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
- 754 more...
- ItemBB015027 - Northern Pacific Engineering Drawing: Shop Plan - Bearing Device, Bridge 73 - Clark Fork River, West of Noxon, Montana, undated
- ItemBB015028 - Northern Pacific Engineering Drawing: Shop Plan - Bridge Girder, Bridge 73 - Clark Fork River, West of Noxon, Montana, undated
- ItemBB015029 - Northern Pacific Engineering Drawing: Shop Plan - Center of Gravity Computation, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- ItemBB015030 - Northern Pacific Engineering Drawing: Shop Plan - Counterweight, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- ItemBB015031 - Northern Pacific Engineering Drawing: Location of Bents/Bridge Ends, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- ItemBB015032 - Northern Pacific Engineering Drawing: Assembly End Lock Machinery, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- ItemBB015033 - Northern Pacific Engineering Drawing: Assembly of Operating Machinery, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- ItemBB015034 - Northern Pacific Engineering Drawing: Assembly of Operating Machinery, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- ItemBB015035 - Northern Pacific Engineering Drawing: Shop Plan - Counterweight Bearing, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- 6965 more...