Mathiesen Dam 159 is an earth dam located in Washington County, Nebraska, built in 1968. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 31 ft31 ft tall and 300 ft long, taller than 72% 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 Mathiesen Dam 159
Mathiesen Dam 159 is a dam in Washington, Nebraska. The dam is owned by Washington County (local government). It impounds the New York Creek near Herman.
The dam stands 31 feet tall and stretches 300 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 125 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1968, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected 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 06/10/2020.
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Location
| State | Nebraska |
| County | Washington |
| Nearest City | Herman |
| River/Stream | New York Creek |
| Coordinates | 41.62093, -96.29031 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 300 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 125 acre-ft |
| Max Storage | 125 acre-ft |
| Normal Storage | 6 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 6 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Washington County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/10/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE00159 |
| Federal ID | NE00159 |
| More Info | State Dam Safety Program |