The 108 years old, first underwater Joralemon Tube, built in 1908 with a tunnel length of 3.2 track miles, carries 4 and 5 trains under the East River between Bowling Green Station in the borough of Manhattan and the Borough Hall Station in the borough of Brooklyn. The Joralemon Tube carries approximately half million commuters on an average weekday and was one of seven East River subway tunnels flooded on October 29, 2012 as Hurricane Sandy’s storm surge inundated Lower Manhattan. The tubes were heavily damaged as a result of the salt waters that surged in to the system damaging duct banks, pumping equipment, electrical and switching equipment. An exhaustive examination of systems and components determined that the facility was in need of significant permanent repair, upgrade, and fortification against future storms. This vital project is part of an overall multi-year effort to fix and fortify MTA assets damaged during Sandy.
American Analytical is providing sampling and analytical services in support of the rehabilitation efforts.
The New York City Subway is one of the world’s oldest public transit systems, one of the world’s most used metro systems with the most stations and the most trackage. By annual ridership, the New York City Subway is the busiest rapid transit rail system in the United States and in the Western world, with annual 1.75 billion rides, averaging approximately 5.6 million daily rides on weekdays and a combined 5.9 million rides each weekend. The main challenge to execute this project is to perform the work with least inconvenience to commuters and without effecting normal ridership. The rehabilitation work on the Joralemon Tube is currently in progress with the goal of completion in 2017.