Pisgah
Pisgah is a gravity dam located in Otter Tail County, Minnesota, built in 1918. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Pisgah
The primary purpose of Pisgah is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Otter Tail Power Company (public utility). It impounds the Ottertail River near Unincorp / Fergus Falls.
The dam stands 38 feet tall and stretches 493 feet across, creates a reservoir covering 70 acres, has a maximum storage capacity of 250 acre-feet, and collects water from a drainage area of 1,355 square miles. Completed in 1918, the structure is over a century 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. An emergency action plan is in place for this dam. The most recent inspection on record was 09/22/2022.
At 38 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Minnesota |
| County | Otter Tail |
| Nearest City | Unincorp / Fergus Falls |
| River/Stream | Ottertail River |
| Coordinates | 46.27950, -96.10300 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 38 ft |
| Dam Height | 26 ft |
| Dam Length | 493 ft |
| Year Completed | 1918 (108 years old) |
Storage & Hydraulics
| NID Storage | 250 acre-ft |
| Max Storage | 250 acre-ft |
| Normal Storage | 200 acre-ft |
| Surface Area | 70 acres |
| Drainage Area | 1,355 sq mi |
| Max Discharge | 2,430 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Otter Tail Power Company |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/22/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MN00197 |
| Federal ID | MN00197 |
| More Info | State Dam Safety Program |