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 3001 - Bridges
- 2525 more...
- ItemBB031605 - Spokane, Portland and Seattle Railway Engineering Drawing: Standard 50 Foot Deck Plate Girder (DPG), undated
- ItemBB031606 - Spokane, Portland and Seattle Railway Engineering Drawing: Standard 60 Foot Deck Plate Girder (DPG), undated
- ItemBB031607 - Spokane, Portland and Seattle Railway Engineering Drawing: Standard 80 Foot Through Plate Girder, undated
- ItemBB031608 - Spokane, Portland and Seattle Railway Engineering Drawing: Extension - 86 Foot Deck Plate Girder (DPG), 1931
- ItemBB031609 - Spokane, Portland and Seattle Railway Engineering Drawing: Bearing 100 Foot Plate Girder, undated
- ItemBB031610 - Spokane, Portland and Seattle Railway Engineering Drawing: Standard 100 Foot Deck Plate Girder (DPG), undated
- ItemBB031611 - Spokane, Portland and Seattle Railway Engineering Drawing: Standard 110 Foot Deck Plate Girder (DPG), undated
- ItemBB031612 - Spokane, Portland and Seattle Railway Engineering Drawing: Standard 35 Foot Deck Plate Girder (DPG), undated
- ItemBB031613 - Spokane, Portland and Seattle Railway Engineering Drawing: Standard 75 Foot Deck Plate Girder (DPG), undated
- 1384 more...