Fish and Aquatic Life
Green Isle Lake, in the Bark River Watershed, is a 27.83 acre lake that falls in Jefferson County. This lake is managed for fishing and swimming and is currently not considered impaired.
Author Aquatic Biologist
Source: 1968, Surface Water Resources of Jefferson County Green Isle Lake, (Hebron Millpond), T5N, R15E, Section 2
This impoundment, at Hebron, was created by a dam with 11 foot head on the Bark River. The water is clear and alkaline and lies over a silt bottom. Northern pike and panfishes (bluegills, crappies, whitebass, yellow bass, bullheads) constitute the fishery; however, winterkill is an occasional problem that controls stunted panfish. Access, though difficult, is possible from highways bordering the lake. There are no adjoining wetlands. Since the lake is located near a village, hunting is not encouraged.
Surface Acres = 28.0, S.D.F. = 2.16, Maximum Depth = 15 feet
Author Surface Water Inventory Of Wisconsin
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 2018. See also the 'monitoring and projects' tab.
Jefferson County Land and Water Conservation Department will undertake a lake classification process. The resulting lake classification system will enable the County and other lake management entities to implement appropriate lake management strategies in a priority -driven and efficient manner. It will result in the protection and restoration of the water quality and natural ecosystems of the lakes in Jefferson County.
Monitor Water Quality or Sediment
Monitor TP for impairment assessment. Miles 0 - 12.46 and 35 - 41 are listed for TP. For miles 12.46 - 35 there are only 3 samples from 2005.
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 or implementation of a Total Maximum Daily Load analysis, a Nine Key Element Plan, or other restoration work, education and outreach and more. If specific recommendations exist for this water, they will be displayed below online.
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|
|823000||Green Isle Lake ||10003052||Green Isle Lake||7/27/1999||7/25/2004||Map||Data|
|823000||Green Isle Lake ||283115||Green Isle Lake - Deep Hole||6/30/1980||6/30/1980||Map||Data|
|823000||Green Isle Lake ||284001||Green Isle Lake - Green Isle Lake||8/29/1979||8/29/1979||Map||Data|
Green Isle Lake is located in the Bark River watershed which is 185.84 mi². Land use in the watershed is primarily agricultural (29.90%), wetland (22.40%) and a mix of forest (15.20%) and other uses (32.50%). This watershed has 265.69 stream miles, 3,499.26 lake acres and 22,145.94 wetland acres.
Nonpoint Source Characteristics
This watershed is ranked Medium for runoff impacts on streams, High 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.