Fish and Aquatic Life
Croal Creek is a tributary to the headwaters of Bear Creek in Sauk County. Croal Creek is classified as a Class II trout stream. The stream supports some natural reproduction of brook and brown trout.
Author Cynthia Koperski
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'.
Monitor Targeted Area
Stream assessment monitoring for fish, aquatic insects and habitat should be completed on Croal Creek, Four Springs Hollow Creek, Pumpkin Hollow Creek, and an unnamed tributary stream to Marble Creek. This assessment would help determine whether they are meeting their cold water classification, and to rate the condition of each stream. Other unnamed and not classified streams may be assessed as time and resources allow.
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|
|1236200||Croal Creek||10029917||Croal Cr. St 1 Along Croal Hollow Rd||1/1/2015||6/24/2015||Map||Data|
|1236200||Croal Creek||573158||Croal Creek (Trib To Bear) - Croal Creek (Trib To Bear)||6/13/2003||6/13/2003||Map||Data|
Croal Creek is located in the Bear Creek watershed which is 136.54 mi². Land use in the watershed is primarily agricultural (42%), forest (41%) and a mix of wetland (7%) and other uses (9%). This watershed has 236.07 stream miles, 119.46 lake acres and 6,798.61 wetland acres.
Nonpoint Source Characteristics
This watershed is ranked Medium for runoff impacts on streams, Not Ranked 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.