Fish and Aquatic Life
Mill Creek, located in northeast Monroe County, flows in a southeasterly direction for nearly
10 miles before reaching the East Fork of the Lemonweir River near Wyeville. Upstream of
HWY 12 for five miles, Mill Creek is a Class I trout stream and designated as an Exceptional
Resource Water (ERW). Downstream of HWY 12 to the Water Mill Pond, Mill Creek is a
Class II trout stream. Below the Water Mill Pond, Mill Creek is not a classified trout stream.
Mill Creek provides water for two cranberry operations and has been ditched in its lower
The most recent biological survey, conducted in 1965, documented brook trout, two forage
fish species. Bluegill, and largemouth bass were also noted in Mill Creek just upstream from
Water Mill Pond. The Mill Creek State Fishery Area extends both upstream and downstream
from the I-94 bridge on the upper portion of Mill Creek. The WDNR owns land and
easements within this fishery area. Access to Mill Creek is from the Mill Creek State Fishery
Area and 9 road crossings.
Ripp, Coreen, Koperski, Cindy and Folstad, Jason. 2002. The State of the Lower Wisconsin River Basin.
PUBL WT-559-2002. Wisconsin Department of Natural Resources, Madison, WI.
Author Cynthia Koperski
The Mill Creek (Tributary 1327200 to US 12) was assessed during the 2018 listing cycle; total phosphorus sample data clearly exceeded the 2018 WisCALM listing thresholds for the Fish and Aquatic Life use. Available biological data did not indicate impairment (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category). This water was not meeting this designated use and was considered impaired. No listing change was needed to this already impaired water.
Author Amanda Smith
Mill Creek (1326700) from Unnamed Trib 1327200 to US 12 was placed on the impaired waters list for total phosphorus in 2014. The 2016 assessments showed continued impairment by phosphorus; total phosphorus sample data exceeded 2016 WisCALM listing criteria for the Fish and Aquatic Life use, however, available biological data did not indicate impairment (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category). Based on the most updated information, no change in existing impaired waters listing is needed.
Author Aaron Larson
Wisconsin has over 84,000 miles of streams, 15,000 lakes and milllions of acres of wetlands. Assessing the condition of this vast amount of water is challenging. The state's water monitoring program uses a media-based, cross-program approach to analyze water condition. An updated monitoring strategy (2015-2020) is now available.
Compliance with Clean Water Act fishable, swimmable standards are located in the Executive Summary of Water Condition in 2016 . See also 'monitoring' and 'projects'.
Wisconsin's Water Quality Standards provide qualitative and quantitative goals for waters that are protective of Fishable, Swimmable conditions [Learn more]. Waters that do not meet water quality standards are considered impaired and restoration actions are planned and carried out until the water is once again fishable and swimmable
Management goals can include creation and implementation of a Total Maximum Daily Load Analysis, habitat restoration work, partnership education and outreach and more. If specific recommendations exist for this water, they will be displayed below.
Monitoring the condition of a river, stream, or lake includes gathering physical, chemical, biological, and habitat data. Comprehensive studies often gather all these parameters in great detail, while lighter assessment events will involve sampling physical, chemical and biological data such as macroinvertebrates. Aquatic macroinvertebrates and fish communities integrate watershed or catchment condition, providing great insight into overall ecosystem health. Chemical and habitat parameters tell researchers more about human induced problems including contaminated runoff, point source dischargers, or habitat issues that foster or limit the potential of aquatic communities to thrive in a given area. Wisconsin's Water Monitoring Strategy was recenty updated.
Grants and Management Projects
|Project Name (Click for Details)||Year Started|
|WBIC||Official Waterbody Name||Station ID||Station Name||Earliest Fieldwork Date||Latest Fieldwork Date||View Station||View Data|
|1326700||Mill Creek||10015613||Mill Creek St. 6 - Desoto Ave. Bridge||Map||Data|
|1326700||Mill Creek||10015614||Mill Creek St. 7 - Cth M Bridge||Map||Data|
|1326700||Mill Creek||10015615||Mill Creek St. 8 - Clay Ave. Crossing||Map||Data|
|1326700||Mill Creek||10015609||Mill Creek Station 2 - Hwy 12 Bridge||Map||Data|
|1326700||Mill Creek||10015610||Mill Creek Station 3 - Ellsworth Rd. Crossing||Map||Data|
|1326700||Mill Creek||10032306||Mill Creek - Coleman Road Crossing (Cortland Ave.)||Map||Data|
Mill Creek is located in the Beaver Creek - Juneau watershed which is 282.77 mi². Land use in the watershed is primarily forest (43%), wetland (25%) and a mix of agricultural (13%) and other uses (20%). This watershed has 551.73 stream miles, 7,135.81 lake acres and 76,388.60 wetland acres.
Nonpoint Source Characteristics
This watershed is ranked Not Ranked for runoff impacts on streams, Low for runoff impacts on lakes and Low for runoff impacts on groundwater and therefore has an overall rank of Low. This value can be used in ranking the watershed or individual waterbodies for grant funding under state and county programs.However, all waters are affected by diffuse pollutant sources regardless of initial water quality. Applications for specific runoff projects under state or county grant programs may be pursued. For more information, go to surface water program grants.