Gore Dam Reservoir Report

Last Updated: December 5, 2025

Located in Loudoun, Virginia, Gore Dam is a privately owned structure with a primary purpose of recreation.


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Summary

Designed by Echols Engineering, PLC, this earth dam stands at a height of 40 feet and has a length of 400 feet, creating a storage capacity of 162 acre-feet. Situated on the TR-Potomac River, this dam has a drainage area of 0.27 square miles and a surface area of 8 acres, offering a picturesque setting for water resource and climate enthusiasts.

With a high hazard potential but a satisfactory condition assessment as of December 2020, Gore Dam is regulated by the Department of Conservation and Recreation in Virginia. The dam's last inspection was conducted in December 2020, with an inspection frequency of once per year. Despite its high hazard potential, the dam meets safety guidelines and has an emergency action plan in place.

Recreationally valuable and environmentally significant, Gore Dam serves as both a leisure destination and an essential infrastructure for managing water resources in the region. Its tranquil surroundings and structural integrity make it a captivating site for visitors interested in both the engineering aspects and natural beauty of water resource management.

Dam Length

400

Dam Height

40

River Or Stream

TR-Potomac River

Primary Dam Type

Earth

Surface Area

8

Hydraulic Height

40

Drainage Area

0.27

Nid Storage

162

Structural Height

40

Hazard Potential

High

Nid Height

40
       
Seasonal Comparison

Weather Forecast

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.