Manhattan’s Second Avenue Subway continues construction on the island’s east side. A new construction update from the Metropolitan Transportation Authority details excavation work at what will one day be the line’s 86th Street station and the various pieces of heavy machinery that are used in the construction process. Take a look at the photos below and be sure to check out more spectacular tunneling photos from the Seven Line subway expansion and the East Side Access Tunnel for the Long Island Railroad.

Click on a thumbnail to launch the slideshow. All images courtesy the MTA / Patrick Cashin.