Hunter Mill Road over Difficult Run
|Constructing a permanent bridge in Fairfax County|
Project at a Glance
Brian Morrison, P.E.
Structure & Bridge
About the Project
The purpose of this project is to replace the temporary Hunter Mill Road (Route 674) bridge over Difficult Run. A temporary bridge was installed in November 2011 to replace the original structurally deficient bridge while VDOT developed plans for a permanent structure.
The bridge width will be widened to accommodate an 11-foot wide lane in each direction and four-foot wide shoulders to address recommendations by the 2006 Hunter Mill Road Traffic Calming Study. Accelerated construction will take place along with reusing the temporary bridge foundations to minimize the construction duration. The bridge length will be approximately 50 feet. Hunter Mill Road at Difficult Run will be closed for approximately 20 days during construction and traffic will be detoured as it was during installation of the temporary bridge.
The existing bridge has an average traffic count of 17,000 vehicles per day, and a projected count of 22,000 vehicles per day for the design year of 2035.
Schedule & Costs
Advertisement - January 2018
Construction – Summer 2018
Preliminary engineering: $390,000
Right-of-way and utilities: $435,000
Construction: $1.4 million
Total: $2.2 million