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
- 3726 more...
- ItemBB033753 - Spokane, Portland and Seattle Railway Engineering Drawing: Turning Gears, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033754 - Spokane, Portland and Seattle Railway Engineering Drawing: Turning Gears, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033755 - Spokane, Portland and Seattle Railway Engineering Drawing: Main Pinion, Shaft and Bearing, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033756 - Spokane, Portland and Seattle Railway Engineering Drawing: Turning Gear Shaft Bearing, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033757 - Spokane, Portland and Seattle Railway Engineering Drawing: Turning Gear Bearings, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033758 - Spokane, Portland and Seattle Railway Engineering Drawing: Turning Gear Shaft, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033759 - Spokane, Portland and Seattle Railway Engineering Drawing: Brake Wheel Details, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033760 - Spokane, Portland and Seattle Railway Engineering Drawing: Operating House, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033761 - Spokane, Portland and Seattle Railway Engineering Drawing: Turning Machinery, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- 183 more...