Deer Park Lake Dam
Deer Park Lake Dam is an arch dam located in LaSalle County, Illinois, built in 1910. It carries a Significant hazard potential classification.
About Deer Park Lake Dam
The primary purpose of Deer Park Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Illinois Department Of Natural Resources (private). It impounds the Trib Vermillion River near Oglesby-offstream.
The dam stands 55 feet tall and stretches 125 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 314 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1910, 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 11/08/2023.
At 55 feet, this dam is taller than 94% of dams nationwide.
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Location
| State | Illinois |
| County | LaSalle |
| Nearest City | Oglesby-offstream |
| River/Stream | Trib Vermillion River |
| Coordinates | 41.29906, -89.02511 |
Physical Characteristics
| Dam Type | Arch |
| NID Height | 55 ft |
| Dam Height | 55 ft |
| Dam Length | 125 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 314 acre-ft |
| Max Storage | 314 acre-ft |
| Normal Storage | 110 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 5,549 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | ILLINOIS DEPARTMENT OF NATURAL RESOURCES |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 11/08/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL00455 |
| Federal ID | IL00455 |
| More Info | State Dam Safety Program |