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
- 3775 more...
- 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
- ItemBB018383 - Northern Pacific Engineering Drawing: Shop Plan - Girder, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- ItemBB018384 - Northern Pacific Engineering Drawing: Shop Plan - Girder, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- ItemBB018385 - Northern Pacific Engineering Drawing: Shop Plan - Cross Frame, etc., Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- ItemBB018386 - Northern Pacific Engineering Drawing: Shop Plan - Casting, Bridge 23.47 - Underpass (I - 5), South of Ketron, Washington, undated
- 3944 more...