New bore through Cascades converts 75 mi. of Great Northern Railroad from steam to electric; electric locomotives; control on down grades; shatters all building records; upgrade from water.
Longest U.S. Tunnel, 8 Miles
Pub. Service Mgmt
Public Service Management ; 46 , n 2
1929
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
Longest tunnel gets welded rail
Engineering Index Backfile | 1949
The worlds longest road tunnel
Tema Archive | 1999
|Longest tunnel gets welded rail
Engineering Index Backfile | 1949
Longest tunnel gets welded rail
Engineering Index Backfile | 1949
The longest railway tunnel in America
Engineering Index Backfile | 1917