Railroad Archives Online
- ФондовиD0027 - Timothy Miller Collection
- Серија003 - Great Northern Railway Company (U.S.)
- Подсерија009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 207 више...
- ЈединицаStruc001646 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001647 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1950
- ЈединицаStruc001648 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001649 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ЈединицаStruc001650 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ЈединицаStruc001651 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ЈединицаStruc001652 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ЈединицаStruc001653 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ЈединицаStruc001654 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 136 више...