Chicago : Engineering and Contracting Pub. Co. · leaf 333
R. R. is a twin tube struc-ture comprising a subaqueous section 2,668 ft. be done the section shown by Fig. 1 is fairlytypical. ^WESTERLY APPROACH TUNNEL. The westerly approach tunnel extends fromSta. 137 + 40, the end of the open cut, toSta. 158 +75, about 60 ft. west of the dockline at the river,… … KCtrs. 12Ctrs. SEC. AT STA. 158 + 53 See Nolo D SEC. AT STA. 158 + 20 Fig. 1—Typical Section of Westerly Approach Tunnel, Detroit River. long, a westerly approach tunnel 3,669 ft. long,including 1,510.5 ft. of open cut approach, andan easterly approach tunnel 6,449.2 ft. long,including 2,900 ft. of…
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