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
- 3300 more...
- ItemBB033142 - Spokane, Portland and Seattle Railway Engineering Drawing: General Plan of Lock Gears, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033143 - Spokane, Portland and Seattle Railway Engineering Drawing: Erection Plan, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033144 - Spokane, Portland and Seattle Railway Engineering Drawing: Center Floor Beam/Brackets, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033145 - Spokane, Portland and Seattle Railway Engineering Drawing: Center Sections Main Girder, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033146 - Spokane, Portland and Seattle Railway Engineering Drawing: End Sections Main Girder, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033147 - Spokane, Portland and Seattle Railway Engineering Drawing: Floor Beams and Connection Plate, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033148 - Spokane, Portland and Seattle Railway Engineering Drawing: Bottom Lateral Struts, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033149 - Spokane, Portland and Seattle Railway Engineering Drawing: Top and Bottom Lateral Strut, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033150 - Spokane, Portland and Seattle Railway Engineering Drawing: Track Stringers, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- 609 more...