Lake Newport Dam Reservoir Report

Last Updated: December 22, 2025

Lake Newport Dam in Fairfax, Virginia, is a privately owned dam regulated by the Department of Conservation and Recreation.


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Summary

This earth dam, standing at a height of 32 feet, serves multiple purposes including flood risk reduction and recreation, with a primary focus on providing recreational opportunities for the community. The dam has a storage capacity of 240 acre-feet and covers a surface area of 12 acres, offering a serene setting for outdoor activities.

Despite its satisfactory condition assessment as of February 2021, Lake Newport Dam has been classified with a high hazard potential, emphasizing the need for regular inspections and maintenance to ensure public safety. The dam is situated on the TR-Colvin Run river and is under state jurisdiction for permitting, inspection, and enforcement. With a history of compliance with regulatory requirements, this dam continues to be a vital infrastructure for water resource management and climate resilience in the region.

As climate enthusiasts and water resource advocates, understanding the significance of Lake Newport Dam's role in flood risk reduction and recreational opportunities is crucial. With its strategic location in Fairfax County, Virginia, this dam not only provides essential storage capacity but also contributes to the overall ecological health and community well-being. By staying informed about its condition, emergency preparedness measures, and regulatory oversight, we can ensure the sustainable management of this critical water resource for future generations.

Dam Length

900

Dam Height

32

River Or Stream

TR-Colvin Run

Primary Dam Type

Earth

Surface Area

12

Hydraulic Height

32

Drainage Area

0.21

Nid Storage

240

Structural Height

32

Hazard Potential

High

Nid Height

32
       
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.