Lewis Dam 3714 is an earth dam located in Franklin County, Nebraska, built in 1960. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 13 ft13 ft tall and 400 ft long. 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 Lewis Dam 3714
The primary purpose of Lewis Dam 3714 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 Brook M Lewis Etal (private). It impounds the Tr-lohff Creek near Riverton.
The dam stands 13 feet tall and stretches 400 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 54 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1960, 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 07/20/2022.
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Location
| State | Nebraska |
| County | Franklin |
| Nearest City | Riverton |
| River/Stream | Tr-lohff Creek |
| Coordinates | 40.01904, -98.82568 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 400 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 28 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 2 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Brook M Lewis Etal |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 07/20/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE03714 |
| Federal ID | NE03714 |
| More Info | State Dam Safety Program |