Railroad Archives Online
- ФондыD0027 - Timothy Miller Collection
- 003 - Great Northern Railway Company (U.S.)
- 009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 81 more...
- Struc001500 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001501 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001502 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- Struc001503 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001504 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001505 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001506 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001507 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001508 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- 262 more...