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Montana State Report

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Water Quality Data Available for this Watershed

Montana, Lower Yellowstone-Sunday Watershed


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Features

Assessment Summary for Reporting Year 2010
Montana, Lower Yellowstone-Sunday Watershed

Description of this table
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
Custer Creek MT42K002_010 Custer Creek, Headwaters To Mouth (Yellowstone River) Waterbody Map River 45.6 Miles Good  
Deadman Creek MT42K002_060 Deadman Creek, Headwaters To Mouth (North Fork Sunday Creek) Waterbody Map River 17.3 Miles Impaired TMDL needed
East Fork Armells Creek MT42K002_110 East Fork Armells Creek, Colstrip To Mouth (Armells Creek) Waterbody Map River 32.4 Miles Impaired TMDL needed
East Fork Armells Creek MT42K002_170 East Fork Armells Creek, Headwaters To Colstrip Waterbody Map River 24.7 Miles Impaired Non-pollutant impairment
East Fork Sarpy Creek MT42K002_100 East Fork Sarpy Creek, Headwaters To Mouth (Sarpy Creek) Waterbody Map River 32.5 Miles Good  
Harris Creek MT42K002_020 Harris Creek, Headwaters To Mouth (Yellowstone River) Waterbody Map River 27.4 Miles Impaired TMDL needed
Little Porcupine Creek MT42K002_160 Little Porcupine Creek, Headwaters To Mouth (Yellowstone River) Waterbody Map River 118.8 Miles Impaired TMDL needed
Muster Creek MT42K002_040 Muster Creek, Headwaters To Mouth (Yellowstone River) Waterbody Map River 31.4 Miles Impaired TMDL needed
North Fork Sunday Creek MT42K002_080 North Fork Sunday Creek, Custer/Rosebud County Border To Mouth (Sunday Creek) Waterbody Map River 33.8 Miles Impaired TMDL needed
Reservation Creek MT42K002_140 Reservation Creek, Headwaters To Mouth (Yellowstone River) Waterbody Map River 29.4 Miles Not_Assessed  
Sand Creek MT42K002_050 Sand Creek, Headwaters To Mouth (Yellowstone River) Waterbody Map River 37.7 Miles Not_Assessed  
Sarpy Creek MT42K002_090 Sarpy Creek, Crow Indian Reservation Boundary To Mouth (Yellowstone River) Waterbody Map River 89.4 Miles Impaired TMDL needed
Smith Creek MT42K002_150 Smith Creek, Headwaters To Mouth (Yellowstone River) Waterbody Map River 16.1 Miles Not_Assessed  
Starved To Death Creek MT42K002_130 Starved To Death Creek, Headwaters To Mouth (Yellowstone River) Waterbody Map River 22.7 Miles Not_Assessed  
Stellar Creek MT42K002_070 Stellar Creek, Headwaters To Mouth (Little Porcupine Creek) Waterbody Map River 43.0 Miles Impaired TMDL needed
Sunday Creek MT42K002_030 Sunday Creek, The North And South Forks To Mouth (Yellowstone River) Waterbody Map River 15.3 Miles Impaired TMDL needed
West Fork Armells Creek MT42K002_120 West Fork Armells Creek, Headwaters To Mouth (Armells Creek) Waterbody Map River 34.0 Miles Good  
Yellowstone River MT42K001_010 Yellowstone River, The Cartersville Diversion Dam To Powder River Waterbody Map River 88.7 Miles Impaired TMDL needed
Yellowstone River MT42K001_020 Yellowstone River, The Big Horn To Cartersville Diversion Dam Waterbody Map River 59.5 Miles Impaired Non-pollutant impairment

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Causes of Impairment for Reporting Year 2010

Montana, Lower Yellowstone-Sunday

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)
Physical Substrate Habitat Alterations 15.3
Cadmium 43.0
pH 131.7
Chlorophyll-A 235.8
Other Flow Regime Alterations 58.8
Specific Conductivity 66.1
Zinc 88.7
Lead 104.0
Phosphorus, Total 342.5
Copper 104.0
Nitrate/Nitrite (Nitrite + Nitrate as N) 375.9
Sodium 33.8
Fish Passage Barrier 59.5
Iron 15.3
Nitrogen, Total 104.6
Solids (Suspended/Bedload) 181.3
Alteration in Stream-Side or Littoral Vegetative Covers 113.4
Sedimentation/Siltation 33.8
Total Dissolved Solids (TDS) 273.7
Total Kjehldahl Nitrogen (TKN) 273.1

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Probable Sources Contributing to Impairments for Reporting Year 2010

Montana, Lower Yellowstone-Sunday Watershed

Description of this table
Probable Source Size of Assessed Waters with Probable Sources of Impairments
Rivers and
Streams (Miles)
Agriculture 121.1
Channelization 33.8
Coal Mining 32.4
Crop Production (Crop Land Or Dry Land) 33.8
Dam Construction (Other Than Upstream Flood Control Projects) 59.5
Grazing In Riparian Or Shoreline Zones 116.7
Irrigated Crop Production 135.4
Livestock (Grazing Or Feeding Operations) 27.4
Municipal Point Source Discharges 88.7
Natural Sources 165.2
Non-Irrigated Crop Production 104.6
Post-Development Erosion And Sedimentation 88.7
Rangeland Grazing 265.8
Source Unknown 283.1
Streambank Modifications/Destabilization 88.7
Surface Mining 24.7
Transfer Of Water From An Outside Watershed 91.1

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TMDL Alternatives by Cause of Impairment for Reporting Year 2010


Montana, Lower Yellowstone-Sunday Watershed


No TMDL Alternatives reported.

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Cumulative TMDLs by Pollutant


No TMDL data have been reported to EPA for this watershed.

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