KISHWAUKEE WATERSHED (HUC 0709006)

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.

 

Kishwaukee Watershed

Project Initiation Community Coordination Meeting
6/18/2022

 

Press Releases

Water Survey to analyze flood risks in Boone, DeKalb, Ogle, and Winnebago counties

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The information below is for historical reference.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 Material, November 2018

 

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About the Kishwaukee River

The 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.

colored aras of Kishwaukee River watershed
Click for full-size watershed map
 

Illinois counties with ongoing data development or mapping:

Kane
McHenry
Winnebago