Lake Hattie is a gravity dam located in Cass County, Minnesota, built in 1937. It carries a Low hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 55 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Lake Hattie
The primary purpose of Lake Hattie 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 Chickamaw Beach.
The dam stands 10 feet tall and stretches 55 feet across, creates a reservoir covering 484 acres, has a maximum storage capacity of 8,168 acre-feet, and collects water from a drainage area of 85 square miles. 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. The most recent inspection on record was 07/18/2024.
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Location
| State | Minnesota |
| County | Cass |
| Nearest City | Chickamaw Beach |
| River/Stream | Pine River |
| Coordinates | 46.80936, -94.39236 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 10 ft |
| Dam Height | 8 ft |
| Dam Length | 55 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 8,168 acre-ft |
| Max Storage | 8,168 acre-ft |
| Normal Storage | 6,716 acre-ft |
| Surface Area | 484 acres |
| Drainage Area | 85 sq mi |
| Max Discharge | 2,600 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Mndnr |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/18/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00034 |
| Federal ID | MN00034 |
| More Info | State Dam Safety Program |