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 3007 - Track
- ItemStruc000360 - Spokane, Portland, and Seattle Railway Engineering Drawing, Load Adjuster at Vancouver, Washington, 1949
- ItemStruc000361 - Spokane, Portland, and Seattle Railway Engineering Drawing, Load Adjuster at Vancouver, Washington, 1961
- ItemStruc000363 - Spokane, Portland, and Seattle Railway Engineering Drawing, Load Adjuster at Vancouver, Washington, 1949
- ItemStruc009212 - Spokane, Portland, and Seattle Railway Engineering Drawing, Interlocking Station at North Portland, Oregon, 1948
- ItemStruc009213 - Spokane, Portland, and Seattle Railway Engineering Drawing, Interlocking Station at North Portland, Oregon, 1948
- ItemStruc009589 - Spokane, Portland, and Seattle Railway Engineering Drawing, Crossing of Meter Box by Spur at Willbridge, Oregon, 1947
- 86 more...