CBS News recently went inside the Hugh L. Carey Brooklyn-Battery Tunnel, which was flooded by 60 million gallons of water during Hurricane Sandy, to observe how the MTA, National Guard, and Army Corps of Engineers are working on removing water and getting the tunnel operational. The crew uses motorized tubes that are capable of removing 2,000 gallons of water per minute.

So far, workers have cleared the tunnels west tube of water–though there’s still mud and debris–and are working on getting the east side dry. Though clear progress is being made, site facility engineer Romalo de Santis is reluctant to predict when the tunnel, which typically carries 45,000 vehicles a day, will be open.