Larson Dam 1289 is an earth dam located in Lancaster County, Nebraska, built in 1972. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 25 ft25 ft tall and 415 ft long, taller than 50% 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 Larson Dam 1289
Larson Dam 1289 is a dam in Lancaster, Nebraska. The dam is owned by Lancaster County (local government). It impounds the Tr-little Rock Creek near Greenwood.
The dam stands 25 feet tall and stretches 415 feet across, creates a reservoir covering 0 acres, has a maximum storage capacity of 33 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1972, 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 05/24/2022.
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Location
| State | Nebraska |
| County | Lancaster |
| Nearest City | Greenwood |
| River/Stream | Tr-little Rock Creek |
| Coordinates | 41.04578, -96.74141 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 415 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 33 acre-ft |
| Max Storage | 33 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 229 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Lancaster County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/24/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01289 |
| Federal ID | NE01289 |
| More Info | State Dam Safety Program |