<p>A "sandhog" crawls through the tunnel boring machine that just cut through the bedrock underneath the Port Authority bus terminal.</p>
<p>A "sandhog" crawls through the tunnel boring machine that just cut through the bedrock underneath the Port Authority bus terminal.</p>
Gothamist
Slide 2 of 3
<p>Sandhog Tommy Gramza, left, a tunnel boring machine mechanic sits on the machine's gripper shield after another tunnel boring machine cut through the bedrock.</p>
<p>Sandhog Tommy Gramza, left, a tunnel boring machine mechanic sits on the machine's gripper shield after another tunnel boring machine cut through the bedrock.</p>