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
- 3502 more...
- ItemBB033521 - Spokane, Portland and Seattle Railway Engineering Drawing: Beam Spans Concrete/Bridge, Bridge 0.1 - North Portland Road, North Portland Junction, Oregon, undated
- ItemBB033522 - Spokane, Portland and Seattle Railway Engineering Drawing: Construct Procedure, Bridge 0.1 - North Portland Road, North Portland Junction, Oregon, undated
- ItemBB033523 - Spokane, Portland and Seattle Railway Engineering Drawing: Boring Logs, Bridge 0.1 - North Portland Road, North Portland Junction, Oregon, undated
- ItemBB033524 - Spokane, Portland and Seattle Railway Engineering Drawing: Sketch Map, Bridge 0.1 - North Portland Road, North Portland Junction, Oregon, undated
- ItemBB033525 - Spokane, Portland and Seattle Railway Engineering Drawing: Plan and Profile - Highway, Bridge 0.1 - North Portland Road, North Portland Junction, Oregon, undated
- ItemBB033526 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Erection Plan, Bridge 0.1 - North Portland Road, North Portland Junction, Oregon, undated
- ItemBB033527 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Erection Plan, Bridge 0.1 - North Portland Road, North Portland Junction, Oregon, undated
- ItemBB033528 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Erection Plan, Bridge 0.1 - North Portland Road, North Portland Junction, Oregon, undated
- ItemBB033529 - Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Floor and Placement Plan, Bridge 0.1 - North Portland Road, North Portland Junction, Oregon, undated
- 407 more...