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Assessment Data for the State of Nebraska Year 2004

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The 2004 National Assessment
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Total Assessed Waters for the State of Nebraska

Description of this table

Size Of Water
Rivers, Streams, Creeks (Miles) Lakes, Ponds, Reservoir (Acres) Bays, Estuaries (Square Miles) Coastal Shorelines (Miles) Oceans, Near Coastal Waters (Square Miles) Wetlands (Acres) Great Lakes Shoreline (Miles) Great Lakes Open Water (Square Miles) Inland Lake Shoreline (Miles)
Total Assessed Waters 7,155.83 135,495.10 .00 .00 .00 .00 .00 .00 .00
Estimated Total Water Size in NE 81,573.00 280,000.00 Unavailable Unavailable Unavailable Unavailable Unavailable Unavailable Unavailable
Percent of Waters Assessed 8.77 48.39 Unavailable Unavailable Unavailable Unavailable Unavailable Unavailable Unavailable

Assessed Waters of Nebraska by Watershed (8 Digit USGS Cataloging Unit)

Description of this table
Watershed Size of Water
Rivers, Streams, Creeks (Miles) Lakes, Ponds, Reservoir (Acres) Bays, Estuaries (Square Miles) Coastal Shorelines (Miles) Oceans, Near Coastal Waters (Square Miles) Wetlands (Acres) Great Lakes Shoreline (Miles) Great Lakes Open Water (Square Miles) Inland Lake Shoreline (Miles)
8-digit HUC Name Not Reported 61.60 7,741.90 .00 .00 .00 .00 .00 .00 .00
BEAVER 181.10 .00 .00 .00 .00 .00 .00 .00 .00
BIG NEMAHA 174.00 160.00 .00 .00 .00 .00 .00 .00 .00
BIG PAPILLION-MOSQUITO 191.90 1,325.00 .00 .00 .00 .00 .00 .00 .00
BLACKBIRD-SOLDIER 157.70 135.00 .00 .00 .00 .00 .00 .00 .00
CALAMUS 26.10 5,576.00 .00 .00 .00 .00 .00 .00 .00
CEDAR 89.30 94.00 .00 .00 .00 .00 .00 .00 .00
DISMAL 84.90 .00 .00 .00 .00 .00 .00 .00 .00
FRENCHMAN 119.20 1,707.00 .00 .00 .00 .00 .00 .00 .00
HARLAN COUNTY RESERVOIR 169.72 13,500.00 .00 .00 .00 .00 .00 .00 .00
HAT 1.90 35.00 .00 .00 .00 .00 .00 .00 .00
HORSE 9.50 .00 .00 .00 .00 .00 .00 .00 .00
KEG-WEEPING WATER 128.10 .00 .00 .00 .00 .00 .00 .00 .00
KEYA PAHA 53.06 .00 .00 .00 .00 .00 .00 .00 .00
LEWIS AND CLARK LAKE 186.00 30,040.00 .00 .00 .00 .00 .00 .00 .00
LITTLE NEMAHA 95.05 .00 .00 .00 .00 .00 .00 .00 .00
LOGAN 113.20 .00 .00 .00 .00 .00 .00 .00 .00
LOUP 160.30 .00 .00 .00 .00 .00 .00 .00 .00
LOWER BIG BLUE 72.70 .00 .00 .00 .00 .00 .00 .00 .00
LOWER ELKHORN 282.10 96.00 .00 .00 .00 .00 .00 .00 .00
LOWER LITTLE BLUE 39.40 .00 .00 .00 .00 .00 .00 .00 .00
LOWER LODGEPOLE 11.10 350.00 .00 .00 .00 .00 .00 .00 .00
LOWER MIDDLE LOUP 162.40 2,845.00 .00 .00 .00 .00 .00 .00 .00
LOWER NIOBRARA 182.11 35.00 .00 .00 .00 .00 .00 .00 .00
LOWER NORTH LOUP 154.50 .00 .00 .00 .00 .00 .00 .00 .00
LOWER NORTH PLATTE 180.45 35,435.00 .00 .00 .00 .00 .00 .00 .00
LOWER PLATTE 104.50 6.20 .00 .00 .00 .00 .00 .00 .00
LOWER PLATTE-SHELL 132.70 .00 .00 .00 .00 .00 .00 .00 .00
LOWER SAPPA 71.00 .00 .00 .00 .00 .00 .00 .00 .00
LOWER SOUTH PLATTE 110.30 4,600.00 .00 .00 .00 .00 .00 .00 .00
MEDICINE 39.40 1,900.00 .00 .00 .00 .00 .00 .00 .00
MIDDLE BIG BLUE 305.70 325.00 .00 .00 .00 .00 .00 .00 .00
MIDDLE NIOBRARA 297.04 4,080.00 .00 .00 .00 .00 .00 .00 .00
MIDDLE NORTH PLATTE-SCOTTS BLUFF 202.39 3,992.00 .00 .00 .00 .00 .00 .00 .00
MIDDLE PLATTE-BUFFALO 280.80 6,823.00 .00 .00 .00 .00 .00 .00 .00
MIDDLE PLATTE-PRAIRIE 149.20 .00 .00 .00 .00 .00 .00 .00 .00
MIDDLE REPUBLICAN 106.65 .00 .00 .00 .00 .00 .00 .00 .00
MUD 31.30 .00 .00 .00 .00 .00 .00 .00 .00
NIOBRARA HEADWATERS 136.02 1,600.00 .00 .00 .00 .00 .00 .00 .00
NORTH FORK ELKHORN 45.40 700.00 .00 .00 .00 .00 .00 .00 .00
NORTH FORK REPUBLICAN 76.50 .00 .00 .00 .00 .00 .00 .00 .00
PONCA 72.69 .00 .00 .00 .00 .00 .00 .00 .00
PRAIRIE DOG 16.67 .00 .00 .00 .00 .00 .00 .00 .00
PUMPKIN 12.90 .00 .00 .00 .00 .00 .00 .00 .00
RED WILLOW 55.70 1,628.00 .00 .00 .00 .00 .00 .00 .00
SALT 381.20 4,446.00 .00 .00 .00 .00 .00 .00 .00
SNAKE 94.52 3,195.00 .00 .00 .00 .00 .00 .00 .00
SOUTH FORK BIG NEMAHA 47.30 235.00 .00 .00 .00 .00 .00 .00 .00
SOUTH FORK REPUBLICAN 4.40 .00 .00 .00 .00 .00 .00 .00 .00
SOUTH LOUP 107.70 .00 .00 .00 .00 .00 .00 .00 .00
STINKING WATER 91.27 .00 .00 .00 .00 .00 .00 .00 .00
TARKIO-WOLF 105.70 .00 .00 .00 .00 .00 .00 .00 .00
TURKEY 131.20 111.00 .00 .00 .00 .00 .00 .00 .00
UPPER BIG BLUE 199.60 .00 .00 .00 .00 .00 .00 .00 .00
UPPER ELKHORN 173.40 844.00 .00 .00 .00 .00 .00 .00 .00
UPPER LITTLE BLUE 250.10 93.00 .00 .00 .00 .00 .00 .00 .00
UPPER LODGEPOLE 11.10 .00 .00 .00 .00 .00 .00 .00 .00
UPPER MIDDLE LOUP 51.20 375.00 .00 .00 .00 .00 .00 .00 .00
UPPER NIOBRARA 170.07 469.00 .00 .00 .00 .00 .00 .00 .00
UPPER NORTH LOUP 197.40 .00 .00 .00 .00 .00 .00 .00 .00
UPPER REPUBLICAN 152.95 .00 .00 .00 .00 .00 .00 .00 .00
UPPER WHITE 155.24 943.00 .00 .00 .00 .00 .00 .00 .00
WEST FORK BIG BLUE 211.60 55.00 .00 .00 .00 .00 .00 .00 .00
WOOD 116.90 .00 .00 .00 .00 .00 .00 .00 .00


Nebraska Assessed Waters
Individual Use Support for Rivers and Streams

Description of this table
State Designated Use Total Miles Assessed Percent Good Percent Threatened Percent Impaired color.gif% Good
color.gif% Threatened
color.gif% Impaired
AGRICULTURAL WATER SUPPLY-CLASS A 4,441.20 100.00 .00 .00 color.gif
AGRICULTURAL WATER SUPPLY-CLASS B 20.00 100.00 .00 .00 color.gif
COLD WATER AQUATIC LIFE (CLASS A) 190.30 80.66 .00 19.34 color.gifcolor.gif
COLD WATER AQUATIC LIFE (CLASS B) 1,329.48 59.04 .00 40.96 color.gifcolor.gif
FISH CONSUMPTION 1,807.94 59.45 .00 40.55 color.gifcolor.gif
PRIMARY CONTACT RECREATION 3,013.50 24.80 .00 75.20 color.gifcolor.gif
PUBLIC DRINKING WATER SUPPLY 589.89 100.00 .00 .00 color.gif
WARM WATER AQUATIC LIFE (CLASS A) 3,605.22 70.65 .00 29.35 color.gifcolor.gif
WARM WATER AQUATIC LIFE (CLASS B) 1,919.29 76.83 .00 23.17 color.gifcolor.gif
The state assessed 7,155.83 miles of rivers and streams, or 8.77% of 81,573.00 total miles.

Nebraska Assessed Waters
Water Quality Attainment for Rivers and Streams

Description of this table
Attainment Status Miles Percent of Assessed
Good 3,872.05 54.11
Threatened .00 .00
Impaired 3,283.78 45.89
Total Miles Assessed 7,155.83 100.00

Nebraska Top Causes of Impairments
for Rivers and Streams

Description of this table
# State Cause Name Total
Miles
Impaired
1 BACTERIA, ESCHERICHIA COLI 1,408.00
2 FECAL COLIFORM 1,219.00
3 POLYCHLORINATED BIPHENYLS 548.00
4 TEMPERATURE, WATER 522.70
5 DIELDRIN 475.90
6 SELENIUM 431.90
7 OXYGEN, DISSOLVED 216.77
8 MERCURY 144.10
9 PH 87.80
10 IRON 64.80

Nebraska Top Probable Sources of Impairments
for Rivers and Streams

Description of this table
# State Source Name Total Miles Impaired by Source
1 ANIMAL FEEDING OPERATIONS (NPS) 1,993.50
2 WILDLIFE OTHER THAN WATERFOWL 1,942.80
3 MUNICIPAL POINT SOURCE DISCHARGES 1,754.60
4 SOURCE UNKNOWN 1,390.28
5 NATURAL SOURCES 760.30
6 AGRICULTURE 415.10
7 CROP PRODUCTION (CROP LAND OR DRY LAND) 328.70
8 MUNICIPAL (URBANIZED HIGH DENSITY AREA) 206.50
9 STREAMBANK MODIFICATIONS/DESTABLIZATION 11.61
10 INDUSTRIAL POINT SOURCE DISCHARGE 6.10

Nebraska Assessed Waters
Individual Use Support for Lakes, Ponds and Reservoirs

Description of this table
State Designated Use Total Acres Assessed Percent Good Percent Threatened Percent Impaired color.gif% Good
color.gif% Threatened
color.gif% Impaired
AESTHETICS 92,866.10 68.70 .00 31.30 color.gifcolor.gif
AGRICULTURAL WATER SUPPLY-CLASS A 92,328.10 99.30 .00 .70 color.gifcolor.gif
COLD WATER AQUATIC LIFE (CLASS B) 35,753.00 98.08 .00 1.92 color.gifcolor.gif
FISH CONSUMPTION 88,006.00 90.94 .00 9.06 color.gifcolor.gif
INDUSTRIAL WATER SUPPLY 72,580.00 100.00 .00 .00 color.gif
PRIMARY CONTACT RECREATION 113,833.00 96.99 .00 3.01 color.gifcolor.gif
WARM WATER AQUATIC LIFE (CLASS A) 59,948.10 30.72 .00 69.28 color.gifcolor.gif
The state assessed 135,495.10 acres of lakes, ponds and reservoirs, or 48.39% of 280,000.00 total acres.

Nebraska Assessed Waters
Water Quality Attainment for Lakes, Ponds and Reservoirs

Description of this table
Attainment Status Acres Percent of Assessed
Good 93,271.40 68.84
Threatened .00 .00
Impaired 42,223.70 31.16
Total Acres Assessed 135,495.10 100.00

Nebraska Top Causes of Impairments
for Lakes, Ponds and Reservoirs

Description of this table
# State Cause Name Total
Acres
Impaired
1 NUTRIENT/EUTROPHICATION BIOLOGICAL INDICATORS 28,477.00
2 PH 5,350.70
3 MERCURY 4,583.00
4 FECAL COLIFORM 3,426.00
5 POLYCHLORINATED BIPHENYLS 3,300.00
6 OXYGEN, DISSOLVED 2,375.00
7 SEDIMENTATION/SILTATION 1,767.00
8 SPECIFIC CONDUCTANCE 649.00
9 PHOSPHORUS (TOTAL) 588.00
10 ATRAZINE 95.00

Nebraska Top Probable Sources of Impairments
for Lakes, Ponds and Reservoirs

Description of this table
# State Source Name Total Acres Impaired by Source
1 SOURCE UNKNOWN 35,789.70
2 NATURAL SOURCES 20,276.00
3 AGRICULTURE 3,431.00
4 HIGHWAYS, ROADS, BRIDGES, INFRASTURCTURE (NEW CONSTRUCTION) 648.00
5 MUNICIPAL (URBANIZED HIGH DENSITY AREA) 123.00

Nebraska

Causes of Impairment

Description of this table
State Cause Name Size of Assessed Waters with Listed Causes of Impairment
Rivers, Streams, Creeks (Miles) Lakes, Ponds, Reservoir (Acres) Bays, Estuaries (Square Miles) Coastal Shorelines (Miles) Oceans, Near Coastal Waters (Square Miles) Wetlands (Acres) Great Lakes Shoreline (Miles) Great Lakes Open Waters (Square Miles) Inland Lake Shoreline (Miles)
AMMONIA (UN-IONIZED) 6.10 .00 .00 .00 .00 .00 .00 .00 .00
ATRAZINE 56.40 95.00 .00 .00 .00 .00 .00 .00 .00
BACTERIA, ESCHERICHIA COLI 1,408.00 .00 .00 .00 .00 .00 .00 .00 .00
CARBON TETRACHLORIDE 5.50 .00 .00 .00 .00 .00 .00 .00 .00
DIELDRIN 475.90 .00 .00 .00 .00 .00 .00 .00 .00
FECAL COLIFORM 1,219.00 3,426.00 .00 .00 .00 .00 .00 .00 .00
IMPAIRMENT UNKNOWN 32.11 46.00 .00 .00 .00 .00 .00 .00 .00
IRON 64.80 .00 .00 .00 .00 .00 .00 .00 .00
MERCURY 144.10 4,583.00 .00 .00 .00 .00 .00 .00 .00
NUTRIENT/EUTROPHICATION BIOLOGICAL INDICATORS .00 28,477.00 .00 .00 .00 .00 .00 .00 .00
OXYGEN, DISSOLVED 216.77 2,375.00 .00 .00 .00 .00 .00 .00 .00
PH 87.80 5,350.70 .00 .00 .00 .00 .00 .00 .00
PHOSPHORUS (TOTAL) .00 588.00 .00 .00 .00 .00 .00 .00 .00
POLYCHLORINATED BIPHENYLS 548.00 3,300.00 .00 .00 .00 .00 .00 .00 .00
SALINITY .00 47.00 .00 .00 .00 .00 .00 .00 .00
SEDIMENTATION/SILTATION .00 1,767.00 .00 .00 .00 .00 .00 .00 .00
SELENIUM 431.90 .00 .00 .00 .00 .00 .00 .00 .00
SPECIFIC CONDUCTANCE .00 649.00 .00 .00 .00 .00 .00 .00 .00
TEMPERATURE, WATER 522.70 .00 .00 .00 .00 .00 .00 .00 .00

Nebraska

Probable Sources Contributing to Impairment

Description of this table
State Source Name Size of Assessed Waters with Probable Sources of Impairment
Rivers, Streams, Creeks (Miles) Lakes, Ponds, Reservoir (Acres) Bays, Estuaries (Square Miles) Coastal Shorelines (Miles) Oceans, Near Coastal Waters (Square Miles) Wetlands (Acres) Great Lakes Shoreline (Miles) Great Lakes Open Waters (Square Miles) Inland Lake Shoreline (Miles)
AGRICULTURE 415.10 3,431.00 .00 .00 .00 .00 .00 .00 .00
ANIMAL FEEDING OPERATIONS (NPS) 1,993.50 .00 .00 .00 .00 .00 .00 .00 .00
CROP PRODUCTION (CROP LAND OR DRY LAND) 328.70 .00 .00 .00 .00 .00 .00 .00 .00
HIGHWAYS, ROADS, BRIDGES, INFRASTURCTURE (NEW CONSTRUCTION) .00 648.00 .00 .00 .00 .00 .00 .00 .00
INDUSTRIAL POINT SOURCE DISCHARGE 6.10 .00 .00 .00 .00 .00 .00 .00 .00
MUNICIPAL (URBANIZED HIGH DENSITY AREA) 206.50 123.00 .00 .00 .00 .00 .00 .00 .00
MUNICIPAL POINT SOURCE DISCHARGES 1,754.60 .00 .00 .00 .00 .00 .00 .00 .00
NATURAL SOURCES 760.30 20,276.00 .00 .00 .00 .00 .00 .00 .00
SOURCE UNKNOWN 1,390.28 35,789.70 .00 .00 .00 .00 .00 .00 .00
STREAMBANK MODIFICATIONS/DESTABLIZATION 11.61 .00 .00 .00 .00 .00 .00 .00 .00
WILDLIFE OTHER THAN WATERFOWL 1,942.80 .00 .00 .00 .00 .00 .00 .00 .00

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