Railroad Archives Online
- FondsD0027 - Timothy Miller Collection
- Seri003 - Great Northern Railway Company (U.S.)
- Subseri009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 231 lebih...
- ItemStruc001670 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001671 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001672 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ItemStruc001673 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ItemStruc001674 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1951
- ItemStruc001675 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001676 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc004467 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1968
- ItemStruc004468 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1974
- 112 lebih...