Ellis Dam is an earth dam located in Red Willow County, Nebraska, built in 1960. It carries a Low hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 300 ft long. 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 Ellis Dam
The primary purpose of Ellis 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 William Ellis (private). It impounds the Tr-beaver Creek near Wilsonville.
The dam stands 18 feet tall and stretches 300 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 88 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1960, 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. The most recent inspection on record was 12/11/2023.
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Location
| State | Nebraska |
| County | Red Willow |
| Nearest City | Wilsonville |
| River/Stream | Tr-beaver Creek |
| Coordinates | 40.09380, -100.25307 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 300 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 88 acre-ft |
| Max Storage | 88 acre-ft |
| Normal Storage | 65 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | William Ellis |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 12/11/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE03473 |
| Federal ID | NE03473 |
| More Info | State Dam Safety Program |