Prentice Drive Dam (Near Randolph Drive) Reservoir Report

Last Updated: December 5, 2025

The Prentice Drive Dam, located near Randolph Drive in Loudoun, Virginia, is a privately owned structure designed for flood risk reduction along the Broad Run tributary.


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Summary

Standing at a height of 18 feet and stretching 450 feet in length, this earth dam provides a storage capacity of 56.6 acre-feet, with a normal storage level of 16.1 acre-feet and a surface area of 4.6 acres. Despite being state regulated and inspected, the dam's hazard potential and condition assessment remain undetermined and not rated, respectively.

Owned privately, the Prentice Drive Dam serves as a crucial infrastructure for flood risk management in the area, under the oversight of the Department of Conservation and Recreation in Virginia. With its strategic location and purpose, this dam plays a significant role in safeguarding the surrounding community from potential flood events. Although its emergency action plan and risk assessment details are currently unspecified, the dam's operational readiness and functionality are essential for effective emergency response and risk mitigation.

While the exact completion year and modification history of the Prentice Drive Dam are unspecified, its structural integrity and efficiency in flood risk reduction are paramount. As water resource and climate enthusiasts, understanding the significance of this dam in protecting the local ecosystem and residents from potential flooding events highlights the importance of maintaining and assessing its condition regularly. As the dam's hazard potential and emergency preparedness remain undetermined, continued monitoring and evaluation are crucial to ensure its effectiveness in mitigating flood risks and protecting the community.

Dam Length

450

Dam Height

18

River Or Stream

Broad Run tributary

Primary Dam Type

Earth

Surface Area

4.6

Hydraulic Height

18

Nid Storage

56.6

Structural Height

18

Hazard Potential

Undetermined

Nid Height

18
       
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.