Railroad Archives Online
- SafnD0027 - Timothy Miller Collection
- Skjalaflokkur003 - Great Northern Railway Company (U.S.)
- Undirskjalaflokkur009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 63 more...
- EiningStruc001482 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1954
- EiningStruc001483 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1954
- EiningStruc001484 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1948
- EiningStruc001485 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1954
- EiningStruc001486 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- EiningStruc001487 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- EiningStruc001488 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- EiningStruc001489 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- EiningStruc001490 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 280 more...