Amtrak reopened Line 2 of the East River Tunnel on September 1, marking another finished leg in the railroad's decade-long push to undo Hurricane Sandy's saltwater damage under the East River.

The East River Tunnel is four separate tubes carrying Amtrak, NJ Transit, and LIRR trains between Manhattan and Long Island City. All four flooded with saltwater during Sandy in 2012, and every one has needed its bench walls, cabling, track bed, and lighting torn out and rebuilt — tube by tube, on nights and weekends, so the railroad never has to shut down completely. Line 2 is the one that's done now, according to Amtrak's own recap posted to its media site.

For contractors chasing Northeast Corridor tunnel work, this is confirmation the program is still moving and still cutting checks. Amtrak hasn't said which tube is next or when that scope goes out to bid, but the pattern of the last several years — one tube finished, another queued right behind it — means the tunnel-rehab pipeline through Manhattan and Queens isn't closing anytime soon.

If tunnel electrical, bench-wall concrete, or systems work is your trade, the move to make now is simple: get on Amtrak's supplier list and watch its procurement notices for the next tube's rehab package. Nothing's posted yet, but on this program, it never stays quiet for long.