The century-old tunnels beneath the East River were once a star of a world fair.

Countries & Cities · Published 15 October 2026 Swipe more like this →

In short: Before they became a vital artery for New York City rail, the East River Tunnels were so technologically advanced that a massive section of one tube was put on public display. Today, these four underwater passages remain essential, despite the lingering damage caused by a historic hurricane over a decade ago.

The East River Tunnels were conceived as part of the New York Tunnel Extension, a massive infrastructure project launched in the early 20th century to connect Long Island and New Jersey via Manhattan. Originally, planners considered a bridge across the Hudson River, but the high costs led to the construction of tunnels instead. By 1903, the contract for the four-tube East River project was awarded to S. Pearson & Son, with Chief Engineer Alfred Noble leading the effort. Construction began in 1904, utilizing innovative techniques that were so impressive the Pennsylvania Railroad showcased a 23-foot diameter section of the tunnel at the 1907 Jamestown Exposition.

The tunnels officially opened in 1910, serving as the gateway to the original Pennsylvania Station. Over the decades, they became a critical component of the Northeast Corridor, carrying Amtrak, Long Island Rail Road, and New Jersey Transit trains. Because of ventilation constraints, diesel locomotives are generally prohibited, requiring the use of dual-mode engines for non-electrified routes. Furthermore, the tunnels' specific clearance limitations mean that Amtrak's Superliner fleet cannot pass through them, necessitating the use of Amfleet and Viewliner sets instead.

The system faced a major crisis in 2012 when Hurricane Sandy flooded the tubes with 14 million gallons of water. The resulting saltwater intrusion caused persistent corrosion and signal failures that plagued operations for years. After significant delays, a major $1.6 billion repair project began in 2025. This work involves complex, multi-year closures of individual tubes to address the structural decay. As of August 2026, the first phase of repairs on line 2 was completed, marking a significant step in preserving this vital link between Manhattan and Queens.

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