Road 391 County Dam is an earth dam located in Frontier County, Nebraska, built in 1980. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 20 ft20 ft tall and 525 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 Road 391 County Dam
The primary purpose of Road 391 County 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 Frontier County (local government). It impounds the Tr-coon Creek near Indianola.
The dam stands 20 feet tall and stretches 525 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 158 acre-feet, and collects water from a drainage area of 1 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 06/28/2023.
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Location
| State | Nebraska |
| County | Frontier |
| Nearest City | Indianola |
| River/Stream | Tr-coon Creek |
| Coordinates | 40.37875, -100.51532 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 525 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 158 acre-ft |
| Max Storage | 158 acre-ft |
| Normal Storage | 64 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Frontier County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/28/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE04107 |
| Federal ID | NE04107 |
| More Info | State Dam Safety Program |