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  • 21 Aug, 2019

  • By, Wikipedia

File:North Rvr Tunnel - N Tube Shield 1905.jpg
B.H.M. Hewett, W.L. Brown (1910).

"The New York Tunnel Extension of the Pennsylvania Railroad. The North River Tunnels." Paper No. 1155. Transactions of the American Society of Civil Engineers. Vol. LXVIII, September 1910. p. 236, plate xxxviii. Author Photographer not identified.

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current02:09, 27 June 2013Thumbnail for version as of 02:09, 27 June 2013976 × 1,212 (577 KB)Caseyjonz== {{int:filedesc}} == {{Information |Description={{en|Rear view of the hydraulic tunnel shield installed during construction in the north tube of the {{w|North River Tunnels}} under the Hudson River. The construction crew is installing the first iron ...

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