Impaired Water - Wisconsin River (Wisconsin River (At Castle Rock Lake))
Adams, Juneau County, Wisconsin
CW01, CW02, CW06
1179900
158.68 - 173.27
14.59
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
The Petenwell and Castle Rock Flowages Comprehensive Management Plan was completed in 1996. This report indicates severe algal blooms cause periodic shifts in dissolved oxygen. During photosynthesis, dissolved oxygen values are high (11-12 mg/l) but during respiration, they can drop below 5.0 mg/l (Storet, 1992 was referenced). The report also indicates blue-green algae are the dominant phytoplankton in the Petenwell and Castle Rock Flowages. The report also references sediment sampling has been completed in both flowages, however additional sampling is recommended. Previous sampling found high levels of 2,3,7,8-TCDD and 2,3,7,8-TCDF in the sediments. PCBs and mercury have also been detected at limited sampling sites. Currently, a fish consumption advisory exists on the flowage for PCBs, mercury. New fish tissue data in the 2016 listing cycle indicates that the Dioxin listing can be removed.

This water was assessed during the 2018 listing cycle; new macroinvertebrate sample data exceeded 2018 WisCALM listing criteria for the Fish and Aquatic Life use (i.e. at least one macroinvertebrate Index of Biotic Integrity (IBI) average scored in the poor condition category).
This water is part of the Wisconsin River TMDL.
Listing Details
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Eutrophication, Degraded Biological Community
Current Use
WWSF - Warmwater Sport Fishery
Listing Status
TMDL Approved
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Not Applicable
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
530
Listing Date
4/1/1998
Impaired Water Notes
The Wisconsin River at Castle Rock Flowage, WBIC 1179900, incorrectly had pH and nitrogen as pollutant/impairment. The correct listing is now shown (same for the assessment unit Castlerock Flowage). Pollutant: TP, Impairment: Eutrophication. The nitrogen/Elevated pH was listed in error and should have been corrected in 2008. Most likely it was originally listed for nutrients, and accidentally someone chose N instead of P.
Date
3/22/2011

Impaired Water Notes
This water was assessed during the 2018 listing cycle; new macroinvertebrate sample data exceeded 2018 WisCALM listing criteria for the Fish and Aquatic Life use (i.e. at least one macroinvertebrate Index of Biotic Integrity (IBI) average scored in the poor condition category).
Date
5/26/2017

Impaired Water Notes
This water is part of the 2019 approved Wisconsin River TMDL addressing Total Phosphorus and Total Suspended Solids.
Date
6/10/2019

 
Pollutant
Dioxin
Listed For
Fish Consumption
Impairments
NA
Current Use
Specific Restricted Fish Consumption
Listing Status
Pollutant Removed
Attainable Use
Unrestricted Fish Consumption
Priority
Delisted 2016
Designated Use
Unrestricted Fish Consumption
303(d) ID
530
Listing Date
4/1/1998
Impaired Water Notes
New fish tissue data indicates that this water no longer needs specific fish consumption advice for dioxins. Dioxin is proposed for deletion from the 2016 impaired waters list.
Date
9/29/2015

 
Pollutant
PCBs
Listed For
Fish Consumption
Impairments
PCBs Contaminated Fish Tissue
Current Use
Specific Restricted Fish Consumption
Listing Status
303d Listed
Attainable Use
Unrestricted Fish Consumption
Priority
Low
Designated Use
Unrestricted Fish Consumption
303(d) ID
530
Listing Date
4/1/1998
Impaired Water Notes
2008 IW Documentation Sheet: Delist for PCBs.
Date
11/26/2007

 
Pollutant
Mercury
Listed For
Fish Consumption
Impairments
Mercury Contaminated Fish Tissue
Current Use
Specific Restricted Fish Consumption
Listing Status
303d Listed
Attainable Use
Unrestricted Fish Consumption
Priority
Low
Designated Use
Unrestricted Fish Consumption
303(d) ID
530
Listing Date
4/1/1998
Impaired Water Notes
2008 IW Documentaiton Sheet:
Delist for Hg
Date
11/26/2007