Chicago : Engineering and Contracting Pub. Co. · leaf 413
ock on this contract is Hud-son River shale and varies from exceedingly of ones head to large ones containing sever:cu. yds. were found. Inasmuch as therelittle or no running water down this valley-the water shed being very small—the abo\conditions seem to show that this valleya pre-glacial gorge… … [nqKontcj 400 Fig. 1—Sketch Showing Typical Cross Section of Locks on Contract II, NewYork Barge Canal. hard to a very soft shale, which disintegrates with great rapidity when exposed lo theweather. Between Sta. 220 and Sta. 208 therock in the bottom of the valley is very smoothand bard, for a…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
