Long Branch 71 is an earth dam located in Johnson County, Nebraska, built in 1980. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 32 ft32 ft tall and 1,110 ft long, taller than 74% 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 Long Branch 71
The primary purpose of Long Branch 71 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 Nemaha Natural Resources District (local government). It impounds the Long Branch near Humboldt.
The dam stands 32 feet tall and stretches 1,110 feet across, creates a reservoir covering 24 acres, has a maximum storage capacity of 980 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1980, the structure is 46 years old.
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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 04/07/2022.
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Location
| State | Nebraska |
| County | Johnson |
| Nearest City | Humboldt |
| River/Stream | Long Branch |
| Coordinates | 40.34025, -96.09599 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 1,110 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 980 acre-ft |
| Max Storage | 980 acre-ft |
| Normal Storage | 98 acre-ft |
| Surface Area | 24 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 2,280 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/07/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01722 |
| Federal ID | NE01722 |
| More Info | State Dam Safety Program |