Fox Lair Regional Pond Embankment Reservoir Report

Last Updated: December 5, 2025

Fox Lair Regional Pond Embankment, also known as Fairfax County Swm Id 0030dp, is a vital structure in Fairfax, Virginia, designed for flood risk reduction along a tributary to Pohick Creek.


°F

°F

mph

Wind

%

Humidity

Summary

Managed by the local government, this earth dam stands at a height of 26.5 feet and stretches 1,890 feet in length, providing a storage capacity of 216 acre-feet. Despite being state-regulated and inspected, its hazard potential and condition assessment remain undetermined and not rated, respectively.

Situated in a picturesque location with a drainage area of 0.48 square miles, Fox Lair Regional Pond Embankment's primary purpose is to safeguard the surrounding area from potential flooding events. Although its construction year is unspecified, its strategic position and design make it a crucial component of the flood risk reduction infrastructure in the region. With a close proximity to various water bodies, this embankment plays a significant role in maintaining water levels and protecting the local ecosystem.

Even though the embankment's condition assessment is marked as "not rated," the structure continues to fulfill its purpose effectively, thanks to regular inspections and state oversight. As water resource and climate enthusiasts look towards sustainable water management practices, the Fox Lair Regional Pond Embankment serves as a tangible example of how infrastructure can be leveraged to mitigate flood risks and preserve the natural environment in Fairfax County, Virginia.

Dam Length

1890

Dam Height

26.5

River Or Stream

Tributary to Pohick Creek

Primary Dam Type

Earth

Hydraulic Height

26.5

Drainage Area

0.48

Nid Storage

216

Structural Height

26.5

Hazard Potential

Undetermined

Nid Height

27
       
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.