High Phosphorus Levels, Excess Algal Growth
Fish and Aquatic Life
Gass Lake is a small seepage lake covering 6 acres and having a maximum depth of 24 feet. A public
boat ramp provides public access.
Author Aquatic Biologist
Source: 1968, Surface Water Resources of Manitowoc County Goss Lake, T18N, R23E, Section 3 (15) Surface acres - 4.5, S.D.F. = 1.25, Maximum depth = 24 feet.
A hard water landlocked lake in terminal moraine about 3 miles southwest of Manitowoc. The lake is fed by seepage and drainage and has clear water. The bottom is mostly mucky with some gravelly areas. It is managed for largemouth bass, panfish, and northern pike. Approximately 80% of the ten acres of adjacent wetland is wooded. Ducks make limited use of the lake, but there is a significant muskrat population. Hunting is permitted. Public access is possible via a town road with parking. There is one boat livery on the lake.
Author Surface Water Inventory Of Wisconsin
Gass Lake (WBIC 67100) was listed for total phosphorus in 2016. The 2018 assessments showed continued impairment by phosphorus; new total phosphorus sample data exceeded 2018 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use. Chlorophyll-a sample data clearly exceeded REC thresholds, and nearly exceeded the FAL use thresholds. Based on the most updated information, no change in existing impaired waters listing was needed.
Author Ashley Beranek
Gass Lake (WBIC 67100) was assessed during the 2016 listing cycle; total phosphorus and chlorophyll sample data exceed 2016 WisCALM listing thresholds for the Recreation use, but do not exceed Fish and Aquatic Life thresholds.
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 2018. See also the 'monitoring and projects' tab.
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
|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|
|67100||Gass Lake||10003544||Gass Lake||9/8/2000||8/9/2018||Map||Data|
|67100||Gass Lake||363035||Gass Lake - Deepest Point||2/11/1976||9/5/2021||Map||Data|
|67100||Gass Lake||10019447||Gass Lake -- Access at NE Side Of Lake ||7/3/2010||8/21/2021||Map||Data|
|67100||Gass Lake||10038598||Gass Lake- deep hole||Map||Data|
Gass Lake is located in the Sevenmile and Silver Creeks watershed which is 112.90 mi². Land use in the watershed is primarily agricultural (57.20%), grassland (18.40%) and a mix of wetland (7.50%) and other uses (16.80%). This watershed has 184.08 stream miles, 10,577.89 lake acres and 4,732.70 wetland acres.
Nonpoint Source Characteristics
This watershed is ranked High 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.
Gass Lake is considered a Small under the state's Natural Community Determinations.
Natural communities (stream and lake natural communities) represent model resultsand DNR staff valiation processes that confirm or update predicted conditions based on flow and temperature modeling from historic and current landscape features and related variables. Predicated flow and temperatures for waters are associated predicated fish assemblages (communities). Biologists evaluate the model results against current survey data to determine if the modeled results are corect and whether biological indicators show water quaity degradation. This analysis is a core component of the state's resource management framework. Wisconsin's Riverine Natural Communities.
Small lake describes the size of small isolated waters. These variables affect the lakes response to watershed variables.