Railroad Archives Online
- ФондыD0027 - Timothy Miller Collection
- 003 - Great Northern Railway Company (U.S.)
- 009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 238 more...
- Struc004467 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1968
- Struc004468 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1974
- Struc004469 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1973
- Struc004470 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1968
- Struc004471 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1967
- Struc004472 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1966
- Struc004473 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1966
- Struc004474 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1973
- Struc004475 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1973
- 105 more...