Lake Wausau, Mosinee Flowage,Bull Junior Creek,Lower Eau Claire (Marathon Co.) River,Lower Rib River,Little Rib River Watershed (CW16, CW19, CW20, CW23, CW24)
Lake Wausau, Mosinee Flowage,Bull Junior Creek,Lower Eau Claire (Marathon Co.) River,Lower Rib River,Little Rib River Watershed (CW16, CW19, CW20, CW23, CW24)
Lake Wausau (1437500)
1851.01 Acres
Natural Community
Natural communities (stream and lake natural communities) represent model results that use predicted flow and temperature based on landscape features and related assumptions. Ranges of flow and temperature associated with specific aquatic life communities (fish, macroinvertebrates) help biologists identify appropriate resource management goals. Wisconsin Natural Communities.
Impounded Flowing Water
Year Last Monitored
This is the most recent date of monitoring data stored in SWIMS. Additional surveys for fish and habitat may be available subsequent to this date.
2020
Good
 
Marathon
Trout Water 
Trout Waters are represented by Class I, Class II or Class III waters. These classes have specific ecological characteristics and management actions associated with them. For more information regarding Trout Classifications, see the Fisheries Trout Class Webpages.
No
Outstanding or Exceptional 
Wisconsin has designated many of the state's highest quality waters as Outstanding Resource Waters (ORWs) or Exceptional Resource Waters (ERWs). Waters designated as ORW or ERW are surface waters which provide outstanding recreational opportunities, support valuable fisheries and wildlife habitat, have good water quality, and are not significantly impacted by human activities. ORW and ERW status identifies waters that the State of Wisconsin has determined warrant additional protection from the effects of pollution. These designations are intended to meet federal Clean Water Act obligations requiring Wisconsin to adopt an 'antidegradation' policy that is designed to prevent any lowering of water quality - especially in those waters having significant ecological or cultural value.
No
Impaired Water 
A water is polluted or 'impaired' if it does not support full use by humans, wildlife, fish and other aquatic life and it is shown that one or more of the pollutant criteria are not met.
No

Fish and Aquatic Life

Current Use
The use the water currently supports. This is not a designation or classification; it is based on the current condition of the water. Information in this column is not designed for, and should not be used for, regulatory purposes.
Impounded Flowing Water
This classification includes waterbodies created by dams (mill ponds, reservoirs, flowages, and other impoundments) with a residence time of 14 days or more (under summer (June – Sept) mean low flow conditions with a 1 in 10 year recurrence interval (US EPA 2000)). Many natural lakes also have dams or water level control structures. However, to be included in the Impounded Flowing Waters category, the dam or water level control structure, must account for more than half of a waterbody’s maximum depth. Impoundments with a residence time of less than 14 days should be covered under the rivers and stream assessment methodology process.
Attainable Use
The use that the investigator believes the water could achieve through managing "controllable" sources. Beaver dams, hydroelectric dams, low gradient streams, and naturally occurring low flows are generally not considered controllable. The attainable use may be the same as the current use or it may be higher.
FAL
Fish and Aquatic Life - waters that do not have a specific use designation subcategory assigned but which are considered fishable, swimmable waters.
Designated Use
This is the water classification legally recognized by NR102 and NR104, Wis. Adm. Code. The classification determines water quality criteria and effluent limits. Waters obtain designated uses through classification procedures.
Default FAL
Fish and Aquatic Life - Default Waters do not have a specific use designation subcategory but are considered fishable, swimmable waters.

Overview

Lake Wausau, T28N, R7E, Section 24 Surface Acres = 1,918.0, Maximum Depth = 30 feet, Secchi Disk = 3 feet

Lake Wasua soft water drainage lake (impoundment) having slightly acid, medium brown water. The entire shoreline is upland. Littoral materials consist of sand (75 percent), muck (20 percent), and rubble (5 percent). The growth of aquatic vegetation is moderate in quantity. Fish inhabiting the lake include muskellunge, northern pike, walleye, largemouth bass, smallmouth bass, yellow perch, bluegill, black crappie, rock bass, pumpkinseed, black bullhead, white sucker, and northern redhorse. Waterfowl make use of this flowage, especially on fall migrations, due to city imposed restrictions on hunting. Of the lake's 73.9 miles of shoreline, 5.5 miles are in public ownership. Eight public boat landings, some with parking, have been provided. Shoreline developments include numerous city and county parks and 127 dwellings. Inlet streams include the Rib River, the Eau Claire River, and the Wisconsin River. The outlet, the Wisconsin River, flows to the Mosinee Flowage. The water control structure, owned by the Wisconsin Public Service Corporation, is used to generate electric power. The dam has a head of 27 feet.

Source: 1977, Surface Water Resources of Marathon County

Date  1977

Author   Aquatic Biologist

Recommendations

Sewer Service Area Planning
The Wausau Urban Area 2025 Sewer Service Area (SSA) Plan updates planning goals, objectives, and procedures, and expands the sewer service area by adding 12,823 acres, for a new total SSA of 53, 271 acres. Initially, approximately 29% of this area (15,271 acres) will be undeveloped. The SSA excludes wetlands, floodplain and steep slope areas that are considered "environmentally sensitive areas". The plan update has been adopted by the Marathon County Metropolitan Planning Commission. The approval of this sewer service area amendment does not constitute approval of any other local, state, or federal permit that may be required for sewer construction or associated land development activities.

Management Goals

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

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

Monitoring Projects

Watershed Characteristics

Lake Wausau is located in the Mosinee Flowage watershed which is 81.83 mi². Land use in the watershed is primarily forest (52%), wetland (15.30%) and a mix of agricultural (11.40%) and other uses (21.20%). This watershed has stream miles, lake acres and 7,457.82 wetland acres.

Nonpoint Source Characteristics

This watershed is ranked Medium for runoff impacts on streams, Low 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.

Natural Community

Lake Wausau is considered a Impounded Flowing Water 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.

This classification includes waterbodies created by dams (mill ponds, reservoirs, flowages, and other impoundments) with a residence time of 14 days or more (under summer (June – Sept) mean low flow conditions with a 1 in 10 year recurrence interval (US EPA 2000)). Many natural lakes also have dams or water level control structures. However, to be included in the Impounded Flowing Waters category, the dam or water level control structure, must account for more than half of a waterbody’s maximum depth. Impoundments with a residence time of less than 14 days should be covered under the rivers and stream assessment methodology process.