The Kishwaukee River Watershed is located in northern Illinois and includes waterways that flow across seven counties: Winnebago, Boone, McHenry, DeKalb, Lee and Kane.
Illinois State Water Survey (ISWS) hydrologic and hydraulic modeling in Boone, DeKalb, Ogle and Winnebago Counties is underway as part of a study to help local communities identify areas of high flood risk for flood mitigation planning. ISWS is working collaboratively on the project with the Illinois Department of Natural Resources-Office of Water Resources (IDNR-OWR) and the Federal Emergency Management Agency (FEMA). The first phase of the project, data collection, began in early 2022.
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Download MP4 (187 MB) Meeting Presentation (PDF) Watch Video (hosted on Illinois Media Space) Download MP4 (115 MB) Meeting Presentation (PDF) Watch Video (hosted on Illinois Media Space) Download MP4 (270 MB) Meeting Presentation (PDF) Download MP4 (457 MB)Jul 6, 2023
Illinois State Water Survey (ISWS) hydrologic and hydraulic modeling in DeKalb County, Illinois, is underway as part of a study to help local communities identify areas of high flood risk for flood mitigation planning.
Jan 27, 2022
Illinois State Water Survey (ISWS) hydrologic and hydraulic modeling in Boone, DeKalb, Ogle and Winnebago Counties, Illinois is underway as part of a study to help local communities identify areas of high flood risk for flood mitigation planning.
The information below is for historical reference. The Discovery process for this watershed is complete and the data is considered archival.
Discovery Report (ZIP) Discovery Database (ZIP) Discovery Map for Kishwaukee River Watershed (PDF) Discovery Map Data Layers (PDF) Discovery Meeting Presentations (PDF) Links to Discovery-related Websites (PDF) RiskMAP Data Request Form (PDF)
Story Map regarding 2018 Flooding Story Map showing changes in Municipal Boundaries 1990 - 2018The average width of the Kishwaukee River is 80 feet with a gradient of 1.5 feet per mile. The river flows unimpeded from its source to the Rock River, except for a small dam at Belvidere. Since 1970 there has been a significant jump in the average annual flow in the Kishwaukee Basin, with more than a 50% increase over previous average flows. This watershed covers an area of approximately 1,257 square miles.
Illinois counties with ongoing data development or mapping:
Boone
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