Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3001 - Bridges
- 3771 more...
- ItemBB018374 - Northern Pacific Engineering Drawing: Handrail Details, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- ItemBB018375 - Northern Pacific Engineering Drawing: Drainage, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- ItemBB018376 - Northern Pacific Engineering Drawing: Shoofly Layout, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- ItemBB018377 - Northern Pacific Engineering Drawing: Shoofly Detail, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- ItemBB018378 - Northern Pacific Engineering Drawing: Shop Plan - Anchor Bolt, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- ItemBB018379 - Northern Pacific Engineering Drawing: Shop Plan - Anchor Bolt, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- ItemBB018380 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- ItemBB018381 - Northern Pacific Engineering Drawing: Shop Plan - Bolt Plan, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- ItemBB018382 - Northern Pacific Engineering Drawing: Shop Plan - Ballast, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- 3948 more...