Railroad Archives Online
- ФондовиD0027 - Timothy Miller Collection
- Серија003 - Great Northern Railway Company (U.S.)
- Подсерија009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 107 више...
- ЈединицаStruc001526 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001527 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001528 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001529 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001530 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001531 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1956
- ЈединицаStruc001532 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001533 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001534 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 236 више...