Grass Lake Dam
Grass Lake Dam is a gravity dam located in Benzie County, Michigan, built in 1951. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Grass Lake Dam
The primary purpose of Grass Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mdnr Wildlife (state). It impounds the Betsie River near Wallin.
The dam stands 8 feet tall and stretches 176 feet across, creates a reservoir covering 482 acres, has a maximum storage capacity of 5,200 acre-feet, and collects water from a drainage area of 77 square miles. Completed in 1951, the structure is well into its service life at over 50 years old.
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 10/28/2014. That was over 11 years ago.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Michigan |
| County | Benzie |
| Nearest City | Wallin |
| River/Stream | Betsie River |
| Coordinates | 44.59167, -85.84833 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 176 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 5,200 acre-ft |
| Max Storage | 5,200 acre-ft |
| Normal Storage | 675 acre-ft |
| Surface Area | 482 acres |
| Drainage Area | 77 sq mi |
| Max Discharge | 1,600 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | MDNR Wildlife |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/28/2014 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00527 |
| Federal ID | MI00527 |
| More Info | State Dam Safety Program |