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
- 3284 more...
- ItemBB033126 - Spokane, Portland and Seattle Railway Engineering Drawing: General Plan, Bridge A86.6 - Overpass, Knappa, Oregon, 1961
- ItemBB033127 - Spokane, Portland and Seattle Railway Engineering Drawing: Bill of Material, Bridge A86.6 - Overpass, Knappa, Oregon, undated
- ItemBB033128 - Spokane, Portland and Seattle Railway Engineering Drawing: Stringer Frame Details, Bridge A86.6 - Overpass, Knappa, Oregon, undated
- ItemBB033129 - Spokane, Portland and Seattle Railway Engineering Drawing: Cap, Girder and Handrail, Bridge A86.6 - Overpass, Knappa, Oregon, undated
- ItemBB033130 - Spokane, Portland and Seattle Railway Engineering Drawing: General Plan and Details, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033131 - Spokane, Portland and Seattle Railway Engineering Drawing: Foundations, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033132 - Spokane, Portland and Seattle Railway Engineering Drawing: Foundations, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033133 - Spokane, Portland and Seattle Railway Engineering Drawing: Foundations, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033134 - Spokane, Portland and Seattle Railway Engineering Drawing: Plan of Foundations, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- 625 more...