 12.71 21 13.32 24 13-94 FEB 2 14.44 13 14.41 12.77 AUG 3 12.68 28 13.35 DEC 1 13-95 9 14.48

465112095021501. Local number, 139N35W13DAD01. LOCATION.—Lat 46°51'12", long 95°02'15", in SEJNE4SE4 sec.13, T.139 N., R.35 W., Hydrologic Unit 07010106, 1 mi (1.6 km) west and 1 mi (1.6 km) north of Hubbard. Owner: U.S. Geological Survey AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 52 ft (15-8 m), screened 50 to 52 ft (15-2 to 15-8 m). DATUM.—Altitude of land-surface datum is 1,409 ft (429 m). Measuring point: Top of casing, 2.00 ft (0.61 m) above land-surface datum. PERIOD OF RECORD.—October 1974 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 38.01 ft (11.59 m) below land-surface datum, Aug. 15, 1975; lowest, 43.64 ft (13-30 m) below land-surface datum, July 19, 1977-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER i!98l TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

OCT 17 40.21 DEC 20 39.79 APR 17 38.59 JUN 12 38.05 AUG 15 38.48 SEP 17 NOV 14 39,94 JAN 18 39.50 MAY 15 38.85

465420094453901. Local number, 140N32W32BBA01. LOCATION.—Lat 46°54'20", long 94°45'39", in NE4NW4NW4 sec.32, T.140 N., R.32 W., Hydrologic Unit 07010106, 1.8 mi (2.9 km) west of Chamberlin. Owner: U.S. Geological Survey AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03[ tfl), depth 25.5 ft (7.8 m), screened 23-5 to 25-5 ft (7.2 to 7.8 m). DATUM.—Altitude of land-surface datum is 1,423 ft (434 m). Measuring point: top of casing, 2.50 ft (0.76 m) above land-surface datum. I PERIOD OF RECORD.—October 1974 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 21.74 ft (6.63 m) below land-surface datum, July 16, 1975; lowest, 24.95 ft (7.60 m) below land-surface datum, July 12, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 17 24.78 DEC 20 24.40 FSB 14 24.71 APR 17 24.10 JUN 12 23.47 AUG 15 23.60 NOV 14 24.45 JAN 18 24.65 MAR 13 24.80 MAY 15 24.00 JUL 16 23.39 SEP 17 23.82 379 GROUND-rfA '?:R LRVELS

HUBBARD COUN'T—Continued

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28 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

140N32W32B8A01

465640095072101. Local number, 140N35W16BCC01. LOCATION.—Lat 46°56'40", long 95°07'21", in SW4SW4Nrf4 sec.l6, T.140 N., R.35 W., Hydrologic Unit 07010106, northwest of Park Rapids. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 26 ft (7-9 m), screened 24 to 26 ft (7.3 to 7-9 m). DATUM.—Altitude of land-surface datum is 1,458 ft (444 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OP RECORD.—October 1974 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest rfater level, 14.86 ft (4.53 m) below land-surface datum, Aug. 15, 1975; lowest, 18.12 ft (5-52 m) below land-surface datum, June 14, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 17 17.06 DEC 20 17-25 FEB 14 17.03 APR 17 17-02 JUN 12 16.05 AUG 15 16.29 NOV 14 17.40 JAN 18 17.25 MAR 13 17.42 MAY 15 16.63 JUL 16 15.88 SEP 17 16.09

ISANTI COUNTY

453125093181101. Local number, 035N24W14BCD01. LOCATION.—Lat 45°31'25", long 93°l8'll", in SE4SW4NW4 sec.14, T.35 N., R.24 W., Hydrologic Unit 07010207, northwest of Isanti. Owner: Alien Kluck. AQUIFER.—Eau Claire - Mount Simon Formations of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in (0.30 m), depth 300 ft (91.4 m), cased to 105 ft (32.0 m). DATUM.—Altitude of land-surface datum is 940 ft (287 m). Measuring point: Hole in pump base, 0.10 ft (0.03 m) above land-surface datum. PERIOD OF RECORD.—February 1968 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 11.96 ft (3.65 m) below land-surface datum, July 17, 1975; lowest, 15-72 ft (4.79 m) below land-surface datum, Apr. 4, 1968.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL OCT 7 14.10 MAY 25 13.61 JUL 27 14.12 380 GROUND-WATER LEVELS

ISANTI COUNTY--Continued

453058093175901. Local number, 035N24W14CDC01. LOCATION.—Lat 45°30'58", long 93°17'59", in SWJSEJSWJ sec.14, T.35 N., R.24 W., Hydrologic Unit 07010207, northwest of Isanti. Owner: Ernest Kluck. AQUIFER.--Surficial outwash sand of Pleistocene Age. WELL CHARAGTEHISTICS.—Driven unused water-table well, diameter 1* in (0.03 m), depth 17 ft (5.18 m), screen information not available. DATUM.—Altitude of land-surface datura is 930 ft (283 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. P3RIOD OP RECORD.—March 1968 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest rfater level, 5.49 ft (1.67 m) below land-surface datum, May 21, 1979; lowest, 10.60 ft (3-23 m) below land-surface datum, Apr. 4, 1968.

WATER L£VEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 6 8.97 NOV 19 APR 1 MAY 25 8.40 JUL 27

453410093140001. Local number, 036N23W32ACB01. LOCATION.—Lat 45°34'10", long 93°14'00", in NWJSW4NE4 sec.32, T.36 W., R.23 W., Hydrologic Unit 07010207, in Cambridge. Owner: City of Cambridge, well 4. AQUIFER. —Hinckley Sandstone of Late Precambrian Age. WELL CHARACTERISTICS.—Drilled public-supply artesian well, diameter 20 in (0.51 m), depth 630 ft (192 m). cased to 352 ft (107 m). DATUM.—Altitude of land-surface datum is 960 ft (293 m). Measuring point: Edge of vent pipe, 3.00 ft (0.91 m) above land-surface datum. REMARKS.—Measured weekly by Thomas Minar. Water level affected by pumping. PERIOD OF RECORD.—July 1972 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 2.50 ft (0.76 m) below land-surface datum, Jan. 17, 1974; lowest, 16.95 ft (5-17 m) below land-surface datum, July 11, 1974.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 1 4.00 DEC 10 5.67 FEB 4 6.68 MAR 25 5.64 MAY 6 5.90 JUL 15 6.78 8 6.42 18 5.69 11 6.65 APR 1 6.59 13 5.86 AUG 26 9.02 23 5.04 31 6.37 18 6.58 8 4.51 20 3.45 SEP 2 4.50 29 4.78 JAN 7 6.35 25 6.82 15 4.06 JUN 3 3.90 9 5.58 NOV 5 3.66 14 5-55 MAR 4 6.45 22 5.60 24 9.06 17 5.09 19 6.48 21 6.50 11 6.75 29 3.32 JUL 1 6.45 23 4.28 DEC 3 6.49 28 6.81

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UJ 20 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

036N23W32ACB01 381 GROUND-WATER LEVELS

ITASCA COUNTY

471450093322001. Local number, 055N25W17ACD01. LOCATION.—Lat 47°14'50", long 93°32'20", in SE4SW4NE4 sec.17, T.55 N., R.25 W., Hydrologlc Unit 07010103, at west end of 13th Street NW, Grand Rapids. Owner: U.S. Geological Survey. AQUIFER.--Burled sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled observation water-table well, diameter 4 In (0.10 m), depth 147 ft (44.8 m), screened 143 to 147 ft (43.6 to 44.8 m). DATUM.—Altitude of land-surface datum Is 1,318 ft (402 m). Measuring point: Top of platform, 1.60 ft (0.49 m) above land-surface datum. PERIOD OP RECORD.—April 1962 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 29.04 ft (8.85 m) below land-surface datum, June 1, 1966; lowest, 33-92 ft (10.34 m) below land-surface datum, May 17, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

OCT 20 32.28 NOV 25 32.19 DEC 20 32.20 FEB 10 32.80 MAR 5 32.74 APR 10 32.15 NOV 5 32.20 30 32.14 25 32.21 15 32.70 10 32.77 15 32.40 10 32.19 DEC 5 32.17 31 32.22 20 32.68 15 32.79 20 33.60 15 32.18 10 32.21 JAN 5 32.22 25 32.69 20 32.80 25 33.80 20 32.16 15 32.21 FEB 5 32.93 28 32.71

JACKSON COUNTY

434742095191501. Local number, 104N37W19DBD01. LOCATION.—Lat 43°47'42", long 95°19'15", in SEJNWJSEJ sec.19, T.104 N., R.37 W., Hydrologlc Unit 07100001, at Heron Lake. Owner: City of Heron Lake, old railroad well. AQUIFER.--Sioux Quartzite of Late Precambrian Age. WELL CHARACTERISTICS.—Drilled public-supply artesian well, diameter 16 in (0.41 m), depth 323 ft (98.4 m), screened 205 to 225 ft (62.5 to 68.6 m). DATUM.—Altitude of land-surface datum is 1,420 ft (433 m). Measuring point: Edge of breather pipe, 2.60 ft (0.79 m) above land-surface datum. PERIOD OF RECORD.—August 1972, July 1973, September 1976, July 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 59.16 ft (18.03 m) below land-surface datum, Aug. 11, 1972; lowest, 66.10 ft (20.15 m) below land-surface datum, July 14, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 17 65.13 JAN 27 63.85 APR 64.63 JUN 14 64.11 ftUG 65.67

KANABEC COUNTY

454744093151601. Local number, 038N23W07DBB01. LOCATON.—Lat 45°47'44", long 93°15'l6", in NWJNWiSEi sec.7, T.38 N., R.23 W., Hydrologic Unit 07030004, on Chester Belkholm farm. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1J in (0.04 m), depth 21 ft (6.4 m), screened 19 to 21 ft (5.8 to 6.4 m). DATUM.—Altitude of land-surface datum is 963 ft (294 m). Measuring point: Top of casing, 1.60 ft (0.49 m) above land-surface datum. PERIOD OF RECORD.—October 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 9.91 ft (3.02 m) below land-surface datum, Mar. 29, 1982; lowest, 15.11 ft (4.61 m) below land-surface datum, Feb. 25, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL MAR 29 9-91 MAY 5 13-78 JUN 11 13.75 JUL 15 13-78 SEP 6 14.29 J0 " GROUND-WATER LEVELS

KAMABEC COUNTY—Continued

455342093134001. Local number, 039N23W05DAC01. LJCVTIOM.—Lat 45°53'42", Long 93°13'40", in SW4NE4SEJ sec.5, T.39 N., R.23 W., Hydrologic Unit 07030004, on Roman Miller property. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1J in (0.04 m), depth 4? ft (14.3 m), screened 45 to 47 ft (13.7 to 14.3 m). DATUM.—Altitude or land-surface datum is 1,030 ft (314 m). Measuring point: Top of casing, 4.00 ft (1.22 m) above land-surface datura. PERIOD OP RECORD.—December 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 14.28 ft (4.35 m) below land-surface datum, July 31, 1979; lowest, 18.28 ft (5-57 m) below land-surface datum, Mar. 22, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL MAR 29 18.25 MAY 5 16.62 JUN 11 16.68 JUL 15 16.75 SEP 17.23

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20 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

039N23W05DAC01

455236093172301. Local number, 039N24W11DDC01. LOCATION.—Lat 45°52'36", long 93°17'23", in SWJSEftSEJ sec.11, T.39 N., R.24 W., Hydrologic Unit 07030004, intersection of Forest Avenue and U.S. Highway 65. Owner: City of Mora, well 3. AQUIFER.--Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled public-supply artesian well, diameter 12 in (0.30 m), depth 170 ft (51.8 m), screened 150 to 170 ft (45.7 to 51.8 m). DATUM.—Altitude of land-surface datum is 1,011 ft (308 m). Measuring point: Edge of vent pipe, 2.40 ft (0.73 m) above land-surface datum. REMARKS.—Measured weekly by Donald Dahl. PERIOD OF RECORD.—March 1968 to current year. EXTREMES FOR PERIOD OF RECORD,—Highest water level, 32.28 ft (9.84 m) below land-surface datum, Apr. 6, 1973; lowest, 45.18 ft (13.77 m) below land-surface datum, Mar. 15, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l' TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATS LEVEL DATE LEVEL DATE LEVEL MAR 15 45.18 APR 7 44.21 APR 26 41.57 JUN 9 40.49 JUN 28 41.73 AUG 13 42.40 22 44.40 16 42.80 MAY 12 40.85 18 41.70 AUQ 3 42.20 16 43.30 APR 1 44.32 383 GROUND-WATER LEVELS

KANABEC COUNTY--Contlnued

455047093205401. Local number, 039N24W20DDD01. LOCATION.—Lat 45°50'47", long 93°20'54", in SE4SE4SE4 sec.20, T.39 N., R.24 W., Hydrologic Unit 07030004, 3.1 mi (5.0 km) southwest of Mora. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1J in (0.04 m), depth 26 ft (7.9 m), screened 24 to 26 ft (7-3 to 7-9 m). DATUM.—Altitude of land-surface datum is 964 ft (294 m). Measuring point: Top of casing, 1.50 ft (0.46 m) above land-surface datum. P3RIOO OF RECORD.—November 1930 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest \ater level, 5-56 ft (1.69 m) below land-surface datum, June 22, 1981; lowest, 6.19 ft (1.89 m) below land-surface datum, Sept. 23, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL OATE LEVEL DATE LEVEL HATE LEVEL OCT 31 5-92 NOV 29 5.83 MAR 29 5.86 MAY 5 5.57 JUN 11 5.85 J(7L 12 5.89

KANDIYOHI COUNTY

450730095014801. Local number, 119N35W14ABB01. LOCATION.—Lat 45°07'30", long 95°01'48", in NW4NW4NE4 sec.14, T.119 N., R.35 W., Hydrologic Unit 07020004, at Willmar. Owner: Burlington Northern, Inc. AQUIFER.--Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 10 in (0.25 m), depth 320 ft (97-5 m), screened 297 to 320 ft (89.9 to 97-5 m). DATUM.—Altitude of land-surface datum is 1,140 ft (347 m). Measuring point: Wood floor of recorder shelter, 1.00 ft (0.30 m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OF RECORD.—December 1967 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 12.78 ft (3-90 m) below land-surface datum, May 12, 1969; lowest, 32.50 ft (9.91 m) below land-surface datum, Aug. 27, 1976.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 LOWEST VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

5 27.47 26.02 25.50 24.00 24.27 23.82 23.29 23.57 24.00 25.65 25.23 24.92 10 27.75 25.89 25.18 24.19 25.23 23.67 22.73 24.13 24.12 25.22 25.72 24.92 *\ i-f r-Q O o D 1 15 ^7.5° 26.17 24.92 o.o / 24.16 23.34 22.77 24.47 25.01 25.36 24.16 20 26.91 26.67 24.62 24.02 24.69 23.46 22.35 24.72 25.00 26.01 23.77 25 26.10 26.02 24.23 24.02 24.28 23.28 21.78 24.52 24.40 25.10 25.93 23.78 EOM 25.90 25.59 24.05 24.07 23-95 23.36 22.62 23.86 24.93 24.72 25.22 23.48 WTR YEAR 1982 HIGHEST 21.47 APR 25, 1982 LOWEST 28.09 OCT 9, 1981

452415094503001. Local number, 122N33W04BCD01. LOCATION.—Lat 45°24'15", long 94°50'30", in SEJSW4NW4 sec.4, T.122 N., R.33 W., Hydrologic Unit 07010204, at Regal. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 m), depth 17 ft (5.2 m), screened 14 to 17 ft (4.3 to 5.2 m). DATUM.—Altitude of land-surface datum is 1,220 ft (372 m). Measuring point: Top of casing, 4.40 ft (1.34 m) above land-surface datum. PERIOD OF RECORD.—December 1966 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest *ater level, 4.86 ft (1.48 m) below land-surface datum, June 26, 1979; lowest, 11.40 ft (3-47 m) below land-surface datum, Feb. 26, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 27 8.19 DEC 28 8.61 MAR 31 7.57 JUL 10 6.95 AUG 30 7.78 SEP 30 7.75 NOV 28 8.41 FEB 23 9.01 MAY 26 6.88 AUG 7 7.^3 384 GROUND-WATER LEVELS

KANDIYOHI COUNTY—Continued

452400095001001. Local number, 122N34W06CBC01. LOCATION.—Lat 45°24'00", long 95°00'40", in SWJNWiSWJ sec.6, T.122 N., R.34 W., Hydrologic Unit 07010204, 3.4 mi (5.5 km) south of Belgrade. Owner: U.S. Geological Survey. I AQUIFER.--Surficial sand of Pleistocene Age. j rfELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 ra)l depth 23 ft (7-0 m), screened 20 to 23 ft (6.1 to 7.0 m). ] DATUM.—Altitude of land-surface datum is 1,237 ft (377 m). Measuring point: Top of platform, 0.80 ft (0.24 m) above land-surface datum. PERIOD OP RECORD.—October 1966 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 4.71 ft (1.44 m) below land-surface datum, Apr. 28, 1979; lowest, 11.61 ft (3.54 m) below land-surface datum, Feb. 26, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 27 7.69 DEC 28 8.62 MAR 31 7.10 JUL 10 8.51 AUG 30 8.49 SEP 30 9.22 NOV 28 7.88 FEB 23 8.97 MAY 26 7.93 AUG 7 9.19

LE SUEUR COUNTY

442522093543901. Local number, 111N26W14ADA01. LOCATION.—Lat 44°25'22", long 93°54'39", in NE*SE*NE4 sec.14, T.lll N., R.26 W., Hydrologic Unit 07020012, 0.85 mi (1.37 km) south of Le Sueur. Owner: Merle Moser. AQUIFER.—Buried gravel of Pleistocene Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 16 in (0.41 m), depth 242 ft (73.8 m), screened 212 to 242 ft (64.6 to 73-8 m). DATUM.—Altitude of land-surface datum is 855 ft (26l m). Measuring point: Edge of vent pipe, 1.20 ft (0.37 m) above land-surface datum. PERIOD OF RECORD.—January 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 82.32 ft (25.09 m) below land-surface datum, Mar. 3, 1980; lowest, 84.55 ft (25-77 m) below land-surface datum, Mar. 9, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 9 84.38 MAR 9 84.55 MAY 17 83.73 SEP 15 84.46

443234093333501. Local number, 112N23W023AB01. LOCATION.—Lat 44°32'34", long 93°33'35", in NWJNEJNtfJ sec.2, T.112 N., R.23 W., Hydrologic Unit 07020012, just east of New Prague. Owner: Holy Trinity Lutheran Church. AQUIFER.--St. Lawrence Formation of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 4 in (0.10 m), depth 180 ft (54.9 m), cased to 155 ft (47.2 m). DATUM.—Altitude of land-surface datum is 1,005 ft (306 m). Measuring point: Top of casing, 1.00 ft (0.30 m) above land-surface datum. PERIOD OF RECORD.—April 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 96.20 ft (29-32 m) below land-surface datum, Mar. 3, 1980; lowest, 99.42 ft (30.30 m) below land-surface datum, July 26, 1979-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WAT^R WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 97.20 JAN 12 96.80 MAR 9 96.69 MAY 4 96.83 SEP 13 97.64 385 GROUND-WATER LEVELS

LE SUEUR COUNTY—Continued

443147093374501. Local number, 112N23W06DDD01. LOCATION.—Lat 44°31'4?",long 93°37'45", in SE*SE4SE4 sec.6, T.112 N., R.23 W., Hydrologic Unit 07020012, 3 mi (4.8. km) southwest of New Prague. Owner: Friedens Lutheran Church. AQUIFER.--St. Lawrence Formation of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 5 in (0.13 m), depth 265 ft (80.8 m), cased to 209 ft (63.7 m). DATUM.—Altitude of land-surface datum is 1,019 ft (311 m). Measuring point: Top of casing, 1.70 ft (0.52 m) above land-surface datum. PERIOD OF RECORD.—April 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 150.8 ft (45-96 m) below land-surface datum, Mar. 18, 1981; lowest, 152.0 ft (46.33 m) below land-surface datum, Sept. 13, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 151.5 MAR 4 150.9 MAY 4 151.0 SEP 13 152.0

LINCOLN COUNTY

441705096084501. Local number, 110N44W33DCD01. LOCATION.—Lat 44°17'05", long 96O 08'45", in SE*SW4SE4 sec.33, T.110 N., R.44 W., Hydrologic Unit 07020006, at Tyler. Owner: U.S. Geological Survey. AQUIFER.—Dakota Sandstone of Lower Cretaceous Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 8 in (0.20 m), depth 967 ft (295 m), screened 890 to 900 ft (271 to 274 m). DATUM.—Altitude of land-surface datum is 1,738 ft (530 m). Measuring point: Top of recorder platform, 3.50 ft (1.07 m) above land-surface datum. PERIOD OF RECORD.—November 1969 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 248.4 ft (75-71 m) below land-surface datum, Apr. 20, 1970; lowest, 250.8 ft (76.44 ra) below land-surface datum, Nov. 12, 1976.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DEC 8 249.6 MAR 12 249.0 APR 12 249.0 JUN 1 249.3 AUG 23 249.6

MARTIN COUNTY

434359094422201. Local number, 103N32W08CCD01. LOCATION.—Lat 43°43'59", long 94°42'22", in SE^SWiSWi sec.8, T.103 N., R.32 W., Hydrologic Unit 07020009, 1.5 mi (2.4 km) south of Triumph. Owner: Robert Olson. AQUIFER.--Sandstone of Cretaceous Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 16 in (0.41 m), depth 412 ft (126 m), screened 372 to 412 ft (113 to 126 m). DATUM.—Altitude of land-surface datum is 1,242 ft (379 m). Measuring point: Vent pipe, 0-50 ft (0.15 m) above land-surface datum. PERIOD OF RECORD.—July 1981 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 91.56 ft (27-91 m) below land-surface datum, May 17, 1982; lowest, 92.39 ft (28.16 m) below land-surface datum, July 9, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 9 92.28 MAR 9 91.68 MAY 17 91.56 SEP 15 92.32 3 GROUND-WATER LEVELS

MARTIN COUNTY—Continued

4347205094483001. Local number, 104N33W28BAB01. LOCATION.—Lat 43°47'25", long 94°48'30", In NW4NEJNW4 sec.28, T.104 N., R.33 W., Hydrologlc Unit 07020009, 6.6 mi (10.6 km) northwest of Trimont. Owner: Kenneth Schafer. AQUIFER.—Sioux Quartzite of Late Precambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 5 in (0.13 m), depth 178 ft (54.2 m), cased to 121 ft (36.9 m). DATUM.—Altitude of land-surface datum is 1,290 ft (393 m). Measuring point: Top of casing, 1.30 ft (0.40 m) above land-surface datum. PERIOD OP RECORD.—September 1981 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest rfater level, 84.24 ft (25.68 m) below land-surface datum, May 17, 1982; lowest, 85.17 ft (25.96 m) below land-surface datum, Nov. 9, 1981.

WATER LEVEL, EN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL MOV 9 85.17 MAR 9 84.58 MAY 17 84.24 SEP 15

MC LEOD COUNTY

444630094021601. Local number, 115N27W14ABA01. LOCATION.—Lat 44°46'30", long 94°02'l6", in NE4Nrf4NE4 sec.14, T.115 N., R. 27 W., Hydrologic Unit 07010205, in City of Plato. Owner: Kenny's Garage. Formerly Plato Creamery. AQUIFER.--Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 6 in (0.15 m), depth 67 ft (20.4 m). DATUM.--Altitude of land-surface datum is 990 ft (302 m). Measuring point: Edge of pump base, 0.70 ft (0.21 m) above land-surface datum. REMARKS.--Water level affected by pumping. PERIOD OF RECORD.—September 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 24.97 ft (7.6l m) below land-surface datum, May 10, 1979; lowest, 34.58 ft (10.54 m) below land-surface datum, July 12, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER I WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE | LEVEL JAN 7 25.64 MAR 15 26.67 MAY 14 24.62 JUL 12 , 34.58

444758094132101. Local number, 115N28W05ACC01. LOCATION.—Lat 44°47'58", long 94°13'21", in SW4SW4NE4 sec.5, T.115 N., R.28 W., Hydrologic Unit 07010205, northwest of Glencoe. Owner: Graupmann Farms, Inc. AQUIFER.--Mount Simon Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in (0.30 m), depth 472 ft (144 m), screened 432 to 472 ft (132 to 144 m). DATUM.—Altitude of land-surface datum is 1,036 ft (316 m). Measuring point: Edgp of vent pipe, 2.00 ft (0.6l m) above land-surface datum. PERIOD OF RECORD.—September 1978 to current year. I EXTREMES FOR PERIOD OF RECORD.—Highest water level, 80.50 ft (24.54 m) below landj-surface datum, Aug. 20, 1979; lowest, 109.6 ft (33.41 m) below land-surface datum, Oct. 1, 1979- I

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER rfATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 9 87.02 MAR 15 84.23 MAY 14 84.17 JUL 12 89-12 38? GROUND-WATER LEVELS

MC LEOD COUNTY--Continued

444704094090801. Local number, 115N28W11ADD01. LOCATION.—Lat 44°47'04", long 94°09'08", in SE^SEJNEJ sec.11, T.115 N., R.28 W., Hydrologic Unit 07010205, 0.4 mi (0.6 kin) north of Glencoe. Owner: McLeod County Highway Department. AQUIFER.--Mount Simon Sandstone of Late Cambrian Age. rfELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 5 in (0.13 m), depth 500 ft (152 m), cased to 446 ft (136 m). DATUM.—Altitude of land-surface datum is 1,020 ft (311 m). Measuring point: Top of casing, 1.00 ft (0.30 m) above land-surface datum. PERIOD OP RECORD.—November 1972 to current year. EXTREMES FOrt PERIOD OF RECORD.—Highest water level, 137.2 ft (41.82 m) below land-surface datum, Jan. 7, 1982; lowest, 148.0 ft (45.10 m) below land-surface datura, July 18, 1979.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 9 139-1 JAN 7 137-2 MAY 14 140.5 JUL 12 142.5

130

132

134

136

138

140

142

1 44

146

148

150 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

115N28W11ADD01

444819094164701. Local number, 116N29W35DDC01. LOCATION.—Lat 44°48'19", long 94°l6'47", in SW4SE4SE4 sec.35, T.116 N., R.29 W., Hydrologic Unit 07010205, 1.3 mi (2.1 km) south of Biscay. Owner: Charles Johnson. AQUIFER.--Buried sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in-(0.30 m), depth 269 ft (82.0 m). screened 229 to 269 ft (69.8 to 82.0 m). DATUM.—Altitude of land-surface datum is 1,050 ft (320 m). Measuring point: Edge of vent pipe, 1.00 ft 0.30 m) above land-surface datum. PERIOD OF RECORD.—September 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 25.37 ft (7-73 m) below land-surface datum, Feb. 5, 1980; lowest, 29.93 ft (9-12 m) below land-surface datum, Sept. 9, 1980.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198! TO SEPTEMBER 1982

WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL NOV 9 28.00 MAY 14 25.65 JUL 12 25.74 •3°° GROUND-WATER LEVELS MC LEOD COUNTY--Continued

445721094031201. Local number 117N27W10DAA01. LOCATION.—Lat 44°57'21", long 94°03'12", in NEJNEjSiS* sec.10, T.117 N., R.27 W., Hydrologic Unit 07010205, 0.1 mi (0.2 km) south of Winsted. Owner: Winsted Farmers Coop. AQUIFER.--Buried sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled industrial artesian well, diameter 4 in (0.10 m), djspth 129 ft (39.3 m), screened 125 to 129 ft (38.1 to 39.3 m). DATUM.—Altitude of land-surface datum is 1,015 ft (309 m). Measuring point: Top of casing, 1.40 ft (0.43 m) above land-surface datum. PERIOD OF RECORD.—November 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 32.55 ft (9-92 m) below land-surface datum, June 20, 1979; lowest, 41.52 (12.66 m) below land-surface datum, Nov. 3, 1977-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 9 36.60 JAN 7 3^.33 MAR 15 34.40 MAY 14 35.40 JUL 12 34.20 SEP 22 36.45

MEEKER COUNTY

450632094290801. Local number, 119N30W19AAB01. LOCATION.—Lat 45°06'32", long 94°29'08", in NWJNEJNEJ sec.19, T.119 N., R.30 W., Hydrologic Unit 07010204, on Ted Carlson farm. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1J in (0.04 m), depth 26 ft (7-9 m), screened 24 to 26 ft (7.3 to 7.9 m). DATUM.—Altitude of land-surface datum is 1,130 ft (344 m). Measuring point: Top of casing, 3-30 ft (1.01 m) above land-surface datum. PERIOD OF RECORD.—November 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 3.04 ft (0.93 m) below land-surface datum, Apr. 23, 1982; lowest 6.74 ft (2.05 m) below land-surface datum, Feb. 3, 198l.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 8 5.76 FEB 9 6.17 MAR 26 4.72 APR 23 3.04 JUN 21 3-31 AUG 18 5.31 NOV 18 5.39

10 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

119N30W19AAB01 389 GROUND-WATER LEVELS

MEEKER COUNTY--Continued

451542094322301. Local number, 121IJ3 1W26BDC01. LOCATION.—Lat 45°15'42", long 94°32'23", in SW4SE4NW4 sec.26, T.121 N., R.31 W., Hydrologic Unit 07010204, on Keith Langmo farm. Owner: U.S. Geological Survey. AQUIFER.--Surficlal sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1J in (0.04 m), depth 16 ft (4.9 m), screened 14 to 16 ft (4.3 to 4.9 m). DATUM.—Altitude of land-surface datum Is 1,112 ft (339 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—November 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 3-57 ft (1.09 m) below land-surface datum, June 21, 1982; lowest, 6.59 ft (2.01 m) below land-surface datum, Mar. 12, 1979.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, rfATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 8 4.62 FEB 9 5.52 MAR 26 4.09 APR 23 3.74 JUN 21 3-57 AUG 18 5.73 NOV 18 4.60

MILLE LACS COUNTY

454450093395701. Local number, 038N27W35ABC01. LOCATION.—Lat 45°4V50", long 93°39'57", in SW4NW4NE4 sec.35, T.38 N., R.27 W., Hydrologic Unit 07010207, In Milaca. Owner: City of Milaca, creamery well. AQUIFER.--Burled sand and gravel of Pleistocene Age. rfELL CHARACTERISTICS.—Drilled unused artesian well, diameter 12 in (0.30 m), depth 82 ft (25.0 m), screened 67 to 82 ft (20.1 to 25.0 m). DATUM.—Land-surface datum is 1,082.2 ft (329-8 rn) National Geodetic Vertical Datum of 1929. Measuring point: Top of platform, 3.00 ft (0.91 m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OP RECORD.--September 1967 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 36.74 ft (11.20 m) below land-surface datum, July 26, 1972; lowest, 42.81 ft (13.05 m) below land-surface datum, Aug. 27, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 LOWEST VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

5 ...... 4 1 . 29 40.11 41.24 40.17 40.44 40.82 10 ...... 41.14 ...... 39.91 41.31 39-92 40.49 40.76 15 41.26 ...... 39.78 40.10 40.04 40.57 40.69 20 ...... 41.02 39.53 39.92 40.15 40.18 40.67 40.62 pc ...... 39.81 40.16 40.31 40.71 40.69 EOM ...... 40.03 40.17 40.32 40.75 40.79 WTR YEAR 1982 HIGHEST 39-48 APR 20, 1982 LOWEST 40.82 SEP 5-6, 1982

MORRISON COUNTY

455135094092801. Local number, 039N31W23DAA01. LOCATION.—Lat 45°51'35", long 94°09'28", in NE4NE4SE4 sec.23, T.39 N., R. 31 W., Hydrologic Unit 07010201, on Kelzenberg farm. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand of Pleistocene Age. rfELL CHARACTERISTICS.—Driven observation water-table well, diameter 14 in (0.03 m), depth 12 ft (3-7 m), screened 10 to 12 ft (3.0 to 3.7 m). DATUM.—Altitude of land-surface datum is 1,104 ft (336 m). Measuring point: Top of casing, 0.50 ft (0.15 m) above land-surface datum. PERIOD OF RECORD.—October 1973 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 3.72 ft (1.13 m) below land-surface datum, July 14, 1978; lowest, dry below land-surface datum, July and Aug. 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 14 6.80 DEC 14 5.75 MAR 16 7.85 JUL 22 5.10 AUG 18 6.50 SEP 17 5.25 NOV 18 5.50 FEB 8 7.45 390 GROUND-WATER LEVELS

MORRISON COUNTY—Continued

455253094195801. Local nuTiber, 039N3 2W09DCC01. LOCATION.—Lat 450 52'53", long 94°19'58", in SWiSWJSEJ sec.9, T.39 N., R.32 W., Hydrologic Unit 07010201, north of Royalton. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 21 ft (6.4 m), screened 19 to 21 ft (5.8 to 6.4 m). DATUM.—Altitude of land-surface datum is 1,092 ft (333 m). Measuring point: Top ,of casing, 2.00 ft (0.6l m) above land-surface datum. PERIOD OP RECORD.—October 1969 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 3.00 ft (0.91 m) above land-surface datum, Apr. 17, 1979; lowest, 3.91 ft (1.19 m) below land-surface datum, Feb. 22, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 14 1.15 DEC 14 1.60 MAR 16 2.32 JUN 15 1.40 AUG 18 2.15 SEP 17 1.20 NOV 18 1.30 JAN 12 2.08 4PR 7 0.20 JUL 22 1.45

460148094190701. Local number, 041N32W13DCAO2. LOCATION.—Lat 46°01'14", long 94°19'07", in NE4SWJ3E* sec.13, T.41 N., R.32 W., Hydrologic Unit 07010104, east of Belle Prairie. Owner: O'Day Farm. AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.--Drilled irrigation water-table well, depth 36 ft (11.0 m), depth of screen unknown. DATUM.—Altitude of land-surface datum is 1,131 ft (345 m). Measuring point: Top of casing, 1.70 ft (0.52 m) above land-surface datum. PERIOD OF RECORD.—October 1968 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 1.19 ft (0.36 m) below land-surface datum, Aug. 2, 1972; lowest, 8.60 ft (2.62 m) below land-surface datura, Aug. 13, 1976.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 14 5.50 DEC 14 5.45 APR 7 5.32 JUL 22 5.40 AUG 18 6.77 SEP 17 5.65 NOV 18 5.15 JAN 12 5.80 JUN 15 4.20

1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 19/7 1978 1979 1980 1981 1982

041N32W13DCA02 391 GROUND-WATER LEVELS

MORRISON COUNTY—Continued

460444094212501. Local number, 130N29W08DCC01. LOCATION.—Lat 46°04'44", long 94°21'25", in SW4SW4SEJ sec.8, T.130 N., R.29 W., Hydrologic Unit 07010104, at Camp Ripley. Owner: U.S. Geological Survey. AQUIFER.—Surficial outwash sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled observation water-table well, diameter 2 in (0.05 m), depth 59 ft (18.0 m), screened 56 to 59 ft (17.1 to 18.0 m). DATUM—Land-surface datum is 1,149.0 ft (350.2 m) National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 2.10 ft (0.64 m) above land-surface datum. REMARKS.—Measured weekly by Theodore Wilczek. Water levels used in monthly Water Resources Review. Water-level hydrograph for this well is in the introduction to this volume (figure 4). PERIOD OP RECORD.—April 1949 to current year. EXTREMES TOR PERIOD OP RECORD.—Highest water level, 7.35 ft (2.24 m) below land-surface datum, July 28, 1972; lowest, 19.75 ft (6.02 m) below land-surface datum, Aug. 4, 1961. WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 2 14.65 DEC 4 14.10 FEB 5 14.59 APR 16 14.09 JUN 11 13.22 AUG 13 13.53 9 14.55 11 14.17 12 14.66 23 13.97 18 13.29 20 13.58 16 14.52 18 14.28 19 14.74 30 14.02 25 13.31 27 13.59 23 14.39 24 14.22 26 14.83 MAY 7 13.91 JUL 2 13.05 SEP 2 13.52 30 14.28 31 14.10 MAR 5 14.85 14 13.89 9 13.22 10 13.40 NOV 6 14.22 JAN 8 14.28 12 14.95 21 13.50 16 13.51 17 13.25 13 14.16 15 14.40 19 14.66 28 13.38 22 13-76 23 13.18 19 14.15 22 14.54 APR 2 15.17 JUN 4 13.15 AUG 6 13.64 30 13.14 27 14.13 29 14.51 9 14.13

MOWER COUNTY

434010093010801. Local number, 102N18W05ACB01. LOCATION.—Lat 43°40'10", long 93°01'08", in NWJSW4NE4 sec.5, T.102 N., R.18 W., Hydrologic Unit 07080201, in Austin. Owner: Church of Latter Day Saints. AQUIFER.—Cedar Valley Formation of Middle Devonian Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 5 in (0.13 m), depth 100 ft (30.5 m), cased to 77 ft (23.5 m). DATUM.—Altitude of land-surface datum is 1,230 ft (375 m). Measuring point: Top of casing, 0.80 ft (0.24 m) above land-surface datum. PERIOD OF RECORD.—July 1981 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 34.70 ft (10.58 m) below land-surface datum, May 18, 1982; lowest, 37.72 ft (11.50 m) below land-surface datum, July 10, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

NOV 10 36.90 JAN 14 37.28 MAY 18 34.70 SEP 16 35.59

434417093521001. Local number, 103N17W09DAA01. LOCATION.—Lat 43°44'17", long 93 O 52'10", in NEJNE4SE4 sec.9, T.103 N., R.17 W., Hydrologic Unit 07080201, in Brownsdale. Owner: Land 0'Lakes, creamery well. AQUIFER.--Cedar Valley Formation of Middle Devonian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 4 in (0.10 m), depth 130 ft (39-6 m), casing information not available. DATUM.—Altitude of land-surface datum is 1,280 ft (390 m). Measuring point: Top of well cap, 0.40 ft (0.12 m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OF RECORD.--February 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 38.68 ft (11.79 m) below land-surface datum, May 12, 1982; lowest, 45.20 ft (13.78 m) below land-surface datum, Mar. 30, 1978.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 7 42.62 DEC 17 40.46 FEB 1 40.03 MAR 12 39.97 MAY 12 38.68 AUG 24 39.78 i tr1 G o o t-1 SD 1— 1 ; co £- M *-. 3= o o m c ; o "ii oo 1-3 ro z; 3 O TOM • M co ct ra o D 50 o co o o

• CD 33 I 3 ?T • U1 1 3 > I CD 3 I CO O 5a P ct ro o GO ' U1U1 R) 3» • • <; >-3 raT co p .cr -t cr\ L*J M 33 'D OctO coo tr 50 MH-aC i— M H- G C COO.CtJs-. - Co O . ct 1-3 H- M 3" -t ' t-3 H- CO ffV 1-1 P • S O ci M o> o ir1 •3) CH WQCOoO M 3» • CO Q ct - O • . CO CD ct CO Z « P O IV)P I p) O ' 3 ro O oof-1 I 3 M O • ro IX) &« i CD a o i) iui oq O OT 1 T P H- O CD 3 O 3" t-1 3 a a P P o cr x 1—13 3 CD O 0<5 D.I co co ?] > CT T C/3 t- DEPTH TO WATER. IN FEET BELOW LAND SURFACE CO P3 C Q U1 I—1 CO H- ?3 W oo co ro tr1 50 <; t-1 CD un Z P V; cr O • ro o H- 1) - 3 s. a> "•» ct ct '•— • (B H- PJCB . ct CO OT<<; (i)ct 1 T O i o D. CD ct CD 33 <; p 3 ?3> ctCD CTCD

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J—' KJ Lri i— tr1 33 GROUND-WATER LEVELS 393

OLMSTED COUNTY

435920092273801. Local number, 106N14W14ADB01. LOCATION.—Lat 43°59'20", long 92°27'33", in NW4SE4NE4 sec.lt, T.106 N., R.14 W., Hydrologic Unit 07040004, in Rochester. Owner: Golden Hill School Dist. #1371. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 6 in (0.15 m), depth 478 ft (146 m), cased to 397 ft (121 m). DATUM.—Altitude of land-surface datum is 1,065 ft (325 m). Measuring point: Edge of well cap, 1.80 ft (0.55 m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OP RECORD.--August 1974 to current year. EXTREMES TOR PERIOD OP RECORD.—Highest water level, 50.73 ft (15.46 m) below land-surface datum, Apr. 18, 1975; lowest, 62.30 ft (18.99 m) below land-surface datum, June 8, 1976.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 6 57.68 DEC 17 53-94 FEE 3 55-76 MAR 12 56.83 MAY 12 55-90 AUG 25 56.60

OTTER TAIL COUNTY

460838095150001. Local number, 131N36W20BCC01. LOCATION.—Lat 46°08'38", long 95°15'00", in SW4SW4NW4 sec.20, T.131 N., R.36 W., Hydrologic Unit 07010107, 4.4 mi (7.1 km) east of Parkers Prairie. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 27 ft (8.2 m), screened 25 to 27 ft (7.6 to 8.2 m). DATUM.—Altitude of land-surface datum is 1,442 ft (440 m). Measuring point: Top of casing, 3.00 ft (0.91 m) • above land-surface datum. PERIOD OF RECORD.—June 1972 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 11.17 ft (3.40 m) below land-surface datum, July 30, 1972; lowest, 18.49 ft (5.64 m) below land-surface datum, Feb. 16, 1977-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 16 16.07 DEC 17 15.71 FEB 16 16.40 APR 15 15-13 JUL 19 14.43 SEP 17 15.15 NOV 18 16.02 JAN 13 16.22 MAR 16 16.54 JUN 15 14.71 AUG 18 15.07

461850095191401. Local number, 133N37W23CCB01. LO.CATION.—Lat 46°18'50", long 95°19'l4", in NW4SW4SW4 sec.23, T.133 N., R.37 W., Hydrologic Unit 07010107, 5.3 mi (8.5 km) south of Deer Creek. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 20 ft (6.1 m), screened 18 to 20 ft (5.5 to 6.1 m). DATUM.—Altitude of land-surface datum is 1,445 ft (440 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—August 1972 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 6.68 ft (2.04 m) below land-surface datum, Sept. 4, 1972; lowest, 13.27 ft (4.04 m) below land-surface datum, Feb. 16, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 16 11.22 DEC 17 11.15 FEB 16 11.46 APR 15 10.44 JUN 15 9.21 AUG 18 9.59 NOV 18 11.07 JAN 13 11.28 MAR 16 11.53 MAY 25 9.31 JUL 19 9.16 SEP 17 9.78 394 GROUND-WATER LEVELS

OTTER TAIL COUNTY—Continued

462024095352301. Local number, 133N39W10CCD01. LOCATION.—Lat 46O 20'24", long 95°35'23", in SE4SW4SW4 sec.10, T.133 N., R.39 W., Hydrologic Unit 07010107, northwest of Vining. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 m), depth 42 ft (12.8 m), screened 39 to 42 ft (11.9 to 12.8 m). DATUM.—Land-surface datum is 1,330.5 ft (405.5 m) National Geodetic Vertical Datura of 1929. Measuring point: Top of casing, 0.50 ft (0.15 m) above land-surface datum. PERIOD OP RECORD.—March 1969 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 6.60 ft (2.01 m) below land-surface datum, Nov. 30, 1972; lowest, 10.25 ft (3.12 m) below land-surface datum, Feb. 14, 1977-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 9-09 DEC 16 8.45 FEB 12 8.59 APR 13 8.56 JUN 16 7.97 AUO 17 8.07 NOV 12 9.05 JAN 12 8.67 MAR 15 8.76 MAY 20 8.34 JUL 14 7-72 SEP 14 8.17

I I I I

1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

133N39W10CCD01

PINE COUNTY

455737092390001. Local number, 040N18W18DBC01. LOCATION.—Lat 45°57'37" J long 92°39'00", in SW4NW4SEJ sec.18, T.40 N., R.18 W., Hydrologic Unit 07030001, 4.2 mi (6.8 km) southwest of Cloverdale. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 34.5 ft (10.5 m), screened 31 to 34.5 ft (9.4 to 10.5 m). DATUM.—Altitude of land-surface datum is 890 ft (271 m). Measuring point: Top of casing, 3-45 ft (1.05 m) above land-surface datum. PERIOD OF RECORD.—October 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 29.59 ft (9.02 m) below land-siurface datum, June 11, 1982; lowest, 31.98 ft (9.75 m) below land-surface datum, Apr. 28, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 31 30.72 NOV 29 30.67 MAY 5 30.54 JUN 11 29.59 JUL 15 30.06 SEP 6 30.18 0SOUND-WATER LEVELS 395

PINE COUNTY—Continued

455939092365801. Local number, 041N18W33AAD01. LOCATION.—Lat 45°59'39", long 92°36'58", In SEJNEJNEi sec.33, T.41 N., R.18 W., Hydrologic Unit 07030001, in St. Croix State Park. Owner: U.S. Geological Survey. AQUIFER .--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter li in (0.04 ra), deptn 24 ft (7.3 m), screened 22 to 24 ft (6.7 to 7.3 m). DATUM.—Altitude of land-surface datum is 975 ft (297 ra). Measuring point: Top of casing, 3.00 ft (0.91 ra) above land-surface datum. PERIOD OP RECORD.—November 1977 to current year. EXTREMES FOR PERIOD OP RECORD.—Hignest water level, 7-29 ft (2.22 m) below land-surface datum, July 31, 1979; lowest, 11.27 ft (3.44 ra) below land-surface datum, Mar. 20, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTE'MiSR 1982 WATER WATER WATER WATER WATER DATE LEVEL OATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL MAR 29 9.81 MAY 5 8.26 JUN 11 7-76 JUL 15 8.26 SEP 6

4

5

6

7

8

9

10

1 1

12

13

14 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

041N18W33AAD01

455947092542301. Local number, 041N20W32BBB01. LOCATION.—Lat 45°59'47", long 92°54'23", in NW4NWJNW4 sec.32, T.41 N., R.20 W., Hydrologic Unit 07030004, on Howard Sikkink farm. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1J in (0.04 m) , depth 44 ft (13.4 m), screened 42 to 44 ft (12.8 to 13.4 m). DATUM.—Altitude of land-surface datum is 1,014 ft (309 m). Measuring point: Top of casing, 2.30 ft (0.70 m) above land-surface datura. PERIOD OF RECORD.—December 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 17.49 ft (5.33 m) below land-surface datum, July 31, 1979; lowest, 20.82 ft (6.35 m) below land-surface datum, Mar. 29, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL MAR 29 20.82 MAY 5 19.80 JUN 11 19.84 JUL 15 19.87 SEP 6 20.02 396 GROUND-WATER LEVELS

PINE COUNTY—Continued

461809092481301. Local number, 044N20W13AAA01. LOCATION.—Lat 46°l8'09", long 92°48'13", in NE*NS4NE4 sec.13, T.44 M., R.20 W., Hydrologic Unit 07030003, 1.0 mi (1.6 km) southeast of Willow River. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table .veil, diameter 2 in (0.05 m), depth 29 ft .8 m), screened 27 to 29 ft (8.2 to 8.8 m). DATUM.—Altitude of land-surface datura is 1,070 ft (326 m) Measuring point: Top of casing, '4.60 ft (1.40 m) above land-surface datura. PERIOD OP RECORD.—August 1980 to current year. EXTREMES TOR PERIOD OP RECORD.—Highest water level, 9-46 ft (2.88 >n) below land-surface datum, May 5, 1982; lowest, 11.98 ft (3.65 m) below land-surface datura, Mar. 18, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1932

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 31 9.63 MAR 29 10.56 JUN 11 9.54 JUL 25 9.66 AUG 9 9.94 SEP 23 NOV 20 9.81 MAY 5 9.46 JUL 15 9-52

462112092495801. Local number, 045N20W26DB301. LOCATION.—Lat 46°21'12", long 92°49'58", in NWJNWJSEJ sec.26, T.45 M., R.20 W., Hydrologic Unit 07030003, at General Andrews Nursery. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Driven observation water-table well, diameter 14 in (0.03 m), depth 28 ft (8.5 m), screened 26 to 28 ft (7.9 to 8.5 m). DATUM.—Altitude of land-surface datum is 1,060 ft (323 m). Measuring point: Top of casing, 0.50 ft (0.15 m) above land-surface datura. REMARKS.—Measured weekly by Ralph Nelson. PERIOD OF RECORD.--August 1968 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 16.10 ft (4.91 m) below land-surface datum, Aug. 12, 1974; lowest, 22.49 ft (6.85 m) below land-surface datum, Sept. 26, 1980.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OATE LEVEL OCT 4 20.84 JAN 2 21.46 MAY 11 20.36 JUN 14 19.72 JUL 15 20.13 AUG 16 20.30 25 20.59 17 21.54 24 19.92 21 19-80 17 20.05 30 20.45 NOV 6 20.60 MAR 29 21.64 31 19.68 30 19.93 22 20.08 SEP 6 20.66 DEC 6 20.70 MAY 5 20.58 JUN 11 19.84 JUL 11 20.00 AUG 10 20.15 12 20.52

PIPESTONE COUNTY

4356l0096o826oi. Local number, 106N44W33CCD01. LOCATION.—Lat 43°56'10", long 96°08'26", in SEJSWiSWi sec.33, T.106 N., R.44 W., Hydrologic Unit 10170204, 4 mi (6.4 km) north of Edgerton. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter li in (0.04 m), depth 16 ft (4.9 m), screened 14 to 16 ft (4.3 to 4.9 m). DATUM.—Altitude of land-surface datum is 1,610 ft (491 m). Measuring point: Top of casing 2.40 ft (0.73 m) above land-surface datum. PERIOD OF RECORD.—May 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 1.78 ft (0.54 ra) below land-surface datum, Apr. 19, 1979; lowest, 6.80 ft (2.07 m) below land-surface datum, July 18, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 12 6.72 DEC 24 6.30 FEB 11 5.66 APR 28 5.09 JUN 22 5.13 AUQ 20 6.22 NOV 12 6.53 JAN 21 6.07 MAR 31 4.76 MAY 28 5.00 JUL 31 5.52 SEP 30 6.01 397 GROUND-WATER LEVELS

PIPESTONE COUNTY—Continued

440456096263201. Local number, 107N47W12CDC01. LOCATION.—Lat 44°04'56", long 96°26'32", in SW4SE4SW4 sec.12, T.107 N., R.47 W., Hydrologic Unit 10170203, 4.2 mi (6.8 km) northwest of Cazenovia. Owner: U.S. Geological Survey AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter li in (0.04 m), depth 16 ft (4.9 m), screened 14 to 16 ft (4.3 to 4.9 m). DATUM.—Altitude of land-surface datum is 1,600 ft (488 m). Measuring point: Top of casing, 3.90 ft (1.19 m) above land-surface datum. PERIOD OP RECORD.—May 1978 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 7-76 ft (2.37 m) below land-surface datum, May 8, 1979; lowest, 10.85 ft (3-31 m) below land-surface datura, July 18, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WAT LEVEL DATE LEVEL DATE LEVEL DATE LEV 10.41 MAR 27 8.04 JUN 22 9.68 AUG 20 9. 10.58 MAY 19 9.23 JUL 31 9.10

LU 2 o 1 1 1 i I 1 1 1 1

1 3 — — CO i 4 — —

3* 5 — — o mLU 6 — — t— LU LU 7 — — •z. 8 1 cr £ 9 V \-t 3 \ vvYi V\/ o 10 V— \A XA £ 11 LU Q 1 O 1 1 1 1 ! 1 ! I 1 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

107N47W12CDC01

POPE COUNTY

452940095414501. Local number, 123N40W04BDA01. LOCATION.—Lat 45°29'40", long 95°4l'45", in NE4SE4NW4 sec.4, T.123 N., R.40 W., Hydrologic Unit 07020005, east of Hancock. Owner: U.S. Geological Survey. AQUIFER.--Shallow buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation artesian well, diameter 14 in (0.03 m), depth 20 ft (6.1 m), screened 17 to 20 ft (5.2 to 6.1 m). DATUM.—Altitude of land-surface datum is 1,080 ft (329 m). Measuring point: Top of casing, 0.50 ft (0.15 m) above land-surface datum PERIOD OF RECORD.—December 1966 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 2.13 ft (0.65 m) below land-surface datum, July 27, 1972; lowest, 8.77 ft (2.67 m) below land-surface datum, Feb. 2, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 5.68 DEC 30 6.29 FEB 26 6.86 APR 30 4.93 JUN 30 5.72 AUG 31 6.20 DEC 1 5.92 JAN 29 6.67 MAR 31 5.68 MAY 28 5.10 JUL 30 6.16 SEP 29 5.80 00 CT -T) CT O x m DEPTH TO WATER. IN FEET BELOW LAND SURFACE O i-3 H 33

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O O ro cr\ 399 GROUND-WATER LEVELS

POPE COUNTY—Continued

453810095174501. Local number, 125N37W14DBB01. LOCATION.—Lat 45°38'10", long 95°17'45", in NW4NWJSE4 sec.14, T.125 N., R.37 W., Hydrologic Unit 07020005, 4 mi (6.4 km) east of Glenwood. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 m), depth 64 ft (19.5 m), screened 62 to 64 ft (18.9 to 19.5 m). DATUM.—Altitude of land-surface datum is 1,368 ft (417 m). Measuring point: Top of platform, 1.50 ft (0.46 m) above land-surface datum. PERIOD OP RECORD.—August 1966 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 35.10 ft (10.70 m) below land-surface datum, Feb. 9, 1973; lowest, 37.89 ft (11.55 m) below land-surface datum, Feb. 14, 1968.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 37.17 DEC 31 37.15 FEB 26 37-20 APR 30 36.49 JUN 30 36.69 AUG 31 37.38 DEC 1 37.09 JAN 29 37.17 MAR 31 36.94 MAY 28 36.50 JUL 30 36.45 SEP 29 37.10

454230095143001. Local number, 126N36W20BCC01. LOCATION.—Lat 45°42'30" J long 95°14'30", In SWJSW4NWJ sec.20, T.126 N., R.36 W., Hydrologic Unit 07010202, east of Villard. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 m), depth 17 ft (5.2 m), screened 14 to 17 ft (4.3 'to 5.2 m). DATUM.—Altitude of land-surface datum is 1,354 ft (413 m). Measuring point: Top of platform, 1.00 ft (0.30 m) above land-surface datum. PERIOD OF RECORD.—November 1966 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 3.84 ft (1.17 m) below land-surface datum, July 27, 1972; lowest, 10.10 ft (3.08 m) below land-surface datum, Oct 4, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 8.66 DEC 31 9.01 FEB 26 9.39 APR 30 7.85 JUN 30 7.65 AUG 31 8.35 DEC 1 8.82 JAN 29 9-21 MAR 31 8.73 MAY 28 7.56 JUL 30 7.78 SEP 29 8.14

1 I

10 11 I I I I I I I J__L 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

126N36W20BCC01 400 GROUND-WATER LEVELS

RAMSEY COUNTY

445648093053402. Local number-, 028N22W06ABD02. LOCATION.—Lat 44°56'48", long 93°05'34", in SE4NW4NEJ sec.6, T.28 N., R.22 W., Hydrologic Unit 07010206 at 55 East 5th Street, St. Paul. ' Owner: Northwestern National Bank. AQUIPEK.—Prairie du Chien Group of Early Ordovician Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled air conditioning artesian well, diameter 16 in (0.41 m), depth 355 ft (108 m) cased to 212 ft (64.6 m). ' DATUM.—Altitude of land-surface datum is 770 ft (235 m). Measuring point: Edge of vent pioe, 7.50 ft (2.29 m) below land-surface datum. * REMARKS.—Water level affected by pumping of nearby wells. PERIOD OF RECORD.—May 1971 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 56.00 ft (17-07 m) below land-surface datum, Apr. 5 1979- lowest, 134.0 ft (40.84 m) below land-surface datum, Aug. 16, 1972. '

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATS LEVEL DATE LEVEL DATE LEVEL NOV 2 59.70 JAN 4 75.25 MAR 1 71.20 MAY 3 80.70 SEP 7 74.30

445632093084901. Local number, 028N23W03ADD01. LOCATION.—Lat 44°56'32", long 93°08'49", in SE4SS4NE4 sec.3, T.28 N., R.23 W., Hydrologic Unit 07010206 at northwest corner of Lexington and Summit Avenues, St. Paul. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.--Bored observation water-table well, diameter U in (0.03 m), depth 96 ft (29.3 m), screened -?"^O;7OIt^e.O«OUO2y»3 rrc/* DATUM.—Altitude of land-surface datum is 920 ft (280 m). Measuring point: Top of casing, 4.00 ft (1.22 m) above land-surface datum. PERIOD OF RECORD.—August 1975 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 84.44 ft (25.74 m) below land-surface datum, Oct. 26, 1979 Jan. 22, 1980; lowest, 87.88 ft (26.79 m)'below land-surface datum, Oct. 25, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982

WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL NOV 2 85.79 MAY 3 85-52 SEP 7 85.26

80

81

82

83

84

85

~ 86

CE £ 87 < 3 i—o 88

^ 89 Q_ UJ Q 90 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

028N23W03ADD01 401 GROUND-WATER LEVELS

RAMSEY COUNTY—Continued

445955093011001. Local number, 029N22W14CAB01. LOCATION.—Lat 44°59'55", long 93°01'10", in NW4NE*SW$ sec.14, T.29 N., R.22 W., Hydrologic Unit 07010206, at Goodrich Golf Course. Owner: Ramsey County. AQUIFER.—Prairie du Chien Group of Early Ordovician Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in (0.30 m), depth 523 ft (159 m), cased to 303 ft (92.4 m). DATUM.—Altitude of land-surface datum is 969 ft (295 m). Measuring point: Edge of vent pipe, 2.50 ft (0.76 m) above land-surface datum. PERIOD OF RECORD.—May 1965, April 1966 to August 1966, August 1971, May 1980 to current year. EXTREMES FOR PERIOD OF RECORD.--Highest vmter level, 127.5 ft (38.86 m) below land-surface datum, Jan. 13, 1982; lowest, 140.6 ft (42.85 m) below land-surface datum, Apr. 6, 1966.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

NOV 5 130.2 JAN 13 127.5 MAR 11 128.7 MAY 11 130.1 SEP 14 129.4

445955093011002. Local number, 029N22W14CABO2. LOCATION.—Lat 44°59'55", long 93°01'10", in NW4NE4SW4 sec.14, T.29 N., R.22 W., Hydrologic Unit 07010206, at Goodrich Golf Course. Owner: U.S. Geological Survey AQUIFER.--Buried gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation artesian well, diameter 2 in (0.05 m), depth 81 ft (24.7 m), screened 78 to 81 ft (23.8 to 24.7 m). DATUM.—Altitude of land-surface datum is 970 ft (296 m). Measuring point: Top of casing, 1.30 ft (0.40 m) above land-surface datum. PERIOD OF RECORD.—October 1966 to August 1971, August 1977, June 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest rfater level, 34.98 ft (10.66 m) below land-surface datum, Oct. 31, 1980; lowest, 45.36 ft (13-83 m) below land-surface datum, June 3, 1968.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 36.70 JAN 13 37.20 MAY 11 37-30 SEP 14 37.12

445955093011003. Local number, 029N22W14CAB03. LOCATION.—Lat 44°59'55", long 93°01'10", in NWJNEJSWJ sec.14, T.29 N., R.22 W., Hydrologic Unit 07010206, at Goodrich Golf Course. Owner: U.S. Geological Survey AQUIFER.--Buried gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 In (0.05 m), depth 52 ft (15-8 m), screened 49 to 52 ft (14.9 to 15.8 m). DATUM.—Altitude of land-surface datum is 970 ft (256 m). Measuring point: Top of casing, 1.80 ft (0.55 m) above land-surface datum. PERIOD OF RECORD.—October 1966 to August 1971, June 1980 to current year. EXTREMES FOR PERIOD OF RECORD.--Highest water level, 15-36 ft (4.68 m) below land-surface datum, Oct. 31, 1980; lowest, 25.43 ft (7-75 m) below land-surface datum, June 3, 1968.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 18.32 JAN 13 18.82 MAY 11 18.76 SEP 14 18.34 02 GROUND-WATER LEVELS

RAMSEY COUNTY—Continued

450001093024701. Local number, 029N22W16ADD01. LOCATION.—Lat 45°00'01", long 93°02'47", in SE4SE4Nfi4 sec.l6, T.29 N., R.22 W., Hydrologic Unit 07010206, at 1955 English St. Owner: Maplewood Bowl. AQUIFER.--Buried sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 4 in (0.10 m), depth 163 ft (49-7 m), screened 158 to 163 ft (48.2 to 49-7 m). DATUM.—Altitude of land-surface datum is 900 ft (274 m). Measuring point: Top of well cap, 1.00 ft (0.30 m) above land-surface datum. PERIOD OP RECORD.—January 1981 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 70.70 ft (21.55 m) below land-surface datum, Jan. 12, 193l; lowest, 72.78 ft (22.18 m) below land-surface datum, Sept. 14, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 71.53 JAN 6 71.50 MAY 11 71.25 SEP 14 72.78

445918092590901. Local number, 029N22W24ADA01. LOCATION.—Lat 44°59'l8", long 92°59'09", in NE4SE4NE4 sec.24, T.29 N., R.22 W., Hydrologic Unit 07010206, at 1555 Century Avenue. Owner: Northern States Power Co., Maplewood Gas Plant. AQUIFER.—Jordan Sandstone of Late Ca-nbrlan Age. WELL CHARACTERISTICS.—Drilled fire protection artesian well, diameter 12 in (0.30 m), depth 523 ft (159 m), cased to 420 ft (128 m). DATUM—Land-surface datum is 996.5 ft (303.7 m) National Geodetic Vertical Datum of 1929. Measuring point: Edge of 2 in (0.05 m) breather pipe, 2.40 ft (0.73 m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OF RECORD.--August 1970 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 134.7 ft (41.10 m) below land-surface datum, Nov. 15, 1976; lowest, 151.0 ft (46.02 m) below land-surface datum, May 14, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 137.2 JAN 6 137-8 MAR 3 136.8 MAY 10 137-4 SEP 14 139-5

445700093051001. Local number, 029N22W31DDD01. i LOCATION.—Lat 44°57'00", long 93°05'10", in SE4SE4SE4 sec.31, T.29 N., R.22 W., Hytirologic Unit 07010206, at 26l East 5th Street, St. Paul. I Owner: Control Data Corp. AQUIFER.—Prairie du Chien Group of Early Ordovician Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 12 in (0.30 m), depth 298 ft (91 m), cased to 151 ft (46.0 m). DATUM.—Altitude of land-surface datum is 750 ft (229 m). Measuring point: Top of recorder platform, 9.00 ft (2.74 m) below land-surface datum. REMARKS.—Water level affected by pumping of nearby wells. PERIOD OF RECORD.—December 1971 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 29.07 ft (8.86 m) below land-surface datum, Apr. 15-16, 1979; lowest, 83-06 ft (25-32 m) below land-surface datum, Aug. 16, 1972.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 LOWEST VALUES DAY OCT NOV DEC JAN PEB MAR APR MAY JUN JUL AUG SEP 5 38.41 37.98 40.74 45.95 48.25 45.50 39-89 51-95 46.08 50.43 72.39 48.62 10 37.07 39-56 40.87 45.68 46.51 44.93 35.69 53.45 50.81 56.52 62.47 65.73 15 43.91 34.59 42.67 49-75 41.24 41.45 38.18 49-55 55-38 68.48 52.91 44.38 20 40.66 40.80 41.47 47.53 39-51 38.94 39.55 49-53 45-91 68.65 67.60 41.53 25 40.54 39.54 41.75 46.78 45.18 43.11 39.77 51.15 58.69 54.94 63.20 41.76 EOM 37.26 39.82 43.76 45.80 41.61 37-88 39-69 42.21 60.80 53.85 61.32 53-36 WTR YEAR 1982 HIGHEST 29-56 APR 12, 1982 LOWEST 72.39 AUG 5, 1982 403 GROUND-WATER LEVELS

RAMSEY COUNTY—Continued

450026093084201. Local number, 029M23W11CCC01. LOCATION.—Lat 45°00'26", long 93°03'42", in SW4SWJSW4 sec.11, T.29 N., R.23 W., Hydrologic Unit 07010206, at 2204 North Lexington Avenue, Roseville. Owner: Lexington Court Apartments. AQUIFER.—St. Peter Sandstone of Middle Ordovician Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 6 in (0.15 m), depth 325 ft (99.1 ra), cased to 192 ft (58.5 m). DATUM.—Altutude of land-surface datum is 945 ft (288 ra). Measuring point: Top of well cap, 1.40 ft (0.43 m) above land-surface datura. PERIOD OF RECORD.—January 1971 to current year. EXTREMES FOR PSRIOD OF RECORD.—Highest water level, 107-5 ft (32.77 ra) below land-surface datura, Mar. 4 1974; lowest, 111.2 ft (33.89 m) below land-surface datum, Aug. 18, 1975.

WATER LEVEL, IN FEET BSLOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 110.1 JAN 8 110.0 MAR 3 110.1 MAY 10 110.2 SEP 8

445751093072301. Local number, 029N23W25CCD01. LOCATION.—Lat 44°57'51", long 93°07'23", SEJSWJSWJ sec.25, T.29 N., R.23 W., Hydrologic Unit 07010206, at 760 North Dale Street, St. Paul. Owner: Burlington Northern, Inc., Dale Street Shops. AQUIFER.--Hinckley Sandstone of Precambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 8 in (0.20 m), depth 999 ft (304 n), cased to 955 ft (291 ra). DATUM.—Land-surface datum is 859.5 ft (262.0 m) National Geodetic Vertical Datura of 1929. Measuring point: Top of recorder floor, 4.60 ft (1.40 m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OF RECORD.—December 1970, November 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 161.0 ft (49-07 ra) below land-surface datura, May 10, 1980; lowest, 205-0 ft (62.48 ra) below land-surface datura, Dec. 15, 1970.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 LOWEST VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUO SEP 5 171-6 172.5 172.6 170.9 170.9 169.6 169.8 169.4 170.3 170.6 173.7 177.2 10 172.3 172.8 172.7 171.9 170.2 169.4 169.5 169.3 170.3 170.9 173.9 177.4 15 172.5 172.7 172.4 171.4 169-7 169.4 169-1 170.0 171.2 174.6 1(0*31 "7 Q O 20 172.6 172.7 173.1 171.4 169.6 169.6 168.2 170.2 171.6 175.5 170.31 *7 Q O 25 172.5 172.5 172.6 170.9 170.0 169.8 168.0 169.9 170.7 172.3 175.8 178.9 EOM 172.8 172.3 171.8 171.1 169.6 169.6 169.9 170.8 17^.0 176.4 179.0 WTR YEAR 1982 HIGHEST 168.9 MAY 4, 1982 LOWEST 179.0 SEP 30, 1982

160

165

170

175

180

185

190

195

200

205

210 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

029N23W25CCD01 404

RAMSEY COUNTY--Continued

445739093081201. Local number, 029N23W35BAD01. LOCATION.—Lat 44°57'39", long 93°03'12", in SE4NE4NW4 sec.35, T.29 N., R.23 W., Hydrologic Unit 07010206, Victoria St., 0.35 mi (0.56 km) north of University Ave. Owner: City of St. Paul. AQUIFER.--St. Peter Sandstone of Middle Ordovician Age. WELL CHARACTERISTICS.—Drilled unused water-table well, diameter 16 in (0.41 m), depth 23*4 ft (71.3 m), screened 174 to 234 ft (53.0 to 71.3 m). DATUM.—Altitude of land-surface datum is 888 ft (26l m). Measuring point: Top of coupling, 0.50 ft (0.15 m) above land-surface datum. PERIOD OP RECORD.—May 1981 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 124.0 ft (37.80 m) below land-surface datum, Sept. 7, 1982; lowest, 133.0 ft (40.54 m) below land-surface datum, May 5, 1981.

WATER LEVEL, IN PEST BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 128.4 OCT 28 127-9 JAN 5 MAR 2 125-3 MAY 3 124.4 SEP 7 124.0

450414093012701. Local number, 030N22W23CB301. LOCATION.—Lat 45°04'14", long 93°01'27", in NW4NWJSW4 sec.23, T.30 N., R.22 W., Hydrologic Unit 07010206, Hoffman Road, 0.85 mi (1.4 km) southwest of Highway 61. Owner: White Bear Town Hall. AQUIFEri .--Buried sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 4 in (0.10 m), depth 96 ft (29.3 m), screened 91 to 96 ft (27.7 to 29.3 m). DATUM.—Altitude of land-surface datum is 928 ft (283 m). Measuring point: Top of casing, 1.00 ft (0.30 m) above land-surface datum. PERIOD OP RECORD.—April 1980 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 20.73 ft (6.32 m) below land-surface datum, Apr. 10, 1980; lowest, 22.80 ft (6.95 m) below land-surface datum, Sept. 8, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL 21.50 JAN 13 21.72 MAR 3 22.04 MAY 10 21.22 22. £

450723093071801. Local number, 030N23W01BAB01. LOCATION.--Lat 45°07'23", long 93°07'l8", in NW4NE4NW4 sec.l, T.30 N., R.23 W., Hydrplogic Unit 07010206, at Bucher Playground. Owner: City of Shoreview. AQUIFER. — Prairie du Chien Group of Early Ordovician Age. WELL CHARACTERISTICS.—Drilled recreation artesian well, diameter 8 in (0.20 m), depth 155 ft (47.2 m), cased to 101 ft (30.8 m). DATUM.—Altitude of land-surface datum is 900 ft (274 m). Measuring point: Top of breather pipe, 2.40 ft (0.73 m) above land-surface datum. PERIOD OF RECORD.—August 1970 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 22.47 ft (6.85 m) below land-surface datum, Apr. 19, 1976; lowest, 30.35 ft (9.25 m) below land-surface datum, Sept. 8, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 5 26.37 JAN 13 26.82 MAR 11 26.99 MAY 10 26.04 SEP 8 30.35 405 GROUND-WATER LEVELS

RAMSEY COUNTY--Continued

1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

030N23W01BAB01

45023^093082501. Local number, 030N23W35BDC01. LOCATION.—Lat 45°02'38", long 93°08'25", in SWiSSiNWj sec.35, T.30 N., R.23 W., Hydrologic Unit 07010206, southeast corner of Arbogast Street and Richmond Avenue. Owner: City of Shoreview. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 12 in (0.30 m), depth 510 ft (155 m), cased to 465 ft (142 m). OATU-1.—Altitude of land-surface datum is 960 ft (293 m). Measuring point: Hole in shelter floor, 1.50 ft (0.46 m) above land-surface datum. PERIOD OF RECORD.—April 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 134.7 ft (41.06 m) below land-surface datum, Apr. 9, 1980; lowest, 145.9 ft (44.47 m) below land-surface datum, Aug. 21, 1982.

WATER LEVEL, FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 LOWEST VALUES DAY NOV JAM FEU MAR APR MAY JUN JUL AUG SEP 5 137.1 136.8 138.4 137.8 138.6 138.6 136.5 137.2 137.4 140.3 142.6 140.4 10 137.2 136.6 138.3 138.5 138.2 138.3 136.2 136.7 137.8 142.6 142.2 140.1 15 137.2 137.8 137.9 138.4 138.0 138.4 136.0 137.7 139-6 142.8 141.8 140.7 20 137.0 138.2 138.3 138.4 138.5 138.4 136.2 137.6 140.0 143.1 145.9 140.1 25 136.2 138.0 138.3 138.4 138.9 138.6 136.1 136.8 143.5 145.4 140.2 EOM 136.9 137.6 137.9 138.6 138.4 137.0 136.8 136.9 140.3 141.4 140.4 140.4 WTR YEAR 1982 HIGHEST 135.2 APR 12, 1982 LOWEST 145.9 AUG 21, 1982

REDWOOD COUNTY

441513095183001. Local number, 109N37W09CCC01. LOCATION.—Lat 44°15'13", long 95°18'30", in SW4SWJSWJ sec.9, T.109 N., R.37 W., Hydrologic Unit 07020008, 3 mi (4.8 km) northwest of Lamberton. Owner: U.S. Geological Survey AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1J in (0.04 m), depth 19 ft (5.8 m), screened 17 to 19 ft (5.2 to 5.8 m). DATUM.—Altitude of land-surface datum is 1,065 ft (325 m). Measuring point: Top of casing, 3.70 ft (1.13 m) above land-surface datum. PERIOD OF RECORD.—October 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 7.52 ft (2.29 m) below land-surface datum, June 21, 1982; lowest, 17.03 ft (5.19 m) below land-surface datum, Oct. 20, 1978.

WATER LEVEL, IN FEET BELOW LAND-SUPFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 29 15.39 DEC 29 15.30 FEB 12 15.93 APR 27 12.72 JUN 21 7.52 AUG 21 14.84 DEC 5 15-35 JAN 8 15.35 MAR 31 10.42 MAY 29 11.80 JUL 31 14.86 SEP 30 14.98 406

REDWOOD COUNTY—Continued

441323095280701. Local number, 109N38W30BBD01. LOCATION.—Lat 44°13'23", long 95°28'07", in SEiNW4N«"4 sec.30, T.109 N., R-38 W., Hydrologic Unit 0702000.3, at City of Walnut Grove. Owner: Plum Creek Cheese Co. AQUIFER.--Sandstone of Cretaceous Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 5 in (0.13 m), depth 240 ft (73-2 m), casing depth not available. DATUM.—Altitude of land-surface datum is 1,218 ft (371 m). Pleasuring point: Top of recorler floor, 1.80 ft (0.55 m) above land-surface datum. PERIOD OP RECORD.—August 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest crater level, 24.65 ft (7.51 ra) below land-surface datum, lar. 13, 14, Apr. 23, May 8, 9, 1978; lowest, 25.77 ft (.7.35 ra) below land-surface datum, Sept. 29, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER '/EAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 17 25.67 JAN 27 25.31 APR 7 25.41 MA? 20 25-30 AUG 9 25-49

442027095341401. Local number, 110N39W17AAA01. LOCATION.—Lat 44°20 I 27", long 95°34'l4", in MEiNSJNSJ sec.17, T.110 M., R.39 W., Hydrologic Unit 07020003, 5 ni (8.1 km) south of Milroy. Owner: U.S. Geological Survey AQUIFER.--Buried sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation wat-jr-table well, diameter li in (0.04 m), depth 15 ft (4.6 m), screened 13 to 15 ft (4.0 to 4.6 m). DATUM.—Altitude of land-surface datum is 1,110 ft (338 m). Measuring point: Top of casing, 0.10 ft (0.03 m) above land-surface datum. PERIOD OF RECORD.—October 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 2.51 ft (0.77 m) below land-surface datum, Mar. 24, 1979; lowest, 8.96 ft (2.73 m) below land-surface datum, Sept. 30, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982 WATER WATER WATER WATER iVATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL LEVEL OCT 29 8.43 DEC 29 8.35 APR 27 5.08 JUN 21 5.69 AUG 27 8.07 7.91 DEC 5 8.42 MAR 31 4.04 MAY 29 5-90 JUL 31 7-13

443051095074201. Local number, 112N36W14AAA01. LOCATION.—Lat 44°30'51", long 95°07'42", in NE^NEJNEJ sec.14, T.112 N., R.36 W., Hydrologic Unit 07020007, 2 mi (3.2 km) south of Redwood Falls. Owner: Frank Boots. AQUIFER.—Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused arteaian well, diameter 4 in (0.10 m), measured depth 214 ft (65.2 m), reported screened 213 to 218 ft (64.9 to 66.4 m). DATUM.—Land-surface datum is 1,038.9 ft (316.7 m) National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 2.00 ft (0.6l m) above land-surface datum. REMARKS.—Measured weekly by Kenneth Daby. Water level affected by regional pumping. PERIOD OF RECORD.—July 1952 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 30.72 ft (9.36 m) below land-surface datum, Sept. 10, 1953; lowest, 44.68 ft (13.62 m) below land-surface datum, July 16, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 19|8l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 7 40.56 DEC 9 38.67 FEB 10 38.76 APR 14 39-06 JUN 15 39.52 AUG 11 40.58 14 40.47 16 38.61 17 38.93 21 38.84 23 39.69 18 40.71 21 40.29 23 38.59 24 39-09 28 39-23 30 39-46 26 40.54 28 40.07 30 38.55 MAR 3 39-07 MAY 5 39.18 JUL 7 39-85 SEP 1 40.09 NOV 4 40.05 JAN 6 38.53 10 39.01 12 39-01 14 39-66 8 40.12 12 39.58 13 38.50 17 39-02 19 39-09 21 39-63 15 40.03 18 39.11 20 38.56 24 39-10 26 39-55 27 39.94 22 39-92 25 38.79 27 38.71 31 39-26 JUN 2 39-37 AUG 4 40.25 29 39.83 DEC 2 38.72 FEB 3 38.79 APR 7 39-33 9 39-14 407 GROUND-WATER LEVELS

REDWOOD COUNTY—Continued

1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 uj 26 o < i r U. 9= 28 CO g 30 < -c 32 o _j m 34 i — UJ uj 36 z ~ 38

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46 I I I I I I I I 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

112N36W14AAA01 442906095064101. Local number, 112N36W24DDC01. LOCATION.—Lat 44°29'06", long 95°06'41", In SW4SEJSEJ sec.24, T.112 N., R.36 W., Hydrologlc Unit 07020007, 3-6 ml (5.8 km) south of Redwood Palls. Owner: City of Redwood Palls. AQUIPER.—Burled sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 2 In (0.05 m), depth 144 ft (43.9 m), screened 141 to 144 ft (43.0 to 43.9 m). DATUM.—Altitude of land-surface datura Is 1,041 ft (317 m). Measuring point: Top of casing, 2.50 ft (0.76 m) above land-surface datum. REMARKS.—Water level affected by pumping from nearby well field. PERIOD OP RECORD.—December 1967 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 39-52 ft (12.05 m) below land-surface datum, Mar. 13, 1971; lowest, 52.21 ft (15.6l m) below land-surface datum, July 16, 1977. WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL LEVEL OCT 7 45.97 DEC 43.49 PEB 10 44.48 APR 14 43.98 JUN 15 45.31 AUG 11 46.19 14 45.63 43.48 17 44.48 21 43.63 23 45.45 18 46.32 21 45.39 43.48 24 44.45 28 44.52 30 44.78 26 46.18 28 44.93 43.46 MAR 3 44.46 MAY 5 44.23 JUL 7 45.08 SEP 1 45.79 NOV 4 45.48 JAN 43.45 10 44.50 12 44.00 14 45.28 8 45.35 12 44.44 44.07 17 44.47 19 44.39 21 44.87 15 45.13 18 43.83 43.93 24 44.41 26 46.04 27 45.41 22 44.96 25 43.49 43.57 31 44.26 JUN 2 44.44 AUO 4 46.69 29 44.89 DEC 2 43.52 PEB 44.10 APR 7 44.19 9 44.26 o o M O c- -& O -Cr O H o ix> x 3> vo

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I-1 t-1 IT'S. O3-Pc-t--^OWT--^IOO H- M fflj^ t-1 j; P3 3 i-» r-jp.. [71 ui • . <^ H3 r~ OQict'-ic1!^ 3P ^-3 o>oo piH __, .•-ooiCct^'-ii Octo OO-Cr IT'33 *; l—• p3 33 Ca O. Mt-^GT 1— ' S 1—> 33Of; fI>'—-WO. ct-Cr. ^2 ^H'T J^hiH-W3*-Cr ~ ^oi^o*!— iP-n>o *3 O — a O CO C2 CO 33 ct a i s> ^ CT\ o i-1 Pror1 M M O f fD i-1 ct r - O ^jo ,_ , Oo Oj^wCa vo O ro O o HIM a t-, ^--OO'Dr-'Ct.CaCDcT-.O CD O ;> P O Ul P i-3 5 *l P O O3O 3> ^i 4r->T]ct JDOIPO l-> p) rri i-1 O 0- 3 1 3 f— ' O ro H i 2 >-3 5 • OQ-3 1 3 h-' O ~g i—' r1 i CD QJ O M i—'ru ra 2 oj3Jo"Pa'jicd&o ti> ;3 Ul^O M fD ct | . O CR - 3 ••3 fD (-*. < rovo J- OHfDcti.o c» -3 3 ™ *" c. TCcaroTPH-w c i—* v-'O !-• M fs; „ o".~q p-oc« OOT-J o cy T co • rut^ KJ> .^ (1>|~g o CTTCOT » 0 1 "^ fD co P C DEPTH TO WATER. IN FEET BELOW LAND SURFACE ro oo p] M M 'Jl K-1 • • < Ol-1 OJOO CT33 ^ ^H-O a TfD<* O*~ ' CD MOT p) < M n> ru ro p •=< /i-^ojro — oiooo-soic rn (jqPro Ir1 3 fl> c ct 0 -U) i ^Mrroctju^cos O 3 H- 1) u-i co ,^, D ca ^ 3 H* "-^ oo ^3 3, ^ aS 1 ct >•} 0 oo as III! a co o> H- 3 TJ = ro 3=3 ^ &CTT o ~-ia; 33 CD C * 3 co I-1 H3^a "^ 1 fl>H-3tl =ro ir1 33333=- _ caa;3co M <•>-' h3 "3 P ct 5 fl> 03 !-^ CT f-3 £ C p ct 35 fD 0 OO M i?] t— i P H- H- 03 z: r^l-OKi S T ct t-'JBH- H"O M ro P (D ^ *• Ct CO 3 O a O T fl> — -si-1 £z TfD 1^- crca 3 c. i or~ f6 ct O i P -3 ro o CD ct o Co 0) P} T 0 CO I-- I-1 T 0 1 0 5' rn OP.-OTO 00^ 33 C r!: fDr-'Toio s.. H 33 tt CD • ct fl> P 3 o _ _ S fD • CT CD *H O 4=- ON |-'c-'35^; &<; ^!D3 w 35 M > S ct fD ct i-cy1 _5; PCD crcrfD s: o O e M ••<5H^ ctp-1 i— *»- O -fr O »3 " fD > •z IT1 33 in Ul ~J i?o H y C- ^fD> CO O OO •°-s. Ul-e-,T33 1?] 3 (^ Qq g; a Co • ^ CD • — -VD l-> % CD ff O 1-3 fD ON h-' ca ^ ^ fD • 0 3 I—1 g 3U1 i-- CO G 3 > G ct 2 P Ul 3 !-• fD 3 3 Q c-i 3 ^T x^-- o i-3 O . . i-< 33 ct O. ro G 3= 0 J3" • i-t) • K; l-> H- ^3 i-< J= ct a. ro 1 S3 ro ro M -T '-a ,- t-1 H- »-" | 3 P rorow 5 r---- 3P • o H-\D S " ro CD 3 0 3 P fD r3 3

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RENVILLE COUNTY

444437094425001. Local number, 115N32W29AACO1. LOCATION.—Lat 44°44'37", long 94°42'50", in SW4NB4NE4 sec.29, T.I15 N., R.32 W., Hydrologic Unit 07010205, in elector. Owner: Hector Creamery. AQO[PER.--Sandstone of Cretaceous Age. WELL, CHARACTERISTICS.—Drilled unused artesian well, diameter 8 in (0.20 m), depth 370 ft (109 ra), screened 360 to 370 ft (110 to 113 m). DATJ.'I.—Altitude of land-surface datum is 1,080 ft (329 m). Measuring point: Top of casing, 1.50 ft (0.46 m) above land-surface datum. PERIOD OP RECORD.—March 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest crater level, 32.32 ft (9.85 m) below land-surface datum, June 14, 1982; lowest, 38.48 ft (11.73 m) below land-surface datum, Oct. 24, 1978.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1932 WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL 33.82 JAN 27 33.20 MAR 29 32.70 JUN 14 32.32

RICE COUNTY

441912093162901. Local number, 110N2CW19BDC01. LOCATION.—Lat 44°19'12", long 93°l6'29", in SWiSEiNWi sec.19, T.110 N., R.20 W., Hydrologic Unit 07040002, just north of Paribault. Owner: St. Lawrence Cemetery Assn. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 4 in (0.10 m), depth 400 ft (122 m), cased to 357 ft (110 m). DATUM.—Altitude of land-surface datum is 985 ft (300 m). Measuring point: Top of casing, 1.60 ft (0.49 m) above land-surface datum. PERIOD OF RECORD.—June 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest *ater level, 7.60 ft (2.32 m) below land-surface datum, Dec. 10, 1979; lowest, 10.94 ft (3.33 TI) below land-surface datum, July 10, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 4 8.88 JAN 12 9-13 MAR 4 8.80 MAY 12 8.50 SEP 13

442543093113701. Local number, 111N20W11CDC01. LOCATION.—Lat 44°25'43", long 93°11'37", in SWiSEjSWi sec.11, T.lll N., R.20 W., Hydrologic Unit 07040002, Highway 218 at Dundas. Owner: Rollie Green. AQUIFER.—Prairie du Chien Group of Lower Ordovician Age. WELL CHARACTERISTICS.—Drilled commercial artesian well, diameter 4 in (0.10 m), depth 158 ft (48.2 m), cased to 101 ft (30.8 m). DATUM.—Altitude of land-surface datum is 950 ft (290 m). Measuring point: Top of casing, 2.00 ft (0.61 m) above land-surface datum. PERIOD OP RECORD.—October 1980 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 25.72 ft (7.84 n) below land-surface datum, May 4, 1982; lowest, 26.92 ft (8.21 m) below land-surface datum, Mar. 12, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 4 26.82 JAN 12 27.24 MAR 4 27.22 MAY 4 25.72 SEP 13 25.82 tr-e- IT •£=• x PJ Ot-*> O -t 1-3 35 OUi o ro O FJ O o" 3 ro ^d cr\i-rii-J 35 3 G O • O W • nui CD KI <|ct;r,33O-c-oo

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CT\O ir 33 Ill GROUND-WATER LEVELS

ROCK COUNTY--Continued

133843096184701. Local number, 102N46W14AAAO1. LOCATION.—Lat 43°38'43", long 96°l8'47", In NE4NE4NE4 sec.14, T.102 N., R.46 W., Hydrologic Unit 10170203, 4.5 mi (7.2 km) west of Luverne. Owner: U.S. Geological Survey AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter U in (0.04 m), depth 14 ft (4.3 m), screened 12 to 14 ft (3-7 to 4.3 m). DATUM.—Altitude of land-surface datum is 1,450 ft (442 m). Measuring point: Top of casing, 1.65 ft (0.50 m) above land-surface datum. PERIOD OP RECORD.—May 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 3-20 ft (0.98 m) below land-surface datum, Apr. 19, 1979; lowest, 9.01 ft (2.75 m) below land-surface datum, Oct. 12, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 12 9.01 DEC 24 8.69 FEB 11 8.75 APR 28 6.36 JUN 22 6.40 AUG 20 7.06 NOV 12 8.78 JAN 21 8.97 MAR 27 5-37 MAY 31 6.17 JUL 31 6.40

434726096073201. Local number, 104N44W21CDC01. LOCATION.—Lat 43°47'26", long 96°07'32", in SW4SE4SW4 sec.21, T.104 N., R.44 W., Hydrologic Unit 10170204, 3.8 mi (6.1 km) northeast of Hardwick. Owner: U.S. Geological Survey AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1J in (0.04 m), depth 16 ft (4.9 m), screened 14 to 16 ft (4.3 to 4.9 m). DATUM.—Altitude of land-surface datum is 1,510 ft (460 m). Measuring point: Top of casing, 3-70 ft (1,13 m) above land-surface datum. PERIOD OF RECORD.—May 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 4.90 ft (1.49 m) below land-surface datum, Apr. 19, 1979; lowest, 9.96 ft (3.04 m) below land-surface datum, June 15, 197.9.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 12 7.84 DEC 1 7.58 FEB 11 7.64 APR 28 7.12 JUN 22 7.22 AUG 20 7.24 NOV 12 7-72 JAN 21 7.63 MAR 27 6.33 MAY 31 6.13 JUL 31 7.47

SCOTT COUNTY

443732093460301. Local number, 113-N24W06BCBO1. LOCATION.—Lat 44°37'32", long 93°46'03", in NW4SW4NW4 sec.6, T.113 N., R.24 W., Hydrologic Unit 07020012, in Belle Plaine. Owner: Creative Tool and Engineering. Formerly Belle Plaine Coop Creamery. AQUIFER.--Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused water-table well, diameter 12 in (0.30 m), depth 272 ft (82.9 m), screen information not available. DATUM.—Altitude of land-surface datum is 840 ft (256 m). Measuring point: Top of well cap, 2.30 ft (0.70 m) above land-surface datum. PERIOD OF RECORD.—July 1973 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest *ater level, 118.1 ft (36.00 m) below land-surface datum, Aug. 27, 1979; lowest, 144.0 ft (43.89 m) below land-surface datum, July 9, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER !}>ATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL 00T 16 129.1 JAN 15 119-9 MAR 31 118.8 APR 30 118.6 JUN 30 126.2 AUG 23 122.7 D$C 4 136.2 412 GROUND-WATER LEVELS

SCOTT COUNTY

LU 115 o <: I I u. •3 ] 18 co g 121 < 3 124 o £ 127

LU UJ 1 30 u.

~ 133 cc ,_LU 1, 36-!(• < 3 o 139 i—

^ 142 Q_ Ld O 145 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

113N24W06BCB01

443352093423001. Local number, 113N24W28DAA01. LOCATION.—Lat 44°33'52", long 93 0i»2'30", in NE4NE4SEJ sec.28, T.113 N., R.24 W., Hydrologic Unit 07020012, at Michelle Wildlife Area. Owner: U.S. Geological Survey. AQUIFER.—Ironton-Galesville Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 6 in (0.15 m), depth 450 ft (137 m), cased to 219 ft (66.8 m). DATUM.—Altitude of land-surface datum is 990 ft (302 m). Measuring point: Top of well seal, 2.30 ft (0.70 m) above land-surface datum. PERIOD OF RECORD.—August 1981 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 132.2 ft (40.29 m) below land-surface datum, Sept. 13, 1982; lowest, 132.7 ft (40.45 m) below land-surface datum, Aug. 19, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 132.3 JAN 12 132.6 APR 1 132.4 MAY 4 132.2 SEP 13 132.2

443352093423002. Local number, 113N24W28DAA02. LOCATION.—Lat 44°33'52", long 93°42'30", in NEJNE4SE4 sec.28, T.113 N., R.24 W., Hydrologic Unit 07020012, at Michelle Wildlife Area. Owner: U.S. Geological Survey. AQUIFER.—Mount Simon Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 2 in (0.05 m), deptph 655 ft (200 m), screened 650 to 655 ft (198 to 200 m). DATUM.—Altitude of land-surface datum is 990 ft (302 m). Measuring point: Top of casing, 3-00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—August 1981 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 221.2 ft (67.42 m) below land-surface datum, May 4, 1982; lowest, 222.0 ft (67.67 m) below land-surface datum, Sept. 3, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 221.5 JAN 12 221.3 APR 1 221.4 MAY 4 221.2 SEP 13 222.0 GROUND-WATER LEVELS

SCOTT COUNTY--Gontinued

44B715093480801. Local number, 113N25W02CAC01. LOPATI3M.--Lat 44°37'15", long 93°48'08", in SWJNEjSWi sec.2, T.113 N., R.25 W., Hydrologic Unit 07020012, 0.75 mi (1.21 km) west of Belle Plaine at Shep's Gravel Pit. Owner: U.S. Geological Survey. A«3|JIFER.— Ironton-Galesville Sandstone of Late Cambrian Age. WE|LL CHARACTERISTICS.—Drilled observation artesian well, diameter 4 in (0.04 m), depth 323 ft (98.4 m), cased to 193 ft (58.8 m). DATUM.—Altitude of land-surface datum is 750 ft (229 m). Measuring point: Top of casing, 0.25 ft (0.08 m) above ] land-surface datum. PihlOD OP RECORD.—October 1979 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest crater level, 8.07 ft (2.46 m) below land-surface datum, June 18, 1930; lowest, 10.35 ft (3.15 m) below land-surface datum, Jan. 8, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OGT 30 9-34 APR 1 8.19 MAY 17 8.19 SEP 13 9.47

4414025093220801. Local number, 114N21W20BAA01. LOJCATION.—Lat 44°40'25", long 93°22'08", in NE4NEJNW4 sec.20, T.114 N., R.21 W., Hydrologic Unit 07020012, 0.5 mi (0.8 km) east of Credit River. Owner: Credit River Town Hall. AQlJIFER.--Buried sand of Pleistocene Age. rfEJLL CHARACTERISTICS.—Drilled domestic artesian well, diameter 4 in (0.10 m), depth 98 ft (29.9 m), screened 93 to 98 ft (28.4 to 29-9 m). DA|TU;4.—Altitude of land-surface datum is 946 ft (288 m). Measuring point: Top of casing, 1.10 ft (0.34 m) above land-surface datum. PERIOD OF RECORD.—September 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 39.02 ft (11.89 m) below land-surface datum, Mar. 3, 1980; lowest, 40.72 ft (12.41 m) below land-surface datum, July 16, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 //ATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 39.70 JAN 7 40.13 MAR 4 39-52 MAY 4 39-32 SEP 10 39-80

443752093254401. Local number, 114N22W35DCC01. LOCATION.—Lat 44°37'52", long 93°25'44", in SWJSW4SE4 sec.35, T.114 N., R.22 W., Hydrologic Unit 07020012, southwest of Credit River. Owner: St. Catherine's Church. AQUIFER.—Prairie du Chien Group of Early Ordovician Age. W$LL CHARACTERISTICS.—Drilled domestic artesian well, diameter 4 in (0.10 m), depth 235 ft (71.6 m), cased to 194 ft (59-1 m). UM.—Altitude of land-surface datum is 1,015 ft (309 m). Measuring point: Top of casing, 1.20 ft (0.37 m) . above land-surface datum. PERIOD OF RECORD.—September 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest rfater level, 89.18 ft (27.21 m) below land-surface datum, Sept. 10, 1982; lowest, 90.30 ft (27-52 m) below land-surface datum, Sept. 6, 1979-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 89.86 JAN 7 90.04 MAR 4 89.80 MAY 4 89.63 SEP 10 89.18 W T3 > tv£j O -t K^ P, Hj t-1 C O -Cr ^-3 3; c: H-> f I—i co *=• —j 2S vo *ij P t-j ro O trJ < t-t O I ct 3; 3) O P> O O i o j> • s, cm a vx> O". O I I Oj S> • S> 3, I 3 G • Uj M ru > i o> i ru j> i a. r1- i r\j ct (-• O 00 T P I -c CT OO I 3 CO --^ c -

hJj C 12 H- OT O

• & p 1 M (fi 1 Ct 01 O - DEPTH TO WATER. IN FEET BELOW LAND SURFACE cr a> w • cr i -j -j w H- c a> i >-• LO o "o 0) TO 1 M K o a; c T ct < O H- ct ui cr < O 01 s; ffi o ^ H- i— P O t< 3- rt D H- CT CD • I—' CD O H- 3 P a c O 0) 3 en ru ro TO o> r\) vji C ro o 'd o 'O P ui f-ti M 3 CT^ O" 3 T -_^ CT P H- •DTP ct a

C * 3 - oo

r\) oooo p] O -Cr p O. >-• CT\3

IT1 S pa "f < ^ pj FJ 415

SCOTT COUNTY—Continued

444^42093351001. Local number, 115N23W28AACO1. LOCATION.— Lat 44°44'42", long 93°35'10", in SW4MS4NE4 sec.28, T.11'5 M., R.23 W. , Hydrologic Unit 07020012, 2.75 mi (J6.03 km) south of Shakopee. Owner: Leonard Granzow. AQUIFER.—Jordan Sandstone of Late Canbrian Age. WELIL CHARACTERISTICS.—Drilled irrigation artesian well, dia-neter 8 in (0.20 m), deptn 150 ft (45.7 m), cased to 116 ft (35.4 ra). DATljJM.—Altitude of land-surface datum is 801 ft (244 m). Measuring point: Top of casing, 0.40 ft (0.12 m) aoove land-surface datura. PERjOD OP RECORD.—April 1979 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 84.76 ft (25.83 TI) below land-surface datum, Apr. 16, 1980; lowest, 87.98 ft (26.82 m) below land-surface datum, Mar. 8, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTE'lBErt 1932 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 87.36 MAR 8 87.98 APR 1 87.17 MAY 17 86.63 SEP 13 ,.62

SUERBURUii COUNT?

451954093424801. Local number, 033N27W21CCA01. LOCATION.—Lat 45°19'54", long 93°42'48", in NEJSWJSW* sec.21, T.33 N., R.27 W., Hydrologic Unit 07010203, on Bromeling farm, 0.9 mi (1.4 km) east of Big Lake. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 m), depth 20 ft (6.1 m), screened 18 to 20 ft (5.5 to 6.1 m). DATUM.—Altitude of land-surface datum is 933.8 ft (284.6 m) National Geodetic Vertical Datum of 1929- Measuring point: Top of casing, 3.60 ft (1.10 m) above land-surface datum. PERIOD OP RECORD.—October 1969 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 9-03 ft (2.75 m) below land-surface datum, Nov. 27, 1973; lowest, 14.43 ft (4.40 m) below land-surface datum, Aug. 25, 1977.

WATER LEtfSL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 12.95 FEB 18 13.75 APR 6 13.00 JUN 2 12.44 AUG 4 13.15 SEP 9 13.20 DEC 1 13.17 MAR 10 13.90 MAY 13 12.52 JUL 9 12.53

451852093435301. Local number, 033N27W29CDC01. LOCATION.—Lat 45°l8'52", long 93°43'53", in SWJSEiSWJ sec.29, T.33 N., R.27 W., Hydrologic Unit 07010203, southeast of Big Lake. Owner: Truman (Pete) Sanford. AQUIFER.—Mount Simon Sandstone of Late Cambrian Age and Hinckley Sandstone of Late Precambrian Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in (0.30 m), depth 218 ft (66.4 m), cased to 92 ft (28.0 m). DATUM.—Altitude of land-surface datura is 931 ft (284 ra). Measuring point: Top of casing, 0.50 ft (0.15 m) above land-surface datum. REMARKS.—Water level affected by pumping of nearby wells. PERIOD OF RECORD.--September, November 1973, October 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 9.48 ft (2.89 m) below land-surface datum, June 29, 1979; lowest, 21.00 ft (6.40 m) below land-surface datum, Aug. 4, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 14.04 FEB 18 14.35 APR 6 13.55 JUN 2 12.45 AUG 4 21.00 SEP 9 13.97 DEC 1 13.74 MAR 10 14.47 MAY 13 12.46 JUL 14 18.00 GROUND-WATER LEVELS

SHERBURNE COUNTY—Continued

6

8

10

12

14

16

18

20 |—

22

24 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

033N27W29CDC01

452638093442001. Local number, 034N27W18AAB01. LOCATION.—Lat 45°26'38", long 93°44'20", in NWiNEJNEJ sec.18, T.34 N., R.27 W. , Hydrologic Unit 07010203, in Orrock, 0.15 mi (0.24 km) west of County Road 5. Owner: Morton Arneson. AQUIFER.—Buried gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in (0.30 m), depth 115 ft (35.0 m), screened 95 to 115 ft (29.0 to 35.0 m). DATUM.—Altitude of land-surface datum is 985 ft (300 m). Measuring point: Top of casing, 0.40 ft (0.12 m) above land-surface datum. PERIOD OP RECORD.—December 1979 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 11.92 ft (3.63 m) below land-surface datum, June 2, 1982; lowest, 13.71 ft (4.18 m) below land-surface datum, Mar. 9, 1981. I

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 13.07 APR 5 12.22 JUN 2 11.92 JUL 7 12.58 AUG 4 13.16 SEP 9 13.52 DEC 9 12.96 MAY 13 12.10

45233909352U02. Local number, 034N28W31BDD02. LOCATION.—Lat 45°23'39", long 93°52'14", in SEJSEJNW4 sec.31, T.34 N., R.28 W., Hydrologic Unit 07010203, 0.4 mi (0.6 km) north of U.S. Highway 10 in Becker. 'Owner: U.S. Geological Survey. AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 1* in (0.03 m), depth 27 ft (8.2 m), screened 25 to 27 ft (7.6 to 8.2 m). DATUM.—Altitude of land-surface datum is 970 ft (296 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—December 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 18.37 ft (5.60 m) below land-surface datum, June 29, 1979; lowest, 22.51 ft (6.86 m) below land-surface datum, Feb. 8, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 20.45 FEB 16 21.35 APR 5 21.03 JUN 2 20.44 AUG 4 20.30 SEP 9 20.41 DEC 9 20.75 MAR 10 21.50 MAY 13 20.69 JUL 9 19.99 j GROUND-WATER LEVELS 41?

SHERBURNE COUNTY—Continued

453121093334401. Local number, 035N26W15DBB01. LOCATION.—Lat 45°31'21", long 93°33'44", in NW4NW4SE4 sec.15, T.35 N., R.26 W., Hydrologic Unit 07010207, on Sanborn farm, 2.5 mi (4.0 km) south of Princeton. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 56 ft (17.1 m), screened 54 to 56 ft 16.5 to 17.1 m). DATUM.—Altitude of land-surface datum is 965 ft (294 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—October 1969 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest rfater level, 3.42 ft (1.04 m) below land-surface datum, Aug. 9, 1972; lowest, 9.19 ft (2.80 m) below land-surface datum, Aug. 17, 1977.

WATER LEVEL, IN FEET BSLOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 7.29 FEB 8 7-03 APR 5 6.06 JUN 2 6.18 AUG 2 7.41 SEP 9 6.98 DEC 9 7.45 MAR 3 8.05 MAY 13 5.93 JUL 7 6.74

10 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

035N26W15DBBOI

452938093432701. Local number, 035N27W29DBB02. LOCATION.—Lat 45°29'38", long 93°43'27", in NW4NW4SE4 sec.29, T.35 N., R.27 W., Hydrologic Unit 07010203, 3.2 rni (5.2 km) north of Orrock in Sherburne National Wildlife Refuge. •Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 m), depth 15 ft (4.6 m), screened 13 to 15 ft (4.0 to 4.6 m). DATUM.—Altitude of land-surface datum is 985 ft (300 m). Measuring point: Top of casing, 4.20 ft (1.28 m) above land-surface datum. PERIOD OF RECORD.—October 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 4.00 ft (1.22 m) below land-surface datum, May 14, 1979; lowest, 8.48 ft (2.58 m) below land-surface datum, Nov. 30, 1976.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 28 5.00 DEC 21 5.70 FEB 16 6.17 APR 21 4.20 MAY 27 4.70 JUN 17 5.69 NOV 18 5.12 JAN 19 6.17 MAR 25 5.13 418 GROUND-WATER LEVELS

SHERBURNE COUNTY—Continued

452952093570801. Local number, 035N29W28ABC01. LOCATION.—Lat 45°29'52", long 93°57'08", in SW4NWJNE4 sec.28, T.35 N., R.29 W., Hydrologic Unit 07010203, on Gilyard farm, north of Clear Lake. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand of Pleistocene Age. rfELL CHARACTERISTICS.—Bored observation water-table well, diameter H in (0.03 m), depth 31 ft (9.4 m), screened 29 to 31 ft (8.8 to 9.4 m). DATUM.—Altitude of land-surface datum is 998 ft (304 m). Measuring point: Top of casing, 2.30 ft (0.70 m) above land-surface datum. PERIOD OP RECORD.—August 1969 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 17.00 ft (5.18 m) below land-surface datum, Aug. 3, 1979; lowest, 22.32 ft (6.80 m) below land-surface datum, Aug. 18, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURPACE DATUM, WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982

rfATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 21.08 PSB 16 21.57 APR 5 20.52 JUN 2 20.25 AUG 4 19-64 SEP 9 19.52 DEC 9 20.16 MAR 10 21.68 MAY 13 20.32 JUL 9 19.61

STEARNS COUNTY

452357094145302. Local number, 122N28W07ABA02. LOCATION.—Lat 45°23'57" in 94 6 l4'53", in NEJNWJNEJ sec.7, T.122 N., R.28 W., Hydrologic Unit 07010203, on Mark John farm. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter U in (0.03 m), depth 22 ft (6.7 m), screened 20 to 22 ft (6.1 to 6.7 m). DATUM.—Land-surface datum is 1,132.3 ft (345-1 m) National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 4.70 ft (1.43 m) above land-surface datum. PERIOD OP RECORD.—October 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 11.75 ft (3-58 m) below land-surface datum, June 30, 1979; lowest, 15.67 ft (4.78 m) below land-surface datum, Mar. 10, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 22 14.29 DEC 23 14.54 FEB 18 14.80 APR 22 13.65 JUN 18 13.88 AUG 19 14.46 NOV 19 14.40 JAN 26 14.70 MAR 17 14.76 MAY 20 13.68 JUL 22 14.00 SEP 23 13.69

9

10

1 1

12

13

14

15

16

17 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

122N28W07ABA02 419

STEARNS COUNTY—Continued

452527094420702. Local number, 123N32W33AAD02. LOCATION.—Lat 45°25'27", long 94°42'07", In SEJNBJNEJ sec.33, T.123 N., R.32 W., Hydrologic Unit 07010202, 2.8 mi (4.5 Km) north of Paynesville. Owner: U.S. Geological Sarvey. AO.UEFER .--Surf icial sand and gravel of Pleistocene Age. WELL CriARACTErtlSTtCS.—Bored observation water-table well, diameter 1J in (0.03 m), depth 14 ft (4.3 m), screened 12 to 14 ft (3-7 to 4.3 m). DATUM.—Altitude of land-surface datum is 1,18? ft (362 m). Measuring point: Top of casing, 2.00 ft (0.61 m) above land-surface datura. PERIOD OP RECORD.—October 1976 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 3.58 ft (1.09 m) below land-surface datum, July 13, 1978; lowest, 12.03 ft (3.67 m) below land-surface datum, May 21, 198l.

WATER LEVEL, IN FEET 3ELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 22 9.09 DEC 23 9.66 MAR 17 9.89 MAY 20 6.96 JUL 22 7.94 SEP 23 8.79 MOV 19 9.42 PEB 18 10.21 APR 22 8.00 JUN 18 7.77 AUG 19 8.60

453158094123701. Local number, 124N28W21CDA01. LOCATION.—Lat 45°31'58", long 94°12'37", in NEJSEJSWi sec.21, T.124 N., R.28 W., Hydrologic Unit 07010203, on Reinert farm, south of St. Cloud. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 m), depth 11 ft (3.4 m), screened 9 to 11 ft (2.7 to 3-4 m). DATUM.—Altitude of land-surface datum is 1,078 ft (329 m). Measuring point: Top of casing, 0.50 ft (0.15 in) above land-surface datum. PERIOD OP RECORD.—October 1969 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 4.82 ft (1.47 m) below land-surface datum, July 13, 1978; lowest, 10.10 ft (3.08 m) below land-surface datum, Apr. 22, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WAFER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL

OCT 22 8.73 DEC 23 3.93 FEB 18 9-93 APR 22 8.59 JUN 18 7.99 AUG 19 8.96 NOV 19 8.80 JAN 26 9.54 MAR 17 9.81 MAY 20 8.13 JUL 22 8.11 SEP 23 9-05

453937094491102. Local number, 125N33W03CDA02. LOCATION.--Lat 45°39'37", long 94°49'H", in NEjSEiSWJ sec.3, T.125 N., R.33 W., Hydrologic Unit 07010202, on Me1rose Golf Course. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 13 ft (4.0 m), screened 11 to 13 ft (3.4 to 4.0 m). DATUM.—Altitude of land-surface datum is 1,209 ft (368 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—December 1976 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 3.63 ft (1.11 m) below land-surface datum, Apr. 30, 1979; lowest, 7.88 ft (2.40 m) below land-surface datum, Feb. 9, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 22 4.96 DEC 23 5.29 FEB 18 5.71 APR 22 4.33 JUN 18 4.93 AUG 19 6.05 NOV 19 5.16 JAN 20 5.63 MAR 17 5.49 MAY 20 3.84 JUL 22 5.21 SEP 23 5.33 M T) O E: > Ir1 -t x pa ?» P] «G i-3 33 1-3 r1 G O ^i M p3 M P C. J> *-0 O P3 C CC SS 0 -T| O i-3 -& s s a o . 00 CJ Kl "O M ro 0> P3 < 1 S » O 0) O o 0> M O 0) 1 i~t) ?» • ^ • Ct 'x] ^Cs ct » 1 3 « UJ - ^ MM > 1 0) 1 i-1 O 33 P ct UJ S3 PJ P H- UJ h9 fB •• r1 .t UJ O ft ct fO PJ M P O • "0 0 1 C • PC 0) ct O ro PJ S3 a> ft VO M P 33 I-" O S3 O C fl> CO P O -& • M • rj 3 i-3 'O UJ *~^ O 1 *~^ O ^-'l-H >Tl 0) O Ct O 1 SO r*> • 0 O ui r1 Ca T W -J O -^ O O 0) M • 3 M - o t— ' *r] <^ p 1 P (D 4^P O 0) ft 3 1 CT < ro t— • S3 3 P ft a H- p »" P M PJ CT Ct 1 T 0 ct ro o a> C ra H- 3 0 C 0 T 3 C M T M 3 3 Si • T M 0 • O CT —- O M '1 n> "j 3 0) • Vj3 p ft _, CR T DEPTH TO WATER. IN FEET BELOW LAND SURFACE

M Q CO P CO (D H- O O T P ft M O

T O Ct M- 0) P a (D ro P M •

ir s, pd > <; 1-3 p] pa r1 S3

< ^ 421 GROUND-WATER LEVELS

STEELE COUNTY—Continued

440442093135801. Lo?.al number, 107N20W16ABD01. LOCATION.—Lat 44°04'42", long 93°13'58", In SE4NW4NEJ sec.l6, T.107 N., R.20 W., Hydrologic Unit 0/040002, at Owatonna. Owner: City of Owatonna, well 4. AQUIFER.—Prairie du Chien Group of Early Ordovlclan Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled public supply artesian well, diameter 16 in (0.41 m), depth 710 ft (216 m), cased to 376 ft (115 m). DATUM.—Altitude of land-surface datum is 1,130 ft (344 m). Measuring point: Vent pipe, 1.00 ft (0.30 m) above land-surface datum. RS'IARKS.—Water level affected by pumping. PERIOD OP RECORD.—January 1982 to September 1982. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 144.4 ft (44.01 m) below land-surface datum, Jan. 14, 1982; lowest, 146.6 ft (44.68 m) below land-surface datum, Mar. 10, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL JAN 14 144.4 MAR 10 146.6 MAY 7 145.1

SWIFT COUNTY

451329096000101. Local number, 120N43W02DDD01. LOCATION.—Lat 45°13'29", long 96°00'01", in SEJSEJSE4 sec.2, T.120 N., R.43 W., Hydrologic Unit 07020002, at Appleton Airport. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand and gravel of Pleistocene Age. WELL CHArtACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 34 ft (10.4 m), screened 32 to 34 ft (9.8 to 10.4 m). DATUM.—Altitude of land-surface datum is 1,020 ft (311 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—September 1972 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 18.44 ft (5-62 m) below land-surface datum, Sept. 14, 1972; lowest, 25.02 ft (7.63 m) below land-surface datum, Feb. 16, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 24.65 DEC 15 24.91 FEB 16 25.02 APR 13 24.19 JUN 8 23.84 AUG 11 23.99 26 24.68 31 24.95 MAR 15 24.80 15 24.16 15 23.90 16 24.03 NOV 19 24.54 JAN 8 25.00 25 24.72 MAY 13 23.99 JUL 20 23.90 SEP 15 24.23

451913095370201. Local number, 121N39W06BDB01. LOCATION.—Lat 45°19'13", long 95°37'02", in NWJSEJNWt sec.6, T.121 N., R.39 W., Hydrologic Unit 07020005, in Ambush Park. Owner: City of Benson. AQUIFER.--Buried sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 3 in (0.08 m), depth 143 ft (43-6 m), screened 123 to 143 ft (37.5 to 43.6 m). DATUM.—Altitude of land-surface datum is 1,030 ft (314 m). Measuring point: Top of shelter floor, 3.10 ft (0.94 m) above land-surface datum. REMARKS.—Water level affected by pumping. PERIOD OF RECORD.—May 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 6.48 ft (1.98-m) below land-surface datum, June 29, 1979; lowest, 19.90 ft (6.07 m) below land-surface datum, July 24, 1980.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 18 8.85 MAR 30 9.72 JUN 2 8.70 JUN 30 9.80 JUL 19 11.20 SEP 7 10.19 FEB 9 10.05 APR 14 8.75 422 GROUND-WATER LEVELS

SWIFT COUNTY--Continued

452211095570701. Local number, 122N42W21BBB01. LOCATION.—Lat 45°22'11", long 95°57'07", in NW4NWJNW4 sec.21, T.122 N., R.42 W., Hydrologic Unit 07020002, north of Holloway. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS'.—Bored observation water-table well, diameter 14 in (0.03 m), depth 27 ft (8.2 m), screened 25 to 27 ft (7.6 to 8.2 m). DATUM.—Altitude of land-surface datum 1,048 ft (319 m). Measuring point: Top of casing, 2.80 ft (0.85 m) above land-surface datum. PERIOD OF RECORD.—September 1972 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 14.81 ft (4.51 m) below land-surface datum, July 9, 1979; lowest, 22.01 ft (6.71 m) below land-surface datum, Dec. 11, 1980.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 17.54 DEC 15 17.61 MAR 15 17.46 MAY 13 16.10 JUN 15 15.89 AUG 16 16.35 26 17.55 JAN 18 17.71 25 17.42 JUN 8 15.83 AUG 11 16.25 SEP 15 16.90 NOV 19 17.63 FEB 16 17.20 APR 15 16.82

13

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16

17

18

19

20

21

22

I I I 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

122N42W21BBB01

i

TODD COUNTY

455337094521001. Local number, 128N33W17CCB01. LOCATION.—Lat 15°53'37", long 94°52'10", in NWJSWJSWi sec.17, T.128 N., R.33 W., Hydrologic Unit 07010202, 4.9 mi (7-9 km) south of Long Prairie. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 62 ft (18.9 m), screened 60 to 62 ft (18.3 to 18.9 m). DATUM.—Altitude of land-surface datum is 1,332 ft (406 m). Measuring point: Top of casing, 3.00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—May 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 22.77 ft (6.9,4 m) below land-surface datum, Nov. 27, 1979; lowest, 27-22 ft (8.30 m) below land-surface datum, Aug. 8, 1978.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 14 25.04 DEC 16 25.64 MAR 17 25.60 MAY 13 24.10 JUNi 16 23.84 SEP 16 23.55 NOV 12 25.06 JAN 18 25.38 APR 15 24.30 423 GROUND-WATER LEVELS

TODD COUNTY—Continued

460440094505901. Local number, 130N33W16BBA01. LOCATION.—Lat 46°04'40", long 94°50'59", in NE4NW4NW4 sec.16, T.130 N., R.33 W., Hydrologic Unit 07010108, 0.5 mi (0.8 km) east of Browerville. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand and gravel of Pleistocene Age. •JELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 34 ft (10.4 m), screened 32 to 34 ft (9.8 to 10.4 m). DATUM.—Altitude of land-surface datum is 1,270 ft (387 m). Measuring point: Top of casing, 2.70 ft (0.82 m) above land-surface datum. PERIOD OP RECORD.—June 1979 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 12.14 ft (3.70 m) below land-surface datum, Apr. 19, 1982; lowest, 14.18 ft (4.32 m) below land-surface datum, Mar. 16, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 14 13.64 DEC 16 13.53 FEB 16 13.92 APR 19 12.14 JUN 15 12.90 AUG 16 13.27 NOV 12 13-79 JAN 18 14.01 MAR 16 14.18 MAY 13 12.52 JUL 14 13.44 SEP 15 13.48

461234094480201. Local number, 132N33W26DCC01. LOCATION.—Lat 46°12'34", long 94°48'02", in SW4SW4SE4 sec.26, T.132 N., R.33 W., Hydrologic Unit 07010108, 11 mi (17.7 km) south of Staples. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 31 ft (9.4 m), screened 29 to 31 ft (8.8 to 9.4 m). DATUM.—Altitude of land-surface datum is 1,260 ft (384 m). Measuring point: Top of casing, 2.60 ft (0.79 m) above land-surface datum. PERIOD OF RECORD.—May 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 8.08 ft (2.46 m) below land-surface datum, July 14, 1982; lowest, 11.31 ft (3.45 m) below land-surface datum, Feb. 28, 1980.

WATER LEVEL, IM FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 9.89 DEC 15 10.31 FEB 22 10.99 APR 19 9.57 JUN 15 8.22 AUG 16 8.25 NOV 13 9-97 JAN 18 • 10.78 MAR 16 11.09 MAY 13 8.99 JUL 14 8.08 SEP 15 8.66

461935094413101. Local number, 133N32W14CCC01. LOCATION.—Lat 46°19'35", long 94°41'31", in SW4SW4SW4 sec.14, T.133 N., R.32 W., Hydrologic Unit 07010106, 2 mi (3.2 km) southwest of Motley. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 24- ft (7.3 m), screened 22 to 24 ft (6.7 to 7.3 m). DATUM.—Altitude of land-surface datum is 1,238 ft (377 m). Measuring point: Top of casing, 2.50 ft (0.76 m) above land-surface datum. PERIOD OF RECORD.—May 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 2.14 ft (0.65 m) below land-surface datum, Apr. 19, 1982; lowest, 4.76 ft (1.45 m) below land-surface datum, Nov. 16, 1978.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 2.33 DEC 15 3.67 FEB 22 3.07 APR 19 2.14 JUN 15 3.52 AUG 16 4.38 NOV 13 3.32 JAN 18 3.99 MAR 16 3.50 MAY 13 2.42 JUL 14 3.57 SEP 15 3.52 424 GROUND-WATER LEVELS

TODD COUNTY--Continued

462024095091401. Local number, 133N35W07CCC01. LOCATION.—Lat 46°20'24", long 95°09'14", In SW4SWJSWJ sec.7, T.133 N., R.35 W., Hydrologlc Unit 07010107, east of Kramer farm. Owner: U.S. Geological Survey. AQUIFER.—Surflcial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 15 ft (4.6 m), screened 13 to 15 ft (4.0 to 4.6 m). DATUM.—Altitude of land-surface datum is 1,384 ft (422 m). Measuring point: Top of casing, 5.20 ft (1.58 m) above land-surface datum. REMARKS.—Water level subject to freezing during winter. PERIOD OP RECORD.—November 1966 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 0.10 ft (0.03 m) above land-surface datum, Aug. 8, 1972; lowest, 6.13 ft (1.87 m) below land-surface datum, Aug. 10, 1977. WATER LEVEL, IN FEET BELOW LAND-SURPACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 1.86 DEC 15 2.36 FEB 16 3.04 MAY 14 0.37 JUL 14 3.54 SEP 16 1.96 NOV 16 1.96 JAN 20 2.96 MAR 15 2.94 JUN 14 1.19 AUG i'. 3.60

•H I——T

0

1

2

3

EH fe 4 W K H t= 5

6

7

I I I I 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

133N35W07CCC01

WABASHA COUNTY

442708092155401. Local number, 111N12W04BBD01. LOCATION.—Lat 44°27'08", long 920 15'54", in SE4NW4NWJ sec.14, T.lll N., R.12 W., Hydrologic Unit 07040001, at Lake City. Owner: City of Lake City, well 3. AQUIFER.—Mount Simon Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 16 in (0.41 m), depth 430 ft (131 m), cased to 258 ft (78.6 m). DATUM.—Altitude of land-surface datum is 685 ft (209 m). Measuring point: Top of casing, 1.00 ft (0.30 m) above land-surface datum. REMARKS.—Measured weekly by David Finley. PERIOD OF RECORD.—August 1974 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 3.63 ft (1.11 m) below land-surface datum, May 5, 1975; lowest, 11.50 ft (3-51 m) below land-surface datum, Jan. 31, 1977. WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 5 10.49 DEC 7 10.30 JAN 25 10.57 MAR 23 9.89 JUN 7 7.80 AUG 16 10.91 13 10.57 14 9.50 FEB 8 10.66 APR 6 6.30 21 9.11 23 10.92 18 10.04 21 10.49 17 10.58 19 5.10 JUL 6 9.92 30 9.75 26 9.24 28 10.63 22 10.61 MAY 9 6.20 12 9-92 SEP 6 9-98 NOV 9 10.19 JAN 4 10.58 MAR 1 10.60 17 6.10 26 10.09 13 10.46 16 10.09 11 10.72 8 10.61 24 6.10 AUG 2 10.27 20 9.89 23 10.18 18 10.57 15 10.52 JUN 1 6.50 9 10.62 27 10.30 30 10.29 425 GROUND-WATER LEVELS

WADENA COUNTY

462421095003601. Local number, 134N34W19ADD01. LOCATION.—Lat 46°24'21", long 95°00'36", in SEftSEJNEJ sec.19, T.134 N., R.34 W., Hydrologic Unit 07010107, 0.05 mi (0.08 km) north of Verndale. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 m), depth 37 ft (11.3 m), screened 34 to 37 ft (10.4 to 11.3 m). DATUM.—Altitude of land-surface datum is 1,342 ft (409 m). Measuring point: Top of casing, 1.00 ft (0.30 m) above land-surface datum. PERIOD OP RECORD.—September 1966 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest *ater level, 9-48 ft (2.89 m) below land-surface datum, June 2, 1972; lowest, 15.33 ft (4.41 m) below land-surface datum, Mar. 10-11, 1977-

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 LOWEST VALUES

DAY OCT DEC JAN FEB MAR APR MAY .TUN JUL AUG SEP

5 12.98 12.69 12.77 13.01 .18 13.29 13.10 .36 11. 11.07 11.26 11.27 10 12.96 12.69 12.82 13.06 ,20 13.31 13.00 .38 11, 10 11.06 11.19 11.30 15 12.92 12.68 12.87 13,.10 .22 13.35 12.90 .35 11 14 11.09 11.18 11.31 20 12.82 12.70 12.90 13. 14 ,24 ,54 .22 11, 17 11.14 11.27 25 12.72 12.70 12.93 13, 15 .25 .56 .10 11 07 11.18 11.31 EOM 12.71 12.71 12.97 13, 17 ,27 .45 .07 11.24 11.24 11.34 itfTR YEAR 1982 HIGHEST 11.06 JULY 10, 1982 LOWEST 13-56 MAR 25, 1982

463027094480201. Local number, 135N33W14ADD01. LOCATION.—Lat 46°30'27", long 94°48'02", in SEJSEJNEJ sec.14, T.135 N., R.33 W., Hydrologic Unit 07010106, 4.6 mi (7.4 km) south of Oylen. Owner: U.S. Geological Survey. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 20 ft (6.1 m), screened 18 to 20 ft (5-5 to 6.1 m). DATUM.—Altitude of land-surface datum is 1,265 ft (386 m). Measuring point: Top of casing, 3-00 ft (0.91 m) above land-surface datum. PERIOD OF RECORD.—October 1974 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 10.58 ft (3.22 m) below land-surface datum, May 16, 1979; lowest, 15.15 ft (4.62 m) below land-surface datum, Nov. 14, 1976.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER •WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 13.77 DEC 15 13.40 FEB 16 13.49 MAR 29 12.60 JUN 14 10.90 AUG 16 12.54 NOV 16 13.34 JAN 20 13.58 MAR 16 13.33 MAY 14 11.23 JUL 14 11.71 SEP 14 13.21

4639.06094521201. Local number, 137N33W29DAA01. LOCATION.—Lat 46°39'06", long 94°52'12", in NEJNSJSEJ sec.29, T.137 N., R.33 W., Hydrologic Unit 07010106, at Nimrod Ranger Station. Owner: State of Minnesota. AQUIFER.—Buried sand of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 2 in (0.05 m), depth 70 ft (21.3 m). DATUM.—Altitude of land-surface datum is 1,372 ft (418 m). Measuring point: Top of casing, 1.50 ft (0.46 m) above land-surface datum. PERIOD OF RECORD.—October 1974 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 38.69 ft (11.-79 m) below land-surface datum, July 16, 1979; lowest, 42.17 ft (12.85 m) below land-surface datum, Oct. 16, 1976.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

tfATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 15 39.28 DEC 16 39.32 FEB 16 39.80 APR 13 39.10 JUN 14 38.71 AUG 16 39.46 NOV 15 39.17 JAN 20 39.72 MAR 15 39.83 MAY 14 38.99 JUL 14 38.85 SEP 14 40.01 426 GROUND-WATER LEVELS

WADENA COUNTY—Continued 34 i—i—r

35

36

37

38

39

40

41

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43

44 973 1974 1975 1976 1977 1978 1979 1980 1981 1982

137N33W29DAA01 464116095010101. Local number, 137N34WOfDDDOl. LOCATION.—Lat 46°4l'l6", long 95°01'01", in SE4SE4SE4 sec. 1, T.137 N., R.34 W., Hydrologic Unit 07010106, northeast of Sebeka. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 10 ft (3.1 m), screened 8 to 10 ft (2.4 to 3.1 m). DATUM.—Altitude of land-surface datum is 1,368 ft (417 m). Measuring point: Top of casing, 2.80 ft (0.85 m) above land-surface datum. PERIOD OP RECORD.—October 1974 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 0.17 ft (0.05 m) below land-surface datum, Apr. 18, 1979; lowest, 5-59 ft (1.70 m) below land-surface datum, Jan. 15, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEV^L DATE LEVEL DATE LEVEL OCT 15 1.90 DEC 15 2.44 FEB 16 3.38 MAR 15 3.33 APR 13 0.37 SSP 14 1.56 NOV 16 2.11 JAN 20 3.23

1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 137N34W07DDD01 427 GROUND-WATER LEVELS

WASHINGTON COUNTY

445125092464001. Local number, 027N20W02BCC01. LOCATION.—Lat 44°51'25", long 92°46'40", in SW4SWJNWJ sec.2, T.27 N., R.20 W., Hydrologic Unit 07030005, in Afton State Park by Afton Alps. Owner: U.S. Geological Survey. AQUIFER.—St. Lawrence Formation and Franconian Sandstone of Late Cambrian Age. tfELL CHARACTERISTICS.—Drilled observation artesian well, diameter 6 in (0.15 m), depth 285 ft (86.9 m), cased to 105 ft (32.0 m). DATUM.—Altitude of land-surface datum is 695 ft (212 m). Measuring point: Center of pressure guage, 4.50 ft (1.37 m) above land-surface datum. PERIOD OF RECORD.—March 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 33.94 ft (10.38 m) above land-surface datum, May 2, 1980; lowest, 27.50 ft (8.38 m) above land-surface datum, Oct. 15, Nov. 4, 1981. WATER LEVEL, IN FEET ABOVE LAND-SURFACE DATUM, WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982 WATER WATER DATE LEVEL DATE LEVEL OCT 15 27.50 NOV 4 27.50

445125092464002. Local number, 027N20W023CC02. LOCATION.—Lat 44°51'25", long 92O 46'40", in SW4SWJNW4 sec.2, T.27 N., R.20 W., Hydrologic Unit 07030005, in Afton State Park by Afton Alps. Owner: U.S. Geological Survey. AQUIFER.—Ironton-Galesville Sandstones of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 4 in (0.10 m), depth 385 ft (117 m), cased to 365 ft (111 m). DATUM.—Altitude of land-surface datum is 695 ft (212 m). Measuring point: Center of pressure guage, 4.50 ft (1.37 m) above land-surface datum. PERIOD OF RECORD.—March 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 42.35 ft (12.91 m) above land-surface datum, May 2, 1980; lowest, 32.68 ft (9.96 m) above land-surface datum, Oct. 15, Nov. 4,1981.

WATER LEVEL, IN FEET ABOVE LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER DATE LEVEL DATE LEVEL OCT 15 32.68 NOV 4 32.68

445125092464003. Local number, 027N20W02BCC03. LOCATION.—Lat 44°51'25" J long 92°46'40", in SW4SWJNWJ sec.2, T.27 N., R.20 W., Hydrologic Unit 07030005, in Afton State Park by Afton Alps. Owner: U.S. Geological Survey. AQUIFER.—Mount Simon Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 1| in (0.04 m), depth 535 ft (163 m), screened 530 to 535 ft (162 to 163 m). DATUM.—Altitude of land-surface datum is 695 ft (212 m). Measuring point: Center of pressure guage, 4.70 ft (1.43 m) above land-surface datum. PERIOD OF RECORD.—March 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 22.05 ft (6.72 m) above land-surface datum, May 2, 1980; lowest, 14.48 ft (4.41 m) above land-surface datum, Sept. 22, Oct. 15, 1981.

WATER LEVEL, IN FEET ABOVE LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER DATE LEVEL DATE LEVEL OCT 15 14.48 NOV 4 14.82 428 GROUND-WATER LEVELS

WASHINGTON COUNTY—Continued

444751092563101. Local number, 027N21W28BCC01. LOCATION.—Lat 44°47'51", 92°56'31", in SWJSW4NW4 sec.28, T.27 N., R.21 W., Hydrologic Unit 07010206, 0.1 mi (0.2 km) east of Ideal Avenue South. Owner: Eugene Sraallidge. AQUIFER.—Prairie du Chien Group of Early Ordovician Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled irrigation water-table well, diameter 16 in (0.41 m), depth 345 ft (105 m), cased to 60 ft (18.3 m). DAT'M.—Altitude of land-surface datum is 807 ft (246 m). Measuring point: Hole in pump base, 2.10 ft (0.64 m) above land-surface datum. PERIOD OP RECORD.—August 1977, January 1978, December 1979 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest *ater level, 62.34 ft (19-00 m) below land-surface datum, Dec. 10, 1979; lowest, 81.87 ft (24.95 m) below land-surface datum, Aug. 3, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 19&1 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 72.18 JAN 5 72.75 MAR 2 73.72 MAY 4 71.77 SEP 14 73.95

62

64

66

68

70

72

74

76

78

80

82 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

027N21W28BCC01

445536092462401. Local number, 028N20W11CAA01. LOCATION.—Lat 44°55'36", long 92°46'24", in NEJNEJSWJ sec.11, T.28 N., R.20 W., Hydrologic Unit 07030005, at Lake St. Croix Beach. Owner: Lower St. Croix Valley Fire Department. AQUIFER.--Franconian Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled domestic water-table well, diameter 4 in (0.10 m), depth 94 ft (28.6 m), cased to 78 ft (23.8 m). DATUM.—Altitude of land-surface datum is 720 ft (220 m). Measuring point: Top of electrical housing, 1.70 ft (0.52 m) above land-surface datum. PERIOD OF RECORD.—June 1978 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 31.78 ft (9.69 m) below land-surface datum, May 14, 1979; lowest, 38.65 ft (11.78 m) below land-surface datum, Mar. 3, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 4 37.22 JAN 6 38.32 MAR 3 38.65 MAY 19 33.40 SEP 8 38.10 429 GROOND-WATEH LEVELS

WASHINGTON COONTY--Contlnued

450134092583101. Local number, 029N21W06CAD01. LOCATION.—Lat 45°01'34", long 920 58'31", in SE4NB4SWJ sec.6, T.29 N., R.21 W., Hydrologic Unit 07010206, at 6488 North Highway 36 Boulevard. Owner: Twenty Nine Pines Trailer Park. AQUIFER.—St. Peter Sandstone of Middle Ordovician Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 6 in (0.15 m), depth 210 ft (64.0 m), cased to 141 ft (43.0 m). DATUM.—Altitude of land-surface datum is 980 ft (299 m). Measuring point: Hole in pump base, 2.20 ft (0.6? m) above land-surface datum. PERIOD OP RECORD.—April 1974 to current year. EXTREMES TOR PERIOD OP RECORD.—Highest water level, 73-90 ft (22.52 m) below land-surface datum, May 10, 1982- lowest, 77.47 ft (23.61 m) below land-surface datum, Sept. 13, 1977.

WATER LEVEL, IN PEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 74.97 JAN 6 74.58 MAR 3 74.53 MAY 10 73.90 SEP 8 76.07

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79 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

029N21W06CAD01

450027092552101. Local number, 029N21W10CCC01. LOCATION.—Lat 45°00'27", long 95°55'21", in SW4SW4SW4 sec.10, T.29 N., R.21 W., Hydrologic Unit 07010206, Lake Jane Road, 0.7 mi (1.1 km) north of Highway 212. Owner: City of Lake Elmo. AQUIFER.—Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 6 in (0.15 m), depth 348 ft (106 m), cased to 280 ft (85.3 m). DATUM.—Altitude of land-surface datum is 935 ft (285 m). Measuring point: Top of well cap, 1.20 ft (0.37 m) above land-surface datum. PERIOD OF RECORD.—September 1977, February 1978, February 1980 to current year. EXTREMES FOR PERIOD OF RECORD.--Highest water level, 39-58 ft (12.06 m) below land-surface datum, Nov. 18, 1980; lowest, 45.65 ft (13.91 m) below land-surface datum, Sept. 28, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 4 40.78 JAN 6 41.50 MAR 3 41.67 MAY 10 40.78 SEP 8 40.60 GROUND-WATER LEVELS

WASHINGTON COUNTY--Continued

445958092523901. Local number, 029N21W13CAB01. LOCATION.—Lat 44°59'58 M , long 92°52'39", in NW4NE4SW4 sec.13, T.29 N., R.21 W., Hydrologic Unit 07010206, in City of Lake Elmo. Owner: Elmo Lumber and Plywood. Formerly Lake Elmo Creamery. AQUIFER.—Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 12 in (0.30 m), depth 122 ft (37.2 m), screened 106 to 122 ft (32.3 to 37-2 m). DATUM.—Altitude of land-surface datum is 938 ft (286 m). Measuring point: Hole in pump base, 1.30 ft (0.40 m) above land-surface datum. PERIOD OP RECORD.—August 1977 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 46.85 ft (14.28 n) below land-surface datum, Nov. 18, 1980; lowest, 51.37 ft (15.66 m) below land-surface datum, June 12, 1978.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 4 47.35 JAN 6 46.90 MAR 3 47.82 MAY 10 47.30 SEP 8 47.45

450646092473501. Local number, 030N20W03CAD01. LOCATION.—Lat 45°06'46", long 92°47'35", in SEJNEiSWJ sec.3, T.30 M., R.20 W., Hydrologic Unit 07030005, at Little Carnelian Lake. Owner: Stillwater Township. AQUIFER.--Ironton-Galesville Sandstones of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled observation artesian well, diameter 4 in (0.10 m), depth 360 ft (110 m), cased to 303 ft (92.4 m). DATUM.—Land-surface datum is 915.6 ft (279.1 m) National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 2.30 ft (0.70 m) above land-surface datum. PERIOD OF RECORD.—September 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 132.5 ft (40.39 m) below land-surface datura, Sept. 16, 30, 1982; lowest, 139-2 ft (42.43 m) below land-surface datum, Sept. 25, 1980.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 28 136.5 FEB 14 136.0 APR 1 136.1 MAY 30 134.4 JUL 1 133.5 SEP 16 132.5 DEC 9 136.7 MAR 24 136.2 25 135-1 JUN 28 133.4 30 132.7 30 132.5

450647092473503. Local number, 030N20W03CAD03. LOCATION.—Lat 45°06'47", long 92°47'35", in SE4NEJSW4 sec.3, T.30 N., R.20 W., Hydrologic Unit 07030005, at Little Carnelian Lake. Owner: Stillwater Township. AQUIFER.--Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled observation water-table well, diameter 4 in (0.10 m), depth 130 ft (39-6 m), screened 126 to 130 ft (38.4 to 39.6 m). DATUM.—Land-surface datum is 915.6 ft (279.1 m) National Geodetic Vertical Datum df 1929. Measuring point: Top of casing, 2.30 ft (0.70 m) above land-surface datum. PERIOD OF RECORD.—October 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 103.0 ft (31.39 m) below land-Uurface datum, Sept. 16, 1982; lowest, 106.4 ft (32.43 m) below land-surface datum, Oct. 21, 1980.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198'l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 28 104.6 FEB 14 104.3 APR 1 104.4 MAY 30 103.8 JUL 1 103.5 SEP 16 103.0 DEC 9 104.8 MAR 24 104.4 25 103.9 JUN 28 103.3 30 103.2 30 103.1 431

WASHINGTON COUNTY—Continued

450858092575001. Local number, 031N21W28ABD01. LOCATION.—Lat 45°08'58", long 92°57'50" ) in 3EJNW4NEJ sec.28, T.31 N., R.21 W., Hydrologic Unit 07010206, County Road 8H, 1.65 mi (2.6 km) east of Highway 6l. Owner: ,Vhite Bear Gun Club. AQUIFER. — Prairie du Chlen Group of Early Ordovician Age. WELL CHARACTERISTICS.—Drilled domestic artesian well, diameter 4 in (0.10 m), depth 142 ft (43-3 m), cased to 94 ft (28.6 m). DATUM.—Altitude of land-surface datum is 939 ft (28.6 m). Measuring point: Top of well cap, 1.30 ft (0.40 m) above land-surface datum. PERIOD OP R2CORD.—September 1977, February 1978, February 1980 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 10.12 ft (3.08 m) below land-surface datum, May 10, 1982; lowest, 13.17 ft (4.01 m) below land-surface datum, Sept. 30, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 10.63 JAN 13 10.89 MAR 3 11.10 MAY 10 10.12 SEP 8 11.50

451355092532601. Local number, 032N20W30BCDO1. LOCATION.—Lat 45°13'55" J long 92°53'26", in SEfcSrfJMJ sec.30, T.32 N., R.20 W., Hydrologic Unit 07030005, 0.25 mi (0.4 km) north of 192nd Street. Owner: Ar.no Birr. AQUIFER.—Prairie du Chien Group of Early Ordovician Age and Jordan Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 In (0.30 m), depth 260 ft (79-2 m), cased to 141 ft (43.0 m). DATUM.—Altitude of land-surface datum is 990 ft (302m). Measuring point: Vent pipe, 1.00 ft (0.30 m) above land-surface datum. PERIOD OF RECORD.—March 1981 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 53.18 ft (16.21 m) below land-surface datum, Sept. 1, 1981; lowest, 53.89 ft (16.43 m) below land-surface datum, May 6, 1981.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 3 53.32 MAR 3 53-88 MAY 10 53-30 SEP 8 53-83

WATONWAN COUNTY

440037094372601. Local number, 106N32W01DDB01. LOCATION.—Lat 44°00'37", long 94°37'26", in MW4S3JSE4 sec.l, T.106 N., R.32 W., Hydrologic Unit 07020010, north of St. James. Owner: U.S. Geological Survey. AQUIFER.--Surficial outwash sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 2 in (0.05 m), depth 22 ft (6.7 m), screened 19 to 22 ft (5.8 to 6.7 m). DATUM.—Altitude of land-surface datum is 1,056.2 ft (321.9 m) National Geodetic Vertical Datum of 1929. Measuring point: Top of wood platform, 0.80 ft (0.24 m) above land-surface datum. PERIOD OF RECORD.—November 1965 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 4.11 ft (1.25 m) below land-surface datum, Apr. 27, 1969; lowest, 14.34 ft (4.37 m) below land-surface datum, Mar. 1, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATS LEVEL DATE LEVEL DATE LEVEL NOV 17 11.30 JAN 27 11.47 APR 7 10.6? JUNE 3 10.48 AUG 10 10.56 432 GROUND-WATER LEVELS

WATOMWAN COUNTY—Continued

440409094304901. Local number, 107N31W14DAC01. LOCATION.—Lat 44°04'09", long 94°30'49", In SW4NE4SE4 sec.14, T.107 N., R.31 W., Hydrologlc Unit 07020010, 2.75 ml (4.4 km) east of LaSalle. Owner: William Lassas. AQUIFER.--Sandstone of Cretaceous Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 12 in (0.30 ra), depth 150 ft (45-7 m), screened 100 to 135 ft (30.5 to 41.2 m). DATUM.—Altitude of land-surface datum is 1,008 ft (307 m). Measuring point: Vent pipe, 1.80 ft (0.55 ra) above land-surface datum. PERIOD OP RECORD.—September 1981 to current year. EXTREMES POR PERIOD OP RECORD.—Highest water level, 12.85 ft (3.92 m) below land-surface datum, Apr. 17, 1980; lowest, 14.32 ft (4.36 m) below land-surface datum, Sept. 15, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1931 TO SEPTEMBER 1982 WATER WATER WATER WATER LEVEL DATE LEVEL DATE LEVEL DATE LEVEL 13.50 MAR 9 13.03 MAY 17 12.98 SEP 15 14.32

440133094312501. Local number, 107H31W35CAC01. LOCATION.--Lat 44°01'33", long 94°31'25", in SW4NE4SW4 sec.35, T.107 N., R.31 W., Hydrologic Unit 07020010, northeast of St. James. Owner: Al Guyer. AQUIFER.—Mount Simon Sandstone of Late Cambrian Age. WELL CHARACTERISTICS.—Drilled irrigation artesian well, diameter 10 in (0.25 m), depth 350 ft (107 m), screened 310 to 350 ft (94.5 to 107 m). DATUM.—Altitude of land-surface datum is 1,055 ft (322 m). Measuring point: Vent pipe, 1.00 ft (0.30 ra) above land-surface datum. PERIOD OF RECORD.—September 1981 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 31.47 ft (9-59 ra) below land-surface datum, Apr. 17, 1980; lowest, 33.70 ft (10.27 m) below land-surface datum, Sept. 15, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1932

WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 9 32.74 MAR 9 32.40 MAY 17 31.95 SEP 15 33.70

WINONA COUNTY

435756092034201. Local number, 106N10W19DDAO1. LOCATION.—Lat 43°57'56", long 92°03'42", in NE4SEJSE4 sec.19, T.106 N., R.10 "W., Hydrologic Unit 07040003, at St. Charles. Owner: City of St. Charles, well 1. AQUIFER.—Prairie du Chien Group of Early Ordovician Age. WELL CHARACTERISTICS.—Drilled unused water-table well, diameter 10 in (0.25 ra), depth 175 ft (53-3 ra), cased to 30 ft (9-1 ra). DATUM.—Altitude of land-surface datum is 1,160 ft (354 m). Measuring point: Hole in pump base, 2.25 ft (0.69 m) above land-surface datum. REMARKS.—Measured weekly by Jim Braun. Water level affected by pumping. PERIOD OF RECORD.—October 1973 to current year. EXTREMES POR PERIOD OF RECORD.—Highest water level, 32.72 ft (9-97 m) below land-surface datum, July 19, 1974; lowest, 55.04 ft (16.78 m) below land-surface datum, Mar. 23, 1978.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 30 48.25 DEC 4 46.31 JAN 13 47.25 FEB 22 48.29 MAR 29 46.05 MAY 12 43.55 NOV 6 45-45 11 46.35 22 47.57 25 50.45 APR 5 44.75 25 39.27 16 43.85 17 46.65 FEB 1 47.95 MAR 4 48.45 12 44.25 JUN 2 37.87 20 45.67 28 46.65 5 48.15 12 48.55 21 44.37 29 37.35 27 45.90 JAN 5 46.62 12 48.35 19 47.55 MAY 2 43.35 SEP 24 42.49 GROUND-WATER LEVELS

WRIGHT COUNTY 150318091010602. Local number, 118N27W03CAC01. LOCATION.—Lat 15°03'18", long 91°01'06", in SWiNEjSWJ sec.3, T.118 N., R.27 W., Hydrologic Unit 07010201, at Howard Lake, well 1 Owner: City of Howard Lake. AQUIFER.—Mount Simon Sandstone of Late Cambrian Age and Hinckley Sandstone of Late Precambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 8 in (0.20 m), depth 510 ft (155 m), originally drilled to 900 ft (271 m), cased to 183 ft (117 m). DATUM.—Altitude of land-surface datum is 1,015 ft (318 m). Measuring point: Top of casing, 2.00 ft (0.61 m) above land-surface datum. REMARKS.—Water level affected by pumping from well 115 ft (35-05 m) away. PERIOD OP RECORD.—September 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 111.7 ft (11.10 m) below land-surface datum, Oct. 15, 1979; lowest, 151.7 ft (17.15 m) below land-surface datum, Apr. 6, 1979.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 9 116.2 MAR 15 116.8 MAY 11 153.6 JUL 12 151.1 SEP 22 151-3

150318091010603. Local number, 118N27W03CAC03- LOCATION.—Lat I5°03'l8", long 9l°0l'06", in SWJNEJSW4 sec.3, T-118 N., R.27 W., Hydrologic Unit 07010201, at Howard Lake water tower. Owner: City of Howard Lake, well 3. AQUIFER.—Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled public-supply artesian well, diameter 12 in (0.30 m), depth 118 ft (15.1 m), screened 138 to 118 ft (12.1 to 15.1 m). DATUM.—Altitude of land-surface datum is 1,015 ft (319 m). Measuring point: Top of breather pipe, 1.80 ft (0.55 m) above land-surface datum. PERIOD OF RECORD.—September 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 62.78 ft (19.11 m) below land-surface datum, May 29, 1979; lowest, 72.19 ft (22.00 m) below land-surface datum, June 21, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL NOV 9 68.10 MAR 15 68.50 MAY 11 68.02 JUL 12 68.27 SEP 22 68.85

150628093512102. Local number, 119N26W21BAB02. LOCATION.—Lat 15°06'28", long 93°51'21", in NWiNEjNWJ sec.21, T.119 N., R.26 W., Hydrologic Unit 07010201, 5.1 mi (1.65 km) south of Buffalo. Owner: U.S. Geological Survey, AQUIFER.—Surficial sand of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter 14 in (0.03 m), depth 13 ft (1.0 m), screened 11 to 13 ft (3.1 to 1.0 m). DATUM.—Altitude of land-surface datum is 936 ft (285 m). Measuring point: Top of casing, 3-50 ft (1.07 m) above land-surface datum. PERIOD OF RECORD.—December 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 3.63 ft (1.11 m) below land-surface datum, July 11, 1978; lowest, 8.03 ft (2.15 m) below land-surface datum, Aug. 17, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 7 6.88 DEC 7 6.55 FEE 3 7.02 APR 2 1.80 JUN 18 5.76 AUG 6 5.98 NOV 5 6.60 JAN 1 6.91 MAR 9 6.91 MAY 26 5.55 JUL 23 5.91 SEP 3 6.70 434 GROUND-WATER LEVELS

WRIGHT COUNTY—Continued

450403093544501. Local number, 119N26W35DDA01. LOCATION.—Lat 45°04'03", long 93°54'45", in NEftSEjSEt sec.35, T.119 N., R.26 W., Hydrologic Unit 07010204, at Montrose. Owner: City of Montrose, well 1. AQUIFER.—Mount Simon Sandstone of Late Cambrian Age and Hinckley Sandstone of Late Precambrian Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 10 in (0.25 m), depth 693 ft (211 m), cased to 526 ft (160 m). DATUM.—Altitude of land-surface datum is 1,000 ft (305 m). Measuring point: Edge of breather pipe, 1.50 ft (0.46 m) above land-surface datum. PERIOD OP RECORD.—September 1976 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 73.54 ft (22.41 m) below land-surface datum, Sept. 28, 1981; lowest, 78.38 ft (23.89 m) below land-surface datum, Nov. 3, 1977.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 ,TO SEPTEMBER 1982 WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE • LEVEL NOV 9 76.50 MAR 15 76.72 MAY 14 76.27 JUL 12 76.41 SEP 22 76.45

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- 76 ce £ 77 < 3 i—o 78

^ 79 Q_ UJ Q 80 I I 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

119N26W35DDA01

451738093492402. Local number, 121N25W15BBA02. LOCATION.—Lat 45°17'38", long 93°49'24", in NEJNWJNWJ sec.15, T.121 N., R.25 W., Hydrologic Unit 07010203, 1.4 mi (2.2 km) south of 1-94. Owner: U.S. Geological Survey. AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Bored observation water-table well, diameter It in (0.03 m), depth 40 ft (12.2 m), screened 38 to 40 ft (11.6 to 12.2 m). DATUM.—Altitude of land-surface datum is 966 ft (294 m). Measuring point: Top of casing, 4.00 ft (1.22 m) above land-surface datum. PERIOD OF RECORD.—November 1976 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 33.00 ft (10.06 m) below land-surface datum, July 29, 1978; lowest, 35.85 ft (10.93 m) below land-surface datum, Mar. 1, 1982.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT . 7 35.02 DEC 7 35.19 FEB 3 35.80 APR 2 34.77 JUN 18 34.37 AUG .6 34.72 NOV 5 35.10 JAN 4 35.12 MAR 1 35.85 MAY 26 34.42 JUL 23 34.59 SEP 3 34.60 435 GROUND-WATER LEVELS

WRIGHT COUNTY—Continued 27 I I 28

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37 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

121N25W15BBA02 YELLOW MEn COL\TJs; COUNTY

444111095404701. Local number, 114N40W16BAC01. LOCATION.—Lat 44°4l'll", long 95°40'47", in SWJNEJNWJ sec.l6, T.114 N., R.40 W., Hydrologic Unit 07020004, 3-3 mi (5.2 km) west of Hanley Palls. Owner: Gilbert Orwoll. AQUIFER.—Buried sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused artesian well, diameter 5 in (0.13 m), depth 135 ft (41.1 m). DATUM.—Altitude of land-surface datum is 1,055 ft (322 m). Measuring point: Top of casing, 1.30 ft (0.40 m) above land-surface datum. REMARKS.—Water level affected by pumping from nearby irrigation well. PERIOD OP RECORD.—June 1976 to current year. EXTREMES FOR PERIOD OP RECORD.—Highest water level, 22.62 ft (6.89 m) below land-surface datum, Nov. 29, 1979; lowest, 31.63 ft (9.64 m) below land-surface datum, Aug. 14, 1976.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 1981 TO SEPTEMnER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 26 25.35 DEC 21 25.24 FEE 9 25.52 MAR 30 25.04 JUN 7 23.93 AUG 9 23-37

22 I T 1 I I I \ T 23

24

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26

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31

32 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

114N40W16BAC01 436 GROUND-WATER LEVELS

YELLOW MEDICINE COUNTY—Continued

444219096165501. Local number, 114N45W04DCD01. LOCATION.—Lat 44°42'19", long 96 o l6'55", In SEJSWJSEJ sec.4, T.114 N., R.45 W., Hydrologlc Unit 07020003, at Canby City Park. Owner: City of Canby, well 6. AQUIFER.—Surficial sand and gravel of Pleistocene Age. WELL CHARACTERISTICS.—Drilled unused water-table well, diameter 12 In (0.30 ra), depth 62 ft (18.9 m), screened HH to 68 ft (13.4 to 20.7 m). DATUM.—Altitude of land-surface datum Is 1,255 ft (382 m). Measuring point: Top of casing, 2.90 ft (0.88 m) above land-surface datum. PERIOD OP RECORD.—January 1964 to current year. EXTREMES FOR PERIOD OF RECORD.—Highest water level, 4.67 ft (1.42 m) below land-surface datum, June 5, 1965; lowest, 11.32 ft (3.45 m) below land-surface datum, Oct. 7, 1976.

WATER LEVEL, IN FEET BELOW LAND-SURFACE DATUM, WATER YEAR OCTOBER 198l TO SEPTEMBER 1982 WATER WATER WATER WATER WATER WATER DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL DATE LEVEL OCT 2 10.39 DEC 8 9.69 MAR 30 7.49 MAY 12 8.71 JUN 1 8.89 AUG 23 10.23 26 9.95 437 QUALITY OP GROUND WATER

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

HARD­ NESS MAGNE­ LOCAL DEPTH HARD­ NON CAR­ SIUM, IDENT- GEO- DATE SAM­ OP NESS BONATE DIS­ LOGIC OP PLING WELL, (MG/L (MG/L SOLVED STATION NUMBER PIER UNIT SAMPLE TIME DEPTH TOTAL AS AS (MG/L '(FEET) (FEET) CAC03) CAC03) AS MG) (00003) (72008) (00900) (95902) (00925)

DOUGLAS

454730095170602 127N37W23DAD02 SELECT P 1120TSH 82-08-25 1600 33.1 33 350 170 27 454912095170001 127N37W12CCB01 DON TWAIT 1120TSH 82-08-25 1630 18.0 18 180 25 13 454929095202801 127N37W09BDC01 ARLYS KAK 1120TSH 82-08-25 1030 18.4 18 230 53 19 455902095161511 129N36W18CBB11 RAY BEILK 1 1 20TSH 82-08-27 0730 . 30.6 31 280 87 23 455902095161512 129N36W18CBB12 RAY BEILK 1120TSH 82-08-27 0845 10.1 10 230 — 17 455926095122901 129N36W15BBB01 SCHOOL WE 1 1 20TSH 82-08-24 1300 18.0 18 250 26 17 460020095134301 129N36W09BBB01 DARRYL KL 1120TSH 82-08-24 1630 19.2 19 300 .00 26 460020095134302 129N36W09BBB02 DARRYL KL 1120TSH 82-08-24 1530 6.60 7 250 41 19 460604095134402 130N36W04BCC02 NO.CO.LIN 1120TSH 82-08-24 0930 6.80 7 330 55 25

KANABEC

455600093103001 040N23W23ABB OESTREICK 400HCKL 81-11-04 1200 10.0 220 .00 20 455600093103002 040N23W23ABB OESTREICK 112BRDO 81-11-04 1230 5.00 310 67 31

POPE

452639095401001 123N40W22DDC CP-2D OBSER 1 1 2BRDO 82-07-28 1745 133 340 .00 32 452652095114401 123N36W21DAA01 ALLEN THO 1120TSH 82-09-01 1745 41.4 41 300 .00 27 452652095114402 123N36W21DAA02 ALLEN THO 1120TSH 82-09-01 1915 13.7 14 270 43 23 452839095140501 123N36W07ADD01 DALE JOHN 1120TSH 82-09-01 1430 20.1 20 320 140 26 452938095081502 123N36W01ACA02 GLINT WEL 1120TSH 82-09-02 1400 16.1 16 390 190 33 452939095081501 123N36W01ACA01 GLINT WEL 1120TSH 82-09-02 1300 37.7 38 320 110 27 453050095H3701 124N36W28DDD01 GERALD VA 1120TSH 82-09-01 1215 22.0 22 310 59 27 453531095121901 125N36W33DAB02 THEO BRUH 1120TSH 82-08-28 0830 14.0 14 310 99 25 453830095185202 125N37W15ABB02 MIKE SAHL 1120TSH 82-08-26 1600 32.7 33 220 22 21 453832095185101 125N37W15ABB01 MIKE SAHL 1120TSH 82-08-26 1730 55.0 55 250 37 22 454004095120502 125N36W04ADA02 LEO MCKIG 1120TSH 82-08-26 1200 18.0 18 270 55 20 454024095192201 126N37W34CCC01 JIMMIE JA 1120TSH 82-08-26 0745 35.0 35 250 30 21 454033095170302 126N37W35DAD02 D. GARY R 1120TSH 82-08-26 0930 36.0 36 300 86 25 454228095123901 126N36W21DBB01 BRUCE HAN 1120TSH 82-08-26 1100 26.0 26 280 32 24

STEARNS

452526094420701 123N32W33AAD01 STEPHEN G 1120TSH 82-09-03 1830 20.0 20 300 32 26 452531094575801 123N34W33BBB01 DALLAS RA 1120TSH 82-09-03 1600 35.0 35 300 34 24 452636095064001 123N35W19DDA01 JOHN BROW 1120TSH 82-09-03 0940 20.0 20 220 3 .0 18 452647094571602 123N34W21DBD02 BORGERDIN 1 1 20TSH 82-09-02 1730 20.0 20 420 97 36 452721094293601 123N30W19ABA01 EDWIN TOR 1120TSH 82-09-03 2015 12.7 13 600 290 49 452731094585901 123N34W17CDB01 GEORGE RU 1120TSH 82-09-02 1830 22.0 22 280 55 23 452750095054001 123N35W09ADC01 HARLAN SA 1120TSH 82-09-03 1100 30.3 30 300 110 26 452750095054002 123N35W09ADC02 HARLAN SA 1120TSH 82-09-03 1245 21.0 21 470 220 41 452843094230501 123N30W12ADD01 LEANDER H 1120TSH 82-09-04 1415 34.0 34 320 31 24 452843094230502 123N30W12ADD02 LEANDER H 1120TSH 82-09-04 1445 15.0 15 440 140 33 453124094395201 124N32W26ADB01 RALPH TER 1120TSH 82-09-04 1130 27.0 27 220 41 18 453927094464201 125N33W01CDD01 HAROLD TO 1120TSH 82-09-04 1000 73.0 73 330 42 31 454428095051701 126N35W09BAD01 GERALD BE 1120TSH 82-08-27 1630 26.3 26 280 13 26 454428095051702 126N35W09BAD02 GERALD BE 1120TSH 82-08-27 1745 10.3 10 310 100 27

SWIFT

451510095391701 121N40W35ABB CP-18D OBSE 112BRDO 82-07-29 1250 171 380 .00 34 451945095465401 122N41W35CAC CP-16D OBSE 112BRDO 82-07-30 1155 147 710 320 70 452210095570701 122N42W21BBB CP-10D OBSE 112BRDO 82-07-29 1815 — 147 640 310 59 452322095384201 122N40W11DDA CP-3D OBSER 112BRDO 82-07-27 1915 163 120 .00 14 438 QUALITY OP GROUND WATER

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

SOLIDS, SOLIDS, NITRO- NITRO- SODIUM POTAS- ALKA- PLUO- SILICA, RESIDUE SUM OF GEN, GEN, PHOS- SODIUM, AD- SIUM, LINITY RIDE, SULFATE DIS- AT 180 CONSTI- AMMONIA ORGANIC PHORUS, DATE DIS- SORP- DIS- LAB DIS- DIS- SOLVED DEG. C TUENTS, DIS- DIS- DIS­ OP SOLVED TION SOLVED (MG/L SOLVED SOLVED (MG/L DIS- DIS- SOLVED SOLVED SOLVED SAMPLE (MG/L RATIO (MG/L AS (MG/L (MG/L AS 'SOLVED SOLVED (MG/L (MG/L (MG/L AS NA) AS K) CAC03) AS F) AS S04) SI02) (MG/L) (MG/L) AS N) AS N) AS P) (00930) (0093D (00935) (90410) (00950) (00945) (00955) (70300) (70301) (006o8) (00607) (00666)

DOUGLAS

82-08-25 2.0 .1 1.3 176 .2 60 22 433 .120 82-08-25 1.8 .1 <.l 158 .2 27 24 219 .020 .18 _ 82-08-25 1.8 .1 .7 178 <.l 11 21 — — 282 .050 .85 — 82-08-27 1.6 .0 1.0 195 .1 23 22 364 >030 .27 _ 82-08-27 5.2 .1 .8 238 .1 5-0 22 .020 — 82-08-24 3.0 .1 2.1 221 .2 24 2i _ 301 .020 .18 __ 82-08-24 3.9 .1 1.4 315 .2 17 24 349 -320 .18 __ 82-08-24 2.8 .1 1.2 205 .2 23 19 298 .040 .86 _ 82-08-24 1.9 .0 .8 275 .1 6.0 20 324 .100 .40 —

KANABEC

81-11-04 5.4 .2 1.2 240 .2 2.0 27 253 264 .020 81-11-04 11 .3 1.3 240 • 3 37 11 360 368 — <.010

POPE

82-07-28 13 • 3 3.0 379 .2 <1.0 29 414 8.3" 82-09-01 3.0 .1 2.2 311 .2 3.0 T 1 __ 335 .270 __ 82-09-01 8.0 .2 17 226 .2 24 24 376 .040 _ 82-09-01 2.3 .1 1.5 180 .2 20 27 403 .040 .16 _ 82-09-02 2.9 .1 .9 197 .1 36 2i _ 503 .070 ~ 82-09-02 2.3 .1 1.7 205 .2 47 21 394 .060 .64 82-09-01 3.9 .1 5.8 254 .1 24 21 380 .060 .44 _ 82-08-28 3-0 .1 1.3 211 .2 30 21 — — 363 .090 .21 __ 82-08-26 1.8 .1 1.6 202 .2 16 23 264 .060 .44 _ 82-08-26 1.8 .1 2.1 213 .2 37 23 293 .040 4.6 — 82-08-26 6.2 .2 1.2 220 .1 19 21 348 .050 .55 _ 82-08-26 2.6 .1 3.1 221 .2 14 23 306 .030 170 — 82-08-26 7.4 .2 2.4 212 .1 14 21 333 .020 .28 _ 82-08-26 3.4 .1 1.4 244 .2 27 20 320 .050 .55 —

STEARNS

82-09-03 6.6 .2 12 265 .2 24 20 372 .030 .47 82-09-03 4.2 .1 1.9 265 .1 40 25 349 .170 .53 _ 82-09-03 3.0 .1 1.3 218 .1 10 21 248 .030 .47 _ 82-09-02 5.8 • .1 8.0 326 .3 91 oc __ 514 .130 11 _ 82-09-03 19 .4 5.4 316 .2 160 1 "3 __ 652 .230 .57 — 82-09-02 4.7 .1 1.8 227 .2 21 23 328 .020 .48 82-09-03 2.2 .1 1.6 191 .1 14 25 368 .040 .06 _ 82-09-03 3.9 .1 2.2 253 .1 13 23 630 .130 .17 _ 82-09-04 4.0 .1 2.0 293 .2 38 15 369 .130 .17 — 82-09-04 5.4 .1 2.7 292 .2 40 8.1 572 .140 .26 -- 82-09-04 2.2 .1 1.5 180 .2 12 20 271 .020 .78 82-09-04 4.3 .1 2.5 293 .2 43 18 370 .060 .44 _ 82-08-27 4.0 .1 1.9 269 .2 36 24 -- 330 .090 .51 — 82-08-27 3.3 .1 1.5 210 .2 41 2"2 __ 390 .030 .77 —

SWIFT

82-07-29 23 .6 4.4 469 .2 4.0 33 484 482 82-07-30 51 .9 6.1 389 .2 480 32 1160 1050 _ _ 82-07-29 110 2.0 8.5 329 .4 610 15 1290 1170 __ __ 82-07-27 120 5.4 4.4 329 .6 34 23 439 424 __ — QUALITY OP GROUND WATER 439

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

PHOS­ PHORUS, MANGA­ CARBON, ORTHO, BORON, NESE, CARBON, ORGANIC DATE DIS­ DIS­ DIS­ ORGANIC DIS­ OP SOLVED SOLVED SOLVED TOTAL SOLVED SAMPLE (MG/L (UG/L (UG/L (MG/L (MG/L AS P) AS B) AS MM) AS C) AS C) (0067D (01020) (01056) (00680) (00681)

DOUGLAS

82-08-25 <.010 20 240 82-08-25 .020 10 330 82-08-25 .050 20 6 2.0 82-08-27 .020 20 4 82-08-27 <.010 10 3 82-08-24 <.010 20 480 1.7 82-08-24 .030 30 220 3.1 82-08-24 <.010 20 10 2.2 82-08-24 <.010 20 1 2.0

KANABEC

81-11-04 20 180 81-11-04 60 130

POPE

82-07-28 .080 110 69 2.9 82-09-01 .050 30 92 2.8 82-09-01 .010 160 2 2.7 82-09-01 <.010 330 2 1.1 82-09-02 <.010 290

STEARNS

82-09-03 .040 60 <1 1.8 82-09-03 .040 <10 450 1.7 82-09-03 .010 <10 <1 1.9 82-09-02 <.010 40 880 5.2 82-09-03 <.010 20 1100 4.4 82-09-02 .010 <10 47 1.2 82-09-03 .020 260 4 .8 82-09-03 .010 20 10 1.2 82-09-04 <.010 <10 94 2.5 82-09-04 <.010 20 840 1.7 82-09-04 <.010 50

SWIFT

82-07-29 .070 240 160 4.0 82-07-30 .060 310 220 2.3 82-07-29 <.010 690 260 5.2 82-07-27 .010 820 120 3.7 QUALITY OP GROUND WATER

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

SPE­ SPE­ CIFIC LOCAL CIFIC CON­ IDENT­ GEO- DATE CON­ DUCT­ I­ LOGIC OP DUCT­ ANCE PH PH TEMPER- STATION NUMBER FIER UNIT SAMPLE TIME ANCE LAB LAB ATURE (UMHOS) (UMHOS) (UNITS) (UNITS) (DEG C) (00095) (90095) (00400) (00403) (00010)

DOUGLAS 454730095170602 127N37W23DAD02 SELECT F 1120TSH 82-08-25 1600 8.2 11.0 454912095170001 127N37W12CCB01 DON TWAIT 1120TSH 82-08-25 1630 8.1 10.5 454929095202801 127N37W09BDC01 ARLYS KAK 1120TSH 82-08-25 1030 8.3 9.0 455902095161511 129N36W18CBB11 RAY BEILK 1120TSH 82-08-27 0730 8.3 8.5 455902095161512 129N36W18CBB12 RAY BEILK 1120TSH 82-08-27 0845 8.3 13.0 455926095122901 129N36W15BBB01 SCHOOL WE 1 1 20TSH 82-08-24 1300 7-9 9.5 460020095134301 129N36W09BBB01 DARRYL KL 1120TSH 82-08-24 1630 7.8 9.0 460020095134302 129N36W09BBB02 DARRYL KL 1120TSH 82-08-24 1530 7.9 17.0 460604095134402 130N36W04BCC02 NO.CO.LIN 1120TSH 82-08-24 0930 8.0 14.5

HUBBARD 464940094593001 139N34W28BCC01 1120TSH 81-12-02 1100 560 608 7.3 7.8 11.5 1120TSH 82-06-05 1100 780 816 7.6 7.8 12.0 465035095000001 139N34W20ADC01 1120TSH 81-12-02 1130 870 957 7-4 7.8 10.0 1120TSH 82-06-05 1130 630 687 7.8 7.8 10.5 465315094554001 139N34W01BCA01 1120TSH 81-12-02 1300 410 395 6.9 7.8 10.0 1120TSH 82-06-05 1300 560 587 7-7 7.9 11.0 465515094411001 140N32W26ABA01 1120TSH 82-06-05 1330 375 397 7.9 8.0 10.5 465515095061501 140N35W28AAA01 1120TSH 81-12-02 1200 400 424 6.8 7.8 9.0 1120TSH 82-06-05 1200 480 527 7-7 7.8 11.5

KANABEC 455600093103001 040N23W23ABB OESTREICK 400HCKL 81-11-04 1200 410 428 7-7 7.6 8.0 455600093103002 040N23W23ABB OESTREICK 112BRDO 81-11-04 1230 650 635 8.3 7.9 12.0

MORRISON 455030094191501 039N32W27CBB01 1120TSH 81-11-24 1300 235 244 7.2 8.2 11.5 1120TSH 82-06-03 1430 235 261 8.3 7.9 8.5 455215094121501 039N31W16DAC01 1120TSH 81-11-24 1345 170 179 7.1 8.0 9.5 1120TSH 82-06-03 1500 175 186 8.1 8.0 9.0 460030094210001 041N32W26BCA01 1120TSH 81-11-24 1200 340 364 7.4 8.0 12.5 1120TSH 82-06-03 1400 350 367 8.0 7-8 11.0 460345094215001 130N29W18DDD02 1120TSH 82-06-03 1300 220 231 6.7 6.9 11.5 460600094191501 042N32W24DCC01 1120TSH 81-10-02 0800 315 340 7.4 7.9 6.5 460725094211501 042N32W14BBC01 1120TSH 81-11-24 1130 340 352 7.3 7-9 9.5 1120TSH 82-06-03 1330 360 371 7.8 7.8 9-5

OTTER TAIL 460900095150001 131N36W19AAA01 1120TSH 81-10-01 1330 490 532 7-3 7.8 8.5 461235095162501 132N37W25DDC01 1120TSH 81-10-01 1400 480 530 7.2 7.6 9.5 1120TSH 81-12-03 1330 560 568 6.6 7-7 8.0 1120TSH 82-06-07 1500 560 602 7.8 7.8 9.0 461445095150001 132N36W18ADD01 1120TSH 81-10-01 1200 470 520 7.4 7.7 13.5 461445095201501 132N37W16ADC01 1120TSH 81-10-01 1230 455 498 7.2 7.7 9.0

POPE 452639095401001 123N40W22DDC CP-2D OBSER 1 1 2BRDO 82-07-28 1745 600 696 7.5 452652095114401 123N36W21DAA01 ALLEN THO 1120TSH 82-09-01 1745 525 561 7.4 7.8 9.0 452652095114402 123N36W21DAA02 ALLEN THO 1120TSH 82-09-01 1915 590 615 7.7 7.9 10.0 452839095140501 123N36W07ADD01 DALE JOHN 1120TSH 82-09-01 1430 675 656 7.6 8.0 9.5 452938095081502 123N36W01ACA02 GLINT WEL 1120TSH 82-09-02 1400 800 817 7.7 7.9 10.0 452939095081501 123N36W01ACA01 GLINT WEL 1120TSH 82-09-02 1300 650 647 7.5 7.9 9.5 453050095113701 124N36W28DDD01 GERALD VA 1120TSH 82-09-01 1215 630 627 7.9 7.8 10.5 453531095121901 125N36W33DAB02 THEO BRUH 1120TSH 82-08-28 0830 690 641 8.0 8.1 11.0 453830095185202 125N37W15ABB02 MIKE SAHL 1120TSH 82-08-26 1600 430 443 8.0 8.2 14.0 453832095185101 125N37W15ABB01 MIKE SAHL 1120TSH 82-08-26 1730 480 493 7.9 8.5 454004095120502 125N36W04ADA02 LEO MCKIG 1120TSH 82-08-26 1200 620 587 8.9 8.1 13.5 454024095192201 126N37W34CCC01 JIMMIE JA 1120TSH 82-08-26 0745 490 507 8.3 8.2 8.0 454033095170302 126N37W35DAD02 D. GARY R 1120TSH 82-08-26 0930 650 589 8.0 8.3 10.0 454228095123901 126N36W21DBB01 BRUCE HAN' 1120TSH 82-08-26 1100 600 539 8.5 8.2 10.5 QUALITY OP GROUND WATER 441

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

NITRO­ CHLO­ GEN, CALCIUM RIDE, N02+N03 IRON, DATE DIS­ DIS­ DIS­ DIS­ OP SOLVED SOLVED SOLVED SOLVED SAMPLE (MG/L (MG/L (MG/L (UG/L AS CA) AS CL) AS N) 'AS PE) (00915) (00910) (0063D (01046)

DOUGLAS 82-08-25 95 1.5 26 6 82-08-25 52 5.9 <.10 170 82-08-25 61 7.1 12 6 82-08-27 75 12 20 39 82-08-27 61 2.3 1.5 64 82-08-21 71 4.1 5.7 120 82-08-21 79 3.7 <.10 4200 82-08-21 67 7.6 7.9 120 82-08-21 91 5.7 1.8 39

HUBBARD 81-12-02 82 21 11 30 82-06-05 110 33 18 60 81-12-02 120 80 30 10 82-06-05 100 32 22 60 81-12-02 71 12 5.0 20 82-06-05 84 39 5.5 30 82-06-05 64 1.1 1.7 10 81-12-02 73 8.1 4.7 <10 82-06-05 77 15 6.1 40

KANABEC 81-11-01 57 2.9 .03 4100 81-11-01 72 46 3.2 230

MORRISON 81-11-21 30 5.7 13 10 82-06-03 35 4.1 14 10 81-11-21 23 1.4 1.6 20 82-06-03 26 1.6 1.3 10 81-11-21 41 14 4.3 20 82-06-03 50 11 2.4 10 82-06-03 17 29 3.8 140 81-10-02 51 2.2 3.2 10 81-11-21 50 12 8.9 40 82-06-03 56 15 10 30

OTTER TAIL 81-10-01 81 13 9.7 <10 81-10-01 82 6.5 5.4 800 81-12-03 80 8.4 7.3 880 82-06-07 85 9.7 8.2 40 81-10-01 73 4.6 3.8 10 81-10-01 71 14 .04 1000

POPE 82-07-28 83 1.5 <.10 1800 82-09-01 71 2.1 .12 4500 82-09-01 70 7.7 15 4 82-09-01 85 48 19 11 82-09-02 100 44 33 <3 82-09-02 83 26 14 40 82-09-01 81 16 11 5 82-08-28 83 28 10 11 82-08-26 55 3.4 4.7 13 82-08-26 61 9.4 1.1 59 82-08-26 77 27 10 4 82-08-26 66 7.7 8.0 <3 82-08-26 78 16 9.3 4 82-08-26 71 12 3.3 8 442 QUALITY OP GROUND WATER

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

SPE­ SPE­ CIFIC LOCAL CIFIC CON­ IDENT­ GEO­ DATE CON­ DUCT­ I­ LOGIC OP DUCT­ ANCE PH PH TEMPER- STATION NUMBER FIER UNIT SAMPLE TIME ANCE LAB LAB ATURE (UMHOS) (UMHOS) (UNITS) (UNITS) (DEG C) (00095) (90095) (00400) (00403) (00010)

STEARNS

452526094420701 123N32W33AAD01 STEPHEN G 1120TSH 82-09-03 1830 630 624 7.7 7.7 12.0 452531094575801 123N34W33BBB01 DALLAS RA 1120TSH 82-09-03 1600 590 585 8.2 7.7 10.0 452636095064001 123N35W19DDA01 JOHN BROW 1120TSH 82-09-03 0940 410 424 8.2 8.0 9.5 452647094571602 123N34W21DBD02 BORGERDIN 1120TSH 82-09-02 1730 830 835 7.4 7.6 11.5 452721094293601 123N30W19ABA01 EDWIN TOR 1120TSH 82-09-03 2015 — 1190 7.4 7.6 11.0 452731094585901 123N34W17CDB01 GEORGE RU 1120TSH 82-09-02 1830 590 566 7.9 7.8 11.0 452750095054001 123N35W09ADC01 HARLAN SA 1120TSH 82-09-03 1100 605 602 8.3 7.9 9.0 452750095054002 123N35W09ADC02 HARLAN SA 1120TSH 82-09-03 1245 960 1000 7.7 7.7 9.5 452843094230501 123N30W12ADD01 LEANDER H 1120TSH 82-09-04 1415 660 643 7.5 7.7 8.0 452843094230502 123N30W12ADD02 LEANDER H 1120TSH 82-09-04 1445 885 900 7.2 7.6 11.0 453124094395201 124N32W26ADB01 RALPH TER 1 1 20TSH 82-09-04 1130 430 454 7.9 7.7 8.5 453927094464201 125N33W01CDD01 HAROLD TO 1 1 20TSH 82-09-04 1000 630 641 7.5 8.0 9.0 454428095051701 126N35W09BAD01 GERALD BE 1120TSH 82-08-27 1630 600 554 7-9 7.8 8.5 454428095051702 126N35W09BAD02 GERALD BE 1120TSH 82-08-27 1745 700 650 7.7 8.0 11.5

SWIFT

451510095391701 121N40W35ABB CP-18D OBSE 112BRDO 82-07-29 1250 680 826 7.3 7.4 451945095465401 122N41W35CAC CP-16D OBSE 112BRDO 82-07-30 1155 1080 1440 7-3 7.3 13.0 452210095570701 122N42W21BBB CP-10D OBSE 1 1 2BRDO 82-07-29 1815 1330 1600 7.1 7.3 9.5 452322095384201 122N40W11DDA CP-3D OBSER 112BRDO 82-07-27 1915 565 704 7.8 7-9 12.0

WADENA

462215094591501 134N34W32DCB02 1120TSH 81-11-27 1200 515 551 6.9 7.5 10.5 1120TSH 82-06-04 1100 600 632 7.3 7.7 9.0 462530095050001 134N35W10CDC01 1120TSH 81-11-27 1300 605 653 7.0 7.6 13.0 1 1 20TSH 82-06-04 1130 585 657 7.4 7.6 11.0 462815094532001 135N33W30DCD01 1120TSH 81-11-27 1400 445 475 7.0 7.9 8.5 1120TSH 82-06-04 1500 460 482 7.8 7.9 9.5 463000094583001 135N34W16DBC01 1120TSH 81-11-27 1330 390 458 6.8 7.8 8.0 1120TSH 82-06-04 1400 455 467 7.8 7.8 9.0 464300094533001 137N33W06AAA01 1120TSH 82-06-04 1200 535 557 6.8 6.9 9.5 443 QUALITY OP GROUND WATER

WATER QUALITY DATA, WATER YEAR OCTOBER 1981 TO SEPTEMBER 1982

NITRO­ CHLO­ GEN, CALCIUM RIDE, N02+N03 IRON, DATE DIS­ DIS­ DIS­ DIS­ OP SOLVED SOLVED SOLVED SOLVED SAMPLE (MG/L (MG/L (MG/L (UG/L AS CA) AS CL) AS N) AS PE) (00915) (00910) (0063D (01046)

STEARNS

82-09-03 76 13 7.8 <3 82-09-03 80 8.6 .77 1700 82-09-03 59 2.3 .42 <3 82-09-02 110 31 2.3 120 82-09-03 160 53 .18 33 82-09-02 75 25 4.0 <3 82-09-03 78 31 17 35 82-09-03 120 44 52 <3 82-09-04 90 14 <.10 5300 82-09-04 120 31 35 <3 82-09-04 59 5.8 10 <3 82-09-04 83 7.8 .63 1000 82-08-27 70 5.4 <.10 960 82-08-27 80 26 14 23

SWIFT

82-07-29 98 1.6 <.10 1400 82-07-30 170 1.5 <.10 4700 82-07-29 160 6.0 <.10 1800 82-07-27 24 5.0 <.10 610

WADENA

81-11-27 84 14 3.3 2000 82-06-04 93 20 5.8 1500 81-11-27 100 9.9 .18 2500 82-06-04 96 11 <.10 2200 81-11-27 66 9.3 12 10 82-06-04 70 9.8 12 60 81-11-27 64 1.7 .03 2000 82-06-04 70 2.4 .63 3000 82-06-04 37 110 1.1 4900 £»«<>•-- *-~Vv 445 INDEX

Page Page Accuracy of field data and computed results... 17 Cedar Grove Pond at Eagan...... 311 Acre-foot, definition of...... 3 Cedar River near Austin...... 287,333 Adenosine triphosphate, definition of...... 3 Cells/volume, definition of...... 9 Afton, St. Croix River at...... 237-242 Cfs/day, definition of...... 9 Aitkin, Mississippi River at...... 50,325 Champlin, Elm Creek near...... 76,327 AKeley, Williams Lake near...... 31-40 Chanarambie Creek near Edgerton...... 303 Alden, Poster Creek near...... 299 Chanhassen, Lake Riley Outlet near...... 306 Aldrich, Leaf River near...... 294 Lake Susan Outlet near...... 164 Algae, definition of...... 3 Chatfield, Mill Creek near...... 302 Algal growth potential, definition of...... 3 Chemical oxygen demand, definition of...... 9 Altura, South Pork Whitewater River near...... 302 Chippewa River below diversion near Watson.... 305 Analyses of water-quality samples collected diversion near Watson...... 305 at partial-record stations...... 307-324 Chippewa River near Milan...... 123,323 Anoka, Mississippi River near...... 77-80,327 Chlorophyll, definition of...... 9 Appleton, Pomme de Terre River at...... 117,328 Clearwater, Mississippi River at...... 295 Aquifer, definition of...... 3 Cloverdale, Kettle River near...... 223 Arendahl, Pine Creek near...... 302 Cobb River tributary near Mapleton...... 299 Artesian, definition of...... 3 Collection and computations of data, Artificial substrate, definition of...... 12 surface-water records...... 15 Ash mass, definition of...... 3 Collection and examination of data, Austin, Cedar River near...... 287,333 water-quality records...... 17 Collection of the data, ground-water-level Bacteria, definition of...... 3 records...... 18 Balatan, Cottonwood River tributary near...... 298 Color unit, definition of...... 9 Bassett Creek at Pruen Mill in Golden Valley.. 297 Concord, Milliken Creek near...... 301 (at State Highway 55) in Golden Valley...... 297 Contents, definition of...... 9 in Golden Valley...... 88,327 Control, definition of...... 9 North Pork, at Crystal...... 297 Cooperation...... 1 Bassett Creek basin, measurements at Cottage Grove, Mississippi River at Grey miscellaneous sites in...... 297 Cloud Island near...... 206-212 Bear Creek on Belt Line at Rochester...... 301 Cottonwood River near New Ulm...... 145,329 South Pork, near Grand Meadow...... 302 near Springfield...... ?9<3 Beaver Creek at Beaver Palls...... 298 tributary near Balatan...... 298 tributary above Slayton...... 303 tributary No. 2 near Sanborn...... 299 tributary No. 2 near Slayton...... 303 Courtland, Little Cottonwood River near...... 146,329 Beaver, Whitewater River near...... 269,332 Crooked Creek at Freeburs;...... 303 Beaver Falls, Beaver Creek at...... 298 Cross Lake, Pine River at Cross Lake Dam, at.. 52 Becida, Hennepin Creek near...... 294 Pine River Reservoir at...... 51 Bed material, definition of...... 3 Crow River at Rockford...... 67,326 Bemidji, Mississippi River at...... 294 Middle Pork near Spicer...... 66,326 Big Lake, Elk River near...... 65,326 North Pork, at Paynesville...... 296 Big Marine Lake East Bay near Forest Lake..... 322 tributary near Paynesville...... 296 near Forest Lake...... 324 South Fork, near Mayer...... 296 outlet of, at County Road 4 near Crow River basin, gaging station records in... 66-67 Forest Lake...... 324 high-flow partial-record stations in...... 296 South Bay near Forest Lake...... 323 Crow Wing River at Nimrod...... 294 Big Sioux river basin, high-flow partial- near Pillager...... 56,326 record stations in...... 303-304 Crow Wing River basin, gaging station records Big Stone City, SD, Whetstone River near..... 96-98,327 in...... 53-56 Big Stone Lake at Ortonville...... 99 high-flow partial-record stations in...... 294-295 Biochemical oxygen demand, definition of...... 3 Crystal, North Pork Bassett Creek at...... 297 Biomass, definition of...... 3 Cubic foot per second, definition of...... 9 Blackhawk Lake at Eagan...... 309 Cubic feet per second per square mile, Blue Earth, East Branch Blue Earth River definition of...... tributary near...... 299 Blue Earth River, East Branch, near Bricelyn.. 299 Data, accuracy of...... 17 East Branch, tributary near Blue Earth...... 299 ground-water level records, collection of.. 18 East Branch, near Walters...... 299 other available...... 17 Blue Earth River near Rapidan...... 148,330 surface-water, collection and Blue-green algae, definition of...... 11 computation of...... 15 Boesel Pond at Eagan...... 311 water-quality records, collection and Bottom material, definition of...... 9 examination of...... 17 Brainerd, Gull Lake near...... 54 Day, Stanchfield Creek tributary near...... 297 Gull River at Gull Lake Dam near...... 55 Deer River, Mississippi River at Bricelyn, East branch Blue Earth River near... 299 Winnibigoshish Dam near...... 30 Brownton, Buffalo Creek tributary near...... 2§6 Winnibigoshish Lake near...... 29 Bryant Lake Inlet near Eden Prairie...... 172-173 Definition of terms...... 3 Bryant Lake Outlet near Eden Prairie...... 174 Delft, Watonwan River near...... 299 Buffalo Creek tributary near Brownton...... 296 Des Moines River at Jackson...... 288,333 Burnsville, Minnesota River at...... 175-181 tributary near Jackson...... 303 Burr, Florida Creek near...... 297,313-314 tributary No. 2 near Lakefield...... 303 Burview Park Pond at Eagan...... 312 Des Moines River basin, gaging station records in...... 288 Calumet, Swan River (tributary to Mississippi high-flow partial-record stations in...... 303 River), near...... 46,325 Dexter, Rose Creek tributary near...... 303 Canby, Lac qui Parle River near...... 118-120 Diatoms, definition of...... 11 Lazarus Creek tributary near...... 297 Dillon-Syltie Impoundment Inlet near Porter.. 125-128 Cannon River at Northfield...... 301 Dillon-Syltie Impoundment Outlet near Porter. 137-140 at Welch...... 301 Dillon-Syltie Impoundment Pool near Porter... 129-136 Cannon River basin, gaging stations in...... 259 Discharge at partial-record stations and high-flow partial-record stations in...... 301 miscellaneous sites...... 289-306 Cascade Creek at Rochester...... 301 High-flow partial-record stations...... 291-304 Cat River near Nimrod...... 294 Miscellaneous sites...... 305-306 INDEX Page Discharge, definition of...... 9 Glaisby Brook near Kettle River...... 300 Discontinued gaging stations...... 25-28 Golden Valley, Bassett Creek at Fruen Dissolved, definition of...... 9 Mill in...... 297 Diversity index, definition of...... 9 Bassett Creek (at Highway 55) in...... 297 Donaldson's Pond at Eagan...... 312 Bassett Creek in...... 88,327 Downstream order and station number, Goodhue, Trout Brook tributary near...... 302 definition of...... 14 Grand Meadow, South Fork Bear Creek near. 302 Drainage area, definition of...... 9 Grand Rapids, Mississippi River at...... 44,325 Drainage basin, definition of...... 9 Mississippi River near...... 305 Dry Creek near Jeffers...... 144 Pokegama Lake near. 43 Dry mass, definition of...... 3 Granite Falls, Yellow Medicine River near..... 141,329 Dunnel, Fourmile Creek near...... 303 Green algae, definition of...... 11 Duschee Creek near Lanesboro...... 302 Gribben Creek near Whalan...... 302 around water, chemical analyses of...... 437-443 Eagan, Blackhawk Lake at...... 309 Ground-water-level records, by county...... 338-436 Boesel Pond at...... 311 Ground-water levels, collection of data...... 18 Burview Park Pond at...... 312 in hydrologic conditions...... 2 Cedar Grove Pond at...... 311 Gull Lake near Brainerd...... 54 Donaldson's Pond at...... 312 Gull River at Gull Lake Dam, near Brainerd.... 55 Pish Lake at...... 310 Holland Lake at...... 307 Hardness of water, definition of...... 10 Jensen Lake at...... 311 Hardwick, Mound Creek near...... 304 Lakeside Estate Lake at...... 311 Mound Creek tributary at...... 304 Langhoven Lake at...... 312 Hastings, Mississippi River at Lock Lemay Lake at...... 312 and Dam 2...... 215-221 McCarthy Lake at...... 311 Hawk Creek near Maynard...... 298 Shanahan Pond at...... 312 Henderson, High Island Creek near...... 153,330 Slater's Acres Pond at...... 311 Hennepin Creek near Becida...... 294 Thomas Lake at...... 308 High-flow partial-record stations...... 291-304 Wilderness Lake at...... 311 High Island Creek near Henderson...... 153,330 Eagle Point Lake Inlet near Lake Elmo...... 306 Hill City, Smith Creek near...... 294 near Oakdale...... 232-233 Hillman Creek near Pierz...... 295 East Branch Blue Earth River near Bricelyn.... 299 Hinckley, Mission Creek near...... 300 near Walters...... 299 Holland Lake at Eagan...... 307 tributary near Blue Earth...... 299 Houston, Root River near...... 285,333 East Branch Raven Stream near New Prague...... 300 South Fork Root River near...... 286,333 Eden Prairie, Bryant Lake Inlet near...... 172-173 Hydrologic bench-mark station, definition of.. 14 Bryant Lake Outlet near...... 174 Hydrologic conditions...... 2 Edgerton, Chanarambie Creek near...... 303 graphs of...... 4-8 Elba, North Pork Whitewater River near...... 264- 268,332 ground-water levels in...... 2 Elk River basin, gaging station records in.... 64-65 precipitation and streamflow in...... 2 high-flow partial-record stations in...... 296 water quality in...... 2 Elk River near Big Lake...... 65,326 Hydrologic unit, definition of...... 10 Elm Creek- near Champlin...... 76,327 Empire, Vermillion River near...... 251- •258,331 Introduction...... 1 Explanation of ground-water level records..... 18 Instantaneous discharge, definition of...... 9 of stage and water-discharge records...... 15 Iowa River basin, gaging station records in. 287 of water-quality records...... 17 high-flow partial-record stations in...... 303 Ivanhoe, North Branch Yellow Medicine Factors for converting Inch-Pound Units River near...... 298 International System (SI) Units ...... Inside back cover Jackson, Des Moines River at...... 288,333 Paribault, Straight River near...... 259,331 tributary near...... 303 Pecal coliform bacteria, definition of...... 3 Jeffers, Dry Creek near...... 144 Pecal streptacoccal bacteria, definition of... 3 Jensen Lake at Eagan...... 311 Federal Dam, Leech Lake at...... 41 Johnson Creek near St. Augusta...... 295 Leech Lake River at...... 42 tributary at Luxemburg...... 295 Fish Lake at Eagan...... 310 tributary No. 2 near St. Augusta...... 295 Fish Lake Inlet after wetland near Jordan, Minnesota River near...... 154-163,330 Maple Grove...... 72-73 Sand Creek tributary No. 2 near...... 300 before wetland near Maple Grove...... 70-71 Fish Lake Outlet near Interstate 94 in Kanaranzi Creek tributary No. 2 near Wilmont.. 304 Maple Grove...... 74-75 Kellogg, Zumbro River at...... 263,332 Florida Creek near Burr...... 297,313-314 Kenyon, Little Cannon River tributary near.... 301 Foley, Stony Brook tributary near...... 296 Kettle River, Glaisby Brook near...... 300 Forest Lake, Big Marine Lake East Bay near.... 322 Kettle River below Sandstone...... 222,331 Big Marine Lake near...... 324 near Cloverdale...... 223 Big Marine Outlet at County Road 4 near..... 324 Knife River near Mora*...... 224,331 Big Marine Lake South Bay near...... 323 Fort Ripley, Mississippi River near...... 295 La Bolt Impoundment Inlet at La Bolt, SD... 101-103 Foster Creek near Alden...... 299 La Bolt Impoundment Outlet at La Bolt, SD., 110-111 Fountain Creek near Montrose...... 296 La Bolt Impoundment Pool at La Bolt, SD.... 104-109 Fourmile Creek near Dunnell...... 303 La Bolt, SD, La Bolt Impoundment Inlet at.. 101-103 Freeburg, Crooked Creek at...... 302 La Bolt Impoundment Outlet at...... 110-111 Fridley, Mississippi River at...... 81-87 La Bolt Impoundment Pool at...... 104-109 Lac qui Parle, Lac qui Parle River near.... 121,328 Gage height, definition of...... 9 Minnesota River near...... 122,328 Gaging station, definition of...... 9 Lac qui Parle River near Canby...... 118-120 Gaging stations, discontinued...... 25-28 near Lac qui Parle...... 121,328 records...... 29-288 West Branch near Gary, SD...... 297 ,315-316 Garden City, Watonwan River near...... 147,330 Lake Elmo, Eagle Point Lake Inlet near..... 306 Garrison, Mille Lacs Lake at...... 68 Lake Elmo Inlet from Eagle Point Lake near Garvin Brook at Stockton...... 270,332 Oakdale...... 234 near Minnesota City...... 274-276,332 Lake Elmo Outlet on County Road 17 near Garvin Brook basin, gaging-station Oakdale...... 235-236 records in...... 270-277 Lakefield, Des Moines River tributary Gary, SD, Webber Impoundment Inlet near...... 317 Mo. 2 near...... 303 Webber Impoundment near...... 318-321 Lake George Inlet near Oak Grove...... 305 West Branch Lac qui Parle River near...... 297,315-316 Lake Riley Inlet near iShakopee...... 165 Gaylord, Middle Branch Rush River near...... 300 Lake Riley Outlet near Chanhassen...... 306 447 INDEX Page Page Lake Susan Outlet near Chanhassen...... 164 Minnesota River at Burnsville...... 175-181 Lakes'and Reservoirs: at Fort Snelling State Park, at St. Paul.... 182-188 Big Stone Lake at Ortonville...... 99 at Mankato...... 150-152,330 Gull Lake near Brainerd...... 54 at Montevideo...... 124,329 Leech Lake at Federal Dam...... 41 at Ortonville...... 100,327 Mille Lacs Lake at Garrison...... 68 near Jordan...... 154-163,330 Pokegarna Lake near Grand Rapids...... 43 near Lac qui Parle...... 122,328 Pine River Reservoir at Cross Lake...... 51 Minnesota River basin, gaging station Sandy Lake at Libby...... 47 records in...... 96-188 Williams Lake near Akeley...... 31-40 high-flow partial-record stations In...... 297-300 Winnibigoshish Lake near Deer River...... 29 measurements at miscellaneous sites in...... 305-306 Lakeside Estate Lake at Eagan...... 311 Miscellaneous analysis of streams in Lanesboro, Duschee Creek near...... 302 Minnesota, water-quality data at Root River near...... 284,333 streamflow stations...... 325-333 South Branch Root River at...... 302 Miscellaneous sites, discharge Langhoven Lake at Eagan...... 312 measurements at...... 305-306 Lazarus Creek tributary near Canby...... 297 Mission Creek near Hinckley...... 300 Leaf River near Aid rich...... 294 Mississippi River at Aitkin...... 50,325 Leech Lake at Federal Dam...... 41 at Bemidji...... 294 Leech Lake River at Federal Dam...... 42 at Clearwater...... 295 Lemay Lake at Eagan...... 312 at Fifth Street at Newport...... 199-205 Le Sueur River near Rapidan...... 149,330 at Ford Plant at St. Paul...... 89-95,305 tributary near Mankato...... 299 at Fridley...... 81-87 Lester Prairie, Otter Creek near...... 296 at Grand Rapids...... 44,325 Otter Creek tributary near...... 296 at Grey Cloud Island near Cottage Grove..... 206-212 Libby, Mississippi River below Sandy at Industrial Molasses, at St. Paul...... 192-198 River near...... 49 at lock and dam 2, at Hastings...... 215-221 Sandy Lake at...... 47 at lock and dam 3, near Red Wing...... 244-250 Sandy River at Sandy Lake Dam at...... 48 at lower St. Anthony Falls lock and dam, Lindstrom, Sunrise River near...... 226,331 at Minneapolis...... 305 List of counties for which water-level at Nininger...... 213-214 records are published...... VIII-XI at Prescott, WI...... 243,331 List of gaging stations, In downstream order, at St. Paul...... 189-191,331 for which records are published...... VI-VII at Winnibigoshish Dan, near Deer River...... 30 Little Cannon River tributary near Kenyon.... 301 at Winona...... 278-283,333 Little Chippewa River near Starbuck...... 297 below Sandy River near Libby...... 49 Little Cottonwood River near Courtland...... 146,329 near Anoka...... 77-80,327 Little Sioux River near Spafford...... 304 near Fort Ripley...... 295 Long Creek near Potsdam...... 302 near Grand Rapids...... 305 Long Prairie, Long Prairie River at...... 53,326 near Royalton...... 57-63,326 Long Prairie River at Long Prairie...... 53,326 Montevideo, Minnesota River at...... 124,329 Luverne, Rock River at...... 304 Spring Creek near...... 298 Luxemburg, Johnson Creek tributary at...... 295 Montgomery, Rice Lake tributary near...... 300 Montrose, Fountain Creek near...... 296 Mankato, Le Sueur River tributary near...... 299 Mora, Knife River near...... 224,331 Minnesota River at...... 150- 152,330 Mound Creek near Hardwick...... 304 Map of Minnesota ground-water observation tributary at Hardwick...... 304 wells...... 336-337 high-flow partial-record stations...... 292-293 National Geodetic Vertical Datum of 1929 water-discharge stations ...... 20-21 (NGVD), definition of...... 10 water-quality stations...... 22-23 National stream-quality accounting network Maple Grove, Fish Lake Inlet after (NASQAN), definition of...... 14 wetland near...... 72-73 Natural substrate, definition of...... 12 Fish Lake Inlet before wetland near...... 70-71 Newport, Mississippi River at Fifth Pish Lake Outlet near Interstate 94 in...... 74-75 Street at...... 199-205 Maple River near Rapidan...... 300 New Prague, East Branch Raven Stream near..... 300 tributary near Mapleton...... 299 Sand Creek near...... 300 Mapleton, Cobb River tributary near...... 299 New Ulm, Cottonwood River near...... 145,329 Maple River tributary near...... 299 Nlmrod, Cat River near...... 294 Marshall, Prairie Ravine near...... 298 Crow Wing river at...... 294 Redwood River near...... 142,329 Nininger, Mississippi River at...... 213-214 Mayer, South Fork Crow River near...... 296 North Branch Root River tributary near Maynard, Hawk Creek near...... 298 Stewartvlle...... 302 McCarthy Lake at Eagan...... 311 North Branch Yellow Medicine River near Mean concentration, definition of...... 12 Ivanhoe...... 29 8 Mean discharge, definition of...... 9 tributary near Wilno...... 298 Methylene blue active substance, North Fork Bassett Creek at Crystal...... 297 definition of...... 10 North Fork Crow River at Paynesvllle...... 296 Metamorphlc stage, definition of...... 10 tributary ner Paynesville...... 296 Micrograms per gram, definition of...... 10 North Fork Whltewater River near Elba...... 264-268,332 Micrograms per kilograms, definition of...... 10 Northfield, Cannon River at...... 301 Micrograms per liter, definition of...... 10 Numbering system for wells and Middle Branch Rush River near Gaylord...... 300 miscellaneous sites...... 14 Middle Fork Crow River near Splcer...... 66,326 Milan, Chippewa River near...... 123,328 Oak Grove, Lake George Inlet near...... 305 Mill Creek near Chatfield...... 302 Oakdale, Eagle Point Lake Inlet near...... 232-233 Mille Lacs Lake at Garrison...... 68 Lake Elmo Inlet from Eagle Point Lake near.. 234 Milligrams per liter, definition of...... 10 Lake Elmo Outlet on County Road 17 near..... 235-236 Milligrams of carbon per area or volume per Odessa, Yellow Bank River near...... 112-116,328 unit time for periphyton, macro- Onamia, Robinson Brook near...... 297 phytes, and phytoplankton...... 11 Rum River tributary near...... 297 Milligrams of oxygen per area or volume per Organic mass, definition of...... 3 unit time for periphyton, macro- Organism, definition of...... 10 phytes, phytoplankton...... 11 count/area, definition of...... 10 Milliken Creek near Concord...... 301 count/volume, definition of...... 10 Minneapolis, Mississippi River at Lower Ormsby, South Fork Watonwan River near...... 299 St. Anthony Falls lock and dam at...... 305 Ortonville, Big Stone Lake at...... 99 Mlnneota, South Branch Yellow Medicine Minnesota River at...... 100,327 Rive r at...... 29 8 Other data available...... 17 Minnesota City, Garvin Brook near...... 274-276,332 Otsego Creek near Otsego...... 296 448 INDEX Page Otsego, Otsego Creek near...... Rush Creek near Rushford...... 303 Otter'Creek near Lester Prairie...... Rushford, Rush Creek near...... 303 tributary near Lester Prairie...... Rush River, Middle Branch near "Jaylord. 300 Outlet Creek tributary near Starbuck. St. Augusta, Johnson Creek near...... 295 Palisade, Willow River below...... 294 Johnson Creek tributary No. 2 near...... 295 Parameter code numbers...... 10 St. Croix Falls, WI, St. Croix River at...... 227-229 Partial-record station, definition of...... 10 St. Croix River at Afton...... 237-242 Particle size, definition of...... 10 at Prescott, WI...... 306 Particle-size classification, definition of... 10 at St. Croix Falls, WI...... 227-229 Paynesville, North Pork Crow River at...... 296 St. Croix River basin, gaging-station North Fork Crow River tributary near...... 296 records in...... 222-242 Percent composition, definition of...... 10 high-flow partial-record stations in...... 300 Periphyton, definition of...... 11 miscellaneous sites in...... 306 Pesticides, definition of...... 11 St. Francis River above Zimraerman...... 64 Pesticide program, definition of...... 15 St. Francis, Rum River near...... 69,327 Phytoplankton, definition of...... 11 St. Martin, Sauk River tributary No. 2 near... 295 Picocurie, definition of...... 11 St. Michael, School Lake Creek Pierz, Hillman Creek near...... 295 tributary near...... 296 Pillager, Crow Wing River near...... 56,326 st. Paul, Minnesota River at Fort Snelling Sevenmile Creek near...... 295 State Park at...... 182-188 Pine City, Snake River near...... 225,300 Mississippi River at...... 189- 191,331 Pine Creek near Arendahl...... 302 Mississippi River at Ford Plant at...... 89 -95,305 Pine River at Cross Lake Dam, at Cross Lake.., 52 Mississippi River at Industrial Molasses Pine River Reservoir at Cross Lake...... 51 at...... 192-198 Plankton, definition of...... 11 Sanborn, Cottonwood tributary No. 2 near...... 299 Platte River above Royalton...... 295 Sand Creek near New Prague...... 300 Platte River basin, high-flow partial- tributary No. 2 near Jordan...... 300 record stations in...... 295 Sandstone, Kettle River below...... 222,331 Pokegama Lake near Grand Rapids...... 43 Wolf Creek tributary near...... 300 Polychlorinated biphenyls, definition of...... 11 Sandy Lake at Libby...... 47 Pomme de Terre River at Appleton...... 117,328 Sandy River at Sandy Lake Dam, at Libby...... 48 Porter, Dillon-Syltie Impoundment Inlet near., 125-128 Sauk River tributary at Spring Hill...... 295 Dillon-Syltie Impoundment Outlet near...... 137-140 tributary No. 2 near St. Martin...... 295 Dillon Syltie Impoundment Pool near...... 129-136 Sauk River basin, high-flow partial-record Potsdam, Long Creek near...... 302 stations in...... 295 Prairie Ravine near Marshall...... 298 School Lake Creek tributary near St. Michael.. 296 Prairie River near Taconite...... 45,325 Sediment, definition of...... 12 Pratt, Turtle Creek tributary No. 2 near...... 301 Sevenmile Creek near Pillager...... 295 Prescott, WI, Mississippi River at...... 243,331 Shanahan Pond at Eagan...... 312 St. Croix River at...... 306 Shakopee, Lake Riley Inlet near...... 165 Primary productivity, definition of...... 11 Silver Creek at Rochester...... 301 Prior Lake, Spring Lake Inlet after Slater's Acres Pond at Eagan...... 311 pond"near...... 168-169 Slayton, Beaver Creek tributary above...... 302 Spring Lake Inlet before pond near...... 166-167 Beaver Creek tributary No. 2 near...... 302 Spring Lake Outlet near...... 170-171 Sleepy Eye, Spring Creek near...... 298 Publications on techniques of water-resources Spring Creek tributary near...... 298 investigations...... 24 Smith Creek near Hill City...... 294 Snake River near Pine City...... 225,300 Radiochetnical program, definition of...... 15 Solute, definition of...... 12 Rapidan, Blue Earth River near...... 148,330 South Branch Root River at Lanestaoro...... 302 Le Sueur River near...... 149,330 South Branch Yellow Medicine River Maple River near...... 300 at Minneota...... 298 Raven Stream, East Branch near New Prague... 300 South Pork Bear Creek near Grand Meadow...... 302 Records of discharge collected by agencies South Pork Crow River near Mayer...... 296 other than the Geological Survey...... 17 South Pork Root River near Houston...... 286,333 Recoverable from bottom material, South Pork Watonwan River near Ormsby...... 299 definition of...... 11 South Fork Whitewater River near Altura...... 302 Red rfing, Mississippi River at lock and South Fork Zumbro River at Rochester...... 260- 262,332 dam 3 near...... 244-250 on Belt Line at Rochester...... 301 Redwood Palls, Redwood River near...... 143,329 South Troy, Zumbro River tributary near...... 301 Redwood River near Marshall...... 142,329 Spafford, Little Sioux River near...... 304 near Redwood Palls...... 143,329 Special networks and programs...... 14 Reservoirs (see lakes and reservoirs) Specific conductance, definition of...... 12 Rice Lake tributary near Montgomery...... 300 Specific conductance and temperature at Robinson Brook near Onaraia...... 297 streamflow statiohs...... 325-333 Rochester, Bear Creek on Belt Line at...... 301 Spicer, Middle Fork Crow River near...... 66,326 Cascade Creek at...... 301 Spring Creek near Montevideo...... 298 Silver Creek at...... 301 near Sleepy Eye...... 298 South Pork Zumbro River at...... 260- 262,332 tributary near Sleepy Eye...... 298 South Pork Zumbro River on Belt Line at..... 301 near Wanamingo...... 302 Rock River at Luverne...... 304 Spring Lake Inlet after pond near Prior Lake.. 168-169 Rockford, Crow River at...... 67,326 before pond near Prior Lake...... 166-167 Rollingstone, Straight Valley Creek near...... 277,333 Spring Lake Outlet near Prior Lake...... 170-171 Root River near Houston...... 285,333 Square Lake Outlet near Stillwater...... 230-231 near Lanesboro...... 284,333 Springfield, Cottonwood River near...... 299 North Branch, tributary near Stewartville... 302 Springhill, Sauk River tributary at...... 295 South Branch, at Lanesboro...... 302 Stage-discharge relation, definition of...... 12 South Pork, near Houston...... 286,333 Stanchfield Creek tributary near Day...... 297 Root River basin, gaging-station records in... 284-286 Starbuck, Little Chipptewa River near...... 297 high-flow partial-record stations in...... 302-303 Outlet Creek tributary near...... 298 Rose Creek tributary near Dexter...... 303 Steele Center, Turtle Creek tributary near.... 301 Royalton, Mississippi River near...... 57-63,326 Stewartville, North Branch Root River Platte River above...... 295 tributary near...... 302 Rum River near St. Francis...... 69,327 Stillwater, Square Lake,Outlet near...... 230-231 tributary near Onamia...... 297 Stockton, Garvin Brook at...... 270,332 Rum River basin, gaging-station records in.... 68-69 Stockton Valley Creek, at...... 271 273,332 high-flow partial-record stations in...... 297 Stockton Valley Creek kt Stockton...... 271 273,332 miscellaneous sites in...... 305 Stony Brook tributary hear Poley...... 296 Runoff in inches, definition of...... 11 Straight River near Faribault...... 259,331 449 INDEX Page Page Straight Valley Creek near Rollingstone...... 277,333 Water-quality records (Continued) Streamflow, definition of...... 12 water analysis...... 18 Substrate, definition of...... 12 water temperature...... 18 Sunrise River near Lindstrom...... 226,331 Watonwan River, near Delft...... 299 Surface area, definition of...... 12 near Garden City...... 147,330 Surface-water data, accuracy of...... 17 South Pork near Ormsby...... 299 collection and computation of...... 15 Watson, Chippewa River below diversion near... 305 Surface-water data, other available...... 17 Chippewa River diversion near...... 305 Surficial bed material, definition of...... 12 Webber Impoundment Inlet near Gary, SD...... 317 Suspended, definition of...... 12 Webber Impoundment near Gary, SD...... 318-321 Suspended recoverable, definition of...... 12 Weighted average, definition of...... 13 Suspended sediment, definition of...... 12 Welch, Cannon River at...... 301 Suspended-sediment concentration, West Branch Lac qui Parle River near definition of...... 12 Gary, SD...... 297 Suspended-sediment discharge, definition of... 12 Wet mass, definition of...... 9 Suspended-sediment load, definition of...... 12 Whalan, Gribben Creek near...... 302 Suspended total, definition of...... 13 Whetstone River near Big Stone City, SD...... 96-98,327 Swan River near Calumet...... 46,325 Whitewater River near Beaver...... 269,332 tributary at Warba...... 294 North Pork, near Elba...... 264-268,332 South Pork, near Altura...... 302 Taconite, Prairie River near. 45,325 Whitewater River basin, gaging station Taxonomy, definition of. 13 records in...... 264-269 Time-weighted average, definition of...... 13 high-flow partial-record stations in...... 302 Thomas Lake at Eagan...... 308 Wilderness Lake at Sagan...... 311 Tons per acre-foot, definition of...... 13 Williams Lake near Akeley...... 31-40 Tons per day, definition of...... - 13 Willow River below Palisade...... 294 Total, definition of...... 13 Wilmont, Kanaranzi Creek tributary No. 2 near. 304 Total bottom material, definition of...... 13 Wilno, North Branch Yellow Medicine River Total coliform bacteria, definition of.... 3 tributary near...... 298 Total load, definition of...... 13 Windom, Warren Lake tributary near...... 303 Total organism count, definition of...... 10 Winnibigoshish Lake near Deer River...... 29 Total recoverable, definition of...... 13 Winona, Mississippi River at...... 278-283,333 Total sediment discharge, definition of... 12 Wolf Creek tributary near Sandstone...... 300 Tritium network, definition of...... 15 WDR, definition of...... 13 Trout Brook tributary near Goodhue...... 302 WRD, definition of...... 13 Turtle Creek tributary near Steele Center, 301 WSP, definition of...... 14 tributary No. 2 near Pratt...... 301 Yellow Bank River near Odessa...... 112-116,328 Vermillion River near Empire...... 251-258,331 Yellow Hedicine River near Granite Palls...... 141,329 Vermillion River basin, gaging-station North Branch, near Ivanhoe...... 298 records in...... 251-258 tributary near Wilno...... 298 South Branch, at Minneota...... 298 Walters, East Branch Blue Earth River near.... 299 Wanamingo", Spring Creek near...... 302 Zimmerman, St. Francis River above...... 64 Warba, Swan River tributary at...... 294 Zooplankton, definition of...... 11 Warren Lake tributary near Windom...... 303 Zumbro River at Kellogg...... 263,332 Water-quality records, analyses of samples South Pork, on Belt Line at Rochester...... 301 collected at ground-water wells...... 437-443 South Pork, at Rochester...... 260-262,332 at partial-record stations...... 307-324 tributary near South Troy...... 301 miscellaneous analyses at streamflow Zumbro River basin, gaging-station records stations...... 325-333 in...... 260-263 sediment...... 18 high-flow partial-record stations in...... 301-302 October 1,1978 FACTORS FOR CONVERTING INCH-POUND UNITS TO INTERNATIONAL SYSTEM UNITS (SI)

The following factors may be used to convert the inch-pound units published herein to the International System of Units (SI). This report contains both the inch-pound and SI unit equivalents in the station manuscript descriptions. Multiply inch-pound units By To obtain SI units Length inches (in) 2.54xlO! millimeters (mm) 2.54xl(T2 meters (m) feet (ft) 3.048XKT1 meters (m) miles (mi) 1.609x10° kilometers (km) Area acres 4.047xl03 square meters (m2 ) 4.047XKT1 square hectometers (hm2 ) 4.047xl(T3 square kilometers (km2 ) square miles (mi2 ) 2.590x10° square kilometers (km2 ) Volume gallons (gal) 3.785x10° liters (L) 3.785x10° cubic decimeters (dm3 ) 3.785X10"3 cubic meters (m3 ) million gallons 3.785xl03 cubic meters (m3 ) 3.785xl(T3 cubic hectometers (hm3 ) cubic feet (ft3 ) 2.832x10* cubic decimeters (dm3 ) 2.832xl(T2 cubic meters (m3 ) cfs-days 2.447xl03 cubic meters (m3 ) 2.447xl(T3 cubic hectometers (hm3 ) acre-feet (acre-ft) 1.233x103 cubic meters (m3 ) 1.233X10"3 cubic hectometers (hm3 ) 1.233xl(T6 cubic kilometers (km3 ) Flow cubic feet per second (ft3 /s) 2.832x10* liters per second (L/s) 2.832x10* cubic decimeters per second (dm3 /s) 2.832xl(T2 cubic meters per second (m3 /s) gallons per minute (gal/min) 6.309xl(T2 liters per second (L/s) 6.309xl(T2 cubic decimeters per second (dm3 /s) 6.309x1 (T5 cubic meters per second (m3 /s) million gallons per day 4.381X101 cubic decimeters per second (dm3 /s) 4.381xl(T2 cubic meters per second (m3 /s) Mass tons (short) 9.072XKT1 megagrams (Mg) or metric tons POSTAGE AND FEES PAID U.S. DEPARTMENT OF THE INTERIOR INT 413

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