Hibbs Bridge Upgrading & Restoration

The Hibbs Bridge was constructed in the early 1800s as part of the historic Snickersville Turnpike and now carries route 734 over Beaverdam Creek, west of Route 50 in Loudoun County. The bridge is a two, 30-foot-span stone masonry arch structure with stone spandrel walls that extend above the asphalt road surface to form parapets with earth fill between the arch stones and asphalt. The total width of the bridge is 25′-6″.

McMullan was retained by Loudoun County to perform a feasibility study, including a load rating analysis using AASHTO guidelines and a method developed in the United Kingdom for stone arch bridges. After performing the feasibility study, McMullan was further retained to provide design drawings, specifications, and estimates for the restoration of the bridge, which included repairs to the spandrel walls and the installation of a concrete slab for improved live load capacity. The plans were approved by VDOT with bids being accepted. The project was completed on time and under budget.

Loudoun County, VA

Loudoun County DOT

McMullan & Associates


  • CMAA National Capital Chapter Project Achievement Award, Honorable Mention