Elimination of double-track Ona tunnel, 1316 ft. in length in main line improvement on Chesapeake and Ohio near Huntington, W. Va.; high-lift shovel, loading material from cut averages 1000 yd. per 10-hr. day; demolition of tunnel lining and timbering.
Deep open cut replaces railroad tunnel
Construction Methods
Construction Methods ; 12 , n 3
1930
4 pages
8 Figs.
Aufsatz (Zeitschrift)
Englisch
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