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
- 180 more...
- Struc001599 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- Struc001600 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- Struc001601 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- Struc001602 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001603 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- Struc001604 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- Struc001605 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- Struc001606 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- Struc001607 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 163 more...