Yanktonai Dam is an earth dam located in McLean County, North Dakota, built in 1935. It carries a Significant hazard potential classification.
Dam profile
NID height · 21 ft21 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 Yanktonai Dam
The primary purpose of Yanktonai Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mclean County Wrb (local government). It impounds the Yanktonai Creek near N.
The dam stands 21 feet tall and stretches 400 feet across, creates a reservoir covering 200 acres, has a maximum storage capacity of 600 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1935, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 10/27/2022.
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Location
| State | North Dakota |
| County | McLean |
| Nearest City | N |
| River/Stream | Yanktonai Creek |
| Coordinates | 47.17691, -100.86816 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 400 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 600 acre-ft |
| Max Storage | 600 acre-ft |
| Normal Storage | 600 acre-ft |
| Surface Area | 200 acres |
| Drainage Area | 12 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Mclean County Wrb |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 10/27/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ND00094 |
| Federal ID | ND00094 |
| More Info | State Dam Safety Program |