Lake Anna Dam And Reservoir - Dike Iii Reservoir Report
Last Updated: December 8, 2025
Lake Anna Dam and Reservoir - Dike III, located in Louisa, Virginia, is a vital structure designed by Stone & Webster Engineering Corp.
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Summary
in 1972 for water supply purposes. This earth dam stands at a height of 23 feet and has a maximum storage capacity of 487,000 acre-feet, serving the community with a normal storage capacity of 305,000 acre-feet. The reservoir spans over 13,000 acres and is fed by the North Anna River, providing essential water resources to the region.
Managed by the Federal Energy Regulatory Commission, Lake Anna Dam and Reservoir - Dike III boasts a low hazard potential and undergoes inspections every three years to ensure its structural integrity. Despite being non-state regulated, the dam and reservoir play a crucial role in water supply management for the area. With Abigail Davis Spanberger (D) representing the region in Congress, the dam serves as a key infrastructure for maintaining water resources and mitigating climate-related risks in the area.
With a risk assessment rating of high (2), Lake Anna Dam and Reservoir - Dike III remains a significant asset in water resource management, albeit with certain risks associated. The dam's association with other structures underscores its importance in the region's water infrastructure network, ensuring reliable water supply and risk management measures are in place. As a focal point for water resource and climate enthusiasts, this dam exemplifies the intersection of engineering excellence and environmental stewardship in safeguarding water resources for future generations.
Year Completed |
1972 |
Dam Length |
3150 |
Dam Height |
23 |
River Or Stream |
North Anna |
Primary Dam Type |
Earth |
Surface Area |
13000 |
Hydraulic Height |
23 |
Nid Storage |
487000 |
Structural Height |
23 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
23 |
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 Iii