Summary of TMDL Approvals in Colorado Number of 303(d)(1) TMDL’s approved: 293
APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
Ryan Gulch Zn X HP Company 11/12/96 (Trib to Big Loveland Thompson) CO0044300 COSPBT04
South Platte River TRC X Excel Corp. “ (Seg 2/ ammonia X Ft. Morgan L. S. Platte River) CO0044270 COSPLS02
Dry Creek Cr III X American Atlas #1 LTD “ (Seg 4/ Cr VI X CO0042447 L. Colorado River) COLCLC04
Wetlands Trib to Fecal Coli X Aspen Glen W & S District “ Roaring Fork River TRC X CO0044750 COUCRF03 Ammonia X
Leyden Creek ammonia X Public Service Co. of Colorado; 12/03/96 (Seg 18a/Clear boron X Leyden Gas Storage Plant Creek/S. Platte) chloride X CO0001279 (Listed as "Barbara TRC X Gulch" on 1996 303(d) cyanide X list) fecal coli X fluoride X COSPCL18A nitrate X nitrite X sulfate X sulfide X antimony X arsenic X barium X beryllium X cadmium X chromium (tri) X chromium (hex) X copper X iron X lead X manganese X mercury X
Leyden Creek cont. nickel X Public Service Co. of Colorado; 12/03/96 radium 226+228 X Leyden Gas Storage Plant selenium X CO0001279 silver X thallium X uranium X zinc X
Cripple Creek* Mn X Cripple Creek & Victor Gold Mining 12/11/96 COARUA21 Cd X Company CO0024562 Cu X Pb X Zn X Hg X
updated 08/28/00 Page 1 of 14 APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
South Platte River* fecal Coli X Lockheed Martin 12/11/96 COSPUS06L2 TRC X CO0001511 ammonia X Roxborough nitrite X Park As X (only fecal Cd X coli, ammonia, TRC, P) Cr(III) X CO0022942 Cr(VI) X CO0041645 Cu X CN X Fe X Pb X Mn X Hg X Ni X Se X Ag X Zn X phosphorus X
Lightner Creek* fecal coli X Joe & Cheryl Amorelli 12/11/96 COSJAF14 TRC X CO0026468 ammonia X
Clear Creek* ammonia X City of 12/11/96 COSPCL11 fecal coli X Idaho Springs TRC X CO0041068 Cu X Pb X Hg X Ag X
Sand Creek* benzene X Chase Terminal Co. 12/11/96 COSPUS16 CO0043052 Conoco, Inc. South Platte CO0001147 River* Colorado Refining Co. COSPUS15 CO0001210 Phillips Pertroleum Co. CO0043362 Diamond Shamrock CO0043842 Chemical Sales Co.
Wetlands Trib to fecal coli X Aspen Glen W&S 12/11/96 Roaring Fork River** TRC X District COUCRF03 ammonia X CO0044750
West Fork of Clear cadmium X Climax Molybdenum 02/03/97 Creek* manganese X CO0041467 (Seg. 7) zinc X COSPCL07 chromium VI X copper X Woods Creek* iron X (Seg. 5) lead X COSPCL05 mercury X nickel X silver X chromium III X uranium X TRC X
updated 08/28/00 Page 2 of 14 APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
Troublesome Creek** cyanide X West Jefferson County Metro Dist. 02/03/97 (Seg. 5) TRC X CO0020915 ammonia X COSPBE05 arsenic X cadmium X chromium III X chromium VI X copper X iron X lead X manganese X mercury X nickel X selenium X silver X zinc X fecal coli X
Bear Creek* fecal coli X Evergreen Metro Dist. 02/03/97 (Seg. 1a) TRC X CO0031429 ammonia X Kittredge San. and Water Dist. COSPBE01A mercury X CO0023841 arsenic X Genessee Water and San. Dist. cadmium X CO0022951 chromium III X West Jefferson County Metro Dist. chromium VI X CO0020915 copper X iron X lead X manganese X mercury X nickel X selenium X silver X zinc X cyanide X
Arkansas River fecal coli X Salida 02/03/97 (Seg. 3) TRC X CO0040339 ammonia X COARUA03 cyanide X mercury X nickel X selenium X silver X zinc X
South Platte River fecal coli X Sterling 02/03/97 (Seg. 1/ TRC X CO0026247 Lower S. Platte) cyanide X ammonia X COSPLS01 arsenic X cadmium X chromium III X chromium VI X copper X iron X lead X manganese X mercury X nickel X selenium X silver X zinc X
Boulder Creek* manganese X Boulder 02/03/97 (Seg. 9) CO0024147 COSPBO09
updated 08/28/00 Page 3 of 14 APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
South Platte River fecal coli X Sterling 02/06/97 (Seg. 1/Lower S. TRC X CO0026247 Platte)* cyanide X ammonia X COSPLS01 mercury X nickel X selenium X silver X zinc X arsenic X cadmium X chromium III X chromium VI X copper X iron X lead X manganese X
Arkansas River fecal coli X Salida 02/06/97 (Seg. 3) TRC X CO0040339 ammonia X COARUA03 cyanide X mercury X nickel X selenium X silver X zinc X arsenic X cadmium X chromium III X chromium VI X copper X iron X lead X
Clear Creek* fecal coli X CDOT Eisenhower 04/02/97 (Seg. 1) TRC X Tunnel CO0026069 COSPCL01 ammonia X
West Fork of Clear fecal coli X Town of Empire 04/02/97 Creek* TRC X WWTF CO0020575 (Seg. 5) ammonia X COSPCL05
Fountain Creek Chromium (TR) X Martin 05/06/97 (Seg. 2) Copper (PD) X Drake Power Iron(TR) X Plant COARFO02 Iron (PD) X CO0000850 Zinc (PD) X TRC X
Turkey Creek* TRC X Tiny Town 05/06/97 (Seg. 5) ammonia X CO0036129 COSPUS05 fecal coli X
updated 08/28/00 Page 4 of 14 APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
Unnamed Tributary of Arsenic(TR) X Bradley Environmental Services 05/06/97 Coal Creek Cadmium(PD) X CO0045039 (Seg. 15 and 16) Chrom. III(TR) X Chrom.VI (Total) X
COSPUS16 Copper(PD) X Iron(TR) X Lead(PD) X Manganese(TR) X Mercury(Total) X Selenium(PD) X Zinc(PD) X Benzene X Trichloroethene X Tetrachloroethene X Naphthalene X Nitrate X Nitrite X Sulfate X
Fish Creek* Iron (TR) X Seneca Coal Company 06/02/97 (Seg. 13b of Yampa CO0000221 River) COUCYA13B
Little Thompson* TRC X Town of Johnstown 06/02/97 (Seg. 9 of Big ammonia X CO0021156 Thompson) fecal coli X COSPBT09
Cripple Creek* (Seg. Cadmium X Cresson Project (Cripple Creek & 07/31/97 21 of Upper Arkansas Copper X Victor Gold Mining Co) Sub-basin of Arkansas Iron X CO0045225 River) Lead X COARUA21 Zinc X
Cherry Creek* Fecal Coliform X City of Glendale WWTF 07/31/97 (Segment 3, Cherry TRC X CO0020095 Creek Sub-basin of Total Ammonia X the South Platte) Cyanide (WAD) X Total Mercury X COSPCH03 Arsenic X Cadmium X Chromium (tri) X Chromium (hex) X Copper X Iron X Lead X Manganese X Nickel X Selenium X Silver X Zinc X
Lake Fork of the TRC X Lake City WWTF 07/31/97 Gunnison River* Fecal Coliform X CO0040673 (Segment 30 of the Total Ammonia X Upper Gunnison River Sub-basin of the Gunnison and Lower Dolores River Basins) COGUUG30
updated 08/28/00 Page 5 of 14 APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
Monument Creek TRC X Tri-Lakes 07/31/97 (Segment 6 of Ammonia X WWTF Fountain Creek Sub- Fecal Coliform X CO0020435 basin of the Arkansas Cyanide(WAD) X River Basin) Arsenic X COARFO06 & 7 Cadmium X Chromium (tri) X Chromium (hex) X Copper X Iron X Lead X Manganese X Mercury X Nickel X Selenium X Silver X Zinc X
Clear Creek* TRC X Denver Water-Moffat Water 08/20/97 (Seg. 15); Lena Gulch Treatment Plant (Seg. 16); S. Boulder CO0020524 Diversion Conduit (Seg. 17) of Clear Creek Sub-basin COSPCL15,16 & 17
Crystal River* (Seg. 8 TRC X Redstone Water and Sanitation 08/20/97 or Roaring Fork) ammonia X District COUCRF08 fecal coli X CO0023922
Tenmile Creek* Ammonia X Climax Mine 09/30/97 (Seg. 13, Blue River Boron (Total) X (Outfall 001) Subbasin, Upper TRC X CO0000248 Colorado River Basin) Free Cyanide X Nitrite X COUCBL13 Sulfide X Arsenic (PD) X Cadmium (PD) X Chromium +3 X Chromium +6 X Copper (PD) X Iron (TR) X Lead (PD) X Manganese (TR) X Mercury (Total) X Nickel (PD) X Selenium (PD) X Silver (PD) X Zinc (PD) X
Michigan River (Seg 5, Fecal Coliform X City of Walden WWTF 09/30/97 of North Platte Basin) TRC X CO0020788 COUCNP05 Total Ammonia X
Clear Creek*, TRC X Georgetown WWTF 09/30/97 (Segment 2 of Clear Fecal Coliform X CO0027961 Creek Sub-Basin of S. Total Ammonia X Platte River Basin) COSPCL02
Coon Trail Creek* Cadmium (PD) X Hendricks Mining Co.; 09/30/97 (Segment 3; Boulder Copper (PD) X Cross and Caribou Mines Creek) Lead (PD) X CO0032751 COSPBO03 Mercury (total) X Silver (PD) X Zinc (PD) X
South Platte River* Ammonia X Sterling WWTF 09/30/97 (Segment 1) CO0026247 COSPLS01
updated 08/28/00 Page 6 of 14 APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
Alamosa River* Arsenic X Miser Mine 11/05/97 (Segment 3b of Cadmium X CO0045101 Alamosa River/La Jara Trivalent Cr X Creek/Conejos River Hexavalent Cr X sub-basin of the Rio Lead X Grande River Basin) Manganese X Total Mercury X CORGRG03B Nickel X Silver X
South Platte* (Seg. 1a, Ammonia X West/Brandt Foundation; Singing 11/05/97 Bear Creek sub-basin) TRC X River Ranch (Discharge to Big Bear COSPBE1A Fecal Col. X Fish Pond No. 2) CO0035791
Coal Creek Iron (TR) X Powderhorn Coal Company 01/06/98 Seg.4 of L.Colorado CO0027146 River* (Seg. 2) COLCLC02
Arkansas River* Fecal Col. X Town of Fowler 01/06/98 (Segment 1) TRC X CO0021571 COARLA01 Ammonia X
North Fork Gunnison Iron (TR) X Mountain Coal Company (West Elk 01/06/98 River Coal Mine) (Seg. 2) CO0038776 COGUNF02 and Minnesota Creek (Seg. 5) COGUNF05
Trout Creek* Arsenic (TR) X Pittsburg and Midway Coal Mining 01/06/98 (Seg. 13c) Cadmium (PD) X Company (Edna Mine) Copper (PD) X CO0032638 COUCYA13C Lead (PD) X Silver (PD) X Zinc (PD) X Iron (TR & PD) X Nickel (PD) X Selenium (TR) X Sulfate (PD) X Manganese (PD) X Mercury (T) X
Eaton Draw Fecal Coliform X Eaton WWTF 01/06/98 (Segment 13) CO0023116 COSPCP13
South Platte River* Selenium (T) X Conoco, Inc. 01/06/98 (Segment 15) MTBE X (Co. Refining, Inc. & Metro Denver COSPUS15 included in TMDL) CO0001147
Little Thompson River* Ammonia X Riverglen Homeowners Association 01/06/98 (Segment 9) Fecal Coliform X CO0029742 COSPBT09 TRC X
Clear Creek* Iron (TR) X Western Mobile Denver, Inc. 01/06/98 (Segment 15) Manganese (D) X CO0001627 COSPCL15
San Juan River* TRC X Pagosa Springs WWTF 03/24/98 COSJSJ06A Fecal Coliform X CO00222845
Oxbow Lake, Seg. 6 of Fecal Coliform X St. Vrain WWTF 03/24/98 St. Vrain River CO0041700 COSPSV06
updated 08/28/00 Page 7 of 14 APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
Dolores River* TRC X Thomas E. and Sharen E. Kurpius RV 06/05/98 (Segment 4) Fecal Coliform X Park COSJDO04 Ammonia X CO0042561
S. Saint Vrain Creek TRC X 7th Day Adventist Assoc. of Colorado 06/05/98 (Segment 2) Fecal Coliform X CO0030112 COSPSV02 Ammonia X
Goose Creek TRC X Lost Valley Ranch Corp. 08/28/98 (Segment 4 of the Fecal Coliform X CO0027219 Upper S. Platte River Ammonia X Basin
Colorado River TRC X Hot Sulphur Springs 08/28/98 (Segment 3 of the Fecal Coliform X CO0024350 Upper Colorado River Ammonia X Sub-basin)
Crowley Drain Canal Fecal Coliform X Town of Crowley 08/28/98 (Segment 2 Lower CO0041599 Arkansas River)
Hanging Bridge Gulch Fecal Coliform X Royal Gorge Company of Colorado 08/28/98 (Segment 14 of the CO0029033 Upper Arkansas River Sub-basin)
Wisp Creek (Segment TRC X Will-O-Wisp 08/28/98 4 Upper South Platte Fecal Coliform X Metropolitan District River) Ammonia X CO0041521
Boxelder Creek Fecal Coliform X Town of Wellington 01/24/99 CO-0021032
Eagle River* Ammonia X Eagle River Water & Sanitation 01/24/99 TRC X District Fecal Coliform X CO-0024431 Mercury X Silver X
Eagle River* TRC X Town of Eagle 01/24/99 Fecal Coliform X CO-0021059
East River Ammonia X East River Regional Sanitation 01/24/99 TRC X District Fecal Coliform X CO-0040720
Gooseberry Gulch Fecal Coliform X Mountain Water and Sanitation 01/24/99 District CO-0022730
Marcy Gulch / South Ammonia X Centennial Water and Sanitiation 01/24/99 Platte* Fecal Coliform X District TRC X CO-0037966 Silver X Mercury X Copper X Manganese X
Middle Boulder Creek Ammonia X Town of Nederland 01/24/99 TRC X CO-0020222 Fecal Coliform X
Middle Fork of South Ammonia X Town of Alma 01/24/99 Platte* TRC X CO-0035769 Fecal Coliform X
Muddy Creek Ammonia X Kremmling 01/24/99 TRC X CO-0021636 Fecal Coliform X
updated 08/28/00 Page 8 of 14 APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
Slate River* Ammonia X Town of Crested Butte 01/24/99 TRC X CO-0020443 Fecal Coliform X
Woods Creek / Ammonia X Mount Crested Butte Water & San. 01/24/99 Washington Gulch TRC X District Fecal Coliform X CO-0027171
Yampa River TRC X Town of Yampa 01/24/99 Fecal Coliform X CO-0030635
Fountain Creek / Ammonia X City of Colorado Springs Utilities 03/10/99 Arkansas River Fecal Coliform X CO-0026735 TRC X Cyanide X
Cache La Poudre Ammonia X Eastman-Kodak Company 03/10/99 River* Chromium X (Windsor WWTP) Copper X CO-0032158 Silver X Zinc X
North Turkey Creek Ammonia X Conifer Sanitation Association 06/29/99 TRC X CO-0040096 Fecal Coliform X
Arkansas River* Fecal Coliform X North La Junta Sanitation District 09/23/99 TRC X CO-0039519
Middle Fork of the Fecal Coliform X Fairplay Sanitation District 09/27/99 South Platte River* TRC X CO-0040088 Ammonia X
Blue River* Fecal Coliform X Breckenridge Sanitation District 11/19/99 Zinc X Iowa Hill WWTF TRC X CO-0045420
Hartman Draw Ammonia X Cortez Sanitation District North 11/19/99 /McElmo Creek CO0020125
Yampa River* TRC X Steamboat Health and Recreation 11/19/99 Center CO0032280
South Boulder Creek* Fecal Coliform X Keith Cowan DBA San Souci Mobile 02/29/00 TRC X Home Park Ammonia X CO0020061
Plateau Creek* Fecal Coliform X Town of Colbran 04/12/00 TRC Xa CO-0040487 Ammonia Xa
Culebra Creek* Fecal Coliform X Costilla County Water & Sanitation 04/12/00 TRC Xa District Ammonia Xa CO-0036528
Arkansas River* Fecal Coliform X Las Animas WWTP 05/12/00 TRC X CO-0040690
Cache La Poudre Fecal Coliform X City of Fort Collins - Mulberry Facility 05/12/00 River* Seg. 11a TRC X CO-0026425
Cache La Poudre Fecal Coliform X City of Fort Collins - Drake Facility 05/12/00 River* Seg. 11b TRC X CO-0026425
Eagle River* Fecal Coliform X Eagle River Water & Sanitation 05/12/00 TRC Xa District Mercury X CO-0040690 Ammonia X
Fraser River* Fecal Coliform X Tabernash Meadows 07/06/00 COUCUC10 TRC X CO-0045501 Ammonia X
updated 08/28/00 Page 9 of 14 APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
Fraser River* Fecal Coliform X Winter Park Water & Sanitation 07/06/2000 COUCUC10 TRC X District Ammonia X CO-0026051
Fraser River* Fecal Coliform X Fraser Sanitation District “
COUCUC10 TRC Xa CO-0040142 Mercury X Silver X Ammonia X
Stagecoach Fecal Coliform X Morrison Creek Metropolitan Water “ Reservoir* TRC X and Sanitation District COUCYA02BL Ammonia X CO-00229696
Willow Creek* Fecal Coliform X City of Creede Wastewater “ CORGR07 TRC X Treatment Plant CO-0040533
South Platte River* Dissolved Oxygen X Metro District 07/30/2000 COSPUS15 South Adams County W&SD City of Brighton
Unnamed Tributary to Ammonia X Three Lakes Water & Sanitation “ Willow Creek* District COUCUC06C CO-0037681
West Dolores River Arsenic (diss) X Lucas Property Holdings, Inc. 08/07/00 Iron (diss) X Emma Mine Iron (TR) X CO-0045756 Zinc (PD) X
Westerly Creek/ Sand Tetrachloroethene X Mobile Environmental Analytical, Inc. “ Creek Trichloroethene X CO-0045772 MTBE X 1,2-Dichlorethane X
Purgatoire River and Iron(diss) X KLT Gas, Inc. Raton Basin Project “ tributaries Iron(TR) X CO-0042978 Lead(diss) X Manganese (diss) X
Rio Grande River Fecal Coliform X City of Monte Vista - Henderson 08/14/2000 Facility CO-0023132
Rio Grande River Fecal Coliform X City of Monte Vista - Veterans Center “ TRC X Facility Ammonia X CO-0036927
Purgatoire River* Fecal Coliform X City of Trinidad Sanitation District 08/14/2000 COARLa07 TRC X CO-0031232 Ammonia X
Cache La Poudre Fecal Coliform X Western Sugar Company - Greeley “ River* TRC X CO-0041360 COSPCP12 Ammonia X
San Miguel River Fecal Coliform Xa Town Of Naturita “ COGUSM05 TRC Xa CO-0024007
Bear Creek* / West Fecal Coliform X Perry Park Water and Sanitation, “ Plum Creek TRC X Waucondah WTP COSPUS11b Ammonia X CO-0022551
Fraser River* Fecal Coliform X Granby Sanitation District “ COUCUC10 TRC X CO-0020699 Ammonia X
Cache La Poudre Fecal Coliform X City of Greeley 08/16/2000 River* TRC X CO-0040258 COSPCP12 Ammonia X
Box Elder Creek/ Fecal Coliform X Box Elder Sanitation District “ Poudre River TRC X CO-0020478
updated 08/28/00 Page 10 of 14 APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
Animas River* Fecal Coliform X Town of Silverton WWTP 08/31/00 COSJAF03b TRC X CO-0020311 TRC X
Gunnison River* Ammonia X City of Gunnison WWTP 11/28/00 COGUUG14 CO-0041530
Animas River* Fecal Coliform Xa City of Durango “ COSJAF5A TRC Xa CO-0024082 Ammonia Xa
Big Beaver Creek/ Fecal Coliform Xa Powderhorn Metropolitan District #2 “ Mesa Creek TRC Xa WWTP COLCLC15 CO-0023485
South Platte River* Fecal Coliform X Town of Julesburg “ COSPLS01 TRC X CO-0021113 Ammonia X
Stevens Draw*/ Fecal Coliform X Pagosa Area Water and Sanitation “ Stollsteimer Creek District- Vista WWTF COSJP106A CO-0031755
Coal Creek* Copper Xa Cyprus Climas Mine 11/28/00 COGUUG12 Lead Xa CO-0035394 Zinc Xa
North Clear Creek* Fecal Coliform X Black Hawk/Central City Sanitation 01/08/2001 COSPCL13 TRC X District Ammonia X CO-0023949
South Platte River* Fecal Coliform X City of Fort Lupton “ COSPMS01 TRC X CO-0021440 Copper, PD X
Rito Seco Aluminum, PD Xa Battle Mountain Gold Company, San 01/08/2001 Arsenic Xa Luis Cadmium,PD Xa CO-0045675 Copper,PD Xa Iron, Diss. Xa Iron, TR Xa Lead, PD Xa Managenese, Diss Xa Manganese, TR Xa Total Radium Xa Selenium, Total Xa Silver, PD Xa Utanium. Total Xa Zinc, PDl Xa Fluoride Xa Sulfate Xa
Blue River Fecal Coliform Xa Silverthorne/Dillon Joint Authority, Jan. 22, 2001 TRC Xa Blue River WWTF Ammonia Xa CO-0020826
Trout Creek* Iron (PD) X Pittsburg and Midway Mining Jan. 22, 2001(2) COUCYA13C Iron (TR) X Company Manganese X Permit#CO-0032638 Mercury X Sulfate X
Gore Creek Fecal Coliform X Eagle River Water & Sanitation Jan. 22, 2001(3)
COUCEA08 TRC Xa District Ammonia Xa CO-0021369 Copper, PD X Lead, PD X
Mercury, TR Xa Silver, PD X
Roaring Fork River* Fecal Coliform Xa Aspen Consolidated Sanitation “ (3) COUCRF03 TRC Xa District Ammonia Xa CO-0026837
updated 08/28/00 Page 11 of 14 APPROVED POINT SOURCE TMDLs
Waterbody Name TMDL Parameter/ Section Section Point Source Approval Date Pollutant 303(d)(1) 303(d)(3) TMDL TMDL
California Gulch*/ Fecal Coliform Xa Leadville Sanitation District “ (3) Arkansas River* TRC Xa CO-0021164 Ammonia Xa
Approval - Nonpoint Source
Waterbody TMDL Water Quality TMDL Reference Document(s) Approval Name Parameter/ Goal/Endpoint Date Pollutant
Cherry Creek total 15 µg/l chlorophyll a 14,270 lbs total Cherry Creek Basin Control July 24, 1997 Reservoir phosphorus as an inlake phosphorus per year Regulation (9/95); Cherry Creek COSPCH02 concentration Basin Master Plan; Cherry Creek 33a/33b Clean Lakes Study
Chatfield total 27 µg/l total 59,000 lbs total Chatfield Reservoir Control Regulation “ Reservoir phosphorus phosphorus as an phosphorus per year (10/96); Chatfield Clean Lakes Study COSPUS06LZ inlake concentration 34a/34b
Bear Creek total Trophic state 70% reduction in Bear Creek Watershed Control “ Lake phosphorus mesotrophic/eutrophic total phosphorus Regulation (5/96); Bear Creek Clean COSPBE01C from current condition loading Lakes Study 35a/35b of eutrophic/hyertrophic
Dillon total 7.4 µg/l total 10,162 lbs total Dillon Reservoir Control Regulation “ Reservoir phosphorus phosphorus as a phosphorus per year (6/96); Dillon Reservoir Clean Lakes COUCBL03L1 depth integrated value Study in the top 15 meters 36a/36b during the growing season
updated 08/28/00 Page 12 of 14 Chatfield phosphorus 27 µg/l total 59,000 lbs total •Colorado Dept of Public Health & October 19, Reservoir phosphorus as an phosphorus per year Envm.; Water Quality Control 1999 COSPUS06LZ inlake concentration Commission; Regulation No. 73; Chatfield Reservoir Control Regulation (Amended 8/09/99, Eff. 09/30/99) •Chatfield Watershed & Reservoir: 1986-1995 Historical Data Analysis and Monitoring Program Review; DRCOG (July 1997) •Nonpoint Source Management Plan for Chatfield Reservoir, CO; Woodward-Clyde Cons. (09/92) •Chatfield Reservoir Clean Lakes Study; DRCOG (04/84)
Straight Creek* Sediment • minimum substrate • 25% reduction in • Total Maximum Daily Load August 11,
COUCBL18 d50 (median particle annual traction sand Assessment; Straight Creek; Summit 2000 size of 60 mm • revegetation of County, Colorado; June 2000 • maximum stream 70% of cut and fill (CHPHE/WQCC) pool V* of 0.15 slopes to 70% • Provisional Implementation • Stable stream potential cover Guidance for Determining Sediment morphology Deposition Impacts to Aquatic Life in • five age classes of Streams and Rivers; 1998 brook trout (CDPHE/WQCC)
Mosquito Zinc • Zinc = 110 ug/l • TMDLs are • Total Maximum Daily Load “ Creek* Cadmium (chronic, seg. 2b) expressed in pounds Assessment; Mosquito Creek; Park COSPUS02b Lead • cadmium = 1.33 per day (30 day County, Colorado; June 12, 2000 ug/l (chronic) average) for zinc, (CDPHE/WQCC) • Lead = 5.22 ug/l cadmium, (chronic) manganese, and iron. TMDLs are expressed for each month of the year reflecting seasonal conditions. (See Table 9 in the State’s TMDL Assessment for actual TMDL values).
Waterbody TMDL Water Quality TMDL Reference Document(s) Approval Name Parameter Goal/Endpoint Date / Pollutant
South Mosquito Zinc #Zinc = 250 ug/l Creek* Cadmium (chronic) COSPUS02c Iron #cadmium = 1.31 ug/l Manganese (chronic) #Iron = 300 ug/l (chronic, diss) 1000 ug/l (acute, TR) #Manganese= 50 ug/l (chronic, diss) 1000 ug/l (chronic,TR)
San Miguel Sediment # achieve narrative #14 kg/day (annual #Total Maximum Daily Load August 11, River standard regarding average) Assessment; San Miguel River 2000 settleable substances Segment 3b; Sediment; San Miguel as a result of 30% County, Colorado; June 15, 2000. reduction in sediment (CDPHE/WQCC) from early spring runoff; # return the River from non-supporting to supporting in terms of aquatic life habitat.
updated 08/28/00 Page 13 of 14 Box Canyon Sediment # benthic sediment • 74% reduction in #TMDL Assessment; Box Canyon August 30, Creek* <25% fines (<8mm roads and in road Creek, Montezuma County, Colorado; 2000 diameter) density to 1.8 mi/mi2 June 2000 (CDPHE/WQCC). # macroinvertebrate as well as other community metric of reductions due to #Protocol for Developing Sediment EPT:C of >0.5 road and grazing TMDLs (1st edt); EPA 841-B-99-004; water quality Oct. 1999 practices #EA for Lucy Timber Sale and Box (approximates 75% Canyon Watershed Restoration; reduction in long USDA Forest Service, Region 2, San term yield to Juan & Rio Grande National Forests, significant source) Mancos-Dolores Ranger District, Montezuma County, Colorado, August 1999 #”Provisional Implementation Guidance for Determining Sediment Deposition Impacts to Aquatic Life in Streams and Rivers” CDPHE/WQCD; June 1998
* These waterbodies are currently on or have been on the State's Section 303(d) waterbody list. The TMDLs associated with these waters are considered Section 303(d)(1) TMDLs. All others are considered Section 303(d)(3) TMDLs since the waters were not on the State's waterbody list.
updated 08/28/00 Page 14 of 14