Railroad Archives Online
- ФондовиD0027 - Timothy Miller Collection
- Серија003 - Great Northern Railway Company (U.S.)
- Подсерија009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 218 више...
- ЈединицаStruc001657 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001658 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001659 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001660 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ЈединицаStruc001661 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ЈединицаStruc001662 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001663 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001664 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001665 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- 125 више...