Watershed Quality Assessment Report | WATERS

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Assessment Summary
Causes of Impairment
Probable Sources Contributing to Impairment
TMDL Alternatives by Cause of Impairment
Cumulative TMDLs by Pollutant

Montana State Report

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Montana, Upper Clark Fork Watershed

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Features

Assessment Summary for Reporting Year 2010
Montana, Upper Clark Fork Watershed

Description of this table
Click here to list Threatened and Impaired Waters Only

Waterbody Name	Waterbody ID	Location	Map	Waterbody Type	Size	Units	Status	State TMDL Development Status
NOTE: Click on the underlined "Waterbody Name" to view a Waterbody report.
Antelope Creek	MT76G002_140	Antelope Creek, Headwaters To Mouth (Gardner Ditch)	Waterbody Map	River	6.1	Miles	Impaired	TMDL completed
Beefstraight Creek	MT76G003_031	Beefstraight Creek, Minnesota Gulch To Mouth (German Gulch)	Waterbody Map	River	3.5	Miles	Impaired	TMDL completed
Brock Creek	MT76G005_100	Brock Creek, Headwaters To Mouth (Clark Fork River)	Waterbody Map	River	12.5	Miles	Impaired	TMDL completed
Cable Creek	MT76G002_030	Cable Creek, Headwaters To Mouth (Warm Springs Creek)	Waterbody Map	River	6.4	Miles	Impaired	TMDL completed
Carpenter Creek	MT76G004_091	Carpenter Creek, Headwaters To Basin Creek	Waterbody Map	River	3.7	Miles	Impaired	Non-pollutant impairment
Carpenter Creek	MT76G004_092	Carpenter Creek, Basin Creek To Mouth (Little Blackfoot River)	Waterbody Map	River	4.9	Miles	Impaired	Non-pollutant impairment
Clark Fork River	MT76G001_010	Clark Fork River, Flint Creek To Little Blackfoot River	Waterbody Map	River	27.8	Miles	Impaired	TMDL needed
Clark Fork River	MT76G001_030	Clark Fork River, The Little Blackfoot River To Cottonwood Creek	Waterbody Map	River	14.9	Miles	Impaired	TMDL needed
Clark Fork River	MT76G001_040	Clark Fork River, Cottonwood Creek To Warm Springs Creek	Waterbody Map	River	27.8	Miles	Impaired	TMDL needed
Dempsey Creek	MT76G002_100	Dempsey Creek, The National Forest Boundary To Mouth (Clark Fork River)	Waterbody Map	River	13.4	Miles	Impaired	TMDL needed
Dog Creek	MT76G004_071	Dog Creek, Headwaters To Meadow Creek	Waterbody Map	River	4.3	Miles	Impaired	TMDL needed
Dog Creek	MT76G004_072	Dog Creek, Meadow Creek To Mouth (Little Blackfoot River)	Waterbody Map	River	13.6	Miles	Impaired	TMDL needed
Dunkleberg Creek	MT76G005_071	Dunkleberg Creek, Headwaters To T9n R12w S2 Sw	Waterbody Map	River	3.9	Miles	Impaired	TMDL completed
Dunkleberg Creek	MT76G005_072	Dunkleberg Creek, T9n R12w S2 To Mouth (Un-Named Canal), T10n R11w S30	Waterbody Map	River	4.1	Miles	Impaired	TMDL needed
Elliston Creek	MT76G004_040	Elliston Creek, Headwaters To Mouth (Little Blackfoot River)	Waterbody Map	River	5.0	Miles	Impaired	Non-pollutant impairment
German Gulch	MT76G003_030	German Gulch, Headwaters To Mouth (Silver Bow Creek)	Waterbody Map	River	8.2	Miles	Impaired	TMDL completed
Gold Creek	MT76G005_091	Gold Creek, Headwaters To National Forest Boundary	Waterbody Map	River	8.1	Miles	Impaired	TMDL completed
Gold Creek	MT76G005_092	Gold Creek, The Forest Boundary To Mouth (Clark Fork River)	Waterbody Map	River	7.8	Miles	Impaired	TMDL needed
Hoover Creek	MT76G005_081	Hoover Creek, Headwaters To Miller Lake	Waterbody Map	River	5.2	Miles	Impaired	TMDL completed
Hoover Creek	MT76G005_082	Hoover Creek, Miller Lake To Mouth (Clark Fork River)	Waterbody Map	River	7.1	Miles	Impaired	TMDL needed
Little Blackfoot River	MT76G004_010	Little Blackfoot River, Dog Creek To Mouth (Clark Fork River)	Waterbody Map	River	26.5	Miles	Impaired	TMDL needed
Little Blackfoot River	MT76G004_020	Little Blackfoot River, The Headwaters To Dog Creek	Waterbody Map	River	22.5	Miles	Impaired	TMDL needed
Lost Creek	MT76G002_071	Lost Creek, Headwaters To South State Park Boundary	Waterbody Map	River	7.2	Miles	Good
Lost Creek	MT76G002_072	Lost Creek, The South State Park Boundary To Mouth (Clark Fork River)	Waterbody Map	River	19.1	Miles	Impaired	TMDL needed
Mill Creek	MT76G002_051	Mill Creek, Headwaters To Section Line Between Sec 27 And 28, T4n, R11w	Waterbody Map	River	11.0	Miles	Impaired	TMDL needed
Mill Creek	MT76G002_052	Mill Creek, Line Between Sections 27-28 T4n R11w To Mouth (Silver Bow Creek)	Waterbody Map	River	9.8	Miles	Impaired	TMDL needed
Mill Willow Bypass	MT76G002_120	Mill Willow Bypass, Silver Bow Creek To Clark Fork River	Waterbody Map	River	4.9	Miles	Impaired	TMDL completed
Modesty Creek	MT76G002_080	Modesty Creek, Headwaters To Mouth (Clark Fork River)	Waterbody Map	River	14.7	Miles	Impaired	TMDL completed
Monarch Creek	MT76G004_060	Monarch Creek, Headwaters To Mouth (Ontario Creek)	Waterbody Map	River	4.7	Miles	Impaired	TMDL needed
Peterson Creek	MT76G002_131	Peterson Creek, Headwaters To Jack Creek	Waterbody Map	River	6.3	Miles	Impaired	TMDL needed
Peterson Creek	MT76G002_132	Peterson Creek, Jack Creek To Mouth (Clark Fork River)	Waterbody Map	River	7.1	Miles	Impaired	TMDL completed
Racetrack Creek	MT76G002_090	Racetrack Creek, The National Forest Boundary To Mouth (Clark Fork River)	Waterbody Map	River	11.1	Miles	Impaired	Non-pollutant impairment
Silver Bow Creek	MT76G003_020	Silver Bow Creek, Headwaters To Mouth (Clark Fork River), T5n R9w S18	Waterbody Map	River	29.2	Miles	Impaired	TMDL needed
Snowshoe Creek	MT76G004_080	Snowshoe Creek, Headwaters To Mouth (Little Blackfoot River)	Waterbody Map	River	11.5	Miles	Impaired	TMDL needed
Spotted Dog Creek	MT76G004_031	Spotted Dog Creek, North Fork To Forest Boundary	Waterbody Map	River	.9	Miles	Good
Spotted Dog Creek	MT76G004_032	Spotted Dog Creek, Forest Boundary To Mouth (Little Blackfoot River)	Waterbody Map	River	10.7	Miles	Impaired	TMDL needed
Storm Lake Creek	MT76G002_040	Storm Lake Creek, Headwaters To Mouth (Un-Named Canal/Ditch)	Waterbody Map	River	9.7	Miles	Impaired	TMDL completed
Telegraph Creek	MT76G004_051	Telegraph Creek, Headwaters To Hahn Creek	Waterbody Map	River	5.4	Miles	Impaired	TMDL needed
Telegraph Creek	MT76G004_052	Telegraph Creek, Hahn Creek To Mouth (Little Blackfoot River)	Waterbody Map	River	2.5	Miles	Impaired	TMDL needed
Threemile Creek	MT76G004_111	Threemile Creek, Headwaters To Quigley Ranch Reservoir	Waterbody Map	River	6.3	Miles	Good
Threemile Creek	MT76G004_112	Threemile Creek, Quigley Ranch Reservoir To Mouth (Little Blackfoot River)	Waterbody Map	River	7.5	Miles	Impaired	Non-pollutant impairment
Tin Cup Joe Creek	MT76G002_110	Tin Cup Joe Creek, Tin Cup Lake To Mouth (Clark Fork River)	Waterbody Map	River	6.8	Miles	Impaired	TMDL completed
Trout Creek	MT76G004_120	Trout Creek, Headwaters To Mouth (Little Blackfoot River)	Data Unavailable	River	11.5	Miles	Not_Assessed
Twin Lakes Creek	MT76G002_020	Twin Lakes Creek, East Fork To Mouth (Warm Springs Creek)	Waterbody Map	River	5.3	Miles	Good
Un-Named Creek	MT76G006_010	Un-Named Creek, Headwaters To Mouth (Ontario Creek), T8n R6w S27	Waterbody Map	Freshwater Lake	20.0	Acres	Impaired	TMDL needed
Warm Springs Creek	MT76G002_011	Warm Springs Creek, Headwaters To Meyers Dam, T5n R12w S25	Waterbody Map	River	14.7	Miles	Impaired	Non-pollutant impairment
Warm Springs Creek	MT76G002_012	Warm Springs Creek, Meyers Dam T5n R12w S25 To Mouth (Clark Fork), T6n R9w S6	Waterbody Map	River	17.2	Miles	Impaired	TMDL completed
Warm Springs Creek	MT76G005_111	Warm Springs Creek, Headwaters To R9w And R10w	Waterbody Map	River	9.5	Miles	Impaired	TMDL needed
Warm Springs Creek	MT76G005_112	Warm Springs Creek, From Line Between R9w And R10w To Mouth (Clark Fork River)	Waterbody Map	River	6.3	Miles	Impaired	TMDL completed
Willow Creek	MT76G002_061	Willow Creek, Headwaters To T4n R10w S30	Waterbody Map	River	6.1	Miles	Impaired	TMDL needed
Willow Creek	MT76G002_062	Willow Creek, T4n R10w S30 To Mouth (Mill Creek), T4n R10w S11	Waterbody Map	River	7.1	Miles	Impaired	TMDL completed
Woodson Gulch	MT76G004_100	Woodson Gulch, Headwaters To Mouth (Carpenter Creek), T11n R7w S29	Waterbody Map	River	.8	Miles	Impaired	Non-pollutant impairment

Description of this table
Click here to list All Assessed Waters

Waterbody Name	Waterbody ID	Location	Map	Waterbody Type	Size	Units	Status	State TMDL Development Status
NOTE: Click on the underlined "Waterbody Name" to view a Waterbody report.
Antelope Creek	MT76G002_140	Antelope Creek, Headwaters To Mouth (Gardner Ditch)	Waterbody Map	River	6.1	Miles	Impaired	TMDL completed
Beefstraight Creek	MT76G003_031	Beefstraight Creek, Minnesota Gulch To Mouth (German Gulch)	Waterbody Map	River	3.5	Miles	Impaired	TMDL completed
Brock Creek	MT76G005_100	Brock Creek, Headwaters To Mouth (Clark Fork River)	Waterbody Map	River	12.5	Miles	Impaired	TMDL completed
Cable Creek	MT76G002_030	Cable Creek, Headwaters To Mouth (Warm Springs Creek)	Waterbody Map	River	6.4	Miles	Impaired	TMDL completed
Carpenter Creek	MT76G004_091	Carpenter Creek, Headwaters To Basin Creek	Waterbody Map	River	3.7	Miles	Impaired	Non-pollutant impairment
Carpenter Creek	MT76G004_092	Carpenter Creek, Basin Creek To Mouth (Little Blackfoot River)	Waterbody Map	River	4.9	Miles	Impaired	Non-pollutant impairment
Clark Fork River	MT76G001_010	Clark Fork River, Flint Creek To Little Blackfoot River	Waterbody Map	River	27.8	Miles	Impaired	TMDL needed
Clark Fork River	MT76G001_030	Clark Fork River, The Little Blackfoot River To Cottonwood Creek	Waterbody Map	River	14.9	Miles	Impaired	TMDL needed
Clark Fork River	MT76G001_040	Clark Fork River, Cottonwood Creek To Warm Springs Creek	Waterbody Map	River	27.8	Miles	Impaired	TMDL needed
Dempsey Creek	MT76G002_100	Dempsey Creek, The National Forest Boundary To Mouth (Clark Fork River)	Waterbody Map	River	13.4	Miles	Impaired	TMDL needed
Dog Creek	MT76G004_071	Dog Creek, Headwaters To Meadow Creek	Waterbody Map	River	4.3	Miles	Impaired	TMDL needed
Dog Creek	MT76G004_072	Dog Creek, Meadow Creek To Mouth (Little Blackfoot River)	Waterbody Map	River	13.6	Miles	Impaired	TMDL needed
Dunkleberg Creek	MT76G005_071	Dunkleberg Creek, Headwaters To T9n R12w S2 Sw	Waterbody Map	River	3.9	Miles	Impaired	TMDL completed
Dunkleberg Creek	MT76G005_072	Dunkleberg Creek, T9n R12w S2 To Mouth (Un-Named Canal), T10n R11w S30	Waterbody Map	River	4.1	Miles	Impaired	TMDL needed
Elliston Creek	MT76G004_040	Elliston Creek, Headwaters To Mouth (Little Blackfoot River)	Waterbody Map	River	5.0	Miles	Impaired	Non-pollutant impairment
German Gulch	MT76G003_030	German Gulch, Headwaters To Mouth (Silver Bow Creek)	Waterbody Map	River	8.2	Miles	Impaired	TMDL completed
Gold Creek	MT76G005_091	Gold Creek, Headwaters To National Forest Boundary	Waterbody Map	River	8.1	Miles	Impaired	TMDL completed
Gold Creek	MT76G005_092	Gold Creek, The Forest Boundary To Mouth (Clark Fork River)	Waterbody Map	River	7.8	Miles	Impaired	TMDL needed
Hoover Creek	MT76G005_081	Hoover Creek, Headwaters To Miller Lake	Waterbody Map	River	5.2	Miles	Impaired	TMDL completed
Hoover Creek	MT76G005_082	Hoover Creek, Miller Lake To Mouth (Clark Fork River)	Waterbody Map	River	7.1	Miles	Impaired	TMDL needed
Little Blackfoot River	MT76G004_010	Little Blackfoot River, Dog Creek To Mouth (Clark Fork River)	Waterbody Map	River	26.5	Miles	Impaired	TMDL needed
Little Blackfoot River	MT76G004_020	Little Blackfoot River, The Headwaters To Dog Creek	Waterbody Map	River	22.5	Miles	Impaired	TMDL needed
Lost Creek	MT76G002_072	Lost Creek, The South State Park Boundary To Mouth (Clark Fork River)	Waterbody Map	River	19.1	Miles	Impaired	TMDL needed
Mill Creek	MT76G002_051	Mill Creek, Headwaters To Section Line Between Sec 27 And 28, T4n, R11w	Waterbody Map	River	11.0	Miles	Impaired	TMDL needed
Mill Creek	MT76G002_052	Mill Creek, Line Between Sections 27-28 T4n R11w To Mouth (Silver Bow Creek)	Waterbody Map	River	9.8	Miles	Impaired	TMDL needed
Mill Willow Bypass	MT76G002_120	Mill Willow Bypass, Silver Bow Creek To Clark Fork River	Waterbody Map	River	4.9	Miles	Impaired	TMDL completed
Modesty Creek	MT76G002_080	Modesty Creek, Headwaters To Mouth (Clark Fork River)	Waterbody Map	River	14.7	Miles	Impaired	TMDL completed
Monarch Creek	MT76G004_060	Monarch Creek, Headwaters To Mouth (Ontario Creek)	Waterbody Map	River	4.7	Miles	Impaired	TMDL needed
Peterson Creek	MT76G002_131	Peterson Creek, Headwaters To Jack Creek	Waterbody Map	River	6.3	Miles	Impaired	TMDL needed
Peterson Creek	MT76G002_132	Peterson Creek, Jack Creek To Mouth (Clark Fork River)	Waterbody Map	River	7.1	Miles	Impaired	TMDL completed
Racetrack Creek	MT76G002_090	Racetrack Creek, The National Forest Boundary To Mouth (Clark Fork River)	Waterbody Map	River	11.1	Miles	Impaired	Non-pollutant impairment
Silver Bow Creek	MT76G003_020	Silver Bow Creek, Headwaters To Mouth (Clark Fork River), T5n R9w S18	Waterbody Map	River	29.2	Miles	Impaired	TMDL needed
Snowshoe Creek	MT76G004_080	Snowshoe Creek, Headwaters To Mouth (Little Blackfoot River)	Waterbody Map	River	11.5	Miles	Impaired	TMDL needed
Spotted Dog Creek	MT76G004_032	Spotted Dog Creek, Forest Boundary To Mouth (Little Blackfoot River)	Waterbody Map	River	10.7	Miles	Impaired	TMDL needed
Storm Lake Creek	MT76G002_040	Storm Lake Creek, Headwaters To Mouth (Un-Named Canal/Ditch)	Waterbody Map	River	9.7	Miles	Impaired	TMDL completed
Telegraph Creek	MT76G004_051	Telegraph Creek, Headwaters To Hahn Creek	Waterbody Map	River	5.4	Miles	Impaired	TMDL needed
Telegraph Creek	MT76G004_052	Telegraph Creek, Hahn Creek To Mouth (Little Blackfoot River)	Waterbody Map	River	2.5	Miles	Impaired	TMDL needed
Threemile Creek	MT76G004_112	Threemile Creek, Quigley Ranch Reservoir To Mouth (Little Blackfoot River)	Waterbody Map	River	7.5	Miles	Impaired	Non-pollutant impairment
Tin Cup Joe Creek	MT76G002_110	Tin Cup Joe Creek, Tin Cup Lake To Mouth (Clark Fork River)	Waterbody Map	River	6.8	Miles	Impaired	TMDL completed
Un-Named Creek	MT76G006_010	Un-Named Creek, Headwaters To Mouth (Ontario Creek), T8n R6w S27	Waterbody Map	Freshwater Lake	20.0	Acres	Impaired	TMDL needed
Warm Springs Creek	MT76G002_011	Warm Springs Creek, Headwaters To Meyers Dam, T5n R12w S25	Waterbody Map	River	14.7	Miles	Impaired	Non-pollutant impairment
Warm Springs Creek	MT76G002_012	Warm Springs Creek, Meyers Dam T5n R12w S25 To Mouth (Clark Fork), T6n R9w S6	Waterbody Map	River	17.2	Miles	Impaired	TMDL completed
Warm Springs Creek	MT76G005_111	Warm Springs Creek, Headwaters To R9w And R10w	Waterbody Map	River	9.5	Miles	Impaired	TMDL needed
Warm Springs Creek	MT76G005_112	Warm Springs Creek, From Line Between R9w And R10w To Mouth (Clark Fork River)	Waterbody Map	River	6.3	Miles	Impaired	TMDL completed
Willow Creek	MT76G002_061	Willow Creek, Headwaters To T4n R10w S30	Waterbody Map	River	6.1	Miles	Impaired	TMDL needed
Willow Creek	MT76G002_062	Willow Creek, T4n R10w S30 To Mouth (Mill Creek), T4n R10w S11	Waterbody Map	River	7.1	Miles	Impaired	TMDL completed
Woodson Gulch	MT76G004_100	Woodson Gulch, Headwaters To Mouth (Carpenter Creek), T11n R7w S29	Waterbody Map	River	.8	Miles	Impaired	Non-pollutant impairment

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Causes of Impairment for Reporting Year 2010

Montana, Upper Clark Fork

Description of this table

Cause of Impairment	Size of Assessed Waters with Listed Causes of Impairment
NOTE: Click on the underlined "Cause of Impairment" value to see a listing of those waters with that cause of impairment.
Cause of Impairment	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)
Aluminum	39.0
Low Flow Alterations	265.5
Physical Substrate Habitat Alterations	159.1
Cadmium	112.1	20.0
Chromium, Total	11.0
pH	4.7	20.0
Sulfates	19.1
Chlorophyll-A	16.1
Turbidity	5.2
Zinc	145.8	20.0
Arsenic	227.9	20.0
Cyanide	34.3
Lead	257.9	20.0
Phosphorus, Total	93.6
Copper	240.5	20.0
Nitrate/Nitrite (Nitrite + Nitrate as N)	84.1
Nitrates	29.2
Beryllium	5.4
Manganese	48.3
Silver	29.2
Iron	123.0
Nitrogen, Total	95.7
Other Anthropogenic Substrate Alterations	14.9
Selenium	12.9
Temperature, Water	7.1
Alteration in Stream-Side or Littoral Vegetative Covers	324.8
Mercury	7.2	20.0
Sedimentation/Siltation	303.7
Total Kjehldahl Nitrogen (TKN)	6.3

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Probable Sources Contributing to Impairments for Reporting Year 2010

Montana, Upper Clark Fork Watershed

Description of this table

Probable Source	Size of Assessed Waters with Probable Sources of Impairments
Probable Source	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)
Agriculture	224.6
Atmospheric Deposition - Toxics	7.1
Channelization	84.5
Contaminated Sediments	39.9
Dam Construction (Other Than Upstream Flood Control Projects)	7.1
Dredge Mining	11.5
Flow Alterations From Water Diversions	21.2
Forest Roads (Road Construction And Use)	32.8
Grazing In Riparian Or Shoreline Zones	149.0
Highway/Road/Bridge Runoff (Non-Construction Related)	52.0
Impacts From Abandoned Mine Lands (Inactive)	145.5	20.0
Irrigated Crop Production	103.2
Loss Of Riparian Habitat	29.2
Mill Tailings	131.5
Mine Tailings	31.2
Municipal Point Source Discharges	42.8
Natural Sources	6.1
Placer Mining	9.1
Rangeland Grazing	53.7
Silviculture Activities	15.8
Silviculture Harvesting	9.7
Site Clearance (Land Development Or Redevelopment)	34.1
Source Unknown	32.1
Streambank Modifications/Destabilization	19.6
Subsurface (Hardrock) Mining	4.7

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TMDL Alternatives by Cause of Impairment for Reporting Year 2010

Montana, Upper Clark Fork Watershed

No TMDL Alternatives reported.

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Cumulative TMDLs by Pollutant

Montana, Upper Clark Fork Watershed

This chart includes TMDLs since October 1, 1995.

Description of this table

Pollutant	Number of TMDLs Completed	Number of Causes of Impairment Addressed
NOTE: Click on the underlined "Number of TMDLs Completed" value to see a listing of those approved TMDLs for the pollutant.
Sediment	33	52
Lead	31	31
Copper	26	27
Arsenic	25	26
Cadmium	19	19
Zinc	17	17
Iron	15	15
Mercury	8	8
Phosphorus, Total	5	8
Nitrogen	4	10
Phosphorus	4	10
Cyanide	3	3
Selenium	2	2
Aluminum	1	1
Antimony	1	1
Beryllium	1	1
Fluoride	1	1
Nickel	1	1
Nitrite/Nitrate	1	1
Nitrogen, Total	1	1
Noxious Aquatic Plants	1	1
Temperature	1	1
Total Dissolved Solids (TDS)	1	1

Total: 202 TMDLs; 0 Causes of Impairment

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Montana, Upper Clark Fork Watershed

Features

Assessment Summary for Reporting Year 2010Montana, Upper Clark Fork Watershed

Causes of Impairment for Reporting Year 2010

Montana, Upper Clark Fork

Probable Sources Contributing to Impairments for Reporting Year 2010

Montana, Upper Clark Fork Watershed

TMDL Alternatives by Cause of Impairment for Reporting Year 2010

Montana, Upper Clark Fork Watershed

Cumulative TMDLs by Pollutant

Montana, Upper Clark Fork Watershed

Assessment Summary for Reporting Year 2010
Montana, Upper Clark Fork Watershed