Grass Lake Level Control Structure
Grass Lake Level Control Structure is an earth dam located in Montmorency County, Michigan, built in 1937. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Grass Lake Level Control Structure
The primary purpose of Grass Lake Level Control Structure is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Grass Lake Association (private). It impounds the Grass Creek near Alpena.
The dam stands 16 feet tall and stretches 200 feet across, creates a reservoir covering 382 acres, and has a maximum storage capacity of 3,360 acre-feet. Completed in 1937, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 09/13/2018.
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Location
| State | Michigan |
| County | Montmorency |
| Nearest City | Alpena |
| River/Stream | Grass Creek |
| Coordinates | 45.13167, -84.00500 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 200 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 3,360 acre-ft |
| Max Storage | 3,360 acre-ft |
| Normal Storage | 1,495 acre-ft |
| Surface Area | 382 acres |
| Max Discharge | 185 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Grass Lake Association |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/13/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00147 |
| Federal ID | MI00147 |
| More Info | State Dam Safety Program |