O'connor Dam 1
O'connor Dam 1 is an earth dam located in Dawson County, Nebraska, built in 1957. It carries a Low hazard potential classification and has a poor condition assessment.
About O'connor Dam 1
O'connor Dam 1 is a dam in Dawson, Nebraska. The dam is owned by Alan And Catherine A Seberger (private). It impounds the Tr-wood River near Sumner.
The dam stands 13 feet tall and stretches 199 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 72 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1957, 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 11/22/2022.
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Location
| State | Nebraska |
| County | Dawson |
| Nearest City | Sumner |
| River/Stream | Tr-wood River |
| Coordinates | 40.94809, -99.72793 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 199 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 72 acre-ft |
| Max Storage | 72 acre-ft |
| Normal Storage | 29 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,190 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Alan and Catherine A Seberger |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 11/22/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01429 |
| Federal ID | NE01429 |
| More Info | State Dam Safety Program |