Description of 7.8-mile tunnel, built at cost of $15,000,000; records broken in tunnelings; tunneling methods; serious water troubles; discharge from west portal, amounting at one time, to 9000 g.p.m.
Great Northern breaks records in tunnel project
Ry. Age
Railway Age ; 86 , n 4
1929
4 pages
7 Figs.
Article (Journal)
English
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