Railroad Archives Online
- FondsD0027 - Timothy Miller Collection
- Seri003 - Great Northern Railway Company (U.S.)
- Subseri009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 15 lebih...
- ItemStruc001434 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001435 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001436 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001437 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001438 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001439 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001440 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001441 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ItemStruc001442 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 328 lebih...