Harper’s Ferry

Category
Bridge Construction & Repair

Client
West Virginia Department of Transportation

Location
US 340 over the Shenandoah River and CSX in Harpers Ferry National Historic Park

Key Challenges & Project Details

• Construction of two-lane, eight-span (elevated 60’), 432-meter (1440’) long bridge
• Heavily traveled US 340 corridor serving commercial, commuter, and recreational traffic, as well as Appalachian Trail hikers
• Environmental management a paramount concern
• Environmental response plan in place for the project’s duration
• Project completed with no environmental accidents – recreational activities safely maintained throughout project
• Superstructure included two super-elevated curves
• Substructure included seven piers founded on 3.7 meter diameter caissons drilled to nine meters in competent rock
• Abutments encompassed 960 square meters of architecturally-finished reinforced earth retaining walls
• 7 pier superstructure consisted of 3,000 cubic meters of concrete
• 23,500 cubic meter rock embankment construction, as well as rock causeway to gain access to three river pier locations
• Biodegradable operating fluids used in lieu of hydraulic fluid for all equipment traveling on the causeway or near the river edge
• Upon completion and opening of the new structure, existing bridge demolition accomplished using controlled explosives