Johnston Dam
Johnston Dam is an earth dam located in Webster County, Nebraska, built in 1957. It carries a Low hazard potential classification and has a poor condition assessment.
About Johnston Dam
The primary purpose of Johnston Dam is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Donald R Duffy (private). It impounds the Tr-ash Creek near Guide Rock.
The dam stands 14 feet tall and stretches 860 feet across, creates a reservoir covering 29 acres, has a maximum storage capacity of 179 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1957, 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 06/22/2021.
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Location
| State | Nebraska |
| County | Webster |
| Nearest City | Guide Rock |
| River/Stream | Tr-ash Creek |
| Coordinates | 40.02781, -98.32003 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 860 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 179 acre-ft |
| Max Storage | 179 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 29 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 870 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Donald R Duffy |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/22/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE00680 |
| Federal ID | NE00680 |
| More Info | State Dam Safety Program |