Des Lacs Dam 7a is an earth dam located in Ward County, North Dakota, built in 1937. It carries a Low hazard potential classification.
Dam profile
NID height · 9 ft9 ft tall and 2,453 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 Des Lacs Dam 7a
The primary purpose of Des Lacs Dam 7a 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 Des Lacs River near Donnybrook.
The dam stands 9 feet tall and stretches 2,453 feet across, creates a reservoir covering 437 acres, has a maximum storage capacity of 4,486 acre-feet, and collects water from a drainage area of 661 square miles. Completed in 1937, 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. The most recent inspection on record was 10/10/1988. That was over 38 years ago.
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Location
| State | North Dakota |
| County | Ward |
| Nearest City | Donnybrook |
| River/Stream | Des Lacs River |
| Coordinates | 48.59898, -102.00312 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 2,453 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 4,486 acre-ft |
| Max Storage | 4,486 acre-ft |
| Normal Storage | 2,749 acre-ft |
| Surface Area | 437 acres |
| Drainage Area | 661 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | USFWS |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/10/1988 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ND00323 |
| Federal ID | ND00323 |
| More Info | State Dam Safety Program |