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
- 6774 more...
- ItemBB028741 - Northern Pacific Engineering Drawing: Detail of Plate Girder, Bridge 51 (50), West of Spire Rock, Montana, undated
- ItemBB028742 - Northern Pacific Engineering Drawing: Shop Plan - Floor Beam, Bridge 218 - Clark Fork River, West of Quinns, Montana, undated
- ItemBB028743 - Northern Pacific Engineering Drawing: Shop Plan - Floor Beam, Bridge 218 - Clark Fork River, West of Quinns, Montana, undated
- ItemBB028744 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Lateral, Bridge 218 - Clark Fork River, West of Quinns, Montana, undated
- ItemBB028745 - Northern Pacific Engineering Drawing: Shop Plan - End Stringer, Bridge 218 - Clark Fork River, West of Quinns, Montana, undated
- ItemBB028746 - Northern Pacific Engineering Drawing: Shop Plan - Bill of Material, Bridge 218 - Clark Fork River, West of Quinns, Montana, undated
- ItemBB028747 - Northern Pacific Engineering Drawing: Shop Plan - Bill of Material, Bridge 218 - Clark Fork River, West of Quinns, Montana, undated
- ItemBB028748 - Northern Pacific Engineering Drawing: Shop Plan - Bill of Material, Bridge 218 - Clark Fork River, West of Quinns, Montana, undated
- ItemBB028752 - Northern Pacific Engineering Drawing: Shop Plan - Bill of Material, Bridge 53 - Willapa River, Raymond, Washington, undated
- 945 more...