Railroad Archives Online
- FondsD0027 - Timothy Miller Collection
- Seri003 - Great Northern Railway Company (U.S.)
- Subseri009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 209 lebih...
- ItemStruc001648 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001649 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ItemStruc001650 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ItemStruc001651 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ItemStruc001652 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ItemStruc001653 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001654 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001655 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001656 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- 134 lebih...