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
- 3218 more...
- ItemBB017797 - Northern Pacific Engineering Drawing: Details, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017798 - Northern Pacific Engineering Drawing: Construction Sequence 1, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017799 - Northern Pacific Engineering Drawing: Shop Plan - Erection Diagram, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017800 - Northern Pacific Engineering Drawing: Shop Plan - Details, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017801 - Northern Pacific Engineering Drawing: Shop Plan - Diagram, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017802 - Northern Pacific Engineering Drawing: Shop Plan - Details, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017803 - Northern Pacific Engineering Drawing: Shop Plan - Details, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017804 - Northern Pacific Engineering Drawing: General Plan and Bill of Material, Bridge 197 - Saint Regis River, Saint Regis, Montana, undated
- ItemBB017805 - Northern Pacific Engineering Drawing: Details of Abutments, Bridge 197 - Saint Regis River, Saint Regis, Montana, 1965
- 4501 more...