Mason Nelms Dam
Mason Nelms Dam is an earth dam located in Red Willow County, Nebraska, built in 1980. It carries a Low hazard potential classification and has a poor condition assessment.
About Mason Nelms Dam
The primary purpose of Mason Nelms 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 Mason A. & Kalli C. Nelms (private). It impounds the Tr-republican River near Indianola.
The dam stands 19 feet tall and stretches 220 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 119 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1980, the structure is 46 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 11/22/2023.
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Location
| State | Nebraska |
| County | Red Willow |
| Nearest City | Indianola |
| River/Stream | Tr-republican River |
| Coordinates | 40.23701, -100.45737 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 220 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 119 acre-ft |
| Max Storage | 119 acre-ft |
| Normal Storage | 36 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Mason A. & Kalli C. Nelms |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 11/22/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE03468 |
| Federal ID | NE03468 |
| More Info | State Dam Safety Program |