Lake Anna Dam And Reservoir - Dike Vi Reservoir Report
Last Updated: December 8, 2025
Lake Anna Dam and Reservoir - Dike VI, located in Louisa, Virginia, is a vital water supply infrastructure managed by a public utility.
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Summary
Built in 1972 by Stone & Webster Engineering Corp., this earth dam stands at 40 feet high with a hydraulic height of 42 feet, serving the primary purpose of water supply. The reservoir has a storage capacity of 487,000 acre-feet and covers a surface area of 13,000 acres, providing essential water resources for the region.
Managed by the Federal Energy Regulatory Commission, the dam has a low hazard potential and a high risk assessment rating of 2. Despite not being regulated or inspected by the state, it meets federal guidelines for emergency action preparedness. The dam is associated with five other structures and is situated on the North Anna River, ensuring a steady water supply for the surrounding communities. With its strategic location and design, Lake Anna Dam and Reservoir - Dike VI plays a crucial role in water resource management and climate resilience in the region.
The dam's significance is further highlighted by its federal oversight and maintenance standards, ensuring operational safety and risk management. While it may not be regulated by the state, the dam's low hazard potential and high-risk assessment underscore the importance of its efficient operation. With its impressive storage capacity and strategic location, Lake Anna Dam and Reservoir - Dike VI stands as a key asset in securing water resources and mitigating climate-related challenges in the area.
Year Completed |
1972 |
Dam Length |
850 |
Dam Height |
40 |
River Or Stream |
North Anna |
Primary Dam Type |
Earth |
Surface Area |
13000 |
Hydraulic Height |
42 |
Nid Storage |
487000 |
Structural Height |
40 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
42 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Lake Anna Dam And Reservoir - Dike Vi