South Anna Dam #7
South Anna Dam #7 is an earth dam located in Louisa County, Virginia. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About South Anna Dam #7
The primary purpose of South Anna Dam #7 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 Thomas Jefferson Soil And Water Conservation District (local government). It impounds the Central Branch.
The dam stands 34 feet tall and stretches 410 feet across, creates a reservoir covering 35 acres, has a maximum storage capacity of 715 acre-feet, and collects water from a drainage area of 3 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 04/28/2020.
At 34 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Virginia |
| County | Louisa |
| River/Stream | Central Branch |
| Coordinates | 37.99750, -78.17630 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 410 ft |
Storage & Hydraulics
| NID Storage | 715 acre-ft |
| Max Storage | 715 acre-ft |
| Normal Storage | 209 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 3 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Thomas Jefferson Soil and Water Conservation District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/28/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | VA109005 |
| Federal ID | VA109005 |
| More Info | State Dam Safety Program |