District Projects Listed on State Section 303(d) Lists as of January 1, 2012
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Waterbody
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Listing Agency
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Impaired Use
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Parameters of Concern
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TMDL Status
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Colorado:
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Bear Creek Reservoir
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CO Dept. of Public Health and Environment
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Aquatic Life - Cold
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Chlorophyll-a
Phosphorus
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To Be Developed(2)
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Dissolved Oxygen(1)
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To Be Monitored
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Cherry Creek Reservoir
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CO Dept. of Public Health and Environment
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Aquatic Life - Warm
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Dissolved Oxygen(1)
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To Be Monitored
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Iowa:
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Missouri River (From water supply intake at Council Bluffs, IA to Boyer River)
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IA Dept. of Natural Resources
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Drinking Water Supply
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Arsenic
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To Be Developed
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Montana:
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Fort Peck Reservoir (Fort Peck Lake)
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MT Dept. of Environmental Quality
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Drinking Water Supply
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Lead, Mercury
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To Be Developed
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Recreation
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Aquatic Plants - Native
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NA(3)
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Missouri River (Fort Peck Dam to the Milk River)
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MT Dept. of Environmental Quality
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Aquatic Life Cold Water Fishery
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Water Temperature
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To Be Developed
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Degraded Riparian Conditions
Other Flow Regime Alterations
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NA(3)
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Missouri River (Milk River to the Poplar River)
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MT Dept. of Environmental Quality
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Aquatic Life Warm Water Fishery
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Water Temperature
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To Be Developed
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Degraded Riparian Conditions
Other Flow Regime Alterations
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NA(3)
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Missouri River (Poplar River to Montana-North Dakota Stateline)
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MT Dept. of Environmental Quality
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Aquatic Life Warm Water Fishery
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Water Temperature
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To Be Developed
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Other Flow Regime Alterations
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NA(3)
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Nebraska:
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Bluestem Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life, Aesthetics
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus)
Sediment
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To Be Developed
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Branched Oak Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus)
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To Be Developed
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Conestoga Reservoir
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NE Dept. of Environmental Quality
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Recreation, Aquatic Life, Aesthetics
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Algae Toxins
Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus)
Sediment
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To Be Developed
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East Twin Reservoir
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NE Dept. of Environmental Quality
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Aesthetics
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus)
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To Be Developed
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Ed Zorinsky Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus)
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Completed (Sep-2002)
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Hazard Index Compounds (Mercury – Fish Tissue)
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To Be Developed
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Gavins Point Reservoir (Lewis and Clark Lake)
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NE Dept. of Environmental Quality
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Aquatic Life
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus)
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To Be Developed
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Glenn Cunningham Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus)
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Lake Recently Renovated(4)
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Holmes Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus)
High pH
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Lake Recently Renovated(4)
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Missouri River (Big Sioux River to Platte River)
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NE Dept. of Environmental Quality
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Aquatic Life
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Cancer Risk and Hazard Index Compounds (Dieldrin and PCBs in fish tissue)
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To Be Developed
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Missouri River (Platte River to Nebraska-Kansas Stateline)
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NE Dept. of Environmental Quality
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Aquatic Life
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Cancer Risk and Hazard Index Compounds (Dieldrin and PCBs in fish tissue)
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To Be Developed
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Recreation
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Bacteria (E. coli)
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Completed (Sep-2007)
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Olive Creek Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus)
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Completed (Sep-2002)
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Ammonia, Arsenic, High pH, Low Dissolved Oxygen
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To Be Developed
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Pawnee Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life, Recreation, Aesthetics
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus),
Algae Toxins, Arsenic, Sediment
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To Be Developed
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Stagecoach Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life, Aesthetics
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus),
Sediment
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To Be Developed
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Standing Bear Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus),
Sediment
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Completed (Jul-2003)
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Hazard Index Compounds (Mercury – Fish Tissue)
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To Be Developed
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Wagon Train Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus)
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Lake Recently Renovated(4)
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Hazard Index Compounds (Mercury – Fish Tissue)
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To Be Developed
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Wehrspann Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus),
Hazard Index Compounds (Mercury – Fish Tissue)
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To Be Developed
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West Twin Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life
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Nutrients (Chlorophyll-a, Total Nitrogen, Total Phosphorus),
Ammonia
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To Be Developed
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Yankee Hill Reservoir
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NE Dept. of Environmental Quality
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Aquatic Life
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High pH
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Lake Recently Renovated(4)
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North Dakota:
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Garrison Reservoir (Lake Sakakawea)
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ND Dept. of Health
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Fish Consumption
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Methyl-Mercury
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To Be Developed
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Pipestem Reservoir
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ND Dept. of Health
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Recreation
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Nutrients/Eutrophication, Biological Indicators
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To Be Developed
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South Dakota:
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Big Bend Reservoir (Lake Sharpe)
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SD Dept. of Environment and Natural Resources
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Coldwater Permanent Fish Life
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Accumulated Sediment
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Completed (Feb-2001)
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Water Temperature
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To Be Developed
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Cold Brook Reservoir
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SD Dept. of Environment and Natural Resources
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Coldwater Permanent Fish Life
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Water Temperature
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To Be Developed
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Lake Pocasse
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SD Dept. of Environment and Natural Resources
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Immersion Recreation
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E. coli, Chlorophyll-a
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To Be Developed
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Limited Contact Recreation
Warmwater Permanent Fish Life
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Chlorophyll-a
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(1) Identified on Colorado’s Monitoring and Evaluation List. Water quality problem suspected, but uncertainty exists based on the available data.
(2) A phased Total Maximum Annual Load (TMAL) has been developed. A TMDL is to be developed.
(3) Impairment identified in Montana’s integrated water quality report, but not on 303(d) list for development of a TMDL.
(4) Category 4R – Waterbody data exceeds the impairment threshold however a TMDL may not be needed. The category will only be used for nutrient assessments in new or renovated lakes and reservoirs. Newly filled reservoirs usually go through a period of trophic instability – a trophic upsurge followed by the trophic decline. Erroneous water quality assessments are likely to occur during this period. To account for this, all new or renovated reservoirs will be placed in this category for a period not to exceed eight years following the fill or re-fill process. After the eighth year monitoring data will be assessed and the waterbody will be appropriately placed into category 1, 2, or 5.
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