Trappe Hill Farm Dam Reservoir Report

Last Updated: December 5, 2025

Trappe Hill Farm Dam, located in Loudoun, Virginia, is a private dam regulated by the Department of Conservation and Recreation.


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Summary

Standing at a height of 27.5 feet, the dam has a storage capacity of 24.64 acre-feet and covers a surface area of 1.7 acres. While the dam's hazard potential is listed as undetermined and its condition is not rated, it is regularly inspected by state authorities to ensure its safety and compliance with regulations.

The dam, situated within the jurisdiction of the Baltimore District, has not been assigned a specific purpose, type, or foundation. Despite lacking certain details such as the year of completion and dam length, Trappe Hill Farm Dam remains an essential structure for water resource management in the region. With its state-regulated status and the involvement of the Department of Conservation and Recreation in permitting, inspecting, and enforcing regulations, the dam plays a crucial role in protecting the surrounding community from potential hazards and ensuring the effective management of water resources in the area.

Enthusiasts of water resources and climate will find Trappe Hill Farm Dam to be an intriguing subject of study, given its unique characteristics and the regulatory framework that governs its operation. As a private dam with state oversight and a significant storage capacity, the dam serves as a vital component of the local water infrastructure. Continuous monitoring and inspections help to maintain its integrity and safeguard against potential risks, making it a key asset in the management of water resources and the preservation of environmental quality in the region.

Dam Height

27.5

Surface Area

1.7

Hydraulic Height

27.5

Nid Storage

24.64

Structural Height

27.5

Hazard Potential

Undetermined

Nid Height

28
       
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.