Corunna Dam
Corunna Dam is a timber crib dam located in Shiawassee County, Michigan, built in 1843. It carries a Significant hazard potential classification and has a unsatisfactory condition assessment.
About Corunna Dam
The primary purpose of Corunna 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 Corunna (local government). It impounds the Shiawassee River near Corunna.
The dam stands 15 feet tall and stretches 200 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 80 acre-feet, and collects water from a drainage area of 507 square miles. Completed in 1843, the structure is one of the older dams in the region, with over a century and a half 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. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. An emergency action plan is in place for this dam. The most recent inspection on record was 08/28/2009. That was over 16 years ago.
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Location
| State | Michigan |
| County | Shiawassee |
| Nearest City | Corunna |
| River/Stream | Shiawassee River |
| Coordinates | 42.98573, -84.11793 |
Physical Characteristics
| Dam Type | Timber Crib |
| NID Height | 15 ft |
| Dam Height | 10 ft |
| Dam Length | 200 ft |
| Year Completed | 1843 (183 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 60 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 507 sq mi |
| Max Discharge | 3,700 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Corunna |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 08/28/2009 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MI00379 |
| Federal ID | MI00379 |
| More Info | State Dam Safety Program |