Lake Anna Dam and Reservoir Quick Facts
Lake Anna Dam and Reservoir Map
Lake Anna Dam and Reservoir Information
Lake Anna Dam and Reservoir is an earthen embankment dam located about 15 miles from Hewlett, Louisa, Virginia.
The dam, which is on the North Anna River, was primarily built for Hydroelectric purposes, but also serves for Water Supply benefits.
The dam was designed by Stone & Webster Engineering Corp. and commissioned in 1972 and is currently owned by .
Lake Anna Dam and Reservoir Structure
The Lake Anna Dam and Reservoir is approximately 5,150 feet (1,570 m) long, 90 feet (27 m) high and has a structural volume of 900,000 cubic yards (688,100 cubic metres).
Lake Anna Dam and Reservoir Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 305,000 acre-ft (376,211 Ml) and maximum capacity of 487,000 acre-ft (600,705 Ml).
The surface area of the reservoir is 13,000 acres (5,261 ha) and the total catchment area is 343 square miles (888 square kilometres).
Lake Anna Dam and Reservoir Spillway
The dam has a 140 feet (43 m) wide controlled spillway with a maximum discharge capacity of 142000 cubic feet per second (4021 cubic metres per second).
Lake Anna Dam and Reservoir Compared to Five Famous American Dams
Lake Anna Dam and Reservoir Weather
Current Conditions at Lake Anna Dam and Reservoir
Failed to fetch current weather data.7-Day Forecast for Lake Anna Dam and Reservoir
Failed to fetch weather forecast data.Lake Anna Dam and Reservoir Frequently Asked Questions
Lake Anna Dam and Reservoir is in Virginia.
Lake Anna Dam and Reservoir is in Louisa County.
Lake Anna Dam and Reservoir is 90 feet high.
Lake Anna Dam and Reservoir is 5,150 feet long.
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Condition Assessment Classification
Satisfactory
No 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
High
Dams 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.
Source: National Inventory of Dams