This project will develop a TMDL for all impaired lakes within the Crow Wing Watershed by furthering data collection in the watershed, analysis of data, allocation calculations, and introducing outreach and stakeholder participation activities.
The north-central Minnesota counties of Cass and Hubbard share large portions of the Crow Wing River, Leech and Upper Mississippi Watersheds, all of which play an important role in providing clean drinking water to over one million Minnesota residents. Each county assumes the responsibility of inspecting and evaluating the judicial and county ditch systems that drain directly into these watersheds. The two counties together share two judicial ditch systems and combined have an additional 42 ditches within their borders.
The Statewide Sediment Network was established to measure the levels of suspended sediment concentrations and particle size distributions at eight sites across Minnesota to evaluate the amount of sediment carried by rivers. USGS sample collection and laboratory analysis techniques provide a more rigorous, robust, and technically accurate measure of sediment in water than the current use of total suspended solids as the measure of sediment in water.
The primary goal of this project is to examine the calibration and validation of recently extended Hydrological Simulation Program – FORTRAN (HSPF) watershed models for the Mississippi River-Headwaters, Mississippi River-Grand Rapids, Mississippi River-Brainerd, Mississippi River-Sartell, Mississippi River-St. Cloud, Leech Lake, Pine River, Crow Wing River, Long Prairie River, and Redeye River watersheds and revise the calibration.