The most valuable thing Amtrak can do to a century-old movable bridge is stop it from moving.
The railroad awarded contracts in late July to rehabilitate Dock Bridge, the 1935 lift structure carrying the Northeast Corridor over the Passaic River between Newark and Harrison, with major work starting before the end of 2026. Skanska took the $87 million design-bid-build rehabilitation contract, which it booked in the third quarter. LiRo-Hill of Syosset, New York won project management. Total project cost is roughly $242 million, about $140 million under the original budget.
Converting a lift bridge to a fixed span
Dock Bridge is a six-track, triple-span movable lift bridge. Under a U.S. Coast Guard permit granted in 2024, it becomes a fixed crossing. That removes the lift machinery, the counterweights, the control systems, and every failure mode attached to them.
It’s a bigger deal than it sounds. Movable bridges fail closed or fail open, and on the busiest passenger rail line in North America either one cascades. Dock Bridge alone carries more than 700 trains and 200,000 Amtrak, NJ TRANSIT and PATH riders a day. A seating problem there is a three-state delay by lunchtime.
A pattern, not a one-off
Portal North on the Hackensack, the Connecticut River crossings, Sawtooth in Kearny: the corridor is dotted with mechanisms built when river freight still mattered and maintained ever since for traffic that mostly stopped coming. Every one of them is a single point of failure protected by a navigational easement that in many cases no longer serves a working waterway.
Getting the Coast Guard to release that easement is the unglamorous half of the work, and it’s why these projects take a decade of permitting before anyone mobilizes. Once the permit lands, the engineering is comparatively ordinary.
The budget number worth noting
Coming in $140 million under the original estimate is rare enough on Northeast Corridor work to deserve mention. Funding is led by a $188 million Federal Railroad Administration grant, with NJ TRANSIT, the Port Authority of New York and New Jersey, and Amtrak splitting the remainder.
The hard part is sequencing. Six tracks, no meaningful shutdown window, and a live corridor underneath. Details are in the Dock Bridge project listing, and for the aviation equivalent of the same phasing problem, see the Dulles transformation.