Construction of single-track railroad tunnel passing through central range of Andes in Colombia, at elevation of over 4000 ft, having length of 12,250 ft; problems arising in transporting men and equipment; labor situation as affecting work of contractor; construction equipment; 1000-kv-a hydroelectric plant; methods adopted in driving, timbering and lining; commercial woods found in Nus Valley. Before Eng Inst Canada.
Construction of La Quiebra Tunnel, Colombia, S. A.
Eng J
Engineering Journal ; 16 , n 12
1933
10 pages
Aufsatz (Zeitschrift)
Englisch
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