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
- 7722 more...
- ItemBB034705 - Northern Pacific Engineering Drawing: Shop Plan - Girder and Brace, Bridge 86 - Underpass, South of Vader, Washington, undated
- ItemBB034706 - Northern Pacific Engineering Drawing: Shop Plan - Diaphragm, Miscellaneous, Bridge 86 - Underpass, South of Vader, Washington, undated
- ItemBB038017 - Northern Pacific Engineering Drawing: General Plan, Bridge 552, North of Swift, Montana, 1923
- ItemBB038018 - Northern Pacific Engineering Drawing: General Plan, Bridge 553, North of Swift, Montana, 1923
- ItemBB038085 - Northern Pacific Engineering Drawing: General Plan, Bridge 212 - Private Underpass, North of Hedgesville, Montana, 1918
- ItemBB038183 - Northern Pacific Engineering Drawing: Shop Plan - 24 Foot Through Plate Girder, Bridge 414 - Crowe Creek, North of Geyser, Montana, undated