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| Keywords: IllinoisTunnelTrunkTunnelConstruction.jpg en Original captions Western Fig 8 View of Trunk Conduit Under Construction and inscribed on bottom of photo 9182 Illinois Telephone and Telegraph Co illegible Trunk System - Franklin Washington Sts Pages Fig 5 VIEW OF TRUNK CONDUIT UNDER CONSTRUCTION This image is a composite of both published versions in order to reduce artifacts from scanning and printing Trunk tunnels were 14 feet high by 12 3/4 feet wide The photo does not show the actual street intersection suggested in the title but the system map in Western Fig 17 suggests that this section of trunk tunnel is near the base of Construction Shaft No 3 on Franklin Since the shaft entrance is not in view the camera must be facing north toward the street intersection George W Jackson Scope Extent and Construction of the Underground Conduits of the Illinois Telephone and Telegraph Co in Chicago http //books google com/books id DJ4PAQAAIAAJ pg PA487 Journal of the Western Society of Engineers Vol VII No 5 Oct 1902 ; page 487 Also published in George W Jackson Underground Conduits in Chicago http //books google com/books id jz4AAAAAMAAJ pg PA323 Page's Magazine Vol II No 4 April 1903 ; page 323 George W Jackson died 1922 First published 1902-10 41 52 57 94 N 87 38 7 14 W region US-IL_heading N Chicago Tunnel Company Chicago in the 1900s Tunnel construction PD-old | ||||
