Mountain Run Dam #8a is an earth dam located in Culpeper County, Virginia. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 34 ft34 ft tall and 545 ft long, taller than 78% 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 Mountain Run Dam #8a
The primary purpose of Mountain Run Dam #8a 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 Culpeper Soil and Water Conservation District (local government). It impounds the Mountain Run.
The dam stands 34 feet tall and stretches 545 feet across, creates a reservoir covering 21 acres, has a maximum storage capacity of 1,870 acre-feet, and collects water from a drainage area of 5 square miles.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. 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 04/14/2022.
At 34 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Virginia |
| County | Culpeper |
| River/Stream | Mountain Run |
| Coordinates | 38.49820, -78.07880 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 545 ft |
Storage & Hydraulics
| NID Storage | 1,870 acre-ft |
| Max Storage | 1,870 acre-ft |
| Normal Storage | 73 acre-ft |
| Surface Area | 21 acres |
| Drainage Area | 5 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Culpeper Soil and Water Conservation District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/14/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | VA047001 |
| Federal ID | VA047001 |
| More Info | State Dam Safety Program |