Pine Mountain Lake
Pine Mountain Lake is a gravity dam located in Cass County, Minnesota, built in 1936. It carries a Low hazard potential classification.
About Pine Mountain Lake
The primary purpose of Pine Mountain Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mndnr (state). It impounds the Pine River near Backus.
The dam stands 7 feet tall and stretches 45 feet across, creates a reservoir covering 1,612 acres, has a maximum storage capacity of 126,737 acre-feet, and collects water from a drainage area of 44 square miles. Completed in 1936, 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. The most recent inspection on record was 07/18/2024.
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Location
| State | Minnesota |
| County | Cass |
| Nearest City | Backus |
| River/Stream | Pine River |
| Coordinates | 46.80292, -94.52045 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 7 ft |
| Dam Height | 6 ft |
| Dam Length | 45 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 126,737 acre-ft |
| Max Storage | 126,737 acre-ft |
| Normal Storage | 122,120 acre-ft |
| Surface Area | 1,612 acres |
| Drainage Area | 44 sq mi |
| Max Discharge | 1,225 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | MNDNR |
| Owner Type | State |
| Hazard Classification | Low |
| Last Inspection | 07/18/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00033 |
| Federal ID | MN00033 |
| More Info | State Dam Safety Program |