Railroad Archives Online
- ArkivD0027 - Timothy Miller Collection
- Serie003 - Great Northern Railway Company (U.S.)
- Underserie009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 341 mer...
- ObjektStruc004570 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004571 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004572 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004573 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004574 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004575 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004576 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004577 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1975
- ObjektStruc004578 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- 2 mer...