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On This Page
- Assessment Summary
- Causes of Impairment
- Probable Sources Contributing to Impairment
- TMDL Alternatives by Cause of Impairment
- Cumulative TMDLs by Pollutant
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Montana, Upper Yellowstone-Lake Basin Watershed
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Assessment Summary for Reporting Year 2010
Montana, Upper Yellowstone-Lake Basin Watershed
Description of this table
Click here to list Threatened and Impaired Waters Only
Click here to list Threatened and Impaired Waters Only
| NOTE: Click on the underlined "Waterbody Name" to view a Waterbody report. | ||||||||
| Waterbody Name | Waterbody ID | Location | Map | Waterbody Type | Size | Units | Status | State TMDL Development Status |
|---|---|---|---|---|---|---|---|---|
| Big Lake | MT43F003_010 | Big Lake | Waterbody Map | Freshwater Lake | 2,806.0 | Acres | Impaired | TMDL needed |
| Canyon Creek | MT43F002_021 | Canyon Creek, Highway 532 To Mouth (Yellowstone River) | Waterbody Map | River | 19.6 | Miles | Impaired | Non-pollutant impairment |
| Canyon Creek | MT43F002_022 | Canyon Creek, Headwaters To Highway 532 | Waterbody Map | River | 29.7 | Miles | Impaired | TMDL needed |
| Duck Creek | MT43F002_010 | Duck Creek, Headwaters To Mouth (Yellowstone River) | Waterbody Map | River | 14.1 | Miles | Impaired | TMDL needed |
| Hailstone Lake | MT43F003_020 | Hailstone Lake, T3n R20e S13 | Waterbody Map | Freshwater Lake | 538.0 | Acres | Impaired | TMDL needed |
| Halfbreed Lake | MT43F003_030 | Halfbreed Lake, T3n R21e S33 | Waterbody Map | Freshwater Lake | 278.0 | Acres | Impaired | TMDL needed |
| Keyser Creek | MT43F002_030 | Keyser Creek, Headwaters To Mouth (Yellowstone River) | Waterbody Map | River | 22.4 | Miles | Good | |
| Valley Creek | MT43F002_040 | Valley Creek, Headwaters To Mouth (Yellowstone River) | Waterbody Map | River | 14.8 | Miles | Impaired | TMDL needed |
| Yellowstone River | MT43F001_011 | Yellowstone River, City Of Laurel Pws To City Of Billings Pws | Waterbody Map | River | 19.7 | Miles | Impaired | TMDL needed |
| Yellowstone River | MT43F001_012 | Yellowstone River, Bridger Creek To City Of Laurel Pws | Waterbody Map | River | 55.8 | Miles | Good | |
Causes of Impairment for Reporting Year 2010
Montana, Upper Yellowstone-Lake Basin
Description of this table| NOTE: Click on the underlined "Cause of Impairment" value to see a listing of those waters with that cause of impairment. | |||||||||||||||
| Cause of Impairment | Size of Assessed Waters with Listed Causes of Impairment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
||||||||||||||
| Low Flow Alterations | 43.8 | ||||||||||||||
| Physical Substrate Habitat Alterations | 19.7 | ||||||||||||||
| Salinity | 3,622.0 | ||||||||||||||
| Chlorophyll-A | 19.7 | ||||||||||||||
| Other Flow Regime Alterations | 34.4 | ||||||||||||||
| Cause Unknown | 19.7 | ||||||||||||||
| Nitrate/Nitrite (Nitrite + Nitrate as N) | 19.7 | ||||||||||||||
| Dissolved Oxygen | 44.5 | ||||||||||||||
| Other Anthropogenic Substrate Alterations | 19.7 | ||||||||||||||
| Alteration in Stream-Side or Littoral Vegetative Covers | 58.6 | ||||||||||||||
| Benthic Macroinvertebrates Bioassessments | 14.8 | ||||||||||||||
| Sedimentation/Siltation | 58.6 | ||||||||||||||
Probable Sources Contributing to Impairments for Reporting Year 2010
Montana, Upper Yellowstone-Lake Basin Watershed
Description of this table| Probable Source | Size of Assessed Waters with Probable Sources of Impairments | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
||||||||||||||
| Agriculture | 44.5 | 3,622.0 | |||||||||||||
| Channelization | 78.3 | ||||||||||||||
| Crop Production (Crop Land Or Dry Land) | 19.7 | ||||||||||||||
| Drought-Related Impacts | 58.6 | ||||||||||||||
| Flow Alterations From Water Diversions | 19.6 | ||||||||||||||
| Grazing In Riparian Or Shoreline Zones | 14.1 | ||||||||||||||
| Irrigated Crop Production | 14.8 | ||||||||||||||
| Loss Of Riparian Habitat | 14.8 | ||||||||||||||
| Municipal Point Source Discharges | 19.7 | ||||||||||||||
| Streambank Modifications/Destabilization | 19.7 | ||||||||||||||
TMDL Alternatives by Cause of Impairment for Reporting Year 2010
Montana, Upper Yellowstone-Lake Basin Watershed
No TMDL Alternatives reported.
Cumulative TMDLs by Pollutant
No TMDL data have been reported to EPA for this watershed.
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