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
- 3651 more...
- ItemBB033678 - Spokane, Portland and Seattle Railway Engineering Drawing: Detail Tie Truss Span, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033679 - Spokane, Portland and Seattle Railway Engineering Drawing: Steel Ties Rail Lock, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033680 - Spokane, Portland and Seattle Railway Engineering Drawing: Span Steel Ties, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033681 - Spokane, Portland and Seattle Railway Engineering Drawing: Steel Tie Plan, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033682 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Rail, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033683 - Spokane, Portland and Seattle Railway Engineering Drawing: Details Rail Lock, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033684 - Spokane, Portland and Seattle Railway Engineering Drawing: Rail Locks, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033685 - Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Bed Plate, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- ItemBB033686 - Spokane, Portland and Seattle Railway Engineering Drawing: Stress Sheet, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Oregon, undated
- 258 more...