Railroad Archives Online
- ФондовиD0027 - Timothy Miller Collection
- Серија003 - Great Northern Railway Company (U.S.)
- Подсерија009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 90 више...
- ЈединицаStruc001509 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001510 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001511 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001512 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001513 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001514 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001515 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001516 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1979
- ЈединицаStruc001517 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1975
- 253 више...