Railroad Archives Online
- ФондовиD0027 - Timothy Miller Collection
- Серија003 - Great Northern Railway Company (U.S.)
- Подсерија009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 200 више...
- ЈединицаStruc001619 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001620 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1980
- ЈединицаStruc001621 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1956
- ЈединицаStruc001622 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1963
- ЈединицаStruc001643 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ЈединицаStruc001644 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001645 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, undated
- ЈединицаStruc001646 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001647 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1950
- 143 више...