Impaired Water - Little Willow Creek (Little Willow Creek)
Richland County, Wisconsin
LW12
1221300
0.00 - 7.73
7.73
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
1980 trout streams list (class 2).
Little Willow Creek is approximately eight miles long, located in the southeast portion of Richland County Wisconsin. The Wisconsin Department of Natural Resources (WDNR) placed the entire length of Little Willow Creek on the state's 303(d) impaired waters list
in 1996 as high priority due to degraded habitat caused by excessive sedimentation (Table 1). The Clean Water Act and US EPA regulations require that each state develop
TMDLs for waters on the Section 303(d) list.
This water was assessed during the 2014 listing cycle; phosphorus sample data nearly exceeded (May Exceed) 2014 WisCALM listing thresholds for the Fish and Aquatic Life use, but biological sample data, macroinvertebrate or fish Index of Biotic Integrity (IBI), scored in the fair to excellent condition categories. Further monitoring is recommended.
This water was assessed during the 2016 listing cycle; total phosphorus sample data exceed 2016 WisCALM listing criteria for the Fish and Aquatic Life use, however, available biological data do not indicate impairment (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category). Temperature data exceeded 2016 WisCALM listing thresholds for the Fish and Aquatic Life use.
This water was assessed during the 2018 listing cycle; new temperature sample data exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use.

Assessments during the 2020 listing cycle showed new fish sample data were in excellent condition.
Listing Details
Pollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
Elevated Water Temperature
Current Use
Coldwater - stocked, reproduction
Listing Status
303d Listed
Attainable Use
Coldwater - stocked, reproduction
Priority
Low
Designated Use
Coldwater - stocked, reproduction
303(d) ID
2016-126
Listing Date
4/1/2016
Impaired Water Notes
This water was assessed during the 2016 listing cycle; temperature data exceeded 2016 WisCALM listing thresholds for the Fish and Aquatic Life use.
Date
8/29/2015

Impaired Water Notes
This water was assessed during the 2018 listing cycle; new temperature sample data exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use.
Date
4/12/2017

 
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Impairment Unknown
Current Use
Coldwater - stocked, reproduction
Listing Status
303d Listed
Attainable Use
Coldwater - stocked, reproduction
Priority
Low
Designated Use
Coldwater - stocked, reproduction
303(d) ID
2016-125
Listing Date
4/1/2016
Impaired Water Notes
This water was assessed during the 2016 listing cycle; total phosphorus sample data exceed 2016 WisCALM listing criteria for the Fish and Aquatic Life use, however, available biological data do not indicate impairment (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category).
Date
8/29/2015

 
Pollutant
Sediment/Total Suspended Solids
Listed For
Fish and Aquatic Life
Impairments
Degraded Habitat
Current Use
Coldwater - stocked, reproduction
Listing Status
TMDL Approved
Attainable Use
Coldwater - stocked, reproduction
Priority
Not Applicable
Designated Use
Coldwater - stocked, reproduction
303(d) ID
243
Listing Date
4/1/1998
Impaired Water Notes
The Wisconsin Department of Natural Resources (WDNR)
placed the entire length of Little Willow Creek on the state’s 303(d) impaired waters list
in 1996 as high priority due to degraded habitat caused by excessive sedimentation
(Table 1). The Clean Water Act and US EPA regulations require that each state develop
TMDLs for waters on the Section 303(d) list.
Date
5/4/2011

Impaired Water Notes
The sediment TMDL for Little Willow Creek was approved by USEPA September 9, 2008.
Date
9/9/2008