Portal Bridge

Portal Bridge
Industry	Railroad transportation
Founded	November 27, 1910; 115 years ago
Headquarters	Kearny and Secaucus, United States
Products	Rail bridge infrastructure
Owner	Amtrak

The Portal Bridge is a two-track, rotating swing-span railroad bridge crossing the Hackensack River between Kearny and Secaucus, New Jersey. Situated on the Northeast Corridor just west of Secaucus Junction and east of the Sawtooth Bridges, it is owned and managed by Amtrak and extensively utilized by NJ Transit. This bridge holds the distinction of being the busiest rail crossing in the Western Hemisphere, accommodating between 150,000 and 200,000 passengers daily across approximately 450 trains—equivalent to an average of one train every two minutes during daytime hours.

Commissioned in November 1910 by the Pennsylvania Railroad, the bridge was constructed to connect with the new Pennsylvania Station in New York City. Spanning , it includes a swing span that provides maritime clearance of roughly , varying with tidal conditions. By the early 2000s, speed limits on trains crossing the bridge had been reduced to due to its aging infrastructure and original design constraints.

The replacement of the Portal Bridge constitutes the initial phase of the Gateway Project. After earlier federal funding denials, approval for advancement was granted under the Trump administration in February 2020. The replacement effort is projected to cost $1.8 billion, with financial contributions comprising $811 million from New Jersey, $766.5 million from the Federal Transit Administration (FTA), $261.5 million from Amtrak, and $57.1 million from the Federal Highway Administration (FHWA). Final authorization to proceed was received in April 2022, with construction commencing on August 1, 2022. The new bridge, designated as the Portal North Bridge, is expected to open its first track by mid-2026.

Design and construction

The bridge was part of the Pennsylvania Railroad’s New York Tunnel Extension initiative, which also encompassed projects such as the Sawtooth Bridges, North River Tunnels, and Manhattan Transfer station.

Constructed primarily from steel with masonry abutments, the Portal Bridge features a through-truss swing span complemented by six open-deck girder approach spans—three on each side. Some wooden elements are integrated into its structure.

Construction commenced in August 1905, culminating in the start of service on November 27, 1910. Its design was influenced by engineering concepts dating back to the 1840s and intended for a lifespan of 100 years. Overhead catenary systems enabling electric locomotive operation were installed during the 1930s.

Mechanical components were upgraded in 1931. The structure underwent minor repairs throughout the 1970s, followed by extensive structural, mechanical, and electrical renovations between 1982 and 1984 as part of Amtrak’s Northeast Corridor Improvement Project. Timber components were replaced again in 2019.

Rail service

Serving commuter rail traffic at full capacity, daily passenger volumes on the swing bridge increased significantly—from about 40,000 in 2005 to between 150,000 and 200,000 by 2015—across roughly 450 daily trains operated by both Amtrak and New Jersey Transit.

By 2020, Amtrak scheduled approximately 293 weekly trains (around 42 per day) over this segment of the Northeast Corridor between Newark Penn Station and New York Penn Station. Additionally, five NJ Transit lines—the Northeast Corridor Line, North Jersey Coast Line, Morris and Essex Lines, Montclair-Boonton Line, and Raritan Valley Line—collectively ran 388 weekday trains crossing the bridge in both directions.

River navigation

Vessels navigating the Hackensack River may transit through the swing bridge outside of peak commuter periods. To prevent interruptions to rail operations, the bridge remains closed to river traffic on weekdays between 5 am and 10 am, and again from 3 pm to 8 pm. At all other times, it opens upon request with a two-hour advance notice, which can impact train timetables.

When not allowing river traffic, the bridge is supported by six wedge blocks—two positioned at each end and two located near the central bearing that stabilizes the structure during opening and closing maneuvers.

As of 2015, commercial river use was primarily limited to a sludge barge transporting waste from Bergen County Utilities Authority in Little Ferry to the Passaic Valley Sewerage Commission facility in Newark. In late 2014, out of 90 bridge openings, 75 were for this sludge barge. The bridge has been known to cause delays along the Northeast Corridor when mechanical issues occur; however, Amtrak does not keep detailed records of these delays. After 2016, sludge transport shifted mainly to trucks, though barge service was announced to recommence in 2021.

Operational challenges

The Portal Bridge is frequently identified as the Achilles' heel of the Northeast Corridor. Due to its design limitations, it restricts trains to speeds of . Its lowest structural beams are situated just above the Hackensack River at high tide, necessitating frequent openings for maritime traffic and resulting in delays for both rail and river users.

Approximately one out of every seven openings results in the bridge failing to close correctly because the rails often do not lock securely. In extreme cases, maintenance crews must manually hammer the rails into place before trains can proceed. Between 2014 and 2018, delays attributed to the Portal Bridge and North River Tubes totaled an estimated 2,000 hours.

Annual upkeep expenses reach into the millions. Key figures such as U.S. Senator Bob Menendez, Amtrak’s Assistant Vice President of Planning and Development Drew Galloway, Northeast Corridor planners, and New Jersey Transit Executive Director Richard Sarles have all highlighted this bridge as a significant "choke-point" that limits both speed and capacity on the line.

1996 derailment

On November 23, 1996, a derailment occurred when the swing bridge failed to close properly. Although there were no fatalities, 34 individuals required hospitalization. The cause was traced to a rail elevated by 5 inches acting as a ramp for the train wheels. Following this event, speed limits on the bridge were reduced to , creating a bottleneck along the Northeast Corridor. The incident's financial impact was estimated at $3.6 million.

Fires

A fire erupted on May 13, 2005, likely triggered by overheated 13kV overhead electrical wires that scattered metal fragments onto creosote-coated wooden fenders at the base of the bridge. This blaze halted all traffic until the next morning and caused approximately $5 million in damages.

Another fire on August 4, 2014, disrupted rail service for roughly thirty minutes, leading to further operational interruptions.

Replacement

In December 2008, the Federal Railroad Administration authorized a $1.34 billion initiative to replace Portal Bridge with two new two-track bridges—one positioned north and one south of the existing structure. However, following New Jersey Governor Chris Christie’s cancellation of the Access to the Region's Core project in 2010 and subsequent funding difficulties, plans were scaled back to constructing a single two-track bridge north of the current bridge while reserving space for a future southern span.

By 2014, design plans for the new Portal North Bridge were finalized. This fixed-span structure would stand over above average water level and allow trains to operate at speeds of at least . The project forms part of Amtrak’s Gateway Project, a $13.5 billion effort partially succeeding the canceled Access to the Region's Core.

Construction commenced on August 1, 2022. By May 13, 2024, Amtrak and NJ Transit reported that construction was halfway finished, progressing ahead of schedule with potential completion up to a year early and under a $1.5 billion budget cap. The first of three arches was floated into position in November 2024, with final arch installation completed in February 2025.

The original Portal Bridge is slated for demolition in July 2028.

External links

Portal North Bridge – NJ Transit