Construction on Hunter Mill Bridge over Colvin Run expected to begin this summer

A rendering of the planned Hunter Mill Road bridge over Colvin Run with an inset photo of the existing bridge (via VDOT)

Residents in the Lake Fairfax area may soon notice signs popping up along Hunter Mill Road, as construction crews prepare to replace the bridge over Colvin Run.

A precise date for when construction will kick off has not been determined yet, but the Virginia Department of Transportation confirmed to Reston Now that work on the project is scheduled to start later this summer, slightly behind previous expectations.

Signs are being installed now for “erosion control activities” that will begin later this month, VDOT spokesperson Kathleen Leonard says, adding that the project webpage will be the best place to check for future updates as construction progresses.

Approved by the Fairfax County Board of Supervisors in December, the Hunter Mill Road over Colvin Run bridge replacement project will introduce a new bridge with two lanes separated by a three-foot-wide grass median.

Built in 1974, the existing bridge has just one lane and can only accommodate a maximum of 10 tons at a time. An average of 8,500 vehicles utilize the bridge per day, according to VDOT.

Other changes will include improvements to the trail crossing south of the bridge and the addition of abutments designed to accommodate a future trail bridge over Colvin Run, though that bridge will be constructed by Fairfax County at a later date.

VDOT awarded a construction contract for the project to Clearwater Construction, Inc. in April.

Based in Mercer, Pennsylvania, Clearwater is also involved in the Transform 66 Outside the Beltway project. According to the company’s website, it has specifically been tasked with constructing two bridges and supporting excavation needs as part of the project, which will add express lanes on I-66 from I-495 in Dunn Loring to Gainesville.

The Colvin Run bridge replacement project has an estimated cost of $5.8 million, including $4.8 million for construction.

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