Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3008 - Tunnels
- 97 more...
- ItemStruc001516 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1979
- ItemStruc001517 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1975
- ItemStruc001518 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1975
- ItemStruc001519 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1975
- ItemStruc001520 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001521 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001522 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001523 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, undated
- ItemStruc001524 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 246 more...