New tunnel through range of mountains in western Washington will be longest railroad tunnel in America and fifth longest in world; it will be single-track tunnel, concrete lined, with clear width of 16 ft. and height of 20 ft. 10 in. above top of rail; triangulation surveys; method of attack; compressor and power plant; ventilation; drilling; mucking and hauling; record progress on bonus system.
The new cascade eight-mile tunnel for the Great Northern railway
West. Constr. News
Western Construction News ; 2 , n 3
1927
7 pages
14 Figs.
Article (Journal)
English
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Opening the cascade tunnel -- Great northern railway
Engineering Index Backfile | 1929
A 30-mile railway tunnel under the cascade mountains
Engineering Index Backfile | 1916
|The electric system of the great northern railway company at cascade tunnel
Engineering Index Backfile | 1909
|Cascade tunnel completed by Great Northern
Engineering Index Backfile | 1929
|Electric traction in the cascade tunnel of Great Northern Railway U. S. A
Engineering Index Backfile | 1909