Lake Of The Woods Dam
Lake Of The Woods Dam is an earth dam located in Champaign County, Illinois, built in 1940. It carries a Significant hazard potential classification.
About Lake Of The Woods Dam
The primary purpose of Lake Of The Woods Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Champaign County Forest Preserve Dist. (local government). It impounds the Trib Sangamon River near Mahomet-offstream.
The dam stands 30 feet tall and stretches 850 feet across, creates a reservoir covering 28 acres, has a maximum storage capacity of 323 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1940, the structure is well-established, with more than 75 years of service.
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 10/11/2024.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Illinois |
| County | Champaign |
| Nearest City | Mahomet-offstream |
| River/Stream | Trib Sangamon River |
| Coordinates | 40.20047, -88.38262 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 850 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 323 acre-ft |
| Max Storage | 323 acre-ft |
| Normal Storage | 232 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 960 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | CHAMPAIGN COUNTY FOREST PRESERVE DIST. |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 10/11/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL00511 |
| Federal ID | IL00511 |
| More Info | State Dam Safety Program |