Lowry Dam Reservoir Report

Last Updated: December 5, 2025

Lowry Dam, located in Loudoun, Virginia, is a privately owned structure regulated by the State Department of Conservation and Recreation.


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Summary

The dam serves the primary purpose of water supply, with additional recreational benefits. Standing at a height of 33 feet, the earth dam stretches 400 feet in length and has a storage capacity of 109.8 acre-feet. Despite its undetermined hazard potential and unassessed condition, the dam remains operational and under regular inspection by state authorities.

Situated on an unnamed tributary to Dutchmans Creek, Lowry Dam plays a crucial role in providing water resources to the surrounding area. It is managed by a private entity and falls under the jurisdiction of the state of Virginia for permitting, inspection, and enforcement. While the dam's risk assessment and emergency preparedness measures are yet to be fully evaluated, its operational status and regulated state oversight ensure the safety and functionality of this vital water supply infrastructure.

Water resource and climate enthusiasts will find Lowry Dam an intriguing subject, given its significance in water supply and recreational use. The dam's location in Loudoun County, Virginia, and its association with the Baltimore District of the US Army Corps of Engineers add to its appeal for those interested in the intersection of water management, infrastructure, and environmental stewardship. With its impressive size, storage capacity, and potential impact on the surrounding ecosystem, Lowry Dam presents a compelling case study for understanding the complexities of water resource management in a changing climate.

Dam Length

400

Dam Height

33

River Or Stream

Un-named TR to Dutchmans Creek

Primary Dam Type

Earth

Surface Area

7.1

Hydraulic Height

33

Nid Storage

109.8

Structural Height

33

Hazard Potential

Undetermined

Nid Height

33
       
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.