Illustrates and describes the methods and plant used in driving the tunnels under 32d and 33d streets from the shafts at First avenue to the terminal station at Seventh avenue. The doubletrack tunnel is being driven through rock without disturbing the surface. (2200 w.) (No. 80203)
The Pennsvlvania tunnels across Manhattan Island
R R Gaz
1906
Aufsatz (Zeitschrift)
Englisch
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