Flowage Lake Dam
Flowage Lake Dam is an earth dam located in Ogemaw County, Michigan, built in 1997. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Flowage Lake Dam
The primary purpose of Flowage Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Ogemaw County Drain Commissioner (private). It impounds the Rifle River near West Branch.
The dam stands 27 feet tall and stretches 250 feet across, creates a reservoir covering 35 acres, has a maximum storage capacity of 380 acre-feet, and collects water from a drainage area of 42 square miles. Completed in 1997, the structure is 29 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 08/28/2020.
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Location
| State | Michigan |
| County | Ogemaw |
| Nearest City | West Branch |
| River/Stream | Rifle River |
| Coordinates | 44.26389, -84.20556 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 250 ft |
| Year Completed | 1997 (29 years old) |
Storage & Hydraulics
| NID Storage | 380 acre-ft |
| Max Storage | 380 acre-ft |
| Normal Storage | 280 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 42 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Ogemaw County Drain Commissioner |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/28/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MI02579 |
| Federal ID | MI02579 |
| More Info | State Dam Safety Program |