Richardson Dam 433 is an earth dam located in Keya Paha County, Nebraska, built in 1955. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 32 ft32 ft tall and 320 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 Richardson Dam 433
The primary purpose of Richardson Dam 433 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Heyden Brothers Partnership (private). It impounds the Br Spotted Tail Creek near Niobrara.
The dam stands 32 feet tall and stretches 320 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 111 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1955, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/05/2022.
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Location
| State | Nebraska |
| County | Keya Paha |
| Nearest City | Niobrara |
| River/Stream | Br Spotted Tail Creek |
| Coordinates | 42.96815, -99.30627 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 27 ft |
| Dam Length | 320 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 111 acre-ft |
| Max Storage | 111 acre-ft |
| Normal Storage | 54 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 371 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Heyden Brothers Partnership |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/05/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE00433 |
| Federal ID | NE00433 |
| More Info | State Dam Safety Program |