Railroad Archives Online
- FondD0027 - Timothy Miller Collection
- Sorozat003 - Great Northern Railway Company (U.S.)
- Alsorozat009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 1%% több...
- IratdarabStruc001618 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1971
- IratdarabStruc001619 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- IratdarabStruc001620 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1980
- IratdarabStruc001621 - Great Northern Engineering Drawing, Cascade Tunnel at Berne, Washington, 1956
- IratdarabStruc001622 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1963
- IratdarabStruc001643 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- IratdarabStruc001644 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- IratdarabStruc001645 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, undated
- IratdarabStruc001646 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 1%% több...