Wilmington Dam
Wilmington Dam is a gravity dam located in Will County, Illinois, built in 1920. It carries a Low hazard potential classification.
About Wilmington Dam
The primary purpose of Wilmington Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Wilmington (local government). It impounds the Kankakee River near Wilmington.
The dam stands 12 feet tall and stretches 1,000 feet across, and has a maximum storage capacity of 1,200 acre-feet. Completed in 1920, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 12/20/2023.
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Location
| State | Illinois |
| County | Will |
| Nearest City | Wilmington |
| River/Stream | Kankakee River |
| Coordinates | 41.30058, -88.15139 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 1,200 acre-ft |
| Max Storage | 1,200 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | CITY OF WILMINGTON |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 12/20/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50319 |
| Federal ID | IL50319 |
| More Info | State Dam Safety Program |