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
- 311 more...
- ItemBB014537 - Northern Pacific Engineering Drawing: Substructure Details, Bridge 50 - Little Blackfoot River, North of Deer Lodge, Montana, undated
- ItemBB014538 - Northern Pacific Engineering Drawing: Beam Spans and Miscellaneous, Bridge 50 - Little Blackfoot River, North of Deer Lodge, Montana, undated
- ItemBB014539 - Northern Pacific Engineering Drawing: Bearing Details, Bridge 50 - Little Blackfoot River, North of Deer Lodge, Montana, undated
- ItemBB014540 - Northern Pacific Engineering Drawing: Deck Details and Bill of Material, Bridge 50 - Little Blackfoot River, North of Deer Lodge, Montana, undated
- ItemBB014545 - Northern Pacific Engineering Drawing: General Plan, Bridge 114.1 - Clark Fork River, West of Bonner, Montana, 1939
- ItemBB014546 - Northern Pacific Engineering Drawing: Detail of Strut S1, Bridge 114.1 - Clark Fork River, West of Bonner, Montana, undated
- ItemBB014547 - Northern Pacific Engineering Drawing: Detail of Strut S2, Bridge 114.1 - Clark Fork River, West of Bonner, Montana, undated
- ItemBB014548 - Northern Pacific Engineering Drawing: Reinforce Top Flange, Bridge 114.1 - Clark Fork River, West of Bonner, Montana, 1940
- ItemBB014550 - Northern Pacific Engineering Drawing: Shim Plan and Steel Details, Bridge 114.1 - Clark Fork River, West of Bonner, Montana, undated
- 7408 more...