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

Please note: This project was completed in August 2023.

Hunter Mill Rd drivers don't need to yield to oncoming traffic at Colvin Run in #Vienna anymore - the two-lane bridge fully opened today! The now complete project also includes a raised median and an improved trail crossing south of the bridge.

Read more: https://t.co/N92AqLAo8P pic.twitter.com/yMjBU8R87H

— VDOT Northern VA (@VaDOTNOVA) August 9, 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.

Benefits 

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