Special Flood Hazard Area, Information, Protection and Predictors
The City of Ottawa has three distinct Special Flood Hazard Areas (SFHA). The boundaries of Goose Creek east of Norris Drive, to the mouth at the Fox River, The Fox River from Ottawa Regional Hospital to the mouth at the Illinois and the areas adjacent to either side of the Illinois River from the eastern to western City limits.
The areas around Goose Creek are at greatest risk for flash flood events because of its steep declining profile. The Fox River is influenced not just by local rain events but by most of Northeastern Illinois and Southern Wisconsin. The Illinois River is influenced by east northeast Illinois, into parts of Western Indiana, the Kankakee River, the Des Plaines and Chicago Rivers. It is important to understand that Ottawa is the watershed for over 11,000 square miles.
Information on whether your property is in the 100-year floodplain can be obtained from the Building Official or City Engineer by checking the City of Ottawa’s Geographic Information System (GIS), which has all properties listed in the regulatory floodplain. Stop by City Hall at 301 West Madison Street or call the Community Development at 815-433-0161, ext. 19 or ext. 20.
If you have flooding or drainage problems on your property, contact the City Engineer for solutions. He can be reached at 815-433-0161 ex 20.
It is illegal to dump materials, yardwaste or debris into a required waterway and violators may be fined. (515 ILCS 5/5-5). If you see someone dumping debris in our water courses or suspect any other illegal activity, please contact Community Development at 815-433-0161.
- Flood Hazard Plan
- City of Ottawa Flood Information
- Fema’s National Flood Hazard Layer: Type in your address to see if you are in the floodplain
- Get Flood Insurance Quote Here: Flood Insurance Information
Early Warning Prediction Sites:
Links to Other Resources: