Fish and Aquatic Life
Riverdale Flowage, in the Lower Apple River Watershed, is a 68.13 acre lake that falls in Saint Croix County. This lake is managed for fishing and swimming and is currently not considered impaired.
Author Aquatic Biologist
Source: 1961, Surface Water Resources of St.Croix Co. Riverdale Flowage - T. 31 N., R. 18 W., Sec. 29, 30, 31 Surface Acres = 68.0 S.D.F. , 3.05 Maximum Depth = 23 feet A hardwater, drainage impoundment on the Apple River. It has a navigable inlet and a 23 foot head public utility dam (Interstate Light and Power Company) on its outlet (87 CFS). Managed for walleyes, bass and panfish, its fish population includes walleyes, largemouth bass, bluegills, black crappies, rock bass, perch, carp and white suckers. Less common species present are muskellunge, northern pike, green sunfish and black bullheads. A public access is located at the northwest side of the flowage, where a town road extends to the lake. Its private development consists of 12 cottages. The remaining undeveloped shore is pastured land.
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.
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|
|2614600||Riverdale Flowage||563128||Riverdale Flowage - Deep Hole||4/22/2003||7/24/2003||Map||Data|
|2614250||Pine Lake (Somerset)T31nr19ws10||10036961||Pine Lake (Somerset)T31nr19ws10||6/29/2010||7/13/2012||Map||Data|
|2614600||Riverdale Flowage||10018303||Apple River/Riverdale Flowage -- Access||Map||Data|
|2614600||Riverdale Flowage||10047885||On Apple River 1/4 mi S of CTH C and 93rd St||7/21/2015||7/21/2015||Map||Data|
|2614600||Riverdale Flowage||10005437||Riverdale Flowage||8/7/2001||8/19/2017||Map||Data|
Riverdale Flowage is located in the Lower Apple River watershed which is 202.16 mi². Land use in the watershed is primarily forest (31.20%), agricultural (28.20%) and a mix of grassland (25.70%) and other uses (14.80%). This watershed has 151.64 stream miles, 4,391.99 lake acres and 9,095.80 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.