Fish and Aquatic Life
This is a spring and seepage fed tributary to Mill Creek. The creek is currently classified as a Class II trout stream but has potential to support a Class I fishery. Some natural reproduction of brook trout has been found in the creek. Core Hollow Creek was monitored as a part of 2000 baseline monitoring. A cursory habitat evaluation completed in the summer of 2001 found fair habitat in the lower portion of the stream and good habitat closer to the headwaters of the creek. Overall, the creek is affected by nonpoint sources of pollution from the watershed including streambank instability and erosion. Core Hollow Creek has also been impacted by hydrologic modifications.
From: 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
Core Hollow Creek (WBIC 1217000) from its mouth to its 6th trib. was assessed during the 2018 listing cycle; new biological (fish Index of Biotic Integrity (IBI) scores) sample data were clearly below the 2018 WisCALM listing thresholds for the Fish and Aquatic Life use. This water was meeting this designated use and was not considered impaired.
Author Ashley Beranek
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
|WBIC||Official Waterbody Name||Station ID||Station Name||Earliest Fieldwork Date||Latest Fieldwork Date||View Station||View Data|
|1217000||Core Hollow Creek||10008046||Core Hollow Station 3 (Pond at Sth 171 And Violet Drive)||11/13/2000||11/13/2000||Map||Data|
|1217000||Core Hollow Creek||10008044||Core Hollow Station 1||11/13/2000||1/1/2015||Map||Data|
|1217000||Core Hollow Creek||10008045||Core Hollow Station 2||11/13/2000||1/1/2015||Map||Data|
Core Hollow Creek is located in the Mill and Indian Creeks watershed which is 130.32 mi². Land use in the watershed is primarily forest (46%), agricultural (46%) and a mix of suburban (5%) and other uses (3%). This watershed has 313.19 stream miles, 179.45 lake acres and 1,834.87 wetland acres.
Nonpoint Source Characteristics
This watershed is ranked High for runoff impacts on streams, Low for runoff impacts on lakes and High for runoff impacts on groundwater and therefore has an overall rank of High. 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.