Flat Lake is an earth dam located in Becker County, Minnesota, built in 1941. It carries a Low hazard potential classification.
Dam profile
NID height · 8 ft8 ft tall and 330 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Flat Lake
The primary purpose of Flat Lake is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by USFWS (federal). It impounds the Egg River near Frazee.
The dam stands 8 feet tall and stretches 330 feet across, creates a reservoir covering 1,754 acres, has a maximum storage capacity of 12,100 acre-feet, and collects water from a drainage area of 33 square miles. Completed in 1941, 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.
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Location
| State | Minnesota |
| County | Becker |
| Nearest City | Frazee |
| River/Stream | Egg River |
| Coordinates | 46.98466, -95.63395 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 6 ft |
| Dam Length | 330 ft |
| Year Completed | 1941 (85 years old) |
Storage & Hydraulics
| NID Storage | 12,100 acre-ft |
| Max Storage | 12,100 acre-ft |
| Normal Storage | 5,020 acre-ft |
| Surface Area | 1,754 acres |
| Drainage Area | 33 sq mi |
| Max Discharge | 1,299 cfs |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | USFWS |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00616 |
| Federal ID | MN00616 |
| More Info | State Dam Safety Program |