Mule Pen Quarry Structure No. 1 (1 Of 3 Structures) Reservoir Report

Last Updated: December 5, 2025

Mule Pen Quarry Structure No.


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Summary

1, also known as Industrial Drive Dam No.1, is a private water structure located in Fairfax, Virginia, along the Backlick Run tributary. This dam is part of a series of three structures and is regulated by the Department of Conservation and Recreation in Virginia. With a height of 6.2 feet and a storage capacity of 53.3 acre-feet, this dam serves purposes beyond just water storage, making it a unique and essential component of the local water resource infrastructure.

Despite its importance, the condition assessment of Mule Pen Quarry Structure No. 1 is currently listed as "Not Rated," indicating a need for further evaluation and monitoring. The hazard potential of this dam is classified as "Undetermined," highlighting the need for ongoing inspection and maintenance to ensure the safety and integrity of the structure. While the specific year of completion is not provided, the dam's functionality and regulatory oversight make it a significant feature in the management of water resources in the area.

As a key point of interest for water resource and climate enthusiasts, Mule Pen Quarry Structure No. 1 represents a crucial component of the water infrastructure in Fairfax, Virginia. With its unique design and regulatory oversight, this dam plays a vital role in managing water flow and storage along the Backlick Run tributary. Continued monitoring and assessment of this structure are essential to ensure its long-term functionality and safety in the face of changing climate conditions and water resource demands.

Dam Length

700

Dam Height

6.2

River Or Stream

Backlick Run tributary

Primary Dam Type

Other

Surface Area

13.7

Hydraulic Height

6.2

Nid Storage

53.3

Structural Height

6.2

Hazard Potential

Undetermined

Nid Height

6
       
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.