Lake Mauvaise Terre is located in Morgan County, Illinois and is a water supply for the City of Jacksonville. It is impaired for numerous constituents, including phosphorus and sediment. The project was unique and challenging due to its location, its lake pollution issues, and private land ownership. The AFT received a grant to conduct activities in the watershed aimed at reducing pollution loading to the lake. Northwater worked with AFT, the city and watershed stakeholders to model pollution loading, identify treatment practices and develop a Watershed Implementation Plan.
Roles included advanced GIS analysis and mapping, a custom map-based pollution load model, and the identified over 280 site-specific implementation projects. Expected pollution load reductions associated with recommended actions were calculated and practices were negotiated one-on-one with landowners. Northwater also performed a field assessment of watershed conditions, developed a monitoring plan and wrote a $700,000 Illinois EPA Section 319 grant application. To support the grant application, Northwater was able to secure a financial commitment from the city as well as each landowner; it encompassed over 200 projects with 12 landowners resulting in annual pollutant reductions to the lake totaling 1,773 tons of sediment, 4,131 lbs. of phosphorus, and 15,650 lbs. nitrogen.
Northwater managed the successful plan implementation and completed a complimentary assessment, read more…
Lake Mauvaise Terre Nutrient Reduction Initiative – Plan Implementation & Construction
Lake Mauvaise Terre Streambank Erosion & In-lake Dam Assessment