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
- 5223 more...
- ItemBB020240 - Northern Pacific Engineering Drawing: Layout, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020241 - Northern Pacific Engineering Drawing: North Abutment - Details, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020242 - Northern Pacific Engineering Drawing: South Abutment - Details, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020243 - Northern Pacific Engineering Drawing: North Abutment - Reinforcement, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020244 - Northern Pacific Engineering Drawing: South Abutment - Reinforcement, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB020245 - Northern Pacific Engineering Drawing: North and South Abutment - Reinforcement/35, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- 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
- 2496 more...