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Summary
View of the back of the hydraulic tunnel shield installed during construction in the south tube of the North River Tunnels under the Hudson River. The North River Tunnel project was part of the larger New York Tunnel Extension project of the Pennsylvania Railroad.
Tags
north river tunnels
pennsylvania railroad construction
tunnel construction in the united states
tunnelling equipment
Date
03/10/1905
Source
Wikimedia Commons
Link
Copyright info
public domain