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
- 3291 more...
- 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
- ItemBB033135 - Spokane, Portland and Seattle Railway Engineering Drawing: Plan of Foundations, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033136 - Spokane, Portland and Seattle Railway Engineering Drawing: Swing Span Protection, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033137 - Spokane, Portland and Seattle Railway Engineering Drawing: Tie Frame Plan, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033138 - Spokane, Portland and Seattle Railway Engineering Drawing: Rail Locks, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033139 - Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Bed Plate, Bridge A94.9 - John Day River, Oregon, undated
- ItemBB033140 - Spokane, Portland and Seattle Railway Engineering Drawing: Stress Sheet, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033141 - Spokane, Portland and Seattle Railway Engineering Drawing: General Plan of Center, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- 618 more...