Railroad Archives Online
- FondsD0027 - Timothy Miller Collection
- Serie003 - Great Northern Railway Company (U.S.)
- Teilserie009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 132 mehr...
- ObjektStruc001551 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1970
- ObjektStruc001552 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1970
- ObjektStruc001553 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1970
- ObjektStruc001554 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1970
- ObjektStruc001555 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ObjektStruc001556 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- ObjektStruc001557 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ObjektStruc001558 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ObjektStruc001559 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 211 mehr...