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
- 5511 more...
- ItemBB020607 - Northern Pacific Engineering Drawing: Shop Plan - Ballast Plate, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB020608 - Northern Pacific Engineering Drawing: Shop Plan - Ballast Plate, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB020609 - Northern Pacific Engineering Drawing: Shop Plan - Ballast Plate, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB020610 - Northern Pacific Engineering Drawing: Shop Plan - Stringer, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB020611 - Northern Pacific Engineering Drawing: Shop Plan - Walk Plate, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB020612 - Northern Pacific Engineering Drawing: Shop Plan - Walk Plate, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB020613 - Northern Pacific Engineering Drawing: Shop Plan - Walk Plate, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB020614 - Northern Pacific Engineering Drawing: Shop Plan - Walk Plate, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB020615 - Northern Pacific Engineering Drawing: Shop Plan - Walk Plate, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- 2208 more...