Impaired Water - West Branch Rock River (Rock River, West Branch)
Dodge, Fond Du Lac County, Wisconsin
UR12
861300
50.00 - 87.63
37.63
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This water was originally listed as impaired in 2006 due to degraded habitat caused by sediment/TSS and total phosphorus. The TMDL for these pollutants was approved in 2018.

Assessments in 2012, 2014, 2016, 2018, and 2020 confirmed the phosphorus impairment. Biology (bugs and fish) showed no impairment.
Listing Details
Pollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
Elevated Water Temperature
Current Use
LFF - Limited Forage Fishery
Listing Status
303d Listed
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Low
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
2018-236
Listing Date
4/1/2018
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new temperature sample data exceed and new total phosphorus sample data overwhelmingly exceed 2018 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
8/3/2017

 
Pollutant
Sediment/Total Suspended Solids
Listed For
Fish and Aquatic Life
Impairments
Degraded Habitat
Current Use
LFF - Limited Forage Fishery
Listing Status
TMDL Approved
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Not Applicable
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
845
Listing Date
4/1/2006
Impaired Water Notes
Type of impairment:
Physical substrate habitat alteration

Cause of impairment: **9**
Sediment
Channelization
Streambank erosion/instability

Source of impairment:
Non-point
Date
1/19/2006

Impaired Water Notes
West Branch Rock River (861300, miles 50-87.63) is a part of the Rock River Basin and is listed as impaired for total phosphorus and sediment/total suspended solids. The Rock River Basin TMDLs for phosphorus and sediment were approved by the USEPA September 28, 2011.
Date
5/8/2012

 
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Degraded Habitat
Current Use
LFF - Limited Forage Fishery
Listing Status
TMDL Approved
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Not Applicable
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
845
Listing Date
4/1/2006
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new temperature sample data exceed and new total phosphorus sample data overwhelmingly exceed 2018 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
8/3/2017

Impaired Water Notes
Baseline Monitoring
**9** Fish Assessment, 9/27/2000, IBI Score = 15 (very poor)
Habitat Assessment, 7/18/2000, Qualitative Habitat Rating = 40 (fair), high percent silt and sediment
Date
1/19/2006

Impaired Water Notes
West Branch Rock River (861300, miles 50-87.63) is a part of the Rock River Basin and is listed as impaired for total phosphorus and sediment/total suspended solids. The Rock River Basin TMDLs for phosphorus and sediment were approved by the USEPA September 28, 2011.
Date
5/8/2012

Impaired Water Notes
This water was assessed during the 2014 listing cycle; total phosphorus sample data overwhelmingly exceed 2014 WisCALM listing thresholds 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
4/1/2014

Impaired Water Notes
This water was assessed during the 2016 listing cycle; total phosphorus sample data overwhelmingly exceeded 2016 WisCALM listing thresholds 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
9/23/2015

Impaired Water Notes
This water was assessed during the 2020 listing cycle; new temperature sample data exceed and new total phosphorus sample data overwhelmingly exceed 2020 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
6/6/2019