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
- 4660 more...
- ItemBB019401 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 96 (313), West of Colby, Montana, 1939
- ItemBB019402 - Northern Pacific Engineering Drawing: Floor Beam/Stringers, Bridge 39 - Umatilla River, Union Pacific Connection, Washington, undated
- ItemBB019403 - Northern Pacific Engineering Drawing: Shop Plan - Truss Span, Bridge 39 - Umatilla River, Union Pacific Connection, Washington, undated
- ItemBB019404 - Northern Pacific Engineering Drawing: Cast/Pedestal, Bridge 39 - Umatilla River, Union Pacific Connection, Washington, undated
- ItemBB019405 - Northern Pacific Engineering Drawing: Shoe/Rocker/Bed Plates, Bridge 39 - Umatilla River, Union Pacific Connection, Washington, undated
- ItemBB019406 - Northern Pacific Engineering Drawing: Floor Beam/Stringers, Bridge 39 - Umatilla River, Union Pacific Connection, Washington, undated
- ItemBB019407 - Northern Pacific Engineering Drawing: Shop Plan - Erection Diagram, Bridge 39 - Umatilla River, Union Pacific Connection, Washington, undated
- ItemBB019408 - Northern Pacific Engineering Drawing: Shop Plan - Truss Span, Bridge 39 - Umatilla River, Union Pacific Connection, Washington, undated
- ItemBB019409 - Northern Pacific Engineering Drawing: Shop Plan - Truss Span, Bridge 39 - Umatilla River, Union Pacific Connection, Washington, undated
- 3059 more...