Wendell Johnson Dam
Wendell Johnson Dam is an earth dam located in Adams County, Nebraska, built in 1990. It carries a Low hazard potential classification and has a fair condition assessment.
About Wendell Johnson Dam
The primary purpose of Wendell Johnson 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 Wendell E & Dian R Johnson (private). It impounds the Tr-cottonwood Creek near Ayr.
The dam stands 27 feet tall and stretches 575 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 74 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1990, the structure is 36 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 03/30/2021.
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Location
| State | Nebraska |
| County | Adams |
| Nearest City | Ayr |
| River/Stream | Tr-cottonwood Creek |
| Coordinates | 40.42770, -98.58750 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 23 ft |
| Dam Length | 575 ft |
| Year Completed | 1990 (36 years old) |
Storage & Hydraulics
| NID Storage | 74 acre-ft |
| Max Storage | 74 acre-ft |
| Normal Storage | 27 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 74 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Wendell E & Dian R Johnson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 03/30/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE02335 |
| Federal ID | NE02335 |
| More Info | State Dam Safety Program |