Riley Lake, Otter Creek and Rat River Watershed (GB12)
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Riley Lake, Otter Creek and Rat River Watershed (GB12)
Riley Lake (557100)
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220.12 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.
Shallow Lowland
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.
2017
Excellent
 
Forest
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.
Shallow Lowland
Shallow lowland lake describes the depth and location of the lake in a watershed. These variables affect the lakes response to watershed variables.
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.
Default FAL
Fish and Aquatic Life - Default Waters do not have a specific use designation subcategory but 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

, in the Otter Creek and Rat River Watershed, is a 220.11 acre lake that falls in Forest County. This lake is managed for fishing and swimming and is currently not considered impaired.

Date  2011

Author   Aquatic Biologist

Historical Description

Source: 1977, Surface Water Resources of Forest County Riley Lake, T35N, R14E, Sec. 7 Surface Acres = 213, Maximum depth = 12 feet, Secchi disk = 5 feet.

A hard water drainage lake having alkaline, clear water of low transparency. Two inlet streams drain Little Riley Lake, Lake 8-8 and Indian Springs and the outlet, navigable with small craft, flows to Wabikon Lake. The shoreline is mostly upland (60 percent) of hardwoods and conifer with the remainder being wetland, consisting of bog, meadow, shrub and conifer. The littoral materials are sand (40 percent), muck (35 percent), gravel (15 percent), rubble (8 percent) and boulders (2 percent). The fish population is composed of muskellunge, largemouth bass, perch, bluegill, black crappie, and pumpkinseed. The lake basin supports a relatively dense growth of aquatic vegetation. Waterfowl make use of this lake. There is no boat landing and the shoreline is free of developments. There is no public frontage. Public access can be gained via the navigable outlet from Wabikon Lake.

Date  1977

Author   Surface Water Inventory Of Wisconsin

Riley Lake, Otter Creek and Rat River Watershed (GB12) Fish and Aquatic LifeRiley Lake, Otter Creek and Rat River Watershed (GB12) RecreationRiley Lake, Otter Creek and Rat River Watershed (GB12) Fish Consumption

Condition

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.

Reports

2020 Comprehensive WQ Assessments
2018 List of Healthy (Category 2) Waters
Final Assessment Data from TSI Package and Assessment Units 2018
Lake Bathymetry Map for Riley Lake

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

Project Name (Click for Details)Year Started
Fish Propagation Actions2001

Monitoring Projects

WBICOfficial Waterbody NameStation IDStation NameEarliest Fieldwork DateLatest Fieldwork DateView StationView Data
557100Riley Lake10046703Phragmites Occurrence - Riley LakeMapData
3000411Unnamed10046703Phragmites Occurrence - Riley LakeMapData
557100Riley Lake10046702Phragmites Occurrence - Riley LakeMapData
557100Riley Lake214012Riley Lake - Riley LakeMapData
557100Riley Lake10002624Riley Lake5/12/19999/30/2017MapData
3000411Unnamed10046702Phragmites Occurrence - Riley LakeMapData

Watershed Characteristics

Riley Lake is located in the Otter Creek and Rat River watershed which is 141.51 mi². Land use in the watershed is primarily forest (73.60%), wetland (20.50%) and a mix of open (2.70%) and other uses (3.10%). This watershed has 139.69 stream miles, 2,907.05 lake acres and 15,033.81 wetland acres.

Nonpoint Source Characteristics

This watershed is ranked Low for runoff impacts on streams, Not Ranked for runoff impacts on lakes and Low for runoff impacts on groundwater and therefore has an overall rank of Low. 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

Riley Lake is considered a Shallow Lowland 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.

Shallow lowland lake describes the depth and location of the lake in a watershed. These variables affect the lakes response to watershed variables.

Maps of Watershed
RILEY LAKE NESTS