Excess Algal Growth, Eutrophication
Fish and Aquatic Life
Hidden Valley Lake, in the Yellowstone River Watershed, is a 22.39 acre lake that falls in Lafayette County. This lake is managed for fishing and swimming and is currently considered impaired.
Author Aquatic Biologist
Hidden Valley Lake (WBIC 903450) was assessed during the 2018 listing cycle; new total phosphorus sample data overwhelmingly exceeded the 2018 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use. Chlorophyll-a sample data also exceeded the REC and FAL use thresholds. This lake was proposed for total phosphorus listing in 2018.
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 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|
|903450||Hidden Valley Lake 1||10030851||Hidden Valley Lake||4/5/2008||3/17/2018||Map||Data|
|903450||Hidden Valley Lake 1||333231||Hidden Valley Lake (Un Lake) - Deep Hole||5/13/1993||9/24/2022||Map||Data|
|903450||Hidden Valley Lake 1||104452||Un Lake (Hidden Valley)||Map||Data|
Hidden Valley Lake 1 is located in the Yellowstone River watershed which is 57.46 mi². Land use in the watershed is primarily grassland (47%), agricultural (30.10%) and a mix of forest (18.80%) and other uses (4.00%). This watershed has 158.93 stream miles, 9.53 lake acres and 636.16 wetland acres.
Nonpoint Source Characteristics
This watershed is ranked High for runoff impacts on streams, Medium 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.
Hidden Valley Lake is considered a Deep Headwater under the state's Natural Community Determinations.
Natural communities (stream and lake natural communities) represent model results and 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.
Deep headwater lake describes the depth and location of the lake in a watershed. These variables affect the lakes response to watershed variables.