Herzog Dam is an earth dam located in Pembina County, North Dakota, built in 1957. It carries a Significant hazard potential classification.
Dam profile
NID height · 46 ft46 ft tall and 794 ft long, taller than 91% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Herzog Dam
The primary purpose of Herzog 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 Pembina County Wrb (local government). It impounds the Tongue River-tr near Hallson.
The dam stands 46 feet tall and stretches 794 feet across, creates a reservoir covering 18 acres, has a maximum storage capacity of 2,430 acre-feet, and collects water from a drainage area of 16 square miles. Completed in 1957, 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 09/25/2019.
At 46 feet, this dam is taller than 91% of dams nationwide.
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Location
| State | North Dakota |
| County | Pembina |
| Nearest City | Hallson |
| River/Stream | Tongue River-tr |
| Coordinates | 48.75203, -97.91941 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 46 ft |
| Dam Height | 38 ft |
| Dam Length | 794 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 2,430 acre-ft |
| Max Storage | 2,430 acre-ft |
| Normal Storage | 80 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 16 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 | 09/25/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ND00051 |
| Federal ID | ND00051 |
| More Info | State Dam Safety Program |