Long Lake is an other dam located in Douglas County, Minnesota, built in 1938. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 8 ft8 ft tall and 35 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 Long Lake
The primary purpose of Long 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 Chippewa River near Hoffman.
The dam stands 8 feet tall and stretches 35 feet across, creates a reservoir covering 218 acres, has a maximum storage capacity of 2,255 acre-feet, and collects water from a drainage area of 143 square miles. Completed in 1938, 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 08/29/2018.
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Location
| State | Minnesota |
| County | Douglas |
| Nearest City | Hoffman |
| River/Stream | Chippewa River |
| Coordinates | 45.95855, -95.69794 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 8 ft |
| Dam Height | 6 ft |
| Dam Length | 35 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 2,255 acre-ft |
| Max Storage | 2,255 acre-ft |
| Normal Storage | 1,640 acre-ft |
| Surface Area | 218 acres |
| Drainage Area | 143 sq mi |
| Max Discharge | 1,470 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Mndnr |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/29/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00171 |
| Federal ID | MN00171 |
| More Info | State Dam Safety Program |