O'connor Dam 2 is an earth dam located in Dawson County, Nebraska, built in 1955. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 9 ft9 ft tall and 144 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 O'connor Dam 2
O'connor Dam 2 is a dam in Dawson, Nebraska. The dam is owned by Lloyd Waller Feedlot Inc (private). It impounds the Tr-wood River near Sumner.
The dam stands 9 feet tall and stretches 144 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 71 acre-feet, and collects water from a drainage area of 2 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 11/22/2022.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Nebraska |
| County | Dawson |
| Nearest City | Sumner |
| River/Stream | Tr-wood River |
| Coordinates | 40.95308, -99.71793 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 144 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 71 acre-ft |
| Max Storage | 71 acre-ft |
| Normal Storage | 33 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,080 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Lloyd Waller Feedlot Inc |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 11/22/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01430 |
| Federal ID | NE01430 |
| More Info | State Dam Safety Program |