Railroad Archives Online
- CollectionE0045A - Great Northern Railway- Blueprint-Authorization for Expenditure Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3008 - Tunnels
- 14 more...
- ItemJSBP0526 - Great Northern Railway Historical Society Blueprint Collection JSBP0526, Blacktail, Montana, undated.
- ItemJSBP0843 - Great Northern Railway Historical Society Blueprint Collection JSBP0843, Cascade Tunnel, Washington, 1919.
- ItemJSBP1018 - Great Northern Railway Historical Society Blueprint Collection JSBP1018, Crater, Washington, 1938.
- ItemJSBP1019 - Great Northern Railway Historical Society Blueprint Collection JSBP1019, Crater, Washington, 1938.
- ItemJSBP1020 - Great Northern Railway Historical Society Blueprint Collection JSBP1020, Crater, Washington, 1940.
- ItemJSBP1021 - Great Northern Railway Historical Society Blueprint Collection JSBP1021, Crater, Washington, 1940.
- ItemJSBP1022 - Great Northern Railway Historical Society Blueprint Collection JSBP1022, Crater, Washington, 1940.
- ItemJSBP1023 - Great Northern Railway Historical Society Blueprint Collection JSBP1023, Crater, Washington, 1941.
- ItemJSBP1024 - Great Northern Railway Historical Society Blueprint Collection JSBP1024, Crater, Washington, 1941.
- 33 more...