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
- 224 more...
- ItemBB033270 - Northern Pacific Engineering Drawing: Rail Strainer Culvert, Culvert, undated
- ItemBB033271 - Northern Pacific Engineering Drawing: Rail Top Box Culvert, Culvert, undated
- ItemBB033888 - Northern Pacific Engineering Drawing: Shop Plan - Print Format, Scale, Spokane, Washington, undated
- ItemBB033889 - Northern Pacific Engineering Drawing: Shop Plan - Block Diagram, Scale, Spokane, Washington, undated
- ItemBB033890 - Northern Pacific Engineering Drawing: Sequence of Operation, Scale, Spokane, Washington, undated
- ItemBB033891 - Northern Pacific Engineering Drawing: Sequence of Operation, Scale, Spokane, Washington, undated
- ItemBB033892 - Northern Pacific Engineering Drawing: Sequence of Operation, Scale, Spokane, Washington, undated
- ItemBB033893 - Northern Pacific Engineering Drawing: Sequence of Operation, Scale, Spokane, Washington, undated
- ItemBB033894 - Northern Pacific Engineering Drawing: Sequence of Operation, Scale, Spokane, Washington, undated
- 95 more...