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
- 194 more...
- ItemStruc001613 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ItemStruc001614 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, undated
- ItemStruc001615 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1956
- ItemStruc001616 - Great Northern Engineering Drawing, Cascade Tunnel at Scenic, Washington, 1956
- ItemStruc001617 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1971
- ItemStruc001618 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1971
- ItemStruc001619 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ItemStruc001620 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1980
- ItemStruc001621 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1956
- 149 more...