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- Assessment Summary
- Causes of Impairment
- Probable Sources Contributing to Impairment
- TMDL Alternatives by Cause of Impairment
- Cumulative TMDLs by Pollutant
South Dakota State Report
Other states that contain this watershed:
North Dakota, Grand Watershed
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South Dakota, Grand Watershed
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Assessment Summary for Reporting Year 2006
South Dakota, Grand Watershed
Description of this table
| 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 |
|---|---|---|---|---|---|---|---|---|
| Flat Creek Dam | SD-GR-L-FLAT_CREEK_01 | Perkins County | Waterbody Map | Freshwater Reservoir | 151.4 | Acres | Impaired | TMDL needed |
| Grand River | SD-GR-R-GRAND_01 | Shadehill Reservoir To Corson County Line | Waterbody Map | River | 18.7 | Miles | Impaired | TMDL needed |
| Grand River | SD-GR-R-GRAND_02 | Corson County Line To Bullhead | Waterbody Map | River | 96.0 | Miles | Impaired | TMDL needed |
| Grand River | SD-GR-R-GRAND_03 | Bullhead To Mouth | Waterbody Map | River | 50.2 | Miles | Impaired | TMDL needed |
| Lake Isabel | SD-GR-L-ISABEL_01 | Dewey County | Waterbody Map | Freshwater Reservoir | 112.6 | Acres | Impaired | TMDL needed |
Causes of Impairment for Reporting Year 2006
South Dakota, Grand
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) |
||||||||||||||
| pH | 18.7 | ||||||||||||||
| Salinity | 164.9 | ||||||||||||||
| Fecal Coliform | 50.2 | ||||||||||||||
| Trophic State Index (TSI) | 264.0 | ||||||||||||||
| Temperature, Water | 50.2 | ||||||||||||||
| Total Suspended Solids (TSS) | 146.3 | ||||||||||||||
| Mercury | 112.6 | ||||||||||||||
Probable Sources Contributing to Impairments for Reporting Year 2006
South Dakota, Grand 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) |
||||||||||||||
| Crop Production (Crop Land Or Dry Land) | 50.2 | ||||||||||||||
| Grazing In Riparian Or Shoreline Zones | 50.2 | ||||||||||||||
| Livestock (Grazing Or Feeding Operations) | 50.2 | ||||||||||||||
| Natural Sources | 68.9 | ||||||||||||||
| Non-Point Source | 264.0 | ||||||||||||||
| Source Unknown | 114.7 | 112.6 | |||||||||||||
TMDL Alternatives by Cause of Impairment for Reporting Year 2006
South Dakota, Grand Watershed
No TMDL Alternatives reported.
Cumulative TMDLs by Pollutant
No TMDL data have been reported to EPA for this watershed.
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