"When I started this photography series, no photos were allowed in the tunnels by unofficial photographers," Conway wrote via email.
Tools are painted pink to ensure they won't be lost among the debris in the dark areas of the tunnel.
This is one of two caverns which will eventually be part of the East Side Access train station. It will house two levels of train tracks and pedestrian platforms.
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Many underground rivers and springs flow into the tunnels. Thousands of gallons of water are pumped out each day.
Sandhogs is the colloquial name of the local 147 Union which employs workers on nearly all tunneling projects in New York City.
The union workers were very aggressive towards me because there were concerned they would get in trouble.
They were worried about photos showing them working without safety glasses and gloves would be leaked.
It got to the point where I was constantly questioned by the union guys and was actually thrown out during my second visit.
So I returned to the underground tunneling project even though I was no longer working as a technician.
Since I knew all the rules and protocols it wasn't hard to act like I was still working on the project.
Sneaking around tunnels beneath Park Avenue is not taken lightly as you can imagine in post 9/11 New York.
The editor that I was in contact with suddenly stopped replying to my emails — and the story was dead. Therefore, this is the debut of these pictures.