Railroad Archives Online
- フォンドD0027 - Timothy Miller Collection
- シリーズ003 - Great Northern Railway Company (U.S.)
- サブシリーズ009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 44 more...
- アイテムStruc001463 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001464 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001465 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001466 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001467 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001468 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001469 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001470 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001471 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 299 more...