Otter Tail Lake
Otter Tail Lake is a gravity dam located in Otter Tail County, Minnesota, built in 1936. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Otter Tail Lake
Otter Tail Lake is a dam in Otter Tail, Minnesota. The dam is owned by Mndnr-ewr (state). It impounds the Otter Tail River near Phelps.
The dam stands 10 feet tall and stretches 125 feet across, creates a reservoir covering 14,745 acres, has a maximum storage capacity of 557,200 acre-feet, and collects water from a drainage area of 1,160 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 08/31/2017.
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Location
| State | Minnesota |
| County | Otter Tail |
| Nearest City | Phelps |
| River/Stream | Otter Tail River |
| Coordinates | 46.35911, -95.73350 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 10 ft |
| Dam Height | 6 ft |
| Dam Length | 125 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 557,200 acre-ft |
| Max Storage | 557,200 acre-ft |
| Normal Storage | 506,000 acre-ft |
| Surface Area | 14,745 acres |
| Drainage Area | 1,160 sq mi |
| Max Discharge | 4,372 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | MNDNR-EWR |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/31/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00209 |
| Federal ID | MN00209 |
| More Info | State Dam Safety Program |