Greene Mountain Lake Dam Reservoir Report

Last Updated: December 5, 2025

Greene Mountain Lake Dam, located in Stanardsville, Virginia, is a privately owned structure that serves primarily for recreational purposes.


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Summary

Built in 1969, this earthen dam stands at a height of 37 feet and spans a length of 450 feet, creating a surface area of 61 acres. It holds a normal storage capacity of 508 acre-feet and a maximum storage of 1408 acre-feet, making it a significant water resource in the area.

Managed by the Department of Conservation and Recreation, Greene Mountain Lake Dam is state-regulated, with regular inspections ensuring its safety and compliance with regulations. The dam features an uncontrolled spillway and outlets, with a hazard potential rated as significant. The risk assessment for the dam is moderate, with a risk management plan in place to mitigate any potential hazards. The surrounding area, including the unnamed tributary to Blue Run, benefits from the dam's presence for recreational use and water storage.

Overall, Greene Mountain Lake Dam stands as a vital structure in the water resource management of Greene, Virginia. Its construction and maintenance contribute to both the local community's enjoyment of recreational activities and the conservation of water resources in the region. With a history dating back to the late 1960s, this dam continues to play a crucial role in the sustainable development and protection of the area's water supply and environment.

Year Completed

1969

Dam Length

450

Dam Height

37

River Or Stream

Unnamed tributary to Blue Run - VAHU6 JR10 Swift Run

Primary Dam Type

Earth

Surface Area

61

Drainage Area

7.01

Nid Storage

1408

Outlet Gates

Uncontrolled - 0

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

37
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

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.