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
- 67 more...
- ItemBB015062 - Northern Pacific Engineering Drawing: Proposed Double Reinforcement Box, Culvert, Near Babb, Washington, undated
- ItemBB015400 - Northern Pacific Engineering Drawing: General Plan Concrete Box, Culvert, Near Ketron, Washington, undated
- ItemBB015401 - Northern Pacific Engineering Drawing: Detail Reinforce Concrete Box, Culvert, Near Ketron, Washington, undated
- ItemBB016726 - Northern Pacific Engineering Drawing: Reinforcement Concrete Retaining Wall, Vader, Washington, undated
- ItemBB016727 - Northern Pacific Engineering Drawing: Detail of Section of Walls, Vader, Washington, undated
- ItemBB016728 - Northern Pacific Engineering Drawing: Detail of Wings for Wall, Vader, Washington, undated
- ItemBB016729 - Northern Pacific Engineering Drawing: Revised Detail of Wings, Rev Detail of Wings, Vader, Washington, undated
- ItemBB017515 - Northern Pacific Engineering Drawing: Remodel End Walls, Culvert, Near Saint Regis, Montana, 1944
- ItemBB017516 - Northern Pacific Engineering Drawing: Extension to Culvert, Culvert, Near Frenchtown, Montana, 1944
- 252 more...