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
- 3317 more...
- ItemBB033159 - Spokane, Portland and Seattle Railway Engineering Drawing: Main Center Shaft, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033160 - Spokane, Portland and Seattle Railway Engineering Drawing: Main Center Shaft, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033161 - Spokane, Portland and Seattle Railway Engineering Drawing: Latch Bar Cranks, Bridge A94.9 - John Day River, West of Knappa, Oregon, undated
- ItemBB033162 - Spokane, Portland and Seattle Railway Engineering Drawing: Tie Frame Plan, Bridge A97.8 - Columbia River, Astoria, Oregon, 1947
- ItemBB033163 - Spokane, Portland and Seattle Railway Engineering Drawing: Spans/Plate/Bottom Lights, Bridge A97.8 - Columbia River, Astoria, Oregon, undated
- ItemBB033164 - Spokane, Portland and Seattle Railway Engineering Drawing: Stringer Plans, Bridge A99.5, Astoria, Oregon, 1953
- ItemBB033165 - Spokane, Portland and Seattle Railway Engineering Drawing: Renew Ties, Bridge A100.4 - Columbia River - Ties, Astoria, Oregon, 1967
- ItemBB033166 - Spokane, Portland and Seattle Railway Engineering Drawing: Turnout, Bridge A100.4 - Columbia River, Astoria, Oregon, 1957
- ItemBB033167 - Spokane, Portland and Seattle Railway Engineering Drawing: County Road Crossing, Bridge G2.1 - County Road, North of Lyle, Washington, undated
- 592 more...