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
- 6018 more...
- ItemBB025676 - Northern Pacific Engineering Drawing: Shop Plan - Lift Guard, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025677 - Northern Pacific Engineering Drawing: Shop Plan - Lift Guard, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025678 - Northern Pacific Engineering Drawing: Shop Plan - Lift Girder Detail, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025679 - Northern Pacific Engineering Drawing: Shop Plan - Lift Guard, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025680 - Northern Pacific Engineering Drawing: Shop Plan - Lift Guard, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025681 - Northern Pacific Engineering Drawing: Shop Plan - Lift Guard, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025682 - Northern Pacific Engineering Drawing: Shop Plan - Ladder/Handrail, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025683 - Northern Pacific Engineering Drawing: Shop Plan - Lift Guard, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- ItemBB025684 - Northern Pacific Engineering Drawing: Shop Plan - Braces, Bridge 1 - Columbia River, West of Pasco, Washington, undated
- 1701 more...