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State: Montana
Waterbody ID: MT41E002_080
Location: LITTLE BOULDER RIVER, North Fork to mouth (Boulder River)
State Waterbody Type: River
EPA Waterbody Type: Rivers and Streams
Water Size: 3.76
Units: miles
Watershed Name: Boulder
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: MT41E002_080
Location: LITTLE BOULDER RIVER, North Fork to mouth (Boulder River)
State Waterbody Type: River
EPA Waterbody Type: Rivers and Streams
Water Size: 3.76
Units: miles
Watershed Name: Boulder
Data are also available for these years: 2012 2008 2006 2004 2002 2000
2010 Waterbody Report for Little Boulder River
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
- EnviroMapper for Water
- AskWATERS
- EPA WATERS Homepage
- Exchange Network
- Assessment Database
- Statewide Statistical Surveys
- How's My Waterway Local Search tool
- Pollution Categories Summary Document
Water Quality Assessment Status for Reporting Year 2010
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 Fishes | Fish, Shellfish, And Wildlife Protection And Propagation | Impaired |
| Drinking Water | Public Water Supply | Good |
| Industrial | Industrial | Good |
| Primary Contact Recreation | Recreation | Impaired |
Causes of Impairment for Reporting Year 2010
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 | Cold Water Fishes, Aquatic Life | Non-pollutant impairment |
| Cause Unknown | Cause Unknown | Primary Contact Recreation | Non-pollutant impairment |
| Copper | Metals (other than Mercury) | Cold Water Fishes, Aquatic Life | TMDL needed |
| Physical Substrate Habitat Alterations | Habitat Alterations | Cold Water Fishes, Aquatic Life | Non-pollutant impairment |
| Zinc | Metals (other than Mercury) | Aquatic Life, Cold Water Fishes | TMDL needed |
Probable Sources Contributing to Impairment for Reporting Year 2010
Description of this table
| Probable Source | Probable Source Group | Cause(s) of Impairment |
|---|---|---|
| Agriculture | Agriculture | Alteration in Stream-Side or Littoral Vegetative Covers |
| Dredge Mining | Resource Extraction | Copper; Physical Substrate Habitat Alterations; Zinc |
| Highways, Roads, Bridges, Infrastructure (New Construction) | Construction | Alteration in Stream-Side or Littoral Vegetative Covers |
| Impacts From Abandoned Mine Lands (Inactive) | Resource Extraction | Alteration in Stream-Side or Littoral Vegetative Covers; Copper; Physical Substrate Habitat Alterations; Zinc |
| Source Unknown | Unknown | Cause Unknown |
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 |
|---|---|---|---|---|
| Little Boulder River, Headwaters To Mouth (Boulder River) - Boulder-Elkhorn Metals Tpa | Dec-20-2012 | Aluminum | Point Source | Copper; Unlisted but Impaired; Cause Unknown; Metals (other than Mercury) |
| Little Boulder River, Headwaters To Mouth (Boulder River) - Boulder-Elkhorn Metals Tpa | Dec-20-2012 | Copper | Point Source | Metals (other than Mercury); Cause Unknown; Copper; Unlisted but Impaired |
| Little Boulder River, Headwaters To Mouth (Boulder River) - Boulder-Elkhorn Metals Tpa | Dec-20-2012 | Iron | Point/Nonpoint Source | Cause Unknown; Metals (other than Mercury); Unlisted but Impaired; Copper |
| Little Boulder River, Headwaters To Mouth (Boulder River) - Boulder-Elkhorn Metals Tpa | Dec-20-2012 | Lead | Point Source | Copper; Metals (other than Mercury); Cause Unknown; Unlisted but Impaired |
Previous Causes of Impairments Now Attaining All Uses
No causes of impairment are recorded as attaining all uses for this waterbody.