Amtrak officials marked six months of construction on the East River Tunnel it shares with the Long Island Rail Road Wednesday by showing off the structure's rehabilitation, more than a decade after it was damaged during Superstorm Sandy.

The work comes after Amtrak and the LIRR argued about when to close the tunnel , forcing some rush hour trains to be diverted from Penn Station to Grand Central Madison.

LIRR president Rob Free and Metropolitan Transportation Authority officials toured the tunnel with Newsday, noting afterward that the two agencies are working together after overcoming differences on the timing of the work.

"It's on schedule. We want to get the track back so we can continue to provide excellent, reliable service. If Amtrak wins, we all win. It serves the greater good

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