Herman Dam is an earth dam located in Washington County, Nebraska, built in 1952. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 28 ft28 ft tall and 860 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 Herman Dam
The primary purpose of Herman 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 Washington County (private). It impounds the Tr-missouri River near Herman.
The dam stands 28 feet tall and stretches 860 feet across, creates a reservoir covering 0 acres, has a maximum storage capacity of 106 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1952, 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/03/2023.
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Location
| State | Nebraska |
| County | Washington |
| Nearest City | Herman |
| River/Stream | Tr-missouri River |
| Coordinates | 41.65916, -96.22870 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 860 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 106 acre-ft |
| Max Storage | 106 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 56 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Washington County |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 05/03/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE08505 |
| Federal ID | NE08505 |
| More Info | State Dam Safety Program |