Leach Dam is an earth dam located in Sheridan County, Nebraska, built in 1950. It carries a Significant hazard potential classification.
Dam profile
NID height · 39 ft39 ft tall and 385 ft long, taller than 85% 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 Leach Dam
The primary purpose of Leach 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 Stephen W & Melissa a Johndreau (private). It impounds the Tr-niobrara River near Niobrara.
The dam stands 39 feet tall and stretches 385 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 41 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1950, the structure is well-established, with more than 75 years of service.
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. The most recent inspection on record was 05/10/2023.
At 39 feet, this dam is taller than 85% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Nebraska |
| County | Sheridan |
| Nearest City | Niobrara |
| River/Stream | Tr-niobrara River |
| Coordinates | 42.63227, -102.21291 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 385 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 41 acre-ft |
| Max Storage | 41 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Stephen W & Melissa a Johndreau |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 05/10/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE00673 |
| Federal ID | NE00673 |
| More Info | State Dam Safety Program |