Twin Lakes Dam Reservoir Report
Nearby: Clowser Dam Mhc Regency Lakes Dam
Last Updated: December 5, 2025
Twin Lakes Dam, located in Frederick County, Virginia, is a private-owned earth dam with a height of 35 feet and a length of 350 feet.
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Summary
The dam serves primarily for recreational purposes, providing a storage capacity of 285 acre-feet and a normal storage of 142 acre-feet. Situated on TR-Opequon Creek, the dam has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment.
Managed by the Department of Conservation and Recreation, Twin Lakes Dam is state-regulated and subject to regular inspections, enforcement, and permitting. Despite its low hazard potential, the dam has not undergone any modifications or risk assessments in recent years. With a surface area of 10 acres and a drainage area of 1.2 square miles, the dam remains an important water resource in the region, contributing to the overall water management system in the area. Water resource and climate enthusiasts may find Twin Lakes Dam an intriguing case study in dam management and recreation-based infrastructure in Virginia.
Dam Length |
350 |
Dam Height |
35 |
River Or Stream |
TR-Opequon Creek |
Primary Dam Type |
Earth |
Surface Area |
10 |
Hydraulic Height |
35 |
Drainage Area |
1.2 |
Nid Storage |
285 |
Structural Height |
35 |
Hazard Potential |
Low |
Nid Height |
35 |
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.
Twin Lakes Dam