Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3009 - Railroads - Electrification
- ItemStruc009097 - Spokane, Portland, and Seattle Railway Engineering Drawing, Substations (Oregon Electric Railway) (Standard Plan), 1907
- ItemStruc009098 - Spokane, Portland, and Seattle Railway Engineering Drawing, Substations (Oregon Electric Railway) (Standard Plan), 1907
- ItemStruc009099 - Spokane, Portland, and Seattle Railway Engineering Drawing, Substations (Oregon Electric Railway) (Standard Plan), 1907
- ItemStruc009121 - Spokane, Portland, and Seattle Railway Engineering Drawing, Substation (Oregon Electric Railway) at Bendemeer, Oregon, 1943