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TMDL prioritization

DRAFT Colorado TMDL Prioritization Framework

Comments are accepted through November 30, 2024, via email to TMDLinfo@state.co.us.

If you have recommendations for impaired waters to prioritize for TMDL development beginning in 2029, please provide your input in this survey.

TMDLs and Advanced Restoration Plans Currently in Development
Waterbody AUID
Waterbody
Major Basin
Pollutants
Target Year

COARMA12_A

Huerfano River

Arkansas

Selenium

2025

COARLA01b_A

Arkansas River, Colorado Canal to John Martin Reservoir

Arkansas

Selenium

2025

COARLA04a_A,B

Apishapa River

Arkansas

Selenium

2025

COARLA04a_A

Timpas Creek

Arkansas

Selenium

2025

COARLA09a_B

Horse Creek

Arkansas

Selenium

2025

COARLA09a_C

Adobe Creek

Arkansas

Selenium

2025

COARMA12_A

Huerfano River

Arkansas

Selenium

2025

COSPBE01c_A

Bear Creek Reservoir

South Platte

Phosphorus, chl-a

2025

COARLA01c_A

Arkansas River, John Martin Reservoir to the Colorado/Kansas border.

Arkansas

Selenium (ARP)

2026

COARLA09a_E

Wiley Drainage Ditch

Arkansas

Selenium (ARP)

2026

COARLA09a_F

Wild Horse Creek

Arkansas

Selenium (ARP)

2026

COARLA09b_B

Big Sandy Creek within Prowers County.

Arkansas

Selenium (ARP)

2026

COSPCP11_B, 12a_B, 12a_A, 12b_A

Cache La Poudre River

South Platte

E. coli

2026

COSPCP13a_D

Spring Creek

South Platte

E. coli

2026

COSPCP13a_E

Fossil Creek

South Platte

E. coli

2026

COSPCP13b_C, 13c_B

Boxelder Creek

South Platte

E. coli

2026

COSPBE02_C

Bear Creek below Kipling Parkway

South Platte

E. coli

2027

COARUA15_A

DeWeese Reservoir

Arkansas

Dissolved Oxygen and phosphorus

2027

COSPCL02a,b,c_B,C,F

Mainstem of Clear Creek and tribs

South Platte

Cd, Zn

2027

COSPCL02c_B

Turkey Gulch

South Platte

Cd, Zn, Cu, Fe, Mn, Ni

2027

COSPCL03b_A

Leavenworth Creek

South Platte

Cd, Cu

2027

COSPCL05_B

West Fork of Clear Creek

South Platte

Cu

2027

COSPCL06_C

North Empire Creek

South Platte

Cd, Zn, Cu, Fe, Mn, Ni, Pb

2027

COSPCL09a_B

Silver Creek

South Platte

Pb, Cu

2027

COSPCL09a_C

Fall River

South Platte

Zn

2027

COSPCL10_A

Chicago Creek, mainstem and all tributaries

South Platte

Cu

2027

COSPCL12a_B

Gilson Gulch and tribs

South Platte

Cd, Cu, Fe, Pb, Mn, Ni, Zn

2027

COSPCL13b_C

Gregory, Russell, Silver Gulches and tribs

South Platte

Cd

2027

COSPUS16a_A, 16i_A, 16i_B

Sand Creek

South Platte

E. coli

2028

COSPCL15_B, 15_C

Clear Creek

South Platte

E. coli

2028

COSPCL18a_A

Ralston Creek

South Platte

E. coli

2028

COARFO01a_C, 1a_D, 2a_B, 2a_C, 2a_D, 2b_A

Fountain Creek

Arkansas

E. coli

2028

COARFO06_B, 6_C

Monument Creek

Arkansas

E. coli

2028

COSPMS01a_A

South Platte River from Big Dry Creek to St. Vrain Creek.

South Platte

E. coli

2028

COSPCH03_A

Mainstem of Cherry Creek from the outlet of Cherry Creek Reservoir to Holly Street.

South Platte

E. coli

2028

COSPCH03_B

Mainstem of Cherry Creek from Holly street to the confluence with the South Platte River.

South Platte

E. coli

2028

COGUUN02_A, 3a_A, 3b_A, 3c_A

Uncompahgre River

Gunnison

Mn, pH, Zn

2028

COGUUN05_B

Commodore Gulch

Gunnison

Zn

2028

COGUUN05_C 

Governor Basin

Gunnison

Cd, Cu, Mn, Pb, Zn

2028

COGUUN05_E

Sneffels Creek

Gunnison

Cd, Mn, Pb, Zn

2028

COGUUN06a_A 

Red Mountain Creek

Gunnison

Ag, Cu

2028

COGUUN07_A 

Gray Copper Gulch

Gunnison

Cu, Pb, pH, Zn

2028

COGUUN08_A 

Mineral Creek

Gunnison

Cd, Cu, Zn

2028

COGUUN09_B 

Sneffels Creek

Gunnison

Cd, Pb, Zn

2028

COGUUN09_C 

Canyon Creek

Gunnison

Zn

2028

COGUUN09_D

Imogene Creek

Gunnison

Cd, Zn

2028