Willow Cr-park R Detdam#1 is an earth dam located in Pembina County, North Dakota, built in 1968. It carries a Significant hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 8,280 ft long, taller than 62% of U.S. dams with a recorded height. 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 Willow Cr-park R Detdam#1
The primary purpose of Willow Cr-park R Detdam#1 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 Pembina County Wrb (local government). It impounds the Willow Creek near St. Thomas.
The dam stands 28 feet tall and stretches 8,280 feet across, creates a reservoir covering 62 acres, has a maximum storage capacity of 3,219 acre-feet, and collects water from a drainage area of 18 square miles. Completed in 1968, the structure is well into its service life at over 50 years old.
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 11/03/2022.
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Location
| State | North Dakota |
| County | Pembina |
| Nearest City | St. Thomas |
| River/Stream | Willow Creek |
| Coordinates | 48.70811, -97.77804 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 24 ft |
| Dam Length | 8,280 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 3,219 acre-ft |
| Max Storage | 3,219 acre-ft |
| Normal Storage | 160 acre-ft |
| Surface Area | 62 acres |
| Drainage Area | 18 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Pembina County Wrb |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 11/03/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ND00079 |
| Federal ID | ND00079 |
| More Info | State Dam Safety Program |