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
- 5769 more...
- ItemBB020879 - Northern Pacific Engineering Drawing: Inspection Walks Planking Detail, Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- ItemBB020881 - Northern Pacific Engineering Drawing: Summary of Reinforcement Bar, Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- ItemBB020882 - Northern Pacific Engineering Drawing: 100 Foot Deck Plate Girder (DPG) Skewed, Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- ItemBB020883 - Northern Pacific Engineering Drawing: 100 Foot Deck Plate Girder (DPG) Type 3, Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- ItemBB020884 - Northern Pacific Engineering Drawing: Bearings 100 Foot Deck Plate Girder (DPG), Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- ItemBB020885 - Northern Pacific Engineering Drawing: 75 Foot Deck Plate Girder (DPG)/Typical Detail, Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- ItemBB020886 - Northern Pacific Engineering Drawing: 75 Foot Deck Plate Girder (DPG) Type 2, Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- ItemBB020887 - Northern Pacific Engineering Drawing: 75 Foot Deck Plate Girder (DPG) Type 3, Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- ItemBB020888 - Northern Pacific Engineering Drawing: Bearings 75 Foot Deck Plate Girder (DPG), Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- 1950 more...