Upper Maple River Dam is an earth dam located in Steele County, North Dakota, built in 2015. It carries a Significant hazard potential classification.
Dam profile
NID height · 35 ft35 ft tall and 4,717 ft long, taller than 80% 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 Upper Maple River Dam
The primary purpose of Upper Maple River Dam 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 Maple-steele Joint Wrb (local government). It impounds the Maple River near N.
The dam stands 35 feet tall and stretches 4,717 feet across, has a maximum storage capacity of 9,953 acre-feet, and collects water from a drainage area of 58 square miles. Completed in 2015, the structure is relatively new.
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 11/04/2020.
At 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | North Dakota |
| County | Steele |
| Nearest City | N |
| River/Stream | Maple River |
| Coordinates | 47.24647, -97.73139 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 4717.4 ft |
| Year Completed | 2015 (11 years old) |
Storage & Hydraulics
| NID Storage | 9,953 acre-ft |
| Max Storage | 9,953 acre-ft |
| Drainage Area | 58 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Maple-steele Joint Wrb |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 11/04/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ND01122 |
| Federal ID | ND01122 |
| More Info | State Dam Safety Program |