Lehmann Pond is an earth dam located in Becker County, Minnesota, built in 1968. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 13 ft13 ft tall and 400 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 Lehmann Pond
The primary purpose of Lehmann Pond is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Lehman, Gary (private). It impounds the Otter Tail River-tr near Rochert.
The dam stands 13 feet tall and stretches 400 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 250 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1968, the structure is well into its service life at over 50 years 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 08/01/2018.
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Location
| State | Minnesota |
| County | Becker |
| Nearest City | Rochert |
| River/Stream | Otter Tail River-tr |
| Coordinates | 46.90531, -95.52618 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 12 ft |
| Dam Length | 400 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 250 acre-ft |
| Max Storage | 250 acre-ft |
| Normal Storage | 250 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 140 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Lehman, Gary |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/01/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00488 |
| Federal ID | MN00488 |
| More Info | State Dam Safety Program |