South Fork No. 4 Dam
South Fork No. 4 Dam is an earth dam located in Hardy County, West Virginia, built in 1965. It carries a High hazard potential classification and has a satisfactory condition assessment.
About South Fork No. 4 Dam
The primary purpose of South Fork No. 4 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 Potomac Valley Conservation District (local government). It impounds the Rodabaugh Run near Moorefield.
The dam stands 116 feet tall and stretches 867 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 2,941 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1965, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 09/30/2024.
At 116 feet, this dam is taller than 98% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The West Virginia dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | West Virginia |
| County | Hardy |
| Nearest City | Moorefield |
| River/Stream | Rodabaugh Run |
| Coordinates | 38.83528, -79.06778 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 116 ft |
| Dam Height | 116 ft |
| Dam Length | 867 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 2,941 acre-ft |
| Max Storage | 2,941 acre-ft |
| Normal Storage | 181 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 45,773 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Potomac Valley Conservation District |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/30/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WV03105 |
| Federal ID | WV03105 |
| More Info | State Dam Safety Program |