id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
18065	Noble, Alfred	Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The East River Division. Paper No. 1152			.txt	text/plain	5124	171	57	Within a few hundred feet (Plate XIV), the tracks are reduced to two, each passing into a single tube, the two tunnels under each street being formed in one excavation, the distance between center lines of tunnels being 20 ft. 4 in. The effect of these two changes--type of tunnel and grade--was to lower the roof of the tunnels at Fifth Avenue about 15 ft., which made it practicable to avoid open cutting east of Sixth Avenue.	cache/18065.txt	txt/18065.txt
