Lemmert Dam
Lemmert Dam is an earth dam located in Franklin County, Nebraska, built in 1972. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Lemmert Dam
The primary purpose of Lemmert 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 Franklin County (local government). It impounds the Tr-thompson Creek near Riverton.
The dam stands 32 feet tall and stretches 772 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 174 acre-feet, and collects water from a drainage area of 2 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 04/25/2023.
At 32 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Nebraska |
| County | Franklin |
| Nearest City | Riverton |
| River/Stream | Tr-thompson Creek |
| Coordinates | 40.18181, -98.91497 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 25 ft |
| Dam Length | 772 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 174 acre-ft |
| Max Storage | 174 acre-ft |
| Normal Storage | 8 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 343 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Franklin County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/25/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE00622 |
| Federal ID | NE00622 |
| More Info | State Dam Safety Program |