Wilson Creek 11-a
Wilson Creek 11-a is an earth dam located in Cass County, Nebraska, built in 1974. It carries a Low hazard potential classification and has a poor condition assessment.
About Wilson Creek 11-a
The primary purpose of Wilson Creek 11-a 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 Nemaha Natural Resources District (local government). It impounds the Tr-n Fk Little Nemaha River near Otoe.
The dam stands 33 feet tall and stretches 1,110 feet across, creates a reservoir covering 56 acres, has a maximum storage capacity of 1,588 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1974, 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 09/26/2019.
At 33 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Nebraska |
| County | Cass |
| Nearest City | Otoe |
| River/Stream | Tr-n Fk Little Nemaha River |
| Coordinates | 40.79045, -96.24020 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 32 ft |
| Dam Length | 1,110 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 1,588 acre-ft |
| Max Storage | 1,588 acre-ft |
| Normal Storage | 264 acre-ft |
| Surface Area | 56 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 1,770 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 09/26/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01248 |
| Federal ID | NE01248 |
| More Info | State Dam Safety Program |