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
- 3154 more...
- ItemBB032996 - Spokane, Portland and Seattle Railway Engineering Drawing: Renew Bridge, Bridge A29.4S, West of Saint Helens, Oregon, 1958
- ItemBB032997 - Spokane, Portland and Seattle Railway Engineering Drawing: Renew Bridge, Bridge A29.4S, West of Saint Helens, Oregon, undated
- ItemBB032998 - Spokane, Portland and Seattle Railway Engineering Drawing: Renew Bridge, Bridge A29.4S, West of Saint Helens, Oregon, 1959
- ItemBB032999 - Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Grillage, Bridge A29.4S, West of Saint Helens, Oregon, 1932
- ItemBB033000 - Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Grillage, Bridge A29.4S, West of Saint Helens, Oregon, 1932
- ItemBB033001 - Spokane, Portland and Seattle Railway Engineering Drawing: 60 Foot Drawbridge, Bridge A29.4S, West of Saint Helens, Oregon, 1932
- ItemBB033002 - Spokane, Portland and Seattle Railway Engineering Drawing: Tower Details, Bridge A29.4S, West of Saint Helens, Oregon, undated
- ItemBB033003 - Spokane, Portland and Seattle Railway Engineering Drawing: 60 Foot Deck Plate Girder (DPG), Bridge A29.4S, West of Saint Helens, Oregon, undated
- ItemBB033004 - Spokane, Portland and Seattle Railway Engineering Drawing: Reinforcement Abutment, Bridge 29.5 Public Oh, West of Saint Helens, Oregon, 1958
- 755 more...