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
- 36 more...
- アイテムStruc001455 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001456 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001457 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001458 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001459 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1955
- アイテムStruc001460 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001461 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001462 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001463 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- 307 more...