Nine Lakes TMDL – Water Quality Model

Lead consultant to assist CMAP in finalizing an Illinois Environmental Protection Agency (IEPA) funded Total Maximum Daily Load (TMDL) plan for a 19,000-acre watershed that includes nine regionally significant lakes. Northwater developed the tools necessary to calculate non-point source pollution loading, identify effective BMP projects and locations and estimate water quality benefits of BMP implementation. To support the needs of CMAP, a customized SWAMM™ (Spatial Watershed Assessment and Management Model) was developed for the Cotton-Mutton Creek, Slocum Lake Drain/Fiddle Creek, and Tower Lakes Drain watershed.

The model estimated parcel level pollutant loading of nitrogen, phosphorus, sediment, chloride and fecal coliform bacteria and provided a platform to develop a BMP implementation plan to achieve the water quality improvement requirements of the TMDL.

Chicago Metropolitan Agency for Planning
Project Details
  • Location: Lake & McHenry Counties, Illinois
  • Client: Chicago Metropolitan Agency for Planning
  • Sector: Government