Recently Completed: Hunter Mill Road over Colvin Run Bridge Replacement in Fairfax County

Cost and schedule ►

Public outreach ►

Please note: This project was completed in August 2023.

This project replaced the previous weight-restricted, one-lane Hunter Mill Road (Route 674) bridge over Colvin Run that was built in 1974. The new bridge has two lanes separated by a median/splitter island. The bridge is located between the Dulles Toll Road (Route 267) and Baron Cameron Avenue (Route 606).

The project also included:

  • An improved trail crossing south of the bridge
  • Landscaping in the median/splitter island 
  • Abutments for a new trail bridge over Colvin Run (Fairfax County will construct the trail bridge in the future)

The bridge averages 7,400 vehicles a day.

Estimated Costs
Preliminary Engineering - $1 million
Construction - $4.2 million
Total: $5.2 million

This project was financed with federal, state (including State of Good Repair funds used for bridges) and Fairfax County funding.


The project aimed to improve safety and traffic flow.

Major Milestones 

Public Information Meeting - April 2018
Virtual Public Involvement - May-June 2020
Virtual Design Public Hearing - September 2020
Advertise for Construction - February 2021
Award Construction Contract - April 2021
Begin Construction - August 2021
Final Completion - August 2023


Contact Info:

Oscar Jamilla, DPE, PMP

Chan Basnayake, P.E., PMP, CCM

Project Photos

Other relevant links:

Construction Completion News Release - August 2023

Construction Start News Release - August 2021

Virtual Design Public Hearing 
VideoPresentationComment SheetAd and Webpage - September 2020

Project Plans - June 2020

Conceptual Bridge Replacement Study Report - October 2017

Previous Meetings >>

Major funding source: State of Good Repair

Phase: Recently Completed

UPC: 110499, 110433

State ID: 0674-029-358, B643, P101, R201

Federal ID: BR-5B01 (164)

Lat/Long: 38.965604, -77.309634

Locality: Fairfax

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View of the bridge, looking north on Hunter Mill Road - July 2022
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June 2022
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Pre-construction view of the bridge, looking south on Hunter Mill Road
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Pre-construction profile view of the bridge
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Profile rendering of the new bridge

Page last modified: Aug. 9, 2023