Railroad Archives Online
- FondsD0027 - Timothy Miller Collection
- Seri003 - Great Northern Railway Company (U.S.)
- Subseri009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 174 lebih...
- ItemStruc001593 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ItemStruc001594 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ItemStruc001595 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ItemStruc001596 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ItemStruc001597 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ItemStruc001598 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ItemStruc001599 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ItemStruc001600 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ItemStruc001601 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- 169 lebih...