Railroad Archives Online
- FondsD0027 - Timothy Miller Collection
- Serie007 - Spokane, Portland, and Seattle Railway
- Teilserie009 - Engineering Records
- 008 - Physical plant drawing
- 009 - Railroads - Electrification
- ObjektStruc009097 - Spokane, Portland, and Seattle Railway Engineering Drawing, Substations (Oregon Electric Railway) (Standard Plan), 1907
- ObjektStruc009098 - Spokane, Portland, and Seattle Railway Engineering Drawing, Substations (Oregon Electric Railway) (Standard Plan), 1907
- ObjektStruc009099 - Spokane, Portland, and Seattle Railway Engineering Drawing, Substations (Oregon Electric Railway) (Standard Plan), 1907
- ObjektStruc009121 - Spokane, Portland, and Seattle Railway Engineering Drawing, Substation (Oregon Electric Railway) at Bendemeer, Oregon, 1943