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
- 92 more...
- 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
- ItemBB018585 - Northern Pacific Engineering Drawing: Plan Walk/Railing, Culvert West of Craver, West of Craver, Montana, undated
- ItemBB018586 - Northern Pacific Engineering Drawing: Concrete Arch Close J, Arch, Near Colby, Montana, undated
- ItemBB018587 - Northern Pacific Engineering Drawing: Stone Arch, Arch at Milepost 8, West of Sandpoint, Idaho, undated
- 227 more...