Impaired Water - Wisconsin River (Wisconsin River)
Lincoln County, Wisconsin
UW32, UW33, UW35, UW39
1179900
304.23 - 324.68
20.45
Condition has remained stable; water is not impaired.
Notes
This water was assessed during the 2014 listing cycle; total phosphorus sample data clearly met 2014 WisCALM listing thresholds for the Fish and Aquatic Life use.

This water was assessed during the 2018 listing cycle; new total phosphorus sample data clearly meets 2018 WisCALM listing criteria for the Fish and Aquatic Life use.
Listing Details
Pollutant
BOD, sediment load
Listed For
Impairments
Low DO
Current Use
Listing Status
Water Delisted
Attainable Use
Priority
Delisted 2008
Designated Use
303(d) ID
527
Listing Date
4/1/1998
Impaired Water Notes
New Data. Extensive monitoring and analysis found exceedances may be less than or equal to the error inherent in the monitoring process. There is no perceivable impact on aquatic life and modeling suggests complete elimination of point source discharges would have minimal effect on D.O. The marginal exceedances of the dissolved oxygen are thought to be due to natural background conditions including a large complex marshland ecosystem upstream from the listed segment. Best professional judgement and modeling indicates a healthy aquatic community exists in the segment with intolerant fish species including smallmouth bass, muskellunge, northern hog sucker and rock bass being present.
Date
4/1/2008

 
Pollutant
Mercury
Listed For
Impairments
Mercury Contaminated Fish Tissue
Current Use
Listing Status
Water Delisted
Attainable Use
Priority
Delisted 2008
Designated Use
303(d) ID
527
Listing Date
4/1/1998
Impaired Water Notes
New Data. Remove due to new fish contaminant data.
Date
4/1/2008

Impaired Water Notes
Extensive monitoring and analysis found exceedances may be less than or equal to the error inherent in the monitoring process. There is no perceivable impact on aquatic life and modeling suggests complete elimination of point source discharges would have minimal effect on D.O. The marginal exceedances of the dissolved oxygen are thought to be due to natural background conditions including a large complex marshland ecosystem upstream from the listed segment. Best professional judgement and modeling indicates a healthy aquatic community exists in the segment with intolerant fish species including smallmouth bass, muskellunge, northern hog sucker and rock bass being present.

From Jim Kreitlow:

Multiple fish surveys in different years show a healthy fishery within segment A. A recent survey conducted in October 2007 within what was considered to be an area of low D.O. found 19 species of fish including intolerant species such as smallmouth bass, musky, northern hog sucker and rock bass.

Stations: Davenport Street bridge in Rhinelander downstream to Hat Rapids dam (Oct. 2007). Whirlpool Rapids, June 2007, Menard Island , June 2007, 1 mile below Hat Rapids dam downstream, Baseline survey August 2003.

Parameters: Fish summary
Date