H&H provided multi-disciplinary bridge inspection services to Amtrak for a special detailed inspection of the three vertical lift spans that make up the Dock Bridge. The work plan provided a two-week window to complete the inspections while maintaining uninterrupted access for the more than 500 trains daily that cross the bridge, one of the busiest and most critical stretches of rail anywhere in the world. Work included structural, mechanical, electrical, and underwater inspection. The plan included utilizing trunnion and magnetic particle testing.
The trio of spans that make up the Dock Bridge facility includes the original bridge designed by H&H founder JAL Waddell in 1935. Owned by Amtrak, three major railroads use the bridge, Amtrak, PATH, and NJ TRANSIT.