Railroad Archives Online
- FondsD0027 - Timothy Miller Collection
- Serie003 - Great Northern Railway Company (U.S.)
- Teilserie009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 176 mehr...
- ObjektStruc001595 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ObjektStruc001596 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ObjektStruc001597 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ObjektStruc001598 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ObjektStruc001599 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ObjektStruc001600 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ObjektStruc001601 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- ObjektStruc001602 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- ObjektStruc001603 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- 167 mehr...