Railroad Archives Online
- FondsD0027 - Timothy Miller Collection
- Seri003 - Great Northern Railway Company (U.S.)
- Subseri009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 221 lebih...
- ItemStruc001660 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ItemStruc001661 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ItemStruc001662 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001663 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001664 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001665 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ItemStruc001666 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ItemStruc001667 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001668 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 122 lebih...