Railroad Archives Online
- 宗卷D0027 - Timothy Miller Collection
- 系列003 - Great Northern Railway Company (U.S.)
- 次系列009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 11 more...
- 物件Struc001250 - Great Northern Engineering Drawing, Flathead Tunnel at Twin Meadows, Montana, 1975
- 物件Struc001251 - Great Northern Engineering Drawing, Flathead Tunnel at Twin Meadows, Montana, 1973
- 物件Struc001252 - Great Northern Engineering Drawing, Flathead Tunnel at Twin Meadows, Montana, 1977
- 物件Struc001433 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 物件Struc001434 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 物件Struc001435 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 物件Struc001436 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 物件Struc001437 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 物件Struc001438 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 332 more...