Railroad Archives Online
- FondiD0027 - Timothy Miller Collection
- Serija003 - Great Northern Railway Company (U.S.)
- Podserija009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 134 more...
- DokumentStruc001553 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1970
- DokumentStruc001554 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1970
- DokumentStruc001555 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- DokumentStruc001556 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- DokumentStruc001557 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- DokumentStruc001558 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- DokumentStruc001559 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- DokumentStruc001560 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- DokumentStruc001561 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 209 more...