Big Trade Lake, Trade River Watershed (SC10)
Big Trade Lake, Trade River Watershed (SC10)
Big Trade Lake (2638700)
327.31 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.
Deep 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.
This lake is impaired
Impairment Unknown, Excess Algal Growth
Total Phosphorus
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.
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.
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.

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.
Deep Lowland
Deep 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.
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.


Big Trade Lake, in the Trade River Watershed, is a 327.30 acre lake that falls in Burnett County. This lake is managed for fishing and swimming and is currently considered impaired.

Date  2018

Author  Ashley Beranek

Historical Description

These four lakes are situated on the Trade River. They have been united under a common
lake association for many years. The Round - Trade Lake Improvement Association (including
Spirit & Long Trade Lakes) has been an active and enthusiastic leader in the pioneering efforts
at lake management in Wisconsin. The four lakes along the Trade River have exhibited signs of
excess fertility for decades. A history of chemical treatment efforts is noted in the files for
Long Trade (Atlas), Round and the Trade Lakes (Big & Little).

The signs of eutrophication are evident on these waters but a definitive nutrient and hydraulic
budget has not been documented. A feasibility study to evaluate the hydraulic and nutrient
loading to the lakes as well as in-lake monitoring to determine recycling and profile
characteristics is a high priority for these lakes. A lakes planning grant or possibly a Clean
Lakes grant study is a possibility.

WRM district staff have been working with this lake group to start the process towards a long
range lake management plan. Self-help volunteers are in place on all four lakes and Round
Lake was one of the original "expanded" monitoring group.

Date  1992

Author   Surface Water Inventory Of Wisconsin

Historical Description

Source: 1966, Surface Water Resources of Burnett County Trade Lake, T37N, R18W, Sections 20, 21, 28, 29 Surface Acres = 432.1, Maximum Depth = 34 feet, M.P.A. = 91 ppm, Secchi Disk = 3 feet A hard water, drainage lake on the Trade River. Estimated outlet flow is approximately 23.7 cubic feet per second. Fish species present include northern pike, walleye, largemouth bass, bluegill, black crappie, perch, rock bass, pumpkinseed, bullhead, carp, white sucker and bowfin. Carp are a problem. Lakeshore vegetation is upland except for 32 acres of wetlands which provide habitat for muskrats, nesting mallards, blue-winged teal and wood ducks. Migratory diving ducks also use the lake. A town road access with parking is provided on the southern most part of the lake. There is 0.49 miles of public frontage which includes the access, an undeveloped platted access, state-owned island frontage and other state land. Private development consists of one resort, two boat rentals and 87 cottages.

Date  1966

Author   Surface Water Inventory Of Wisconsin

Big Trade Lake, Trade River Watershed (SC10) Fish and Aquatic LifeBig Trade Lake, Trade River Watershed (SC10) RecreationBig Trade Lake, Trade River Watershed (SC10) Fish Consumption

Impaired Waters

Big Trade Lake was evaluated for phosphorus and algae every two years between 2018 and 2022. Phosphorus levels were found to be too high as shown by algal blooms.

Date  2022

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.


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 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

Big Trade Lake is located in the Trade River watershed which is 194.93 miĀ². Land use in the watershed is primarily forest (56.40%), wetland (18.80%) and a mix of grassland (11.70%) and other uses (13.10%). This watershed has 166.68 stream miles, 2,902.48 lake acres and 21,757.05 wetland acres.

Nonpoint Source Characteristics

This watershed is ranked Medium 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.This water is ranked High Lake for individual Lakes based on runoff problems and the likelihood of success from project implementation.

Natural Community

Big Trade Lake is considered a Deep Lowland 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.

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