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
- 181 more...
- アイテムStruc001600 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- アイテムStruc001601 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- アイテムStruc001602 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001603 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- アイテムStruc001604 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- アイテムStruc001605 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001606 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- アイテムStruc001607 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1956
- アイテムStruc001608 - Great Northern Engineering Drawing, Cascade Tunnel, Washington, 1957
- 162 more...