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 3007 - Track
- 89 more...
- ItemBB018224 - Northern Pacific Engineering Drawing: Industry Track Wall, Wall for Grade Separation Spokane, Spokane, Washington, undated
- ItemBB018225 - Northern Pacific Engineering Drawing: North/South Wall, Wall for Grade Separation Spokane, Spokane, Washington, undated
- ItemBB018226 - Northern Pacific Engineering Drawing: Elevation North Retaining Walls, Wall for Grade Separation Spokane, Spokane, Washington, undated
- ItemBB018227 - Northern Pacific Engineering Drawing: Elevation North Retaining Walls, Wall for Grade Separation Spokane, Spokane, Washington, undated
- ItemBB018228 - Northern Pacific Engineering Drawing: Elevation North Retaining Walls, Wall for Grade Separation Spokane, Spokane, Washington, undated
- ItemBB018229 - Northern Pacific Engineering Drawing: North Retaining Wall, Wall for Grade Separation Spokane, Spokane, Washington, undated
- ItemBB018230 - Northern Pacific Engineering Drawing: Retaining Wall, Wall for Grade Separation Spokane, Spokane, Washington, undated
- ItemBB018231 - Northern Pacific Engineering Drawing: Wall for Building, Wall for Grade Separation Spokane, Spokane, Washington, undated
- ItemBB018584 - Northern Pacific Engineering Drawing: Reinforcement Concrete Arch, Culvert West of Lombard, West of Lombard, Montana, undated
- 230 more...