id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
19037	Mason, Francis	Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The Cross-Town Tunnels. Paper No. 1158			.txt	text/plain	12302	853	82	Typical cross-sections of the tunnels are shown on Plate XII.[B] Workings were started both east and west from the Intermediate Shafts, plant in the shafts by the subsequent work in the Cross-Town Tunnels was excavation of the Twin Tunnel in 33d Street was continued westward to Fig. 3, Plate LIX, shows the first section of the concrete lining completed placed, as shown by Fig. 1, Plate LX, the center wall and skewback were STARTED FOR THREE-TRACK TUNNEL IN 33D STREET NEAR 5TH AVENUE] the tunnel, but the lining was placed as soon as the excavation was West of the Intermediate Shaft the tunnel was excavated for full width excavation of the Twin Tunnel eastward from the end of the open-cut shaft, a drift was driven across the street at the crown of the tunnel, heading, and wall-plates and sets of three-segment arch timbering were rock on the center line between the tunnels.	./cache/19037.txt	./txt/19037.txt