[Tunnel construction.]
[Holland Tunnel.]
Midtown Tunnel under Hudson River, April 24, 1935
[McAdoo Tunnel.]
[Constructing the McAdoo Tunnel.]
[Unloading ring from truck.]
Building the McAdoo Tunnel, Under the Hudson River, New York.
Southbound express tunnel.
[Construction of the Pennsylvania Railroad tunnels under the Hudson.]
Original Exhibits of Rapid Transit Subway Construction Company, Plaintiff [Excavating a tunnel; subway construction.]
Queensboro Tunnel.
Drilling and Mucking Bench [of] Lower Half of Tunnel [Catskill System.]
Rondout Pressure Tunnel Showing Partial and Total Concrete Lining [Catskill System.]
[Subway tunnel.]