Lake Diane Dam
Lake Diane Dam is an earth dam located in Hillsdale County, Michigan, built in 1966. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Lake Diane Dam
The primary purpose of Lake Diane Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Hillsdale County Drain Commissioner (private). It impounds the Tributary To Clark Fork Creek near Pioneer Ohio.
The dam stands 19 feet tall and stretches 190 feet across, creates a reservoir covering 290 acres, has a maximum storage capacity of 3,200 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1966, the structure is well into its service life at over 50 years 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/24/2019.
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Location
| State | Michigan |
| County | Hillsdale |
| Nearest City | Pioneer Ohio |
| River/Stream | Tributary To Clark Fork Creek |
| Coordinates | 41.71667, -84.65333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 190 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 3,200 acre-ft |
| Max Storage | 3,200 acre-ft |
| Normal Storage | 1,700 acre-ft |
| Surface Area | 290 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 227 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Hillsdale County Drain Commissioner |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/24/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MI00416 |
| Federal ID | MI00416 |
| More Info | State Dam Safety Program |