TMDL/303d Projects
Implement TMDL
Little Lake Wissota TMDL
2010
Active
42902710
The approval letter and decision document written by the EPA
Final TMDL Report
Final TMDL Report
Data Documentation Moon Bay and Little Lake Wissota Impaired Waters Listing Documentation, Chippewa County
TMDL Implementation
EPA has determined that Wisconsin's TMDLs for phosphorus and sediment meet the requirements of Section 303(d) of the Clean Water Act and EPA's implementing regulations set forth at 40 CFR Part 130. EPA approves one TMDL for phosphorus and one TMDL for sediment addressing two impairments in Little Lake Wissota.
Implementation Plan is needed.
TMDL (USEPA) Approved
EPA has determined that Wisconsin's TMDLs for phosphorus and sediment meet the requirements of Section 303(d) of the Clean Water Act and EPA's implementing regulations set forth at 40 CFR Part 130. EPA approves one TMDL for phosphorus and one TMDL for sediment addressing two impairments in Little Lake Wissota.
TMDL Development
TMDL Development for Little Lake Wissota addressing phosphorus and sediment. Little Lake Wissota is highly eutrophic with excessive concentrations of phosphorus and chlorophyll (a measure of algal densities) in its surface waters during the months of May through September (USACE 2004, Brakke 1997). Sediment and phosphorus from nonpoint sources of
pollution enter the lake primarily from the Paint Creek watershed.
TMDL Implementation
Little Lake Wissota is a 400-acre eutrophic embayment of Lake Wissota, an impoundment of the Chippewa River near Chippewa Falls, Wisconsin (Hydrologic Unit Code 07050005, Wisconsin Waterbody Identification Code 2152800). The embayment has a maximum depth of 43 feet and a drainage area of approximately 67 square miles. Paint Creek is the primary source of surface water inflow to Little Lake Wissota. The Little Lake Wissota watershed is located in the North Central Hardwood Forest Ecoregion (Omernick and Gallant, 1988). This EPA Ecoregion is characterized by nearly level to rolling glacial till plains, significant agricultural land use and lakes with phosphorus concentrations greater than 50 ppb, indicative of eutrophic conditions. The lake was placed on the Wisconsin 303(d) impaired waters list in 1998 with a high priority ranking due to eutrophication and pH criteria exceedances. In addition, recreational uses are limited during the summer due to poor water quality from excess phosphorus (P) and sediment loading. Land cover in the watershed is primarily agricultural and forest. The goal of this TMDL is to reduce levels of phosphorus and sediment loading and decrease the extent and severity of summer algal blooms in Little Lake Wissota.