Railroad Archives Online
- D0027 - Timothy Miller Collection
- Ro`yxat003 - Great Northern Railway Company (U.S.)
- Ro`yxat-osti009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 213 more...
- Struc001652 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- Struc001653 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001654 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001655 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001656 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- Struc001657 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001658 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001659 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001660 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- 130 more...