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
- 5229 more...
- ItemBB020246 - Northern Pacific Engineering Drawing: Pier Details, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020247 - Northern Pacific Engineering Drawing: Pier Reinforcement, Bridge 23.1 - Underpass, South of Ketron, Washington, 1935
- ItemBB020248 - Northern Pacific Engineering Drawing: Deck Slabs - South Track, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020249 - Northern Pacific Engineering Drawing: Deck Slab - Number Track, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020250 - Northern Pacific Engineering Drawing: Handrail Details, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020251 - Northern Pacific Engineering Drawing: General Plan - Approach Girder, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020252 - Northern Pacific Engineering Drawing: General Plan - Approach Girder, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020253 - Northern Pacific Engineering Drawing: General Plan - Approach Girder, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020254 - Northern Pacific Engineering Drawing: Girder Bearing Details, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- 2490 more...