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State: Montana
Waterbody ID: MT41D004_120
Location: ROCK CREEK, headwaters to mouth (Big Hole River)
State Waterbody Type: River
EPA Waterbody Type: Rivers and Streams
Water Size: 20.5
Units: miles
Watershed Name: Big Hole
On This Page
- Water Quality Assessment Status
- Causes of Impairment
- Probable Sources Contributing to Impairments
- TMDLs That Apply to This Waterbody
- Previous Causes of Impairment Now Attaining All Uses
State: Montana
Waterbody ID: MT41D004_120
Location: ROCK CREEK, headwaters to mouth (Big Hole River)
State Waterbody Type: River
EPA Waterbody Type: Rivers and Streams
Water Size: 20.5
Units: miles
Watershed Name: Big Hole
Data are also available for these years: 2012 2010 2006 2004 2002
2008 Waterbody Report for Rock Creek
Click on the waterbody for an interactive map
Features
- About This Database (Integrated Report)
- Assessing Water Quality (Questions and Answers)
- Integrated Reporting Guidance
- Previous National Water Quality Reports
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- AskWATERS
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- Assessment Database
- Statewide Statistical Surveys
- How's My Waterway Local Search tool
- Pollution Categories Summary Document
Water Quality Assessment Status for Reporting Year 2008
The overall status of this waterbody is Impaired.
Description of this table
| Designated Use | Designated Use Group | Status |
|---|---|---|
| Agricultural | Agricultural | Good |
| Aquatic Life | Fish, Shellfish, And Wildlife Protection And Propagation | Impaired |
| Cold Water Fishery | Fish, Shellfish, And Wildlife Protection And Propagation | Impaired |
| Drinking Water | Public Water Supply | Good |
| Industrial | Industrial | Good |
| Primary Contact Recreation | Recreation | Good |
Causes of Impairment for Reporting Year 2008
Description of this table
| Cause of Impairment | Cause of Impairment Group | Designated Use(s) | State TMDL Development Status |
|---|---|---|---|
| Alteration in Stream-Side or Littoral Vegetative Covers | Habitat Alterations | Aquatic Life, Cold Water Fishery | Non-pollutant impairment |
| Low Flow Alterations | Flow Alteration(s) | Aquatic Life, Cold Water Fishery | Non-pollutant impairment |
| Nitrogen, Total | Nutrients | Cold Water Fishery, Aquatic Life | TMDL needed |
| Phosphorus, Total | Nutrients | Cold Water Fishery, Aquatic Life | TMDL needed |
| Physical Substrate Habitat Alterations | Habitat Alterations | Cold Water Fishery, Aquatic Life | Non-pollutant impairment |
| Sedimentation/Siltation | Sediment | Cold Water Fishery, Aquatic Life | TMDL needed |
Probable Sources Contributing to Impairment for Reporting Year 2008
Description of this table
| Probable Source | Probable Source Group | Cause(s) of Impairment |
|---|---|---|
| Agriculture | Agriculture | Alteration in Stream-Side or Littoral Vegetative Covers; Nitrogen, Total; Phosphorus, Total; Physical Substrate Habitat Alterations; Sedimentation/Siltation |
| Grazing In Riparian Or Shoreline Zones | Agriculture | Alteration in Stream-Side or Littoral Vegetative Covers; Nitrogen, Total; Phosphorus, Total; Physical Substrate Habitat Alterations; Sedimentation/Siltation |
| Impacts From Hydrostructure Flow Regulation/Modification | Hydromodification | Low Flow Alterations |
| Irrigated Crop Production | Agriculture | Low Flow Alterations |
| Loss Of Riparian Habitat | Habitat Alterations (Not Directly Related To Hydromodification) | Alteration in Stream-Side or Littoral Vegetative Covers; Physical Substrate Habitat Alterations; Sedimentation/Siltation |
TMDLs That Apply to this waterbody
Description of this table
| TMDL Document Name | TMDL Date | TMDL Pollutant Description | TMDL Pollutant Source Type | Cause(s) of Impairment Addressed |
|---|---|---|---|---|
| Rock Creek (Headwaters To Mouth At Big Hole River) - Upper/North Fork Big Hole Tmdl Planning Area | Jun-30-2009 | Sediment | Nonpoint Source | Sedimentation/Siltation; Siltation |
Previous Causes of Impairments Now Attaining All Uses
No causes of impairment are recorded as attaining all uses for this waterbody.