Lake Decatur’s water comes from a watershed (or drainage area) that is 925 square miles in size and includes parts of 7 counties in east central Illinois.  In order to preserve the recently completed $92 million Lake Decatur dredging project investment and improve the lake’s water quality, in February 2020, the Decatur City Council authorized that a comprehensive long term watershed management plan be created.  Northwater Consulting of Springfield, Illinois was selected to complete the plan.  Documents posted here provide more information about the plan.

2021 Lake Decatur Watershed Management Plan & Initiative Long Term Strategy  added 5/11/2021

2021 Lake Decatur Water Quality Initiative and USDA RCPP Grant Application Fact Sheet  added 3/10/2021

2021 Sequencing Map for Lake Decatur Subwatershed Planning  added 3/10/2021

September 2020 Phase II Scope of Services and Budget with Northwater Consulting

September 2020 Executive Briefing

August 2020 News Release

July 2020 Watershed Management Plan Fact Sheet

Lake Decatur Watershed Management Plan Scope of Services with Northwater Consulting