Railroad Archives Online
- CollectionE0298 - Cordell Newby Photograph Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3005 - Railroads--electrification
- ItemCNBk2img241 - Great Northern Railway electrical substation at Skykomish, Washington in 1970.
- ItemCNBk2img248 - Great Northern Railway powerhouse at Tumwater Canyon, Washington.