Railroad Archives Online
- CollectionE0357 - Wade J Stevenson Collection
- Series002 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3008 - Railroads - Electrification
- ItemGNRHS.55.06.49 - Great Northern Electrical Substation at Wenatchee, Washington, undated
- ItemGNRHS.55.14.01 - Great Northern Electrical Substation at Skykomish, Washington, undated
- ItemGNRHS.55.14.02 - Great Northern Electrical Substation at Skykomish, Washington, undated