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
- 3709 more...
- ItemBB018312 - Northern Pacific Engineering Drawing: Boring Plan, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB018313 - Northern Pacific Engineering Drawing: Boring Plan, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB018314 - Northern Pacific Engineering Drawing: Abutment/Pier/Bridge Layout, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB018315 - Northern Pacific Engineering Drawing: Abutment Number 1, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB018316 - Northern Pacific Engineering Drawing: Abutment Number 1 Detail, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB018317 - Northern Pacific Engineering Drawing: Abutment Number 7, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB018318 - Northern Pacific Engineering Drawing: Abutment Number 7 Detail, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB018319 - Northern Pacific Engineering Drawing: Pier Number 2, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- ItemBB018320 - Northern Pacific Engineering Drawing: Pier Number 3, Bridge 9.46 - I-90, South of Wilburton, Washington, undated
- 4010 more...