Bowman-spring Branch 1-a is an earth dam located in Thayer County, Nebraska, built in 1962. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 36 ft36 ft tall and 1,000 ft long, taller than 82% 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 Bowman-spring Branch 1-a
The primary purpose of Bowman-spring Branch 1-a 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 Little Blue Natural Resources District (local government). It impounds the Tr-bowman Creek near Hubbell.
The dam stands 36 feet tall and stretches 1,000 feet across, creates a reservoir covering 28 acres, has a maximum storage capacity of 854 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1962, the structure is well into its service life at over 50 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 04/13/2021.
At 36 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | Nebraska |
| County | Thayer |
| Nearest City | Hubbell |
| River/Stream | Tr-bowman Creek |
| Coordinates | 40.01142, -97.52119 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Height | 26 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 854 acre-ft |
| Max Storage | 854 acre-ft |
| Normal Storage | 132 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,555 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Little Blue Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/13/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE00446 |
| Federal ID | NE00446 |
| More Info | State Dam Safety Program |