Impaired Water - Otter Creek (Otter Creek)
Iowa County, Wisconsin
LW11
1237100
14.89 - 19.86
4.97
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
1980 trout streams list (class 2).

This water was assessed during the 2016 listing cycle; temperature data exceeded 2016 WisCALM listing thresholds for the Fish and Aquatic Life use. Biological sample data met 2016 WisCALM listing thresholds for the Fish and Aquatic Life use (i.e. macroinvertebrate or fish Index of Biotic Integrity (IBI) average scored in the fair to excellent condition categories).

This water was assessed during the 2018 listing cycle; new biological (fish Index of Biotic Integrity (IBI) scores) sample data were clearly below 2018 WisCALM listing thresholds for the Fish and Aquatic Life use.
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
2016-128
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
9/2/2015

 
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
331
Listing Date
4/1/1998
Impaired Water Notes
Impoundment Blackhawk Lake -Organic loading from algal blooms and/or night time periphyton respiration. High ammonia in the stream below the dam. Agricultural non-point sediment loading.
Date
10/22/2009

Impaired Water Notes
The sediment TMDL for Otter Creek was approved by the USEPA October 2, 2008.
Date
10/2/2008