Nothnagel Dam 1 is an earth dam located in Red Willow County, Nebraska, built in 1939. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 29 ft29 ft tall and 850 ft long, taller than 65% 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 Nothnagel Dam 1
The primary purpose of Nothnagel Dam 1 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 Red Willow County (local government). It impounds the Tr-brushy Creek near Indianola.
The dam stands 29 feet tall and stretches 850 feet across, has a maximum storage capacity of 79 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1939, the structure is well-established, with more than 75 years of service.
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 04/27/2020.
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Location
| State | Nebraska |
| County | Red Willow |
| Nearest City | Indianola |
| River/Stream | Tr-brushy Creek |
| Coordinates | 40.11935, -100.60084 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 850 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 79 acre-ft |
| Max Storage | 79 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 450 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Red Willow County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 04/27/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01381 |
| Federal ID | NE01381 |
| More Info | State Dam Safety Program |