Monee Reservoir Dam
Monee Reservoir Dam is an earth dam located in Will County, Illinois, built in 1900. It carries a Significant hazard potential classification.
About Monee Reservoir Dam
The primary purpose of Monee Reservoir Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Forest Preserve District Of Will County (local government). It impounds the Trib Rock Creek near Pectone-offstream.
The dam stands 29 feet tall and stretches 2,400 feet across, and has a maximum storage capacity of 650 acre-feet. Completed in 1900, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 05/29/2024.
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Location
| State | Illinois |
| County | Will |
| Nearest City | Pectone-offstream |
| River/Stream | Trib Rock Creek |
| Coordinates | 41.38988, -87.76015 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 2,400 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 650 acre-ft |
| Max Storage | 650 acre-ft |
| Normal Storage | 320 acre-ft |
| Max Discharge | 251 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | FOREST PRESERVE DISTRICT OF WILL COUNTY |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 05/29/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL00566 |
| Federal ID | IL00566 |
| More Info | State Dam Safety Program |