Fond Du Lac
Fish and Aquatic Life
Source: 1969, Surface Water Resources of Fond du Lac County
Long Lake, T14N, R19E, Sections 13, 24
Surface Acres = 427, S.D.F. = 1.76, Maximum Depth = 47 feet
This is the largest, and easily the most important lake in
the county from all aspects of water-based recreation (excluding
Lake Winnebago). Over 8,000 feet of frontage is in public
ownership as part of the Kettle Moraine State Forest.
The lake was enlarged to its present size in about 1860, by
construction of a dam with approximately a head of 6 feet on the
outlet stream. Most of the east, (State forest) and parts of the
west shores were marsh prior to the dam, and this marsh is now a
3' - 4' "shelf" about 200 feet wide with a sharp dropoff at the
original shoreline. Water supply for the lake is Watercress
Creek, a brook trout stream, plus several other feeders carrying
surface runoff. A small 17 acre lake, (Tittle Lake) lies between
the mouth of Watercress Creek and Long Lake proper, and is
connected to Long Lake via a short, shallow, relatively narrow
channel. At the outlet dam a shallow, vegetation filled flowage
of 12 acres lies between the dam and the lake proper, and is
connected to the lake by a shallow channel about 200 yards long.
Downstream from the dam, the stream is designated as the East
Branch of the Milwaukee River. The water remains clear
throughout the year, despite the lake's fertility. This
contributes to fine swimming, water skiing, boating, and fishing.
Several hundred state forest campsites, an excellent swimming
beach with bathhouse, and picnic and boat launching facilities,
are developed on state property.
The west shore of the lake adjacent to State Highway No.67,
plus the northeast shoreline is developed intensively for summer
cottages plus a resort and three boat liveries. The west shore
of Tittle Lake is similarly developed with cottages and one
resort. The north end of Long Lake and the entire west shore of
Tittle Lake is owned by the Milwaukee Council of the Boy Scouts
of America, and is developed as "Camp Long Lake."
Due to its long, narrow nature, the lake is well suited to
and heavily used by water skiers. This conflicts with daytime
fishing, but skiing hours are limited to 9-5 pm.
There are about 200 acres of marsh-swamp associated with
Long Lake and Watercress Creek, which offer valuable habitat for
furbearers, frogs, and ducks. Wood duck, bluewing teal, and
mallard are known to nest in this area, but the limited hunting
on the lake is mostly for coot and diving ducks.
Fish populations have been described in various reports as
exceptional and excellent. Particularly impressive is the
average size and variety of fish which can be taken. No fish
have been stocked since 1954, and surveys as recently as 1963
have shown no need for stocking in the forseeable future.
Primary game fish species are walleye, northern pike, and
largemouth bass, with perch, bluegill, black crappie, and
bullhead offering panfishing. Carp are present, but do not
constitute a problem at this time.
Author Surface Water Inventory Of Wisconsin
Long Lake South Beach, Kettle Moraine SF - Northern Unit was assessed for the 2018 listing cycle; E. coli data sample data were clearly below the 2018 WisCALM listing thresholds for the Recreation use. This beach was meeting this designated use and was not considered impaired.
Author Ashley Beranek
Long Lake (38700) was placed on the impaired waters list for Mercury in fish tissue in 1998. This water was assessed during the 2016 listing cycle; total phosphorus and chlorophyll sample data were clearly below 2016 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use. This water was also assessed for chlorides and sample data were clearly below 2016 WisCALM chronic and acute listing criteria for the Fish and Aquatic Life use. This lake is considered impaired for Fish Consumption use and meeting REC and FAL uses.
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|
Long Lake is located in the East and West Branches Milwaukee River watershed which is 266.00 mi². Land use in the watershed is primarily agricultural (35.50%), wetland (19.20%) and a mix of forest (17.90%) and other uses (27.40%). This watershed has 312.44 stream miles, 2,023.13 lake acres and 32,107.47 wetland acres.
Nonpoint Source Characteristics
This watershed is ranked High 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.