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
- 123 more...
- アイテムStruc001542 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1964
- アイテムStruc001543 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1964
- アイテムStruc001544 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001545 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1963
- アイテムStruc001546 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001547 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- アイテムStruc001548 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- アイテムStruc001549 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- アイテムStruc001550 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1964
- 220 more...