I

MISSOURI RIVER DIVISION OMAHA DISTRICT SUMMARY OF 1980-81 REGULATION ACTIVITIES DIVISION OMAHA DISTRICT SUMMARY OF 1980-1981 RESERVOIR REGULATION ACTIVITIES

SECTION PAGE

I. PURPOSE AND SCOPE 1

II. IN THE OMAHA DISTRICT 1

III. WATER SUPPLY 2

IV. RESERVOIR ACCOMPLISHMENTS 2

V. RESERVOIR OPERATIONS 5

VI. REGULATION PROBLEMS 9

VII. RESERVOIR REGULATION MANUALS 10

VIII. DATA COLLECTION PROGRAM AND PROCEDURES 10

IX. RESEARCH AND STUDIES 12

X. TRAINING AND METHODS 13

XI. PERSONNEL AND FUNDING 13 INCLOSURES

1. Map of Flood Control

2. Project Data Sheets

3. Total Number of Flood Control Reservoirs in Omaha District

4. Water Supply Map

5. Regulation Sheets for Past Year

6. Manual Schedule

7. Organization Chart, Omaha District

8. Organization Chart, Reservoir Regulation and Reservoir, , , June 10, 1981 Average Discharge ;;; l4p 715 ds, Bureau of Rec!arnat!on Photo MISSOURI RIVER DIVISION OMAHA DISTRICT SUMMARY OF 1980-81 RESERVOIR REGULATION ACTIVITIES

I. PURPOSE AND SCOPE. This annual report has been prepared in accord­ ance with paragraph 12-C of ER 1110-2-1400 to summarize significant tributary reservoir regulation activities of the Omaha District. The period covered is August 1980 through July 1981.

II. RESERVOIRS IN THE OMAHA DISTRICT.

a. Reservoirs with Flood Control Storage. There are 33 tributary reservoirs with allocated flood control storage covered in this report. The darns are listed below. Included are 22 Corps of Engineers darns and 11 Bureau of Reclamation darns. The reservoir locations are shown on Inclosure 1 and pertinent data are presented in Inclosure 2. Inclosure 3 tabulates the numerical buildup of Corps reservoirs in the Omaha District. Pictured on the preceding page is the Bureau of Reclamation's Buffalo Bill Darn and Reservoir in Montana. Although this reservoir has no storage allocated to flood control, it prevented considerable flooding during June when it stored a flood estimated to be at least a 100-year event.

CORPS OF ENGINEERS BUREAU OF RECLAMATION 1. Bear Creek Darn 23. Boysen Darn 2. Bowman-Haley Darn 24. Canyon Ferry Darn 3. Bull Hook Darn 25. Clark Canyon Darn 4. Cedar Canyon Darn 26. Glendo Darn 5. Chatfield Darn 27. Heart Butte Darn 6. Cherry Creek Darn 28. Jamestown Darn 7. Coldbrook Darn 29. Keyhole Darn 8. Cottonwood Springs 30. Pactola Darn 9. Kelly Road Darn 31. Shadehill Darn 10. Papillion No. 16 32. Tiber Darn 1/ lL Papillion No. 11 33. Yellowtail Darn 12. Pipestem Darn 13. Salt No. 2 14. Salt No. 4 15. Salt No. 8 16. Salt No. 9 17. Salt No. 10 18. Salt No. 12 19. Salt No. 13 20. Salt No. 14 2L Salt No. 17 22. Salt No. 18

!/ Storage allocated for flood control regulation by the Corps was temporarily suspended in 1966 due to limitations placed on the spillway. In the spring of 1982 rehabilitation of the spillway is expected to be complete.

1 b. Reservoirs without Flood Control Storage. There are two Corps of Engineers tributary lakes without allocated flood control storage included in this report. They are both subimpoundments of the Missouri River Main Stem Projects and were formed by the construction of relocations for transportation facilities and utilities. Lake Audubon, a subimpoundment of , is located just northeast of Riverdale, North Dakota. The lake is a key feature of the Bureau of Reclamation's Garrison Diversion Unit Project. Lake Pocasse, a subimpoundment of , is located near Pollock, South Dakota. The Bureau of Reclamation planned to use the lake as a regulating reservoir for the proposed Pollock-Herreid Irrigation Unito At this time, construction on these diversion units has been halted pending solution of environmental and economic factors. Both lakes are used for fish and wildlife and recreational purposes. Their locations are shown on Inclosure 1 and pertinent data are presented in Inclosure 2.

III. WATER SUPPLY. Water supply in the Omaha District during the reporting period was generally below average, prolonging the pattern of drought set in 1979. Little or no winter snowpack accumulated in the plains area. The mountain snowpack was about 50 to 60 percent on 1 May. Soon after mid-May, a combination of heavy rainfall and early mountain snowmelt caused record floods in areas around Deer Lodge, Helena and Bozeman, Montana. In early June, heavy rains augmented by snowmelt runoff caused flooding in north­ western Wyoming. Peak discharges of several streams in this area exceeded thelOO-year incidence. In southeastern Wyoming and the eastern slopes of , snowpacks recorded near record low water equivalents on 1 May. Runoff into the was near 70% of normal above . Drought conditions generally prevailed during much of the period in Colorado and in parts of North and South Dakota, Montana and Nebraska. In extreme western Nebraska, flooding occurred along Lodgepole Creek as a result of runoff from a 9-inch rainfall on 1 July. The peak discharge at the gaging station at Bushnell was approximately equal to that of a 100-year event at that site. Despite above normal rainfall at many reporting sta­ tions during July, total runoff for the April-July period was much below normal and for many points in the Missouri River Basin, the runoff was the lowest of record. Inclosure 4 gives the percent of normal runoff at pertinent locations in the Omaha District. Atabulation of pertinent peak high water discharges given below indicates the magnitude of some of this year's maximum flows. See page 4.

IV. RESERVOIR ACCOMPLISHMENTS.

a. Corps of Engineers Dams. Flood damages prevented by the Corps dams in 1981 and accumulative totals are estimated as follows: FLOOD DAMAGES PREVENTED IN DOLLARS BY CORPS DAMS Dam 1981 Accumulative Total Bull Hook (Havre Project) 0 $ 20,663,500 Spring Creek (Lake Pocasse) 0 33,000 Bowman-Haley 0 1,838,000 Cottonwood Springs 0 0 Cold Brook 0 0

2

--~. Dam 1981 Accumulative Total

Cedar Canyon (Red Dale Gulch) 0 250,000 Pipestem 0 5,982,000 Papillion Creek #16, 11 0 0 Chatfield 0 640,000 Bear Creek 0 0 Cherry Creek 0 157,000,000 Kelly Road (Aurora) 0 391,000 Salt Creek Project 0 10,464,700 Total 0 $197,262,200

Low flow augmentation releases were continued from Bowman-Haley Dam until 29 August for livestock and fish usage. Lake Audubon and all the above projects, except the normally dry reservoirs of Bull Hook, Cedar Canyon and Kelly Road were used for recreation. Visitation days at the projects for CY 1980 and for 1981 to 1 September, along with available accumulative totals, are tabulated below.

RECREATION VISITATION IN DAYS Accumulative Initial Project 1980 1981 1./ to 1 SeE '81 Year Bowman-Haley 30,970 28,000 747,340 1967 Cottonwood Springs 14,870 9,900 ll5,430 1974 Cold Brook 29,820 38,400 898,400 1955 Pipestem 153,800 88,900 670,880 1974 Papillion Cr. #ll 177,810 298,800 1,006,100 1977 Papillion Cr. 1116 132,720 286,700 1,203,000 1977 Chatfield 828,960 993,800 3,561,470 1976 Cherry Creek 1,243,150 1,481,400 20,531,090 1959 Salt Creek #2 34,200 27,900 " #4 208,200 160,300 " #8 49,800 143,500 " 119 23,800 124,500 " 1110 14,100 ll,900 II #12 178,200 121,000 " #13 10,000 14,300 " " #14 750,200 705,400 1117 261,300 181,300 " " ·-·--· II II #18 780,700 780,600 Salt Cr. Total 2,310,500 2,270,700 28,813,930 1964 1./ As of 1 September 1981 b. Bureau of Reclamation Dams. Flood damages prevented (both local and to the Missouri River Main Stem) by the Bureau dams in 1931 and accumula­ tive totals are estimated as follows: 1981 1981 Accumulative Dam Local Main Stem Total Total Clark Canyon $ 13,000 $ 0 $ 13,000 $ 3,842,000 Canyon Ferry 5,000,000 7,200,000 12,200,000 48,646,000 Tiber 0 1,421,000 1,421,000 31,549,000 Boysen 0 1,006,000 1,006,000 20,025,000

3 PERTINENT 1981 WY PROVISIONAL PEAK DISCHARGES (C.F.S.) Maximum Flood Drainage Maximum 1981 Previously Known Record Recurrence Station Area Stage Discharge Date Stage DischarBe Date Began Interval (sq.mi.) (years)

Gallatin River at Logan 1,795 8.45 7,570 23 May *6.25 9,840 12 Jun 1899 **1898 9 Missouri River at Toston 14,669 11.34 29,400 24 May ll.77 32,000 6 Jun 1948 1929 14 ... Missouri River near Ulm 20,941 14.99 28,500 24 May 17.est 35,000 Jun 1953 1957 9 Sun River near Vaughn 1,854 15.45 13,600 24 May 23.40 53,500 9 Jun 1964 1934 Missouri Riv at Morony'Dam 9.02 45,400 24 May 72 '000 1964 Smith River near Ft. Logan 846 4,350 23 May 5.46 1,930 22 Mar 1978 1977 8 Smith River near Eden ll ,800 24 May >100

Yellowstone Riv at Corwin Sprg 2,623 8.55 20,200 9 Jun 11.50 32,000 14, 15 Jun 1918 **1889 Stillwater Riv near Absarokee 975 5.47 6,520 8 Jun 7.17 12,000 15 Jun 1967 **1910 Rock Creek nr Red Lodge 124 4.13 1,490 9 Jun 4.78 3,110 4 Jun 1957 ')'(*1932 Clark's Fork near Silesia*** 2,093 9.40 ll ,000* 10 Jun *7.51 ll ,800 10 Jun 1972 ***1969 N. Fork Shoshone Riv nr Wapiti 775 12.00 21,000 9 Jun *6.88 9,250 23 Jun 1925 >100 S. Fork Shoshone Riv nr Valley 297 9.50 11,000 9 Jun 8.83 8,220 15 Jun 1963 **1956 >100 S. Fork Shoshone Riv above Buffalo Bill Reservoir 585 9.80 13,500 9 Jun 5.92 8,120 3 Jly 1975 **1903 >100 Shoshone Riv below Buffalo Bill Reservoir 1,538 11.57 16,600 9 Jun 18,700 15 Jun 1918 1921 50 Shoshone River near Lovell 2,350 7.94 15,200 10 Jun 7.49 13,400 1 Jly 1967 1966 so Gallatin Riv nr Gallatin Gateway 825 5.56 5,920 9 Jun 7.38 9,690 17 Jun 1974 **1889

Missouri River at Sioux City 314,600 20.96 40,000 14 Jun 24.28 441,000 14 Apr 1952 1897 Missouri River at Omaha 322,800 9.68 47,800 16 Jun 30.20 396,000 18 Apr 1952 **1872 Missouri River at Neb City 410,000 13.58 63;5oo 7 Aug 27.66 414,000 19 Apr 1952 1929 Missouri River at Rulo 414,900 14.43 63,200 7 Aug 25.60 358,000 22 Apr 1952 **1886

*Site and datum then in use. **Record not continuous. ***Published as "at Edgar" to 9/1969. 1981 1981 Accumulative Dam Local Main Stem Total Total Yellowtail $ 105,000 $ 3,514,000 $ 3,619,000 $ 21,096,000 Heart Butte 0 0 0 11,412,700 Shadehill 0 0 0 7,868,900 Pactola 0 0 0 672,700 Keyhole 0 0 0 516,000 Jamestown 0 0 0 10,691,000 Glendo 0 lb~500 102500 9,669,500 $5,118,000 $13,151,500 $18,269,500 $165,988,800

All of the projects were used for irrigation, conservation and recreational purposes. Hydroelectric power is generated at Boysen, Canyon Ferry, Glendo and Yellowtail.

V. RESERVOIR OPERATIONS.

a. Operations the Past Year. Individual project operation summaries are contained in Inclosure 5. Significant reservoir operations during the period are summarized below. Significant events at and Buffalo Bill Dam are also discussed.

1. Corps of Engineers. Although snowfall was deficient and seasonal rainfall was below normal throughout much of the Missouri River Basin, runoff in the James River Basin was adequate to sustain a live flow in Pipestem Creek through Pipestem Reservoir for almost the entire period. In July, these low flows were supplemented by a short-term release from the Bureau's Jamestown Reservoir to ward off stagnation in the river. At Bowman-Haley Reservoir, the conservation pool failed to fill for the second time since its initial fill. A controlled release was made at the request of downstream water users from 1-29 August 1980 for the enhancement of flows for wildlife and livestock. In July 1981, a request from downstream water users for re­ leases from the conservation pool was denied, as locally heavy rain showers following mid-July restored the streamflow in a number of the tributary streams in this general region. At the Salt Creek Dams, lining of the out­ let conduits with concrete was completed in October 1980. This work was initiated in August of 1978 and included all of the Salt Creek projects except Dam No. 18 which was constructed with a concrete outlet conduit. At Chatfield Reservoir, a small encroachment in the flood pool was permitted in April to benefit local interests. On 8 July, a gradual drawdown of the pool to reach 5426.94 ft. m.s.l. (20,000 A.F. of storage) was initiated by the City of to make room for water storage when upstream city diver­ sions are shut off and to eliminate ice problems at the intake during winter months.

2. Bureau of Reclamation. Of the ten Bureau projects with storage space allocated to flood control, only Clark Canyon and Canyon Ferry Reser­ voirs stored a significant amount of water in the flood storage zones. At Yellowtail Reservoir, only a small amount of the flood storage zone was utilized. Record inflows were stored in Canyon Ferry Reservoir. Tributaries downstream reached overbank stages causing some minor flooding of the Missouri River in the Great Falls, Montana area despite the control provided by . See pictures on pages 7 and 3 • At Boysen Reservoir, although the conservation pool did not fill during this period, damaging inflows were

5 stored during June. At Tiber Reservoir, a peak daily average inflow of 8,895 c.f.s. was recorded on 24 May. In the Shoshone River Basin, although the snowpack was much below average, heavy rains in early June caused a rapid rise in the pool level of Buffalo Bill Reservoir. Inflow was estimated to be in excess of a 100-year event. The maximum pool elevation reached was 6.6 ft. above the spillway crest on 9 June. The maximum daily average inflow was 22,164 c.f.s. on 9 June. The outflow on that date was 14,697 c.f.s. Water was stored above the spillway crest from 31 May to 18 July. At Glendo Reservoir, rainfall from early to mid-May, delayed irrigation re­ leases in the North Platte drainage. In the interest of conservation, the flood storage zone was utilized briefly to supplement storage in other reservoirs in the North Platte system.

b. Operating Plans for August 1981 through July 1982.

1. Corps of Engineers. With the exception of Bear Creek, Cherry Creek, Chatfield and Pipestem Dams, all Corps of Engineers tributary dams have ungated outlets and no special plans are required. Evacuation of stored flood water in these projects is scheduled as soon as practicable after each flood event. Flood releases from are coordinated with those from the Bureau's . At Salt Creek Dam No. 18, releases of inflow to satisfy downstream water rights for irrigation were made from 22 June through 31 July 1981. Next summer, releases for water rights, upon request, are again expected to equal the inflow up to 3 c.f.s. At Chatfield the pool level is expected to remain between elevations 5423 and 5432 feet m.s.l. at all times except during prolonged yearly periods of drought when it may fall below elevation 5423 and during flood periods when it may rise above elevation 5432. Each year, from 1 May to 31 August, the pool level is expected to be maintained at least to elevation 5426.94 (20,000 A.F.) for recreational purposes. Storage of water above elevation 5426.94 to elevation 5432 will depend on the availability of free water and/or excessive runoff and/or the desire of the City of Denver to store water.

2. Bureau of Reclamation. As in the past, the Bureau will continue to operate their reservoirs to meet flood control commitments and to coordinate operations with other interests to achieve optimum use of the water resource. Generally, all reservoirs will be operated as near to the top of their con­ servation pools as possible. Pertinent special operating plans are described as follows: Boysen, Canyon Ferry, Clark Canyon, and Yellowtail Reservoirs require evacuation and refill of joint use storage for flood control based on mountain runoff inflow forecasts. Canyon Ferry Reservoir will be regulated (1) to be no higher than elevation 3794 by 30 November to reduce chances of headwater ice problems and (2) as conditions permit to be no lower than elevation 3781 prior to the spring runoff period in an effort to maintain a more efficient powerplant output. Tiber Dam has had maximum pool level restrictions imposed by the unusable spillway. The spillway reconstruction and other modifications to be completed in October 1981 will allow full utiliza­ tion of the reservoir in 1982. Refill of the conservation pool will be accomp­ lished over a two to three year period to encourage fish spawning. Yellowtail Reservoir will be regulated (1) to be no higher than elevation 3630 by 30 November to reduce chances of headwater ice problems and (2) to be no higher than elevation 3600 before the beginning of the spring runoff. The special ____ ... -···

..-·· -.« ·-· -~ .. ~...... ·-.--:-....~,:."~ .·.: . .-:. s~~~~·-"'·i«- -·· .·.;... ·· ... ..

.--:.:<:" -:-······ ••. i'::.-: ..·=- first Avenue antl River Drive, Downstream nf the confluence or H-w Sun H!ver and ?Aissnuri River. Great Fails, rv,ontana 2 June 1981

Highwater$ Mlssourl River~ near qa9e at Ulm 6E~ Ntontana. G. H. "" 14. 4 feet fv\Sl, Discharge " 26$ 500 cfs.

{flood Staqe .:Z 13. B feet fv1SLl 2 June 1981 Black Ei:HJle Falls, near Great Fads; fv1ontana. fv\lssourl H!ver Discharge " 34~ 000 cfs., 2 June 1981

Black Ea~1!e Falls? near Great Falls~ Montana. NUssouri River Di scharqe ~ s:t 400 cfs. 2 September 1981 <> operation to measure seepage between and the downstream afterbay is again scheduled during October. The current seepage flow estimate is 75 c.f.s. Jamestown Dam started the evacuation of the joint use storage zone on 9 September 1980. The evacuation was prolonged to ex­ tend live streamflow below the dam. The same procedure will be followed in September of this year. In order to conserve as much water as practicable following drought conditions in 1981, releases at this winter will be lower than normal, probably about 10 c.f.s.; at , they will be reduced from 15 to 10 c.f.s. ; and at , releases will be reduced from 10 to 5 c.f.s. Replacement storage up to a combined total of 506,000 acre-feet can be made available in Clark Canyon and Canyon Ferry Reservoirs on a forecast basis. In addition to the reservoirs covered in this report, other Bureau reservoirs, without allocated flood control storage space, will provide flood control in their normal operation of storing seasonal runoff. Some of these projects are Gibson and Fresno Dams in Montana and Bull Lake and Buffalo Bill Dam in Wyoming.

VI. REGULATION PROBLEMS.

a. Downstream Channel Capacity. Inadequate channel capacity is a problem below most of the tributary reservoirs. Encroachment by natural plant growth due to low flows, by flood deposits left in place, and by human construction and agriculture are common. In some cases, project design ignored the existing channel capacity. A brief study outlining the operat­ ing constraints was completed in 1974. The low flow channel capacity of the South Platte River below Chatfield Dam has prevented releases in accord­ ance with the three reservoir system (Chatfield, Bear Creek and Cherry Creek) plan of regulation during the evacuation of the flood storage zones at these projects. Added to this situation is the fact that the reservoir design rout­ ings for Chatfield, Cherry Creek and Bear Creek Reservoirs were made indepen­ dent of each other and that these individual routings neglected (1) the effect of the releases from the other two dams in the three reservoir system, (2) the effect of the incremental runoff below the dams and (3) the actual channel capacity below the three dams.

b. Releases for Purposes Other Than Authorized Project Functions. Inquiries and requests have been received from states, cities, and other organizations for the release of water from certain projects for other than authorized purposes such as irrigation, water supply, and improvement of water quality. These requests pertained to supplemental discharges from the conservation pool or the retention of water and slow down of releases from the flood storage zone. During the drought conditions in the semi-arid region of northwest South Dakota, irrigators below Bowman-Haley Dam have frequently requested that a release of water be made for their use. A small release was initiated on 11 July 1980 in an attempt to maintain a live stream­ flow for livestock and fish. A request this year was denied when heavy rains in the area replenished the flow in streams in that area of North and South Dakota.

c. Water Rights. The ever-increasing population and prolonged dry periods in the semi-arid and dry subhumid regions have prompted considerable interest in streamflow water rights. The demand for water may affect reservoir levels more in the future than in the past and as a result, the authorized project recreation function may also be affectedo

9 d. Reservoir Area Facilities. Existing recreational and other facilities in the lake areas impose operating constraints even though a right to inundate is inherent in most cases. This year recreational areas were inundated by the high pool level at Clark Canyon. Facilities flooded included latrines and shelters.

e. Easements in Reservoir Areas. The study of inquiries relating to new and existing easements within reservoir areas continues to require considerable time-consuming effort.

f. Potential Hazardous Conditions. A potential problem exists if water is released over the project spillways where the land below the spill­ ways has not been acquired and urban areas now exist. A hazard-to-life condition exists if a significant flow of water is discharged over the spillways at and Kelly Road Dam in Denver, Colorado, and Salt Creek Dam No. 17 in Lincoln, Nebraska. ( g. Data Collection. The Omaha District covers a large area; therefore, only a sparse collection of hydrologic data is possible. As a result, some hydrologic events are undetected or not adequately observed.

VII. RESERVOIR REGULATION MANUALS. The Reservoir Regulation Section continues to spend as much time as possible on manual writing. However, first priority must be assigned to actual daily reservoir regulation activities and reports to higher authority. During the period covered by this report, no manuals were submitted for approval. The Pipestem Manual, which was submitted to MRD for approval on 18 July 1980 was re­ turned informally to the District for revision in November 1980. See inclo­ sure 6 for future estimated manual submittal times.

VIII. DATA COLLECTION PROGRAM AND PROCEDURES.

a. Collection of Water Control Data. Water control data such as Reservoir, River and Weather information are collected in the Omaha District Reservoir Regulation Section from the following sources: observers, project offices, the National Weather Service, the Geological Survey and the Bureau of Reclamation. Several different methods of communication are used to collect the data. Telephone communication is used to collect data that comes directly to the Reservoir Regulation Section from observers and field personnel. Two National Weather Service teletype networks, Circuit C and RAWARC, and a weather map Facsimile Recorder furnish both weather and river information from the National Weather Service. In addition to the above facilities, the Reservoir Regulation Section, by use of computer terminals, has access to the National Weather Service computer located in Medford, Oregon. This computer automatically interrogates the National Weather Service's stream gaging sensors for Digital Automatic Remote Data Collection (DARDC). Computer terminals are also used to furnish access to the Corps' Missouri River Automated Data System (MRADS). Water control data obtained from the above discussed sources are entered into the MRADS data base. The six Missouri River main stem projects are now equipped with computer terminals and have access to the MRADS data base which allows them to enter and receive information directly from the data base. This eliminated the need for the Missouri River Main Stem Projects Closed Cir­ cuit Teletype Network which has been discontinued. All exchange of

10 information and data is now conducted through MRADS. Programs in the MRADS connect gage height to discharge, if desired, and provide upstream and downstream routing capability that is used as an aid in determining reservoir releases. Pool elevations can also be connected to storages. Once entered in the MRADS data base, data are available to users Division­ wide for data listings, reports, bulletins, and charts. The MRADS data base provides a systemized method of processing, recording, and distribut­ ing data for all users. b. Automated Remote Sensors. The Omaha District now has 75 telemark sensors that can be interrogated from any telephone. These have been in­ stalled by the Corps or the National Weather Service at Geological Survey stream gages and flood control dam headwater gates. There are 19 National Weather Service DARDC sensors which must be interrogated either by computer terminal or by a special digital reading device used in conjunction with the telephone. There are 14 U.S.G.S. stations in Montana that are equipped with GOES Data Collection Platforms. The GOES Data Collection Platform (DCP) is part of the GOES Data Collection System. This is a satellite-based system for the collection of a large variety of environmental data. The system is a data relay network consisting of individual data gathering devices (referred to as platforms) which can transmit their data to one of two Geostationary Operational Environmental Satellites (GOES). The data is relayed through either GOES satellite to one Common Command and Data Acquisition (CDA) ground station located in Wallops Station, Virginia. The data is then relayed via leased conditional telephone lines to Camp Springs, Maryland, where it is checked and disseminated to the appropriate data recipients. The National Weather Service receives this data and transmits it on its RAWARC teletype networko The Omaha District is now in the process of installing a network of GOES Data Collection Platforms at 36 gaging stations located throughout the Districto Data Collection Platforms are being installed at 19 U.S.G.S. gaging stations and 17 Corps of Engineeers gaging stations. The U.S.G.S. gaging stations include 4 stations in Montana, 4 stations in South Dakota, 6 stations in Iowa and 5 stations in Nebraska. The Corps of Engineers sta­ tions include 13 stations in Nebraska, 2 stations in North Dakota, 1 station in South Dakota and 1 station in Colorado. The data from these stations will be relayed through the West GOES Satellite to a Data Acquisition ground station located at the Bureau of Reclamation Office in Bois~ Idaho where it will be processed and entered directly into our MRADS data base. c. Cooperative Hydrologic Programs. The Omaha District has two annual programs which provide project funds for stream gaging and report activities. The Cooperative Stream Gaging Program provides support to seven Geological Survey Districts: Colorado, Iowa, Montana, Nebraska, North Dakota, South Dakota, and Wyoming. These funds help provide for current stage and dis­ charge data, together with publication,and also sediment, water quality, ground water records, snow course data and telemeter maintenance. The National Weather Service Cooperative Reporting Network (FC-50) provides financial support for the collection of data from 60 gaging stations at six River District offices. These are all stations that were formerly operated by the Corps and are required for reservoir regulation purposes. These sta­ tions are in addition to the regular INational Weather Service reporting stations. do Water Quality. The Omaha District water quality unit conducts periodic sampling analysis of physica~ chemical, and biological parameters on all small reservoir projects located in the Omaha District. Occasional

11 surveys and special investigations are also conducted, as necessary, to identify _or delineate specific problems. Projects sampled by in-house personnel include the Papillion Creek Reservoir and the Salt Creek Reservoirs. The sampling frequency on these reservoir is six times per year. Bowman-Haley, Chatfield, Cherry Creek, Cold Brook and Cottonwood Springs Reservoirs are sampled four to six times per year under the Corps/USGS Cooperative Program. Pipestem Reservoir is sampled weekly during the summer months under contract with Jamestown College. Sampling of inflows and out­ flows on all of the Omaha District projects can best be classified as vari­ able since many of the feeder streams are intermittent and many of these projects spill only at irregular intervals. Periodic sampling in Cottonwood Springs Reservoir has ceased, since this project currently impounds very little water. Sampling on Bear Creek Reservoir was initiated during 1980. eo Sedimento Except for sediment samples obtained by automatic samplers located near Omaha, Nebraska on the West Branch of the Papillion Creek and on the Big Papillion Creek, all sediment samples collected in the Omaha District are obtained by the Geological Survey under a cooperative stream gaging agree­ ment~ Complete sedimentation surveys of small reservoir projects are made at approximately 8-year intervals. These include aggradation surveys to update water volume storage and sediment accumulation values, and degradation surveys to monitor downstream channel changes. IX. RESEARCH AND STUDIES. During the report period, studies by the Reservoir Regulation Section and others have included: a. Necessary Real Time Studies. Numerous studies are made, as necessary, to assure authorized and/or optimum use of the reservoirs. These involve inflow estimates, release scheduling, study of downstream river conditions, observations and study of past and current weather conditions, and keeping aware of water rights ramifications. Review, study, and comment on various preliminary planning reports and permits is provided as necessary. h. Missouri River Division Water Control Data System Master Plan. The Master Plan was submitted to OCE by MRD for approval in July 1980. The plan was returned to MRD for revision in FY 81. The Reservoir Regulation Section has provided input for revising the plan. Jim Huston of the Section is the District representative on a committee that was formed in February 1981 with representatives from HEC, MRD and KCD to determine needs for the new data collection method and to assist in revising the Master Plan. c. Channel Reconnaissance. In the Grand River basin, North and South Dakota, reconnaissance trips to observe the adequacy of flow in the river between Bowman-Haley Dam and Shadehill Reservoir were initiated on a weekly basis on 27 June 1980 by personnel of the Area Engineer's office. The last trip in 1980 was completed on 16 September. On 2-3 June, Kevin Mayberry of the Reservoir Regulation Section made a reconnaissance trip to observe high water conditions and channel capacities on the Missouri River and its tribu­ taries from Toston through Great Falls, Montanao d. Supersaturation. No gas supersaturation studies were conducted on any of the reservoir projects this period due to the lack of significant releases. These measurements are made in accordance with ETL 1110-2-239, dated 15 September 1978.

12 e. FERC Applications. During the period of this report 60 applica­ tions for preliminary permits were made to the Federal Energy Regulatory Commission by various entities for studies in connection with new hydro­ power plants within the Omaha District. These applications were reviewed and comments were prepared by the District on the impact of these proposed plants on the responsibilities of the Corps of Engineers. Considerable study was involved in this process.

X. TRAINING AiiD METHODS. During the period of this report employees in the Section attended the courses listed below:

s: a. EEO Training for Supervisors (in-house) - 12 hours ... 7 I b. Introduction to Meteorology (U.N.O.) - 48 hours c. Publicly Supplied Potable Water (National Water Conservation Conf) - 16 hours d. Video Tape Instruction - Basic Concepts of Dam Breaks and Development of Dam Break Hydrographics - Computer Program (HEC) - 7 hours

llllf1 I I n: a. Flood Estimating and Routing Camp. Prog. (U.N.L.) - 24 hours b. Flood Flow Frequency Analysis (HEC) - 40 hours c. Basic Skills in Statistics (OPM) - 40 hours d. Video Tape Instruction - Basic Concepts of Dam Breaks and Development of Dam Break Hydrographics - Computer Program (HEC) - 7 hours • 5 , ng: a. Defensive Driving Course (Omaha Safety Council) - 8 hours b. EEO Training for Supervisors (in-house) - 10 hours c. Video Tape Instruction - Basic Concepts of Dam Breaks and Development of Dam Break Hydrographics - Computer Program (HEC) - 7 hours

I·J~n: a. Flood Estimating and Routing Camp. Prog (U.N.L.) - 24 hours b. Writing Effective Letters (OPM) - 24 hours

•rll?•'lll[.. ry = a. Video Tape Instruction - Basic Concepts of Dam Breaks and Development of Dam Break Hydrographics - Computer Program (HEC) - 7 hours

All employees attended a training film and lecture relating to sexual harrassment and a training film on the development and forecasting of tornado events •..w~on continued her education in the School of Continuing StudieS ~niversity of Nebraska at Omaha (U.N.O.) on a part-time basis. On-the-job instructions and training of new employees and existing staff members continues as duties require.

XI. PERSONNEL AND FUNDING.

a. Personnel. During the period of this report, tw~eee retired and one transferred to MRD from the Section. During Aug~e •£! )

13 with 32 years of government service and....._e...... _r with 31 years of service retired. These two had a combi~t~ years of employment in the Section. During January,~y~y transferred to MRD. Two ~1 began employment in th~t~ring the period. In September, ~ing transferred to the Section after a year of service in the Surveying and Mapping Section and many years of service in the Water Quality and Sediment Section. In January, ~~y began employment with the Government and the Section. At th~ o~eport period, there were eight full-time employees in the Reservoir Regulation Section, consisting of five Hydraulic Engineers, one Engineering Technician, one Engineering Aid, and one Clerk-Stenographer. Inclosure 7 shows the relationship between the Reservoir Regulation Section and other elements of the Omaha District. Inclosure 8 lists personnel of the Reservoir Regulation Section and their grade structures as of 31 July.

b. Hydrologic Engineering Branch. The Reservoir Regulation Section is part of the Hydrologic Engineering Branch. The functions of sediment studies, water monitoring flood reports, hydraulic and hydrology planning are performed by other sections of the Branch. The Branch is in the Engineer­ ing Division. The Planning Division performs flood benefit computations, project planning and flood plain information studies.

c. Funds. FY 1981 funds expended came from Operation and Maintenance accounts, except for $35,000 which came from the Special Investigation account to perform work mostly in connection with the FERC program and $12,000 which came from the Construction General account for support of the USGS Cooperative Stream Gaging Program. Actual and estimated costs of FY 1981 and FY 1982 as of 27 October 1981 are listed below:

Actual Estimated FY 81 FY 82 Reservoir Regulation (Labor, ADP, Travel, Equip) O&M $320,000 $360,000 SI (FERC & other) 35,000 NWS Coop Program (O&M) 36,785 35,000 USGS Coop Stream Gaging Program (O&M & CG) 826,640 681,000 Area Field Offices (O&M) 28,000 39,000 Stream Gaging Corps (O&M) 181,800 205,000

14 MAP OF FLOOD CONTROL DAMS

INCLOSURE 1 ~man

..._... N --- ...... _._ ~b 'r------~1~ --- l '-- I, 1I ' ' ~OMAHA DISTRICT BOUNDARY __. \!( ' ...... f ..._Grace C1ty ''--\ --~ ~',, LAKE ' ~~ AUDUBON' ...J ~"1,. R1verdale r-~J"/.,.. \ ...1- ' p,ngree\ JAMESTOWN DAM T H (BRI Jamestowr1 PIPESTEM DAM (c.E.)

Mussdshrl!

LAKE LOCATION MAP OAHE H \Stratford T

'19 <"'"~

LEGEND:

(C.E.) CORPS OF ENG.INEERS

(B.R.) BUREAU OF RECLAMATION

I I

FEDERAL TRIBUTARY PROJECTS I WITH FLOOD CONTROL STORAGE SCALE IN MILES U S ARMY ENGINEER DISTRICT, OMAHA 50 0 100 CORPS OF ENGINEERS OMAHA, NEBRASKA REVISED OCTOBER 1980 PROJECT DATA SHEETS - TRIBUTARY

(4 Sheets)

Corps of Engineers Dams Salt Creek Basin Dams - C.E. Papillion Creek Basin Dams - C.E. Bureau of Reclamation Dams Subimpoundment Dams (Two) - C.E.

INCLOSURE 2 SU~MARY OF ENGINEERING DATA - FEDERAL RESERVOIRS WITH AUTHORIZED FLCCD CGNTROL MISSOURI RIVER TRIBUTARIES -U.S. ENGINEER DISTRICT- OMAHA CORPS OF ENGINEER DAMS

ITEM NO. SUBJECT BOWMAN HALEY BULL HOOK - SCOTT COULEE CEDAR CANYON CHERRY CREEK COLD BROOK COTTONWOOD SPR I HGS KELLY ROAD PIPESTEM CHATFIELD BEAR CREEK

GENERAL I Location of dam 6 m1. W of Haley, N.D. I mi. S. of Havre, Mont 3.5 mi. W. of Rapid City, S.D. 10 mi. S.E. of Denver, Colo. I mi. N. of Hot Springs, S.D. 4.5 mi. W. of Hot Springs, S.D. Lowry A.F.B., Denver, Colo. 3 m1. N.W. Jamestown, N.D 2 mi. S. of Denver, Colo. 3 mi. SW. of Denver, Colo. 2 River and river- mile N. Fk. Grand R.M. 100 Bull Hook Cr.-Scott Coulee Deadman's Gulch Cherry Creek R.M. 11.4 Cold Brook R.M. I Cottonwood Springs Creek Westerly Creek Pipestem Creek R.M.3 South Platte River R.M. 321 Bear Creek R.M. 8 3 Drainage area (Sq. Mi,) 471 54 0.4 386 70.5 26 10.5 594 3.018 236 ~ Reservoir length (mi.) 2.5 m1. at el. 2755 Normally dry Normally dry 1.5 at el. 5550 1.2 at el. 3646.5 0.6 mi. at el. 3875 Normally dZ 5.5 at el. 1442.4 2.0 at el. 5430 0.5 at el. 5558 5 Location of Oamtender Ft. Peck Dam On site Oahe Dam Oahe Dam Rocky Mt. rea On site On site At Chatfield Dam 6 Tr ave 1 time to Mo. River 1 day to Shadehill Dam - - - - 8 weeks 2 weeks 2 weeks 7 Max. discharge of record 14,100 cfs April 1952 - 440 cis August 1949 58,000 cfs June 1965 8400 cfs September 1938 - 6,080 cfs April 1969 110,000 cfs June 1965 8,600 cis July 1895 cost (I) 8 Project $4 372.200 $1,837,200 $122,600 $14,670,000 $1,571.000 $2,885,000 $232 000 (Original Cost) $9,277,500 $101,130,000 $61,700,000

DA~ AND EMBANKMENT 3955.0 9 Top of dam - Ft. MSL 279~. 0 2613.3 (B.H.) 2613.3 (S.C.) 355~ .0 56~5. 0 3675.0 5372.0 1507.5 5527 5589.5 I 190 10 Length of dam • Ft. 5730 1900 (8 H ) 1500 (S.C) 1320 I ~300 925 4700 5363.0 West Emb. 4000 13,136 5.300- mam 2,100 ·South 123 II Height of dam- Ft. ~2 I~ I 127 30 107.5 147 179.5- main 65- South 79 73 (8.H ) 53 (S C ) 3832 12 Stream bed - Ft. I

SPILLWAY 80,600 cfs at el, 3667.2 39.600 cfs at e I . 3950. 3 2900 cfs at el. 5366.21 56,200 cfs at el. 1502.8 188,000 cfs at el. 5521.6 18 Discharge capacity- cfs 62,970 cfs at e1.2789 25,200 cfs at el. 2605 1~00 cfs at el. 3550.6 38.350 cfs at e I . 5636.2 153.500 cfs at el 5684.5 36~6. 5 3936.0 5500.0 2593.0 (B.H.) 0 2586.0 (S.C.) 35~5 .0 5598.0 5362.0 1496.3 566 7. 0 19 Crest e I ev. - Ft. MSL 2777 200 275 sea 20 width - Ft. 650 60 67 120 1500 800 u,gated sharp crested weir Ungated broad weir Uncontrolled Ungated converging chute 21 Gates, number, size, type Un gated earth notch Ungated earth channels Ungated rock channel Ungated earth channel Ungated earth channel Ungated earth channel •Notch in BH to 2583 Concrete U wall and chute

RESERVOIR ELEV. AND AREA 3667.2 279a. 3950.0 257a. 5366.21 43a 1502.8 7105a. 5521.6 6245a. 5684.5 1225a 22 Maxi mum poo I 2789.0 81 JOa. 2605.0 (B.H. & s. c.) - 3550.6 15a, 5636.2 ~5~2a, 3651 .~ I 98a. 3936.0 2 I ~a. 5362.0 38a 1496.3 4754a. 5500.0 4822a. 5635.5 664a 23 Top of flood control pool 2777.0 5170a. 2593.0 (B.H. & s' c' ) - 35~5. 0 II a. 5598. 0 263~a. 852a. 3585.0 36a. 3875.0 ~I a, none 1442.4 885a. 5432.0 1479a. 5558 0 I 05a 2~ Top of multipurpose pool 275 ~-8 1750a, none none 5550.0 3868.0 30a, 1415.0 62a. nont> none none none 22a 25 Top of inactiVe pool 27~0 .0 550a. none 3526.0 2a. 5528.0

STORAGE ZONES - EL>V. • CAPACITY Total-( B. H. & S.C.) 3651.~-3667 .2 36QOAF 3936.0-3950.0 32 50AF 5362.0-536621 !70AF 1496.3-1502.8 36,850AF 5500-5521.6 119,900 AF 5635 5 5684 5 46.4IOAF 26 Surcharge 2777.0-2789.0 78, 860AF 2593.0-2605.0 ~OOOAF 35~5.0- 3550.6 7~AF 5598.0-5636.2 13~.~70AF 79. 960AF 3585.0-3651 .~ 6680Af 3875.0-3936.0 7730Af 5342.0-5362.0 360AF 1442.4-1496.3 137.010AF 5432-5500.0 208,370AF 5558.0-5635 5 26.570Af 27 Flood control 275 ~-8-2777 .0 73,200AF 25~0.0-2593.0 6500AF 3526.0- 35~5. 0 123AF 5550.0-559B.O 52 0AF 3868.0-38 75.0 2~9AF 550~.0-5550.0 13,960AF 35~8.0-3585.0 none 1415.0-1442.4 9,590AF 5385-5432 26,630AF 5528.0-5558 0 1. 8 70AF 28 Multipurpose 27~0.0-275~.8 15, SCOAF none none

none none 3832.0-3868.0 '106AF none 1400.0-14150 280AF 5510-5528 0 l20AF 29 I nact i 11e 2715. 0-27~0. 0 ~, 280AF none 3512.0-3526.0 13AF none 7200AF 8385AF 30 Gross (Top of flood control poo I) 92,980AF 6500AF 136AF 93,920AF 360AF 146,880AF 235,000AF 28,560AF

OUTLET WORKS I - 8 ft cmular condu1t 2 - ll X 16 ft oval condUit l- 7 It Circular - upstream 2- 8:;12 ft. oval conduit I - u.67 ft. conduit I - 4-8 in- concrEte I - 5.5 ft. circular conduit 31 Number and size -conduits I - I 0 ft. circular conduit I - 30 in. RCP- Bull Hook I - 2~ in. C. M. P, 1- h 10.5 ft - downstream I - 30 in, RCP- Scott Coulee I - 12 ft. circular conduit I - 8 in, supply 1 ine I - 30 in. CMP 580 ft. 6 75 It 12 80 ft 1690 It 393 ft. - Bu I I Hook 230 ft' 679.5 ft. 907 ft. 32 Conduit length -Ft. 3~ I ft. Ungated drop ·nlet- el. 1442.4 Ungaled d1o~ 1nlet - el. 5558 286 ft. -Scott Coulee Ungated drop in I et . e I. 3585 Ungated drop inlet- el. 3875 X I, 35~8 I - 3X3 ft. gate- el. 3868 2 - 4 x 7 ft. hydrauliC sl1de 2 - 6 i 3. 5 ft. hydlaUIIC Slide 2 - :i x 6 ft hydraulic sl1de gates Ungated Glory Hole- el, 275~.2 I - 2~ in, va 1ve, Bu I I Hook Ungated in let - e I. 3526 5-6X9ft - hydraulic s 1 ide 3 - 12 1n. gate valves- e Ungated drop inlet - el. 5358.4 33 Nllmber - size - type I - 36 111 valve I - 3 x 3 ft sl de 2 - 2 ' 2 tt sl1de - gate on gate 2 - 1 x I fl slide - gate on gate I - 30 in. valve and slide ge: te I - 2~ in. va 1ve, Scott Cou I ec I - 8 in. v a 1ve Gated inlet · el. 5342.0 560 cf' at c I, 3 936.0 1 - 72 1n bulterfly I - 8 in. va 1 VE: 250 cfs at el. 3600.0 3651 .u Z 30D cis al el 1496 3 8400 cis at el 5500.0 2.160 cfs at el. 5667 H Discharge capacity Glory Hole- 3206 cfs at el 2789 123 cfs at 2593 - Bu II Hook ~9 cfs at el. 35~5 8100 cfs at cl, 5598' 0 15~0 cfs at el. 570 cis at el. 5362.0 30 in. valve- 1~0 cfs at el 2755 103 cfs at 2593 - Scott Cou I ee

none none none none 35 POWtR INSTALLATION none r,one none none none none

MRO FORM October 1981 1 591 6 SEP 7~ (I) Costs are as of 9·30·80 SUMMARY OF ENGINEERING DATA - FEDERAL RESERVOIRS WITH AUTHORIZED FLOOD CONTROL SPACE MISSOURI RIVER TRIBUTARIES -U.S. ENGINEER DISTRICT -OMAHA SALT CREEK BASIN -NEBRASKA

ITEM DAM NO. 2 DAM NO. ~ DAM NO. 9 DAM NO. I~ DAM NO. 17 DAM NO. 18 SUBJECT DAM NO. 8 DAM NO. 10 DAM NO. 12 DAM NO. 13 NO. (OLIVE CREEK LAKE) (BLUE STEM LAKE) (WAGON TRAIN LAKE) (STAGECOACH LAKE) {YANKEE HiLL LAKE) (CONESTOGA LAKE) (TWIN LAKES) (PAWNEE LAKE) (HOLMES PARK LAKE) (BRANCHED OAK· LAKE) GENERAL I Location of dam 1.5 mi. E of Kramer 2.5 mi. W. of Sprague 1.5 mi. N. of Holland I mi. S. of Hickman 3. 5 mi. E. of Denton 1.5mi. N. of Denton 2 mi, NW. of Pleasantdale 2 mi. NW. of Emerald SE. edge of Lincoln II mi. W. of Raymond 2 River and mileage S, Trib. of 01 ive Br. N. Tr ib. of 01 ive Br. - N. Trib. of Hickman Br. - S. Trib. of H1ckme.n Br. - Cardwe 11 Br. Holmes Cr. Middle Cr. N. Middle Cr. Antelope Cr. Oak Cr. 3 Drainage area in square miles 8.2 16.6 15.6 9.7 8.11 15.1 11.0 35.9 5.~ 88.7 0.7 3.7 ~ Reservoir length in miles 1.2 I .6 1.8 1.~ 0.7 1.~ I .5 3.0 none 5 Location of damtender none none none none none none none none none 3 hrs. 6 hr s. 6 Travel time to Lincoln, Nebr. 23 hrs. 13 hrs. Ill hr s. 8 hrs. 3 hrs. 8 hr s. 13 hr s. 7 hrs. 7 Max. discharge of record (I) (I) 8 Project cost ( I ) (I) ( I ) (I) (I) (I) (I) ( I )

DAM AND EMBANKMENT 1273.0 Top of dam - Ft. MSL 1359.0 133li.O 1312.0 129li.O 1270.0 1260.0 136~.0 1271.0 1320.0 9 7700.0 10 Length of dam - Ft. 3020.0 2760.0 1650.0 2250.0 3100.0 3000.0 2075.0 5000.0 5200.0 63.0 58.0 65.0 55.0 70.0 II Height of dam T Ft. ~5.0 57.0 52 .o 118.0 52.0 1206.0 1218.0 12 Stream bed - Ft. MSL 13111.0 1277.0 1260.0 12116.0 1218.0 1197-.0 1306.0 1250.0 Clay - sand 13 Abutment formation Clay - sand - silt Clay- sand Clay Clay- sand Clay - sand Clay - sand Clay - sand- si It Clay - sand Clay · sand • silt Rolled earth Rolled earth Ill Type of fi 11 Rolled earth Ro 11 ed earth Rolled earth Rolled earth Rolled earth Ro 11 ed earth Ro 11 ed earth Rolled earth 870000 900000 2460000 15 Fill quantity in cubic yds. 312000 1171000 376000 3711000 502000 658000 610000 17 Sep. 1962 21 Aug. 1967 16 Date of closure 20 Sep. 1963 12 Sep. 1962 2ll Sep. 1962 27 Aug. 1963 5 Oct. 1965 211 Sep. 1963 26 Sep. 1965 16Jul. 196'1 21 Jun. 1967 2 Jun, 1965 18 Jan 1973 17 Date of initial fi 11 30 Jun. 1965 6Jul. 1963 211 Jun. 1963 25 May 1965 10 Jun. 1967 May 1965 18 Mar. 1969

SPILLWAY 800 at el. 1269.7 7825 at el. 1317.5 15875 at el. 1357.1 22925 at el. 1331.7 23210 at el. 1309.8 17565 at el. 1291.6 12100 at el. 1267.8 27220 at el. 1258.2 25200 at e 1 • 136 I • 6 19875 at el. 1269.1 18 Discharge capacity CFS 1266.0 1311.0 19 Crest elevation - Ft. MSL 1350.0 1322.5 1302.0 1285.0 1262.0 1252.0 1353.0 1263.5 '100.0 700.0 50.0 200.0 20 Width in Ft. 3110.0 3~0.0 ~30.0 '130.0 1100.0 750.0 Ungated earth channel Ungated earth channel Ungated earth channel Ungated earth channel 21 Gates, number, size, type Ungated earth channel Ungated earth channel Ungated earth channel Ungated earth channel Ungated earth channel Ungated earth channel

LI207A. RESERVOIR ELEVATION AND AREA 755A. 1361.5 645A. 1269. I 1780A. 1269.7 ~70A. 1317.3 875A. 1291.6 6115A. 1267.8 620A, 1258.2 1311.0 36LIOA. 22 Maximum pool 1357 .I li70A. 1331.7 995A. 1309.8 620A. 1355.0 505A. 1263.5 lli70A. 1266.0 ~lOA. 117SA. 1252.0 none 23 Top of flood control pool 1350.0 35SA. 1322.5 660A. 1302.0 660A. 1285.0 1190A. 1262.0 none none none none none none none IOOA. 12811.0 1780A. 211 Top of joint use pool none none 230A. 1341.0 255A. 1211~.3 728A. 12112.5 196A. 12ll11.9 208A. 1232.9 1275.7 1270A. 25 Top of conservation pool 1335.0 I?LIA. 1307.11 31SA. 1287.8 303A. 1271.1 230A. 1337.4 205A. 121111.3 7~8A. 12~0.0 7SA. 196A. 12111.9 175A. 1232.9 26 Top of sediment pool 1335.0 1711A. 1306.1 290A. 12811.6 225A. 1271.1

3270AF 1311.0-1317.3 2LI720AF STORAGE ZONES- ELEVATION CAPACITY 112li5AF 13550-1361.5 3790AF 1263.5-1269.1 9060AF 1266.0-1269.7 91120AF 1302.0-1309.8 5990AF 1285.0-1291.6 3725AF 1262.0-1267.8 31 SOAF 1252.0-1258.2 5730AF 1.2811.0-1311.0 71570AF 27 Surcharge zone 1350.0-1357 .I 2910AF 1322.5-1331.7 8030AF 1341.0-1355.0 5250AF 12llli.3-1263.S 21010AF 12112.1.-1266.0 7220AF 1287.8-1302.0 6790AF 1271.1-1285.0 li700AF 12llll.9-1262.0 5560AF 1232.9-1252.0 none 28 Exclusive flood control zone 1335.0-1350.0 3980AF 1307.11-1322.5 none none none none none none 210AF 1275.7-12811.0 127~0AF 29 Joint use zone none none none 810AF none 12~0.0-12112 .II 830AF none 12111.9-1211'1.9 570AF none 1337.4-1341.0 570AF 1250.0-1275.7 13250AF 30 Conservation zone none 1306. 1- 1307. ~ 380AF 12811.6-1287.8 2020AF 1206.0-12Lill.3 BE I OAF 1218.0-12110.0 1911CAF 1218.0-12111.9 1430AF I 197.0-1232.9 2610AF 1306.0-13374 97560 AF 31 Sediment pool zone 13111.0-1335.0 11190AF 1277.0-1306.1 2660AF 1260.0-128ll.6 1660AF 12116.0-1271.1 29520 AF 6510 AF 66ll0 AF 7560 AF I 06ll0 AF 8080 AF 32 Gross Storage (Excl. of surcharge) 51170 AF 10260 AF 9280 AF

OUTLET WORKS I I - CMP- 60" Dia. I - CMP - concre~e I - CMP - 118" Dia. I - CMP - 112" Dia. I- CMP- 112" Dia. I - CMP- 60" Dia. 33 No. and size of conduits I - CMP - liB" Dia. I - CMP- 60' Dia. I - CMP - 60" Dia. I - CMP - 60" Dia. Lined - 72" Dia. 320 370 299 280 300 335 382 3~ Conduit Length - Ft. 280 313 318 I - 36" X 36" Lift gate I - LIB" X 72' Lift gate I - 36" X 36" Lift gate I - 36" X 36" Lift gate I - 36" X 36" Lift gate I - 112" X Sll" Lift gate I - 112" X 60' Lift gate 35 Gated outlets (No. - size -type) I - 36" X 36" Lift gate I - 36" X 36" Lift gate I - 36" X 36" Lift gate 2 - 30" X 96" - 12119.0 2 - 112" X IIIII" - 128li.O 2 - 30" X 96" - 1292.11 2 - ·211" X 72" - 1277. I 2- 18" X 63" - 1250.0 2 - 211" X 63" - 131\1.0 2 - 311" X 120" - 12111\.3 36 Ungated outlets (Openings - size - elev.) 2 - 211" X 72" - 13110.9 2 - 30" X 96" - 13 13 I 5 2- 30" X 96" - 12'12.3 2 - 12" X 36"- 12ll2.5 2- 12" X 30"- 1271.1 2 - 12' X 30" - 12llll.9 2 - 12" X 30" - 1335.0 2 - 12" X Sll"- 1307.11 2 - 12" X 511' - 1287.8 2 - 12" X 511' - 1232.9 60 300 80 95 IllS 210 37 Disch. capac. - CFS (at base of EFC zone) 80 75 75 80 none none none none none none none PO~ER INSTALLATION none none none 38 No. and size of turbines 39 No. and rating of generators '10 Plant capacity Ill Pwr Plt disch capac (at base of EFC zone)

(1) Total project financial cost including all dams = $12,075,000 (Costs are as of 9-30-80) September 1980 SUMMARY OF ENGINEERING DATA-FEDERAL RESERVOIRS WITH AUTHORIZED FLOOD CONTROL MISSOURI RI YER TRIBUTARIES- U.S. ENGINEER DISTRICT- OMAHA PAPILLON CREEK BASIN- NEBRASKA

~6~ SUBJECT DAM NO. 16 DAM NO.I!

liUil..ll I Location of D.., 132nd and Fort Street 93rd State Street 2 R iver and 14 ilea!f; Tributary Big Papio - 1\nilht Creek - 3 Drainage Area Sq. 14i.) 6 17. ~ Resei"IIOir length in miles 1.0 2.5 5 Location of O..,tender None None 6 Travel time to 14o. River 5 - 10 Hours 5 - 10 Hours 7 14ax. discharge of record - - 8 Project cost ( I ) $4,399,000 $11,667,000

DAM AMP fMRAMKMEJII 9 Top of d"" - Ft. 14SL 1130 1152 10 Length of dam - Ft. 1460 1940 II Height of dam - 70 67 12 Stream bed - Ft. 14SL 1060 1085 13 Abutment fonnation Lean clay loess Lean clay loess I~ Type of fi II Rolled earth Rolled earth 15 Fill quantity in cu. yds. 481,000 656,000 16 Date of closure 3 Oct 1972 5 Aug 1974 17 Date of initial fill 24 Oct 1977 2 Sep 1977

SPILLWAY 18 Discharge capacity - CFS (Max. Pool) 9,500 18,700 19 Crest elevation - Ft. MSL 1121 11~2 20 Width in Ft. 250 700 -21 Gates, nllftber,size, type Ungated earth channe I Ungated earth channe I

RE~ERVO I R fLEV AND AREA 22 Max inun pool 1127 368a. 1147 1171a. 23 Top of flood control pool 1121 302a. 1142 992a. 24 Top of multipurpose pool 1104. 137a. 1121 392a. ~

STORAGE ZONES - ELEV. --CAPACITY 25 Surcharge 1121-1127 2,010AF 1142-1147 5,410AF 26 Flood control 110'1-1121 3, 720AF 1121-1142 14,000AF 27 Multipurpose 1060-1104 I, SOOAF 1085-1121 3,910AF

OUTlET WORK~ 28 Nunber and size of conduits I - RCP- 36'' d1aneter I- RCP- 4.5 ft. dianeter 29 Conduit I ength - Ft. 736 680 30 Gated outlets (Mo. - size - invert elev of intake I - 30'' dianeter - 1080 I- 30'' diameter- 1100 in Ft. 14SL) 31 Ungated outlets(No.-size-invert elev -Ft.MSL) 2- 1.0' x2.5'-1104 2 - 1.5' X 5.0' - 1121 1 X 6.0 - 1109 X 32 Disch. cao. - CFS (at base of EFC zone) ~- 3.0' ~- 2.4' 9'0' - 1127.5

33 POWER INSTALLATION Hone Hone

~~EP rg~ 1590 (I) Cost as of 9-30-80 September 1980 SUMMARY OF ENGINEERING DATA - FEDERAL RESERVOIRS WITH AUTHORIZED FLOOD CCNTROL SPACE MISSOURI RIVER TRIBUTARIES -U.S. ENGINEER DISTRICT -OMAHA BUREAU OF RECLAMATION DAMS

ITEM SUBJECT BOYSEN CANYON FERRY CLARK CANYON GLENDO HEART BUTTE JAMESTOWN KEYHOLE PACTOLA SHADEHILL Tl BER (2) YELLOWTAIL GENERAL I 20 mi. S. of Thermopolis, Wy 15 mi. E. of Helena Mont. 18 mi. SW of Dillon, Mont. 4.5 mi. SE of Glendo, Wyo. 15 mi. S. of Glen Ullin, N D. Location of dam I mi. N. of Jamestown. N.D. 12 mi. HE of Moorcraft, Wyo. 15 m1. W. of Rap1d C1ty. SO 1 mi. W. of Shadehill, S.D. 15 mi. SW of Chester, Mont. 45 mi. SW of Hardin, Mont. Bighorn R.M. 295 Missouri R.M. 2 River and mileage 2253 Bea~erhead North Platte R.M. 280 Heart R.M. 103.5 James R.M. 580 Belle Fourche R.M. 289 Rap1d Cr. R.M. 110 Grand R.M. 90 Marias R.M. 71 Bighorn 3 Drainage area in square miles 7710 15900 2320 14330 1710 1760 1950 319 3120 4850 19.626 ~ Reservoir length in miles 17.5 at el. 4725 25 at el. 3800 5 at el. 5560 4 15 at el. 4635 12 at el. 2094.5 40 at el. 1454 10 at el. ~Ill.~ 4. 5 at el. 4621.5 10 at el. 2302 25 at el. 3012.5 71 at el. 3657 5 Location of damtender On site On site Dillon. Mont. On site On site none Pacto 1a Dam a~ site On site On site On site 6 Travel time to Missouri River 6 days 4. 5 days to Ft. Peck 2. 5 days to Three Forks About 3 weeks 2 days About 7 weeks 5 days 3 days 2 days 1.25 days 4 days 7 Max. discharge of record 29,800 CFS Jul. 1923 47000 CFS Jun. 1908 3 720 CFS Jun. 1908 30,000 CFS Jun. 1908 3 0. 500 CFS May 1970 ±8000 CFS Apr. 1969 I 2, 000 CFS Apr, 192~ May 1952 58.000 CFS Apr. 1950 40,000 CFS Jun. 1948 37.400 CFS Jun. 1935 8 Project cost (I) 2200 CFS $33,498,000 $42' 546' 000 $12.108,000 $44,371.000 $3,576,000 $3,717,000 $~' 722,000 $7.B61.000 $7.269.000 $45,620,000 $95,900,000

DAM AND EMBANKMENT 3021.0 (2) 9 Top of dam- Ft. M.S.L. 11758.0 3808.5 5578.0 11675.0 2 12~.0 1~71.0 4134.0 4640.0 2318.0 3660.0 10 Length of dam - Ft. I 1~3 1000 2950 2096 1850 1~18 3420 1300 12,8110 4300 11150 II Height of dam - Ft. 150 168.5 133 167 I 2~ 85 118 220 I 22 197.5 ~911 12 Streambed- Ft. M.S.L. 11608 11635.5 511~5 ~508 2000 1386 4016 4420 2196 2823.5 3166 13 Abutment formation Sandstone•ahale-1 imestone Sha 1e· s 1ate Sand-bentonitic tuff Sandstone-aha 1e Sandstone Pierre shale Sandstone and shale Slate and schist Sand, silt and c 1ay Shale and sandstone Limestone I~ Type of fill Rolled earth Concrete gravity Rolled earth Ro 11 ed earth Rolled earth Ro 11 ed earth Rolled earth and rock Rolled earth and rock Rolled earth Rolled earth Concrete arch 15 Fill quantity in cubic yds. I ,527,000 ~07' 100· 1,88~,000 2,676,000 I, 140,000 963,000 1,329,000 4,225,000 3,391,000 11,320,000 I ,5116,000 16 Date of closure Oct. 1951 Mar. 1953 Aug. 1964 Jun. 1956 Aug. 19~9 May 1953 Mar. 1952 Aug. 1956 Ju I. 1950 Oct. 1950 Dec. 1966 17 Date of initial f i 11 \top of conser. poo 1) Jun. 1952 Jul. 1955 Jun. 1965 May 1959 Apr. 1950 Apr. 1965 May 1978 Jun. 1963 Apr. 1952 Aug. 1956 Jun. 1967

SP I LUIAY (Service) 18 Discharge capacity CFS (Max. pool) 20,000 at el. 11725 150,000 9530 10,300 5650 2930 I 1000 38,1100 5700 127,000 CFS 54.000 (2) 92000 19 Crest elevation - Ft. M.S.L. 11700.0 3766.0 5560.11 11653.0 20611.5 1~511 11099.3 ~62 I. 5 2272.0 2302.0 2980.0 (2) 3593.0 20 Width in Ft. 60 (net) 66 (total) 2011 (net) 222 (gross) 100 115 27 9.5 19.25 250 - 1500 96 (net) 50 (net) Ungated glory Ungated ogee weir Ungated Ungated 2 - 25X611.~ ft radial 21 Gates, Number, Size, Type 2 (30X25 ft) radial II (51X311.5 ft) radial Ungated chute Ungated ogee weir Ungated glory hole hole Ungated ogee weir 3 - 32X20 It radial glory hole earth channe 1

RESERVOIR ELEVATION AND AREA 6600a. 4669.0 23,300a. 10,950a. 146~.11 20,000a. 11128.2 20,~90a. 4633.7 1350a. 2312.0 12, 150a. 30 Ill. 9 23 ,800a. 3660.0 17 ,958a. Max i mum poo I 11752.0 30, 770a. 3800.0 35,180a. 55 71.9 2 I 18.2 22 13,690a. 4621.5 1220a. 2302.0 9900a. 3012.5 23, 150a. 3657.0 17,298a. 23 Top of flood centro 1 poo 1 11732.0 22,200a. 3800.0 35, 180a. 5560.4 5903a. 4653.0 18,000a. 209~.5 6625a. 145~.0 13,250a. ~I I I .5 11132.67 2560a. - 2272.0 ~800a. 2992.3 17,680a. 36110.0 12,685a. 24 Top of joint use pool 11725.0 19,600a. 3797.0 311,~36a. 5546.1 5160a. - - 31100a, 11129.8 2 IOOa. 11099.3 9390a. 2260.0 3600a. 2973.0 I 3, 070a. 361~.0 7~10a. 25 Top of conservation poo 1 11717.0 17, JOOa. 3770.0 211, 126a. 5535.7 4496a. 4635.0 12.400a. 206~.5 4580.2 860a. 2030.0 800a. 1~00.0 160a. 1105 I .0 910a. 2250.8 2800a. 2967.0 I I ,810a. 35'17.0 11192a. 26 Top of inactive pool ~685.0 9,1100a. 3728.0 I 1,~79a. 5470.6 209a. 4570.0 3,130a. 4455.0 84a.

STORAGE ZO~ES - ELEVATION - ~APAC. 7 I, 800AF 4653 0-4669.0 329,300AF 209~.5-21 18.2 200, 500AF 1115~.0-1'16~.11 I 58900AF Ill I I .5-'1128.2 283, 200AF 4621.5-4633.7 15,800AF 2302.0-2312.0 109, OOOAF 3012.5-301~.9 56,300AF 3657.0-3660.0 52 ,8~0Af 27 Surcharge zone ~732 .0-11752.0 523,000AF none 5560.'1-5571.9 79, IOOAF 4635.0-4653.0 271, 900AF 206'1.5-209'1. 5 150,000AF 1110,200AF 2272.0-2302 216,000AF 2973.0-3012.5 709, 2~0AF 36110.0-3657.0 259,000Af 28 Exclusive flood control zone ~ 725. D-'1732 .0 150 ,OOOAF 3797.0-3800.0 10'1, 300AF 55116. I -5560. ~ 1~32.7-111~.0 I 85.IIOOAF 11099.3-'11 I 1.5 4580.2-4621.5 43 ,OOOAF .o none none 36111.0-36~0.0 250,000AF 29 Joint use zone '1717.0-11725.0 150,00C•AF 3770.0-3797 .o 799, IOOAF 5535.7-55116. I 50,'100AF none 11129.8-11132.7 6600AF none none none 126, IOOAF 2030.()..20611.5 68, 700AF 2250.8-2272.0 8~,000AF 2967.0-2973.0 711360AF 35117.0-361~.0 363,670AF 30 Conservation zone ~685.0-11717.0 ~ IO ,OOOAF 3728.0-3770.0 713 ,OOOAF 51170.6-5535.7 4570.0-4635.0 454,300AF 1~00.0- 11129.8 28, IOOAF 1105 I • D-~099. 3 J90,1100AF 4456.1-4580.0 55,000AF 200~.0-2030.0 6800AF 58, OOOAF 2823.5-2967.0 5811 ,660AF 3166.0-3547.0 502 ,330AI 31 '1615.0-11685.0 260,000AF 3635.0-3728.0 11311 ,500AF 5~115.0-5H0.6 1510AF 4508.0-4570.0 63. 200AF 1386.0-11100.0 820AF 11016 .D-~051. 0 9,500AF 4420.0-4456.1 1,OOOAF 2200.0-2250.8 Inactive zone 225,500AF 358,000AF I , 368, 200AF I, 375,000AI 32 Gross storage (excl. of surcharge) 970,000AF 2, 050, 900AF 257 ,200AF 789,400AF 220, 900AF 623,300AF 99,000AF "

OUTLET WORKS I - 63 in. I. D. 1 - 6 ft. I - 7 ft. I .D. I conduit cont.a+n.i ng 2 - 8'1 in. I - 66 in. J.D, ~-811in. I .D. I - 9 ft. J.D. I - 2 I ft. I. D. 1-9.5ft. - 13.5 ft. I - 9.5X8.25 33 No. and size of conduits I - 22" pipes I - 9. 5 ft. I - 57 in. I .D. I - 13 ft. I.D. pump intake I - 72", 2300 597 355 72" - I I 10 22' - 1090 289 216 305 3'1 Conduit 1ength - Ft. 300 811in.-JI5 7~ I 11'13.75 653.'1 740 - - 3- 7.25X7.75 ft. Slide 1 - ~xs ft. SJ ide I - 6X6 ft. r ad i a I J-5X5' slide, I I 18" butterfly 3- bulkhead gates No. -Size- Type gates 2 - ~8 in. Jet valves ~ - 77 in. S1 ide 2 - 3X6.5 ft. S1 ide· 2 - 5X6 ft. s 1 ide 2 - 3.5X3.5 ft. slide 2- 2.75X2.75 ft. slide 35 690 1300 at el, 2973 8~ in. - 2500 each 66 in. - 6'10 ~ • 8'1 in. 9500 2200 I I ,300 2 I 75 at e 1. 1~29.8 1250 1020 600 at el, 2260 36 Discharge capacity-CFS (at base of EFC zone) 9.5 ft. - 862 57 in. - 670 I - 13 ft. 530

POWER JNSTALLAT JON 2- 16,750 HP none none ~ - 87,500 HP Mo. and size of turbines 2 - 10,500 HP 3 - 23,500 HP none none none none none 37 ~ ·- 62,500 K\11 38 No. and rating of generators 2 - 7500 KW 3 - 16,667 K\11 2 - I 2 ,000 K\11 211,000 K\11 250,000 K\11 39 Plant capacity 15,000 KW 50,000 K\11 3300 CFS 7800 CFS ~0 Pwr pit discharge capac. (at base of EFC zone 2300 CFS 5200 CFS

(1) These costs to complete the dam and reservoir, the associated recreation and fish and wildlife facilities and the power plant September 1980 were applicable. Costs do not include irrigation facilities except those located at the dam. Costs are as of 6-30-76.

(2) Valves shown for Tiber were 1n effect prior to 1965. Restrictions placed on use of the spillway after the 1965 high pool voided our flood control agreement. A cofferdam completed in June 1969 currently pre~ents water from reaching the spillway until repairs can be made. An auxil1ary outlet works (5,000 c.f.s. capacity) was also completed at this time. As of this date repaus are under way to raise the dam to ele~. 3026 ft. m.s.l. and rehabilitate the spillway to discharge 68.500 c.f.s. at a new crest ele~. of 2975.0 ft. m.s.l. PERTINENT DATA PERTINENT DATA SNAKE CREEK. DAM (LAKE AUDUBON) (LAKE POCASSE) Location - On Snake Creek arm of Lake Sakakawea, approximately 12 miles northeast of Garrison Dam, North Dakota. Location _ On Spring Creek arm of Lake Oahe, at Pollock, South Dakota

Purpose - The dam and reservoir are a relocation route for trans­ Purpose _ It is a road relocation route for the area inundated by Lake portation faciltties and utilities which were inundated by Lake Oahe. Control structures are provided to regulate Lake Pocasse for Sakakaw·aa, a regulating reservoir for the Bureau's Garrison Diversion fish and wildlife and recreation. In the future it will be used as Unit, and provide for fish and wildlife and recreation. a regulating reservoir for the Bureau's Pollock Herrid Unit. This unit will pump water from Lake Oahe and use it for irrigation and Drainage Area- 250 sq. mi. (110 sq. mi. of which is non-contributing) •. M & I water for the two towns.

Dam and Embankment Drainage Area - 660 Sq. mi. (330 sq. mi. of which is non-contributing).

Type of Fill - Rolled Earth Dam and Embankment Top of Dam Elev. - 1865 ft. m.s.l. Length of Dam - 12,900 ft. Type of Fill - Rolled Earth Height of Dam - 85 ft. maximum Top of Dam Elev. - 1625 ft. m.s.l. Streambed - 1780 ft. m.s.l. Length of Dam - 3,200 ft. Date of Closure - 1952 Height of Dam- 40 ft. maximum Date of Initial Fill - Not Yet Streambed - 1585 ft. m.s.l. Date of Closure - 1961 Spillway - None (An original designated ungated spillway of 3 - 60" Date of Initial Fill - Between 1961 and 1964 culverts with a crest of elevation of 1850 was filled in and closed in 1972 when the embankment was widened to provide for a four lane Spillway -Nine 6x8 ft. Uncontrolled box culverts with a crest elevation highway. It was located 180ft. north of regulating conduit). of 1617 ft. m.s.l.

Reservoir Elevations, Area and Capacity Reservoir Elevations, Area and Capacity

Ft.m.s.l. Acres Acre-Feet Ft.m.s.l. Acre-Feet

Maximum Normal Operating Pool 1850 20,620 396,000 Spillway Crest 1617 11,000 Minimum Normal Operating Pool 1847 18,780 336,870 Top of Conservation 1616 9,500 Top of Inactive Pool 1810 1,450 13,180 Bottom of Conservation 1613 6,000 Streambed 1780 0 0 Top of Inactive Pool 1602 1,000 0 Streambed 1585 Outlet Works - A 7xl0 ft. reinforced concrete conduit, invert elev. 1810, regulated by a motor or hand operated 7xl0 ft. sluice gate. Outlet works - One 5 ft. CMP conduit with a 5x5 ft. sluice gate, in­ Located about 3000 ft. south of north end of main embankment. Discharge vert elev. 1602 and a 5xl2 ft. overflow roller gate, invert elev. 1609. capacity 2,300 c.f.s. under 15ft. head differential. Two 7'xlO' bulkheads one on each side of sluice gate. Stilling basin on Garrison side. I TOTAL :NUHBER OF FLOOD CONTROL \ RESERVOIRS IN THE OMAHA DISTRICT MONITORED AND/OR REGULATED AND REPORTED BY THE RES. REG. SEC. (Prior to 1960 most projects were in the Ft. Peck or Garrison Districts)

As of Main Tributary Total* lJan Stem CE USBR

1937 0 0 0 0 1938 l(Ft P) 0 0 1 1939 1 0 0 1 1940 1 0 0 1 1941 1 0 0 1 1942 1 0 0 1 1943 1 0 0 1 1944 1 0 0 1 1945 1 0 0 1 1946 1 0 0 1 1947 1 0 0 1 1948 1 0 0 1 1949 1 l(C Crk) 0 2 1950 1 1 l(Hrt Bt) 3 1951 1 1 3(Sh & Tibr) 5 1952 1 1 4(Boy) 6 1953 2(Ft R) 2(C Brk) 5(Keyh) 9 1954 3(Gar) 3(K Rd) 6(Jam) 12 1955 3 3 6 12 1956 4(G Pt) 4(BHSC) 6 14 1957 4 4 8 (Glen ,Pact) 16 1958 4 4 8 16 1959 5(0ahe) 4 8 17 1960 5 5(C Cyn) 8 18 1961 5 5 8 18 1962 5 5 8 18 1963 5 8(Salt) 8 21 1964 6(Big B) ll(Salt) 8 25 1265 6 12(Salt) 9(C Cyn) 27 1966 6 14(Salt) 9 29 1967 6 15(B Hly} ll(Yl & CF) 32 1968 6 16(Salt) 11 33 1969 6 16 11 33 1970 6 17(Cot S) 11 34 1971 6 17 - 11 34 1972 6 17 11 34 1973 6' 17 11 34 1974 6 20(Pip,Cht ,Pap) 11 37 1275 6 21{Pa:Q} 11 38 1976 6 21 11 3S 1977 6 21 11 38 1978 6 22(Bear) .11 39 1979 6 i 22 11 39 1980 6 I 22 11 39 I ' 1981 6 22 11 39 *Two subimpoundments (Lake Pocasse and Snake Creek) not included.

INCLOSURE 3 Fi.Oh' PERIODS:

• :.JATER YEAR 1980-1981 A ~PRIL-JULY OR SEASONAL >100% of Normal <50~~ of Normal

zH 0 r PE:lCENT OF NOR.'lAL RUNOFF 0 Cfl (AT PERTINENT LOCATIONS' c:::: ::>;:! trl OMAHA DISTRICT .. K•~•..,.. _,~It.. E"'11ooooor- REGULATION SHEETS FOR PAST YEARS

InCLOSURE 5 BEAR CREEK A~ID LAKE BEAR CREEK, COLORADO 198 0-1981 REGULATIGrJ

...J. Cl) . 560 5600 ~ w > 0 5580 tO 5580 <( 1- UJ BASE OF FLOOD CONTRO L ZOJIJE w 5560 5560 LL. z z 5540 5540 0 1- ~ UJ 5520 520 ...J LaJ

7J 72 73 74 75 76 77 78 7 9 8 ') A S 0 N D J F M A M J J YEARS 1980 1'.181

The Rear . Creek inflovl normally passes through the project via a drop inlet-outlet structure and to the dovmstream over a crested v1eir v1here an irrigation is located. 3ear Creek streamflow normally maintains the pool level to between 5,558 to 5,560 ft. m. s .1. This year, runoff from the accumulated snmJpack above :Sear Creek was only about 40-50 percent of norr:1al. The heaviest precipitation occurred in ~ay '"her. the Evergreen station recorded 5.10 inc:1es. T:1e maximum pool achieved during the period '-ms 5559.18 ft. m.s.l., occurring on 4 June. TI1e maximum daily average infloVJ was 120 c.f.s., occurring on 3 June. The maximum outflmJ of 120 c. f. s. also occurred on 3 June. no flood control ~as achieved during this period. BOWMAN-HALEY DAH MID LAK!: GRAND RIVSR BASIN, NORTE :lAKOTA 1980-1981 REGULATION

2770 770 ...J. (/) . 27 G5 7 65 :2 w > 0 27 60 co 760 < ~ BASE OF FLOOD CONTROL ZONE UJ w 27 55 7 55 ~ z z 27 50 750 0 1- ~ UJ 2745 745 ...J LaJ

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 1981

ry Heather conditions in most of t:1.e Upper Missouri River .3asin were reflected in the or..tinued decline of ti1.e Bowman-Haley Reservoir pool elevation. For the second year in row and the second time since the initial fill of the reservoir in March 1969, the onservation pool did not fill. The maximum pool was 2752.7£ ft. m.s.l. on 1 August 1980. uring the period, the maximum daily inflm·l of approxi..!lately 12oJ c.f.s. occurred on 11 July 1981 ~vhen 2.25 inches of rain -v1as reported. T~1e only outflmv during the period ere controlled releases made from 1-29 August 1980 for tc1e en:1ancement of floHs for ildlife and livestock. The maxil1mm release \vas 7 c.f.s. on 1, 13-28 August 1980. No lood control was ac:1ieved during the period. BULL HOOK - SCOTT COULEE DANS (HAVRE PROJ:SCT) XILK RIVER :SA.SIN, MONT AriA 1980-1981 REGULATIOX

. ..J. (/). ~ NORI:-fALLY DRY w > 0 ttl < t- UJ w LL z - NO RECORDS KEPT z 0 1-- ~ UJ ..J LaJ

7J 72 73 74 75 76 77 78 79 80 ASOND JFMAMJ J YEARS 1980 1981

Bull Hool~ and Scott Coulee Dams were not designed to store or hold water. U~der normal conditions the low level gates are kept partially open. However, before freeze-up each year, the gates are closed and are not opened u~til such time after the onset of t~e spring runoff vJhen the vmter level of the Milk River has dropped satisfactorily. This is done to prevent flooding behind tlle Hilk River levees. During the fall a~d winter months, snow accumulatio~s in the Hilk River drainage averaged less thef' 40 percent of normal. Dry conditions prevailed through the balance of the period, so that at ~o time was there sufficient rainfall or sno"Wmelt accumulated in the project to pass through the outlets. No flood control was achieved during tlle period. CEDAR CANYON DAH (RED DALE GULC'i) RAPID CREEK BASI~T, SOUT:-1 DAKOTA 198 0-1981 R:SGULATIO!T

...J (f). ~ NORHALL Y DRY w > 0 al <(

~ UJ UJ LL. z z 0 NO RECORDS KEPT ~ ~ UJ ...J 1IJ

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 1981

This reservoir is normally dry. Any inflo•.;rs which occur pass tl-rrough an ungated low level outlet. No water accumulated in Cedar Canyon this year; therefore, no flood control was achieved during this period. CHATFIELD DAM AND LAKE SOUTH PLATTE RIVER 3ASIN, COLORADO 1980..,1981 RESERVOIR RSGULATim;

-·5450 5450.. -·

...J. 544 BASE OF FLOOD CONTROL ZONE 5440 (f). ~ w 543 5430 > 0 co < 542 542Cl 1- l1J w LL -z 541 541Cl z 0 1- ~ UJ ...J l&J

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 1981

At Clmtfield, releases from the conservation pool are determined by the Colorado State Engineer's District 8 Hater Coilli-nissioner, in order that the releases by the project meet streamflo;.; water right requirements. Since 1979 the City of Denver through the State of Colorado has been permitted to regulate storage in the conservation pool in return for the City's commitment to provide sufficient water in the pool for recreation. The authorized target pool ranged bet,veen 5432.0 to 5430.9 fro:n 1 August to 21 July. During late July a gradual dra,~own of the pool to reach 5426.~2 by 1 September 1981 'vas initiated by the City of Denver. The target pool on 31 July \vas 5429.4. A small encroachment of about 1 foot was permitted for about 20 days during April to assist local interests. The maximum pool achieved during the period was 5432.98 on 8 April (1,500 A. F. of 208,400 A.F. of flood- storage space or 1 percent was utilized). The peak daily inflow was 454 c.f.s. on 3 August. Outflm• on this date vJas 412 c.f.s. The peak outflmv was 535 c.f .s. on 5 August. No flood control tvas achieved during the period CHERRY CREEK DM'l AND L.'\.KE CHERRY CREEK, SO:JTH PLATT:S RIVER BASIN, COLORADO 1980-1981 REGULATION

5600iiiliiii~TiOP~OiF~F~L~OiOD~C~O;N;T;R;OiL;ZiO;N~E~~~;;;;;; -·5600 ...J (/). ~ 5590,..... w > 0 a.l <( 1- UJ w 557 5570 u. z z 5560 5560 0 1- ~ BASE OF FLOOD CONTROL ZONE\ liJ 5550 sso:o ...J l&J

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 1981

The maxinum pool level of 5550.06 ft. m.s.l. for the reporting period was achieved on 1 August 1980. Due to a lacl: of fall precipitation and evaporation losses, t:1e minimum pool elevation was 5548.81 ft. m.s.l. on 20 !:-Tovember 1980. The snowpaclc during the winter was only 40 percent of normal. The maxi..rnum daily inflmv was 30 c. f. s. on 18 Hay 1981. The outflovl ,.,as zero throughout the period. No flood control was achieved during the period. COLDBROOK D&~ AND LAlZE FALL RIVER BASIN, SOUTH D~\KOTA 1980-1931 REGULATimJ

.J C/). ~ w 3610 610 > 0 al <( 3600 600 1- UJw u. BASE OF FLOOD CONTROL ZONE z 3590 3590 z 0 1- 3580 p580 ~ UJ .J LIJ 3570 57 0

7J 72 73 74 75 76 77 ?P. 79 80 A S 0 N D J F M A M J J YEARS 1980 1981

The Coldbrook Reservoir pool rose only slightly during the early spring due to light precipitation and deficient snowmelt runoff. The maximum pool elevatio~ of 3579.06 feet m.s.l. was achieved on 10 April 1931. A slight decline in the lake elevation during the summer was due to evaporation losses and releases made to satisfy a do\mstream water right. The maximum outflow and inflo\v ~;ere both less then 5 c.f.s. No flood control was achieved during the period. COTTm!WOOD SPRINGS DA..'1 MID LAKE FALL RIVER BASIN, SOUTE DAKOTA 198 0-1981 REGULATIOl~

..J. C/). BASE OF FLOOD CONTROL ZONE ~ w 3870 870 > 0 CD <( .... 3860 860 UJ w u. z 3850 850 z 0 .... 3840 840 ~ UJ ..J liJ 3830 830

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 1981

The maximum pool elevation of 3843.5 ft. m.s.l. at Cottonwood Springs La~e for this reporting period occurred at the beginning of August 1980. Due to a deficient snowpack and drought conditions, the lake steadily declined to the lowest point since 1977, 3838 • .6, feet at t:1e end of the period. Precipitation duri:1g Nay, June, and July kept the lake from any further decline. no Hater has ever been released from the dam. ~o flood control was achieved during the period. KELLY ROAD DAL'f SAi'ill CRE:LK BAS I:T, COLORAD 0

...J . NORMALLY DRY (/). ~

LLJ > 0 tO < 1- UJ UJ u.. z z 0 NO RECORDS KEPT 1- ~ l1J ...J L&J

7J 72 73 74 75 76 77 78 7 9 8 () A S 0 N D J F M A M J J YEARS 1980 1981

~elly Road Project is not designed to store ~vater. Any inflows ~vi1ich occur pass through

... he ungated lmv level outlet. Construction work on the modification of the embanl®ent 1 and emergency spillway was completed on 27 October 1979. During this reporting period, !no significant runoff from snowmelt or rainstorms >vas impounded. A::ty inflow was auto­ ~atically passed in an orderly manner. No flood control >vas achieved during this period. GLEl

...J. TOP OF FLOOD CONTROL ZONE (J) . 1140 1140 ~ w > 0 1130 1130 al <(

1- ~BASE OF FLOOD CONTR OL ZONE UJ w ll20 1120 1L z z 1110 1110 0 .... ~ UJ 1100 1100 ...J liJ

7J 72 73 74 75 76 77 78 79 80 ASOND JFMAMJ J YEARS 1980 1981

The maximum pool level achieved during the period was 1122.8 ft. m.s.l. on 17 August. Inflows and uncontrolled outflows uere h:termittent throughout the period. The maximum daily average inflow was 218 c.f.s. on 17 August. The outflm-1 on this date was 63 c.f.s. The max:iraum daily average outflo•,l \vas 77 c.f.s. on 18 August. No flood control was achieved during the period. STANDING BEAR DAM MID LA..TZE SITE NO. 16 - PAPILLHJN CREEK :BASIN, NEBRASKA 1980-1981 REGULATION

1130 1130 . _J TOP OF FLOOD CONTROL ZONE C/) . 1120 120 ~ w > 0 1110 '1110 tD < ~BASE OF FLOOD CONTRO L ZONE t- UJ UJ 11DO 100 lL -z z 1090 090 0 t-- ~ UJ 1080 _J 080 liJ

7J 72 73 74 75 76 77 78 7 9 8 ') ASOND JFMAMJ J YEARS 1980 1981

The maximum pool level achieved during ti1.e period 'vas 1105.4 ft. m.s.l. on 17 August. Inflmvs were intermittent throughout the year. The pool level was in the flood control zone briefly during the beginning of tile reporting period. The maximum daily average inflow was 123 c.f.s. on 11 August. The outflow 0:::1 this date >vas 6 c.f.s. The maximum daily average outflow was 24 c.f.s. on 18 August. No flood control was achieved during the period. PIPESTEM DA..'1 AND LAKE PIPESTEM CREEK - JA~ms RIVER BASIN, HORTH DA..TZOTA 198 0-1981 REGULATIOH

1470 1470

...J Cl) . 1460 1460 ~ w > 0 1450 1450 Ill <( ..... UJ w 1440 1440 u. BASE OF FLOOD CONTROL ZONE z z 1430 1430 0 ..... ~ UJ ...J liJ

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 1981

At the beginning of the period, inflovlS and outflows were negligible as the pool level at Pipestem Lake fluctuated slightly above the base of the flood control zone. Early fall rains caused the pool level to rise slightly into the flood pool late in August. These rain~ and return flo\vs were sufficient to sustain a minimal outflow through the winter months. The drought conditions of the previous year continued U1rough this period A deficient snowpack and much below average spring precipitation produced only a minimal rise into the flood pool in the spring. The pool again declined so that the period ended once again \vith inflo\vs and outflows near zero. The maximum pool recorded during the period was 1443.48 ft. m. s .1. from 27 February through 1 March. The maximum daily average inflow \vas approximately 160 c.f.s. on 26 February. Tl1e outflow on til.at date was approximately 60 c.f.s. The maximum daily outflm-1 \vas approximately 100 c.f.s. on 28 February and 1 Harch. No flood control was achieved during the period. OLIVE CRE~I( D,:\ ...'1 MID LAKE SALT CREEK 11ASin - NO. 2, ~1EBR:\SK.'\ 1980-1981 REGULATIOn

...J (/). ::2 w > TOP OF FLOOD CONTROL ZONE 0 al ...<( UJ w 134 BASE OF FLOOD CONTROL ZONE u. z z 133f 1330 ...0 ~ UJ 132 1320 ...J 1IJ

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 1981

The l.::.ke level remained below the top of the cc:1serv'ltion pool cbring ti-le entire year. Inflows wer2 inten:dttent or negligible tbrougho•Jt the year. The maxinmm pool level w:1s 1333.8 ft. m.s.L on 15 August. The peak daily .sve-rage infloT.v vJa.s 13 ~.f.s. on 15 August. There was no outflovJ during the year. No flood control was achieve

..J. CJ) . 1330 331) ~ TOP OF FLOOD CONTROL ZONE w > 0 1320 320 co <( r- BASE OF FLOOD CONTROL ZONE LaJ 1310 310 ""LL. z

z 1300 l3GO 0 r- ~ liJ 1290 129!} ..J l&J

7J 72 73 74 75 76 77 78 79 80 ASOND JFMAMJ J YEARS 1980 1981

The lake level. remai::~ed helc·w the tc•p of the conservat ior: pool duri:-.g the entire year. Inflov:s vlcre interm.~ttent or negUs:; ible througho:;t tl--..e ysar. The. maxim~m pc•ol levsl w;;.s 1306.2 ft. m.s.l. on 1 Augus:::. The peak daily aver-:1se inflow ~-~as 16 c.f.s. o~ C) A.Jgust. There 'iv:Js no out:flo-vJ duri~"cg t::.e year. 1'Jo flo'-•d control ~·Jas 2-chiev~d during this period. HAGDrT TRAin DA:1 A...~D LAKS SALT CREEK BASDT NO. 8, NEBRASKA 1980-1981 REGULATION

. ..J CJ) . 1310 11310 ~ w TOP OF FLOOD CONTROL ZONE > 0 CD 1300 1300 < r- BASE OF FLOOD CONTROL ZONE l1J ' w 1290 1290 u. -z z 1280 1280 0 r-- ~ l1J 1270 1270 ..J LIJ

7J 72 73 74 75 76 77 78 7 9 8 0 A S 0 N D J F M A M J J YEARS 1980 1981

The lake level remained belm..1 the top of the co::1servation pool during the entire year. Inflows v1ere intermittent or negligible throughout ti1e year. The maximum pool level reached was 1287.3 ft. m.s.l. 0:1 16 August. The pea~: daily average inflovi was 85 c.f.s. on 16 August. Tl-lere vlas no outflow during the year. ::To flood control was achieved during this period. STAGECOACE DAN ADD LAKE SALT CREEK BASI:~ - no. 9, NEBRASKA 1930-1981 REGULATIO~I

..J (/) . 1300 .3 00 ~ w > 0 1290 21?0 co TOP OF FLOOD CONTROL ZONE < .... UJ w .1280 230 u. BASE OF FLOOD CONTROL ZONE z z 1270 270 0 .... ~ UJ 1260 1260 ..J liJ

7J 72 73 74 75 76 77 78 79 80 ASOND JFMAMJ J YEARS 1980 1981

The lake level remained below the top of the conservation pool during t~e entire year. Inflows \Jere intermittent or negligible tlu-oughout t'he year. The maximum pool level was 1271.1 ft. m.s.l. on 16 August. The peak daily average i:1flou vlas t,~. c.f.s. on 16 August. T'here vJas no outflo>·7 during the year. no flood control was achieved duri:1g this period. YANKEE HILL DAH AJ:1D LA.'ZE SALT CRE:SK BAS nT - }:10. l 0, NZBRASKA 1980;,..1981 RECULATIOH

..J (/) . 127 0 270 ~

LLJ TOP OF FLOOD CONTROL ZONE > 0 1260 2SO al <( 1- UJ BASE OF FLOOD CONTROL ZONE LLJ 1250 250 LL z z 12/i 0 240 0 1- ~ UJ 1230 23C ..J LIJ

7J 72 73 74 75 76 77 78 7 9 80 A S 0 N D J F M A M J J YEARS 1980 1981

The lake level remained below tl1e top of the conservation pool during t~e entire year. Inflows were intermittent or neg::.iglble t:~oughout the :rear. Ti-le ma:d.n:.a:~. pool :evcl ~vas 1242.6 ft. m.s.l. on 16 August. Th2 peal: daily average inflow was 1': c.f.s. on lG August. There was no outflo~v during the year. no flood control ~vas ach.ieved duriag t :~.is period. CONESTOGA DAM AND LAKE SALT CREEK BASIN - UO. 12, NEBRASKA 198 0-1931 REGULATI Oil

1. ...J. (/) . 1260 1260 ~ w TOP OF FLOOD CONTROL ZONE > 0 1250 CD 1250 < 1- UJ L&J 1240 1240 u.. .BASE OF FLOOD CONTROL ZONE :z z 1230 1230 0 1- ~ UJ 1220 1220 ...J l&J

7J 72 73 74 75 76 77 78 79 80 A S 0 N n J F M A M J J YEAP.S 1980 1981

The pool level at Conestoga Lake remai:l.ed belm-1 the base of the flood control zone during the entire report'ing period. Deficient snowfall and inadequate rains accounted for a below average total precipitation for the year. InflovJ •vas intermittent or negligible for most of the year. The maximum pool level reached was l232.2 on 16-20 August. The maximum daily average inflow was approximately 17 c .f. s. recorded on 16 August and 15 May. There >vas no outflow dur i:1g the year. ~Jo flood control was achieved during the period. T.HN LAKES DA.'1 AND LAK.:S SALT CREEK :BASIN- NO. 13, NEBRASKA 193 0-1931 REGULATI 0:1

...J (f) . 1360 1360 ~ TOP OF FLOOD CONTROL ZONE w > 0 1350 1350 al <( .,_ BAS E OF FLOOD CONTROL ZONE I UJ w 1340 1340 u. z z 1330 1330 .,_0 ~ UJ 1320 1320 _J l&J l,.l_

7J 72 73 74 75 76 77 78 7 9 80 ASOND JFMAMJ J YEARS 1980 1981

The pool level at Twin Lakes remained below the base of the flood control zone during the entire reporting period. Deficient snowfall and inadequate rains accounted for a below average total precipitation for the year. Inflow was intermittent or negligible for most of the year. The maximum pool level reached ~1as 1337.7 on 15-17, 20, 21 August. The maxi1num daily average inflow was approximately 27 c. f. s. recorded on 3 April. There was no outflo~J during the year. l"!o flood control was achieved during the period. PAVJNEE DAH Ar:D LAKE SALT CREEK BASIN - NO. 14, NEBRASKA 1~80-1981 REGULATION

..J. til . 1270 127 0 ~ TOP OF FLOO D CONTROL ZONE w > 0 1260 1260 co <( .... UJ w 1250 1250 LL BASE OF FLOOD CONTROL ZONE z z 1240 1240 0 ....- ~ UJ 1230 ..J 1230 UJ

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 1981

The pool level at Pawnee Lake remained belmv t:1e oase of the flood control zone during the entire period except for a brief period in Hay when the maximum pool elevation of 1244.3 ft. m.s.l. ,.,as recorded on 18-29 May. Deficient snm·Jfall and inadequate rain in the accounted for below average total precipitation for the year. Inflow was intermittent or negligible for most of t~e year. The maximum daily average inflow was approximately 60 c.f.s. on 18 Hay. There was no outflow on that date. The only outflow recorded during the period vms approxi.'Tlately 1 c.f.s. on 21 and 22 May. No flood control was achieved during the period. ANTELOPE CRZEK DAH ANJJ LA.K.S SALT CREEK BASIN NO. J.7, NEBRASL'\ 1980-1981 REGULATIO~T

..J. (/) . 1270 1270 ~ TOP OF FLOOD CONTROL ZONE w > 0 1260 tO 1260 < 1- UJ w 1250 1250 u. z BASE OF FLOOD CONTROL ZONE z 1240 1240 0 f- ~ UJ 1230 1230 ...J 1IJ

7J 72 73 74 75 76 77 78 7 9 8 'J A S 0 N D J F M A M J J YEARS 1980 1981

The highest pool level of 1242.6 ft. m.s.l. oc.curred on 16-1.8 August 1980. The largest daily av<:>ra;;e i~flow of 35 c.Ls. nccurred on 16 August. The outflow on that date "~<:'as 3 c. f. s, The daily '1verage pes.k outflow ~,Tas 6 c .f. s. on 17 A·.~ gust. The :;>ool level grad­ ua.lly drcppm dt!rir.g tre rmaindPr of th? reportint; pe:::-iod. I~flows 3nd outflocrs were zer:-: for mo.st of the perioo. No flcod control was achieyed during the period. BRANCRED OAK DAM A.~"'D LAKE SALT CREEK EASIN NO. 18, NEBRASKA 193 0-1931 REGULATI m~

...J. C/) . 1290 290 ~ BASE OF FLOOD CONTROL ZONE w > 0 280 al 1280 <( 1- UJ LLJ 1270 1270 LL z z 1260 0 1260 1- ~ UJ 1250 1250 ..J LIJ

7J 72 73 74 75 76 77 78 7 9 8 ') A S 0 N D J F M A M J J YEARS 1980 1981

The lake level fluctuated from just belm.; to just a'oove t::.e base of the flood control zone throughout the entire period. The maximum pool level reached during the period was 1285.2 ft. m.s.l. on 19 October 1980. Tl:e largest daily average b.flow was 1358 c.f.s. on 16 October. The peak daily average outfloH of :!.17 c.f.s. occurred on 19 October. Inflows and uncontrolled outflows were intermittent ti~oughout the period. Gated releases of 3 c.f. s. \vere made from 22 Ju:1e t~-:rough 31 July 1981. Tl"lese releases >vere made to satisfy downstream water right requests. l1o flood control vms achieved during the period. s:-;rAK.E CREEK DAM AND LAKE AUDUBOn LAKE SAKAKAW3A SU:SL'1POmiDME~1T MISSOURI RIVER BASIN, NORTH D~~OTA 198 0-1981 REGULATI0~1

~~IWJM NORMAL OPERATING POOL 1850 ; -·850 ..J. ~ii'i'ii~~~ii~~iiiiiiiiiiii~lllllllllllll CJ) . 1845 845 ~ w > 0 1840 840 al < ~ UJ w 1835 835 LL :z

z 1830 830 0 ~ ~ UJ 1825 825 ..J 1&J

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 19E.l

The maximum poollevelachievedduring the period was 1848.10 ft. m.s.l. on 23 October 198(. Reservoir losses gradually lowered the lake to the minimum pool elevation of 1847.36 ft. m.s.l. on 1 January 1981. There \vere no diversions from the lake during this period. The plan of operation is to maintain the lake at an elevation of 1848 ft. m.s.l., or slightly belovi, until the diversion of water by the Garrison Diversion Unit becomes operational. On 2-4 June 1981, the Bureau pumped 3,570 acre-feet of water from Lake SakakaHea into Lake Audubon for fish and vlildlife purposes. If the Garrison Diversion Unit becomes operational the lake will probably be raised to its normal operating level of 1850 ft. m.s.l.

------rn:::~r~·-~ ... ._. '~""-·· ·~ ..._,._ SPRING CREEK DAM AND LAKE POCASSE LAKE OA!-!E SUB IHPOUNDHENT MISSOURI RIVER BASH!, SOUTE DAKOTA 1980-1981 REGULATION

...J. CJ). TOP OF DAH ~ w > 0 620 Ill <( SPILLWAY CREST 1- UJ w 1615 615 LL. z z 1610 610 0 1- ~ LLI 1605 605 ...J L&J

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEP,.RS 1980 1981

The lake remained belm.;r the spillway crest for the second year. The lake reached its lowest level on 11 July 1981 when an elevation of 1612.45 ft. m.s.l. was acaieved. The highest pool elevation of 1616.00 occurred on 20 July 1981. The normal plan of regulatio is to maintain the pool as high as possible for fish and wildlife purposes. If a pool elevation above 1614.0 ft. is sustained for long periods of time, the lake would be drawn down below this level in early summer to re-establish shoreline vegetation and provide an opportunity for an increased water exchange rate. BOYSEN DAH Al'-i'D LA..tzE BIGHORrl RIVI:R BASIN, WYOMING 1980-1981 REGULATION

TOP OF FLOOD CONTROL ZONE

....J 4730 4730 . TOP OF JOINT US E ZONE Cl). ~ I BASE OF JOIN T USE ZONE w 4720 }720 > 0 al < 4710 710 ~ UJ w lL z 470 4700 z 0 .... 469 4690 ~ UJ ....J LaJ 468 4630

7J 72 73 74 75 76 77 78 7 9 8') A S 0 N D J F M A M J J YEARS 1980 1981

The Boysen Reservoir pool elevation vm.s Hell below the top of the conservation zone at the beginning of the reporting period uith releases reduced early in this period. The releases were further reduced from 1,400 c.f.s. to 1,100 c.f.s. in early October. Pre­ cipitation during the winter months was 68-70 percent of normal >vith above noc:nal te.'!lpera tures. The October through June precipitation of 6.85 inches >Ja.S S2 percent of the average. The pool level stayed near the base of joint use until late May and then began to rise. The maximum pool elevation reached was 4722.':J7 ft. m.s.l. on 6 July 1981. The maximum inflovJ was 10,875 c.f.s. on 10 June 1S81. The outflmv on tt.at date \vas 2,033 c.f.s. The maximum outflot.v was 2,042 c.f.s. on 19 June 1981. Do·..mstream flooding was prevented. CA:t-JYml FERRY DA..."f AND RESERVOIR HISSOURI RP!ER BASn;, MONTANA 19'3 0-1981 REGUL'\.T I 0:1

..J. (/) ~TOP OF FLOOD CONTROL ZONE . 3800 £00 ~ TOP OF JOTNT USE ZONE. w > 0 37 9L' :H90 al <( ..,_ UJ w 378 () u.. BASE OF REPLACEMENT Z0:1E z _ll BASE OF FLOOD CONTROL ZONE z 3770 770 0 ..,_ ~ 11.1 3760 7 60 ..J liJ

7J 72 73 74 75 76 77 78 79 80 A ~ 0 N D J F M A M J J YEARS 1980 1981 During the winter months snowfall 1:vas below, nor:nal nver most o£ tlv:- Missouri Riv-::r B.;::sin ~rilin2.ge. By 1 Ha~~, the snowpac~>: on -:r:ost arl:'·as of M0ntana ~ms 40 - 60 percect 0f average. :Jeavy and frequent rains late in Hay s.nd early Jcne ::-esorlt:::d i71 recor2 flcodc: in are<)S ~rour:d Deer Lodt:,e, Boz<:-ma!1, and Helena. Record inflows int:o C3nyon FP.rry Re8ervoir were also set in this period. A record 18 day infl~"'w of 507,000 A.F., 30 day inflmv ('f 1,337,313 A.F., and peak i:~st::mt:mecms :inflo1:v :"1f 30,8')0 c .. f.s. v1ere

TOP OF FLOOD CONTROL ZONE ...J. 5560 C/). ~ TOP OF REPLACEMENT ZONE w 5550 I ' 550 > TOP OF JOINT USE ZONE 0co < 5540 540 r­ UJ w u. BASE OF F):i OD CONTROL ZONE z 5530 530 z - 0 r- 5520 520 .~ UJ ...J LIJ ... . 5:5lQ 510

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 1981

Releases from Clark Canyon Reservoir were regulated during August and September, as neededJ to meet irrigation demands. Reservoir storage was drawn to 140,603 acre-feet at elevatior 5538.52 ft.,m.s.l. on 6 September. Early in the period, many of the snm·l courses in :i'Iontana Here at or near the lowest amount of water equivalent for the period of record. On 1 February the water content in the Beaverhead River drainage area was about 59 percent of average. In the interest of conservation, releases \vere kept at a minimum to fill t~e joint use zone of the reservoir. Heavy rains early in :May brought the total precipitatio value above average. As storage continued to climb into the flood zone, flood control releases of approximately 200 c.£. s. v1ere ordered by the Corps of Engineers on 1 Hay. The release was ordered increased to 800 c.£. s. on 26 May to slow the rate of pool rise. The release rate was limited to this rate to \vith~old water from the downstream Canyon Ferry Reservoir which was near its full storage capacity level. The maximum pool reached during the period was 5550.78 ft. m.s.l. on 11 June (75,000 A.F. of 129,000 A.F. of the Flood and Joint Use Storage Zone was utilized or 58 percent). T~e peak daily inflow was 1,550 c.f.s. on 2 June. The outflow on this date was 800 c.f.s. The peak daily outflow was 1,050 c.f.s. on 24, 25 July. Downstream flooding was prevented during this period. GLENDO DM1 MID RESERVOIR NORTH PLATTE RIVER BASIN, HYOHilJG 1980-1981 REGULATION

4660 TOP OF FLOOD CONTROL ZONE 4660 ..J. en BASE 0 F FLOOD CONTROL ZONE . 4640 640 ~ w > 0 4620 14 620 al <(

~ UJ w 4600 lt. 600 u.. z

z 4580 I 580 0

~ ~ UJ 4560 560 ...J LaJ

7J 72 73 74 75 76 77 78 79 80 ASOND JFMAMJ J YEARS 1980 1981

Jormal conservation regulation for Glendo resulted in the annual pool dra\vdown in late summer and a pool rise during the fall and winter. Hountain snowmelt runoff forecasts into Glendo were much below average for this period. Eowever, heavy rainfall early in 1ay delayed irrigation releases and in the interest of conservation, the pool level was permitted to encroach briefly into the flood control zone. The pool level exceeded the j:Jase of flood control on 22 Hay 1981 and was in the Flood Control Zone until 14 June 1981. ~he maximum pool level was 4637.07 ft. m.s.l. which occurred on 1 June 1981 (26,190 A.F. pf 271,920 A.F. of flood storage space was utilized or 9.6 percent). The maximum daily ~nflow was 2,950 c.f.s. on 15 August 1980. The outflow on this date was 30 c.f.s. The ~aximum daily outflow was 7,450 c.f.s. on 31 July 1931. This release was made for irriga- ·ion purposes. The minimum pool was 4571.40 ft. r:J..s.l. on 24 September 1980. Minor ownstream flooding was prevented. HEART BUTTE DAM AliD LAKE (L&~~ TSCHIDA) HEART RIVER BASIN, {10RTH D&TZOTA 198 0-1981 REGULATION

2100__ _ -·2100 ~LOOD CONTROL ZONE ..J

2090

w 11111111 > 0 al < .... UJ w 207 u. BASE OF FLOOD COI'JTROL ZOJ'TE) z z 206l 2060 0 .... ~ LLI 2050 2050 ..J LIJ

7J 72 73 74 7 5 76 77 78 79 A S 0 N D JFMAMJ J YEARS 1980 1981

The dry summer and fall followed by a winter of scant snowfall were similar to the previous year in the I-leart River Basin. Soil moisture, ground, and surface water supplies were further depleted. The maximum pool elevation, 2061.54 ft. m. s.l., occurred on 1 August 1980. During the reporting period, the conservation pool was not filled. The maximum daily inflow Has approximately 400 c .f. s. on 17 October 1980. Outflow on this date 'iJas 10 c .f. s. The heaviest precipitation occurred in October when 2.95 inches was recorded. The maximum daily outflo"t-J >vas the irrigation release of 105 c.f.s. from 2 to 10 August 1980. No flood control >vas achieved during the period. JANESTOmT DA~1 AND LAKE JAMES RIVER BASIN NORTH DAKOTA 198 0-1981 REGULATION

'"T '

TOP OF FLOOD CONT ROL ZONE _J

(/) . 1450 450 ~ w > co0 1440 440 <( - TOP OF JOINT USE ZONE f- UJ w 1430 430 u.

z ~BASE OF FLOOD CONTROL ZONE z 1420 420 0 f- ~ LIJ _J LIJ

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 1981

On 10 September, a release of 100 c.f.s. vias initated to evacuate ~vater from the joint use storage zone from Jamestown Reservoir. Releases were gradually reduced to prolong a live streamflow below the dam. The evacuation v7as essentially complete,· by mid­ November. A release of 20 c.f.s. vias continued, as determined by the Bureau of Reclama­ tion: until 26 December when the outlet works was closed. The absence of a significant winter snowpack and below average precipitation this period resulted in only the fill of the joint use zone and a minute encroachment into the exclusive flood storage zone. The pool was in the exclusive zone from 1 April until 30 July. A release of 50 c.f.s. was made on 11, 12 and 13 July in an attempt to ward off stagnation of the James River in the City of Jamestown. The maximum pool achieved during the period was 1433.26 ft. m.s.l. on 2 June (8,200 AF of 192,100 AF of flood storage space was utilized or 4 per­ cent). The maximum daily average inflow was 100 c.f.s. on 17 March. Outflow on this data wrs zero. The maximum outflow \·Jas 100 c.f.s. made from 10 to 23 September. No flood control was achieved during the period. KEYHOLE DAM At"'D LAKE BELLE FOURCHE RIV~R BASI~J, 't-TYOMING 1980-1981 REGULATION

4120 4120

...I ZONE (/) TOP OF FLOOD CONTROL 4110 4110 ~ w > BASE OF FLOOD CONTROL ZONE 0 4100 I 4100 al < ..... UJ w 4090 4090 LL z z 4080 I I 080 0 ..... ~ UJ 4070 '~070 ...I L&J

7J 72 73 74 75 76 77 78 7 9 8 'J A S 0 N D J F M A M J J YEARS 1980 1981

Keyhole Reservoir recorded its highest pool elevation at the begi:ming of the reporting period, 4090.07 ft. m.s.l.,on 1 August 1980. Due to the deficient snoHpack a:1d drought conditions, the pool level declined t~rough the period. The pool level of 4074.78 feet on 24 July 1981 \vas the lo-v;est pool since 1962. Irrigation releases were i:1itiated 13 April and continued until 10 Septem~)er 1981. The Belle Fourc:1e Irrigation ::Jistrict co~tracted for the delivery of an additio:1al 57,000 A.F. of uater to be stored in its reservoir on Oul Creek, S. D. (Belle Fourche Reservoir). The pool level of this ::J:i,.versior Dam \vas low. This delivery •vas in add it ion to the approximately 10,080 A.F. ordinarily delivered to -v1ater users for use by tl1e Irrigation ::Jistrict. Tl1e maximum release was approximately 313 c.f.s. during the irrigation season. During the period, there vJere some periods of zero inflow. The maximum daily inflmv ~;.;ras approximately 1,230 c.f.s. on 28 July following a heavy rain. ~Jo release was made on that date. No flood control was achieved during this period • PACTOLA DAH AND RESERVOIR RAPID CR"SEK BASIN, SOUT"!":I DAKOTA 1980-1981 REGULATIOn

TOP OF FLOOD CONTROL ZONE

..J. Cl). ~

UJ > BASE OF FLOOD CONTROL ZONE 0 4680 680 al <( 1- UJ UJ 4560 560 u. z z 4540 0 1- ~ UJ ..J l&J

7] 72 73 74 75 76 77 78 79 80 ASOND JFMAMJ J YEARS 1980 1981

The elevation of Pactola Reservoir changed o~ly slightly during the reporting period. During the winter, snowfall accumulation 1:vas less than 40 percer..t of normal resulting in low inflows during the spring. This lac~<. of c"hange v1as also due to hig:1 irrigation demands from downstream users and hig:1 evaporation rates acco:npanied by low inflous during the summer. The maxL:num pool elevation was 4571.24 ft. m.s.l. on 22 April. The maximum daily inflow was 140 c.f.s. on 17 Hay ,.,~en 4.24 inches of rainfall occurred from 16-18 May. The outflm-1 on that date was 56 c. f. s. The r:~axirnur:1 daily outflow T.vas 144 c.f .s. on 2 May. Approximately 2,000 acre-feet of water v1as moved from Deerfield Reservoir to Pactola beginning on 29 July to de:ay the drop in the declining pool level. No flood control was achieved during the period. SHADEHILL DAM AND RESERVOIR Gr-AND RIVER BASin, SOUTH DM:OTA 198 0-1981 REGULAT I O~I

.Ill . TOP OF FLOOD CONTROL ZONE ..J. 2300 JOC Cl). ~ 2290 229C w .. > - 0 al <( 2280 228( 1- UJ ~. BASE OF FLOOD CONT ROL ZONE. w u. z 227 2270 z 0 f- :26 2260 ~ UJ ..J LLI 225 225C

Fer tl:e sf:>cond yc:>ar in a :-ovJ~ runoff into S~dr~hill Reservo:.r >vas belol-J 50 ;:;ercent of :::tve!'age. At t~1e beginning of thiE' reporting period, i""!flow into Shadehill had dropped to zero. CClntinucd lnvl fJ.ows, evapc-ration and irrig<'ltion releases resulted in the continu5_ng decline of ti.1e storage pool. Ry the end of September 1980, releases >-Jere reduced to BIGHORN LAKE BIGHORN RIVER BASIN, MotiTANA 1980-1981 REGULATION

TOP OF FLOOD CO NTROL ZONE 3660 3560 ..J. TOP OF JOINT US E ZONE C/) . 3640 3640 ~ w > 0 3620 3620 Ill < .... UJ UJ 3600 3600 IL. z l"" BASE OF JOT NT USE ZONE z 3580 3 58 0 0 .... ~ LIJ 3560 3560 ..J 1IJ

7J 72 73 74 75 76 77 78 79 80 A S 0 N D J F M A M J J YEARS 1980 1981 At the beginning of the period inflov;s ';vere 120 percent of nor:nal into Big"!lorn Lake as rainfall increased in August and September. Reservoir releases were increased to 4, 000 c.f.s. on ll:. September and continued at that rate througn the end of Septenber. Later, the \vater supply outlook indicated all neadwater areas in the :Sig:1orn River basin lo have below average snowpack, 40 to SO percent of average. The pea~~ snowmelt was also predict­ ed to be two vJeel:s to a mont:1 early. Early in ~1ay, warm temperatures and rainfall, with totals over 9 inc :1es for tne\mont~1 of Hay at several reporting stat ions, caused the pool at YellovJtail Dam to rise into tl.1e exclusive flood storage zone on 12 June. Storage in this zone was permitted intermittently through 5 July while river stages downstream con­ tinued to drop, thereby conserving storage for po\ver generation. As the pool rose at Yello\Vtail, the runoff into the Shoshone River above Zuffalo 3ill Reservoir caused that pool to rise above the spillway on 30 May. The pool level of t~t reservoir remained above the spillway crest until 18 July. The maximum daily average inflow was 22,164 cfs on 9 June and t:1e maximum daily average outflow \·Jas 14,715 cfs on 10 June at Buffalo :3ill Reservoir. The maximum pool level achieved at 3ighorn La~e during the period was 361+1.07 ft. m.s.l. on 38 June (13,847 A.F. of the 259,000 A.F. of the exclusive flood control zone was utilized or 5 percent). The maximum daily average inflow v1as 19,000 c.f.s. on 10 June. The average outflow on that date was 8,110 cfs. The maxL~um daily average outflmv was 9, 950 cfs on 13 June. Downstream flooding \vas reduced by Buffalo Bill Reservoir and vJaS also prevented by the regulation of Bigl1orn Lalze during t:1is reporting period.

'------·-~-·~-- ·--··-··-· OCTOBER 1981

OMAHA DISTRICT RESERVOIR REGULATION MANUAL AND REPORTS

NEXT SCHEDULED DATE APPROVED SUB. DATE PROJECT CORPS OF ENGINEERS MISSOURI RIVER DAMS-I FORT PECK Oct 1976 (F) !) GARRISON Aug 1978 (F) 2/ OAHE Sep 1978 (F) 2; BIG BEND Dec 1978 (F) 2; FORT RANDALL Feb 1979 (F) 2; GAVINS POINT Mar 1979 (F) J) CORPS OF ENGINEERS TRIBUTARY DAMS-I CHATFIELD Jan 1973 (P) Dec 1982 (F) CHERRY CREEK Oct 1971 (F) Dec 1983 (UD) PIPESTEM Jul 1975 (P) '}_/ BEAR CREEK Jan 1978 (P) Mar 1983 (F) BUREAU OF RECLAMATION DAMS-I BOYSEN Dec 1966 (F) Mar 1984 (UD) CANYON FERRY Mar 1972 (P) Mar 1983 (F) CLARK CANYON Aug 1976 (F) 11 GLENDO Apr 1970 (P) Dec 1982 (F) JAMESTOWN Nov 1957 (F) Oct 1983 (UD) PACTOLA Feb 1977 (F) 11 TIBER J) Jun 1983 (UD) YELLOWTAIL Jan 1974 (F) !) CORPS OF ENGINEERS TRIBUTARY DAMS-II BOWMAN-HALEY Jan 1968 (P) Jun 1982 (F) CEDAR CANYON Jan 1971 (F) ];./ COLD BROOK Aug 1954 (F) Apr 1983 (UD) COTTONWOOD SPRINGS Sep 1973 (F) ']) KELLY ROAD Jan 1971 (F) Dec 1982 (UD) PAPILLION CREEK Apr 1982 (F) SALT CREEK Dec 1978 (F) ll BUREAU OF RECLAMATION DAMS- II HEART BUTTE Feb 1951 (F) Jun 1984 (UD) KEYHOLE Jun 1969 (F) 11 SHADEHILL Nov 1951 (F) Jan 1984 (UD)

NOTES I - DAMS REQUIRING REGULATION II - DAMS HAVING PRIMARILY F.C. REGULA1ION (P) PRELIMINARY MANUAL OR REPORT (F) FINAL MANUAL OR REPORT (UD) UPDATE 1/ UNDER CONSTRUCTICN (REHABILITATION) l/ TO BE REVISED WHEN NECESSARY TO CONFORM WITH CHANGING REQUIREMENTS RESULTING FROM PROGRESSIVE DEVELOPMENT IN PROJECT AREAS, IMPROVEMENTS IN BASIC TECHNIQUES OR OTHER RELEVANT FACTORS. (REF. PARAGRAPH 7C OF ER 1110-2-240, AND PARAGRAPH 16i, APPENDIX III OF ER 1110-2-24J DATED 22 APRIL 1970.) 1/ INFORMAL REQUESTED REVISIONS BEING MADE IN DISTRICT.

INCLOSURE 6 ~ Ex~cutive Office (District Engineer) f (Ex. err. Elements) (Engr. Divn. Branches) (Hydro. Engr. se'ctions ) Program Development ,__ f- Autorr.atic Data Processing Design r-- Channel Stabilization

- Comptroller ~ Foundation and Haterials.. ~ Hydraulic

f-- Construction Division f- Hydro:Log~c Engineering llyd ro-He te orology ..__ ~ . £ngincerinp; Divi~ion ·Hilitft:r.y Water Qual & Sediment ..__ - Office of Council - Honito·ring and E~aluation Reservoir Regulation 1-- Office of Administrative Services --- . Service. . f- Operations Division ·- Personnel - Planning Division - Public Affairs - - Real Estate - Safety - Security .._ Procurement and Supply Division Area Engineers

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ORGANIZATION CHART OMAHA DISTRICT