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
- 3708 more...
- ItemBB033735 - Spokane, Portland and Seattle Railway Engineering Drawing: Floor Beams, Stringer, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033736 - Spokane, Portland and Seattle Railway Engineering Drawing: Portal/Struts, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033737 - Spokane, Portland and Seattle Railway Engineering Drawing: Supports, Operating House, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033738 - Spokane, Portland and Seattle Railway Engineering Drawing: Strut, Crank, Bearing, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033739 - Spokane, Portland and Seattle Railway Engineering Drawing: Rollers, Bearings, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033740 - Spokane, Portland and Seattle Railway Engineering Drawing: End Lift Bearing, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033741 - Spokane, Portland and Seattle Railway Engineering Drawing: End Lift Shafting, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033742 - Spokane, Portland and Seattle Railway Engineering Drawing: Large Shaft Bearing, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033743 - Spokane, Portland and Seattle Railway Engineering Drawing: Small Shaft Bearing, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- 201 more...