Una Johnson Dam is a dam located in Cherokee County, South Carolina, built in 1952. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 42 ft42 ft tall, taller than 88% of U.S. dams with a recorded height. 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 Una Johnson Dam
The primary purpose of Una Johnson Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Elmwood Farm LP (private). It impounds the Tr-broad River.
The dam stands 42 feet tall, creates a reservoir covering 23 acres, and has a maximum storage capacity of 394 acre-feet. Completed in 1952, 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 09/05/2017.
At 42 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | South Carolina |
| County | Cherokee |
| River/Stream | Tr-broad River |
| Coordinates | 34.89540, -81.48650 |
Physical Characteristics
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 394 acre-ft |
| Max Storage | 394 acre-ft |
| Normal Storage | 165 acre-ft |
| Surface Area | 23 acres |
Ownership & Safety
| Purpose | Recreation |
| Owner | Elmwood Farm LP |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 09/05/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SCD03422 |
| Federal ID | SCD03422 |
| More Info | State Dam Safety Program |