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
- 2938 more...
- ItemBB032770 - Spokane, Portland and Seattle Railway Engineering Drawing: Topographical Map, Bridge 42.7 - Duncan Creek, East of Skamania, Washington, undated
- ItemBB032771 - Spokane, Portland and Seattle Railway Engineering Drawing: Plan of Abutment, Bridge 42.7 - Duncan Creek, East of Skamania, Washington, undated
- ItemBB032772 - Spokane, Portland and Seattle Railway Engineering Drawing: Plan of Abutment, Bridge 42.7 - Duncan Creek, East of Skamania, Washington, undated
- ItemBB032773 - Spokane, Portland and Seattle Railway Engineering Drawing: Renew Base Plate, Bridge 42.7 - Duncan Creek, East of Skamania, Washington, 1963
- ItemBB032776 - Spokane, Portland and Seattle Railway Engineering Drawing: Tie Plan, Bridge 42.7 - Duncan Creek, East of Skamania, Washington, 1944
- ItemBB032777 - Spokane, Portland and Seattle Railway Engineering Drawing: Tie Plan, Bridge 42.7 - Duncan Creek, East of Skamania, Washington, 1920
- ItemBB032778 - Spokane, Portland and Seattle Railway Engineering Drawing: Duncan Creek, Bridge 42.7 - Duncan Creek, East of Skamania, Washington, undated
- ItemBB032779 - Spokane, Portland and Seattle Railway Engineering Drawing: Duncan Creek, Bridge 42.7 - Duncan Creek, East of Skamania, Washington, undated
- ItemBB032780 - Spokane, Portland and Seattle Railway Engineering Drawing: Position of Bearing as Built, Bridge 42.7 - Duncan Creek, East of Skamania, Washington, undated
- 971 more...