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
- 5136 more...
- ItemBB020049 - Northern Pacific Engineering Drawing: Repairs Span Number 1, Bridge 23.2 - Bitter Root River, South of Florence, Montana, 1943
- ItemBB020058 - Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 30.1 - Boulder River, West of Lime Spur, Montana, undated
- ItemBB020059 - Northern Pacific Engineering Drawing: Shop Plan - Floorbeam, Stringers, Bridge 30.1 - Boulder River, West of Lime Spur, Montana, undated
- ItemBB020060 - Northern Pacific Engineering Drawing: General Plan, Bridge 48 - Deer Lodge River, North of Deer Lodge, Montana, 1928
- ItemBB020061 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 48 - Deer Lodge River, North of Deer Lodge, Montana, undated
- ItemBB020062 - Northern Pacific Engineering Drawing: Details - Girder Connections, Bridge 78, West of Noxon, Montana, undated
- ItemBB020063 - Northern Pacific Engineering Drawing: Details - Deck Slab, Bridge 78, West of Noxon, Montana, undated
- ItemBB020064 - Northern Pacific Engineering Drawing: Masonry Plan, Bridge 78, West of Noxon, Montana, undated
- ItemBB020065 - Northern Pacific Engineering Drawing: General Plan, Bridge 78, West of Noxon, Montana, 1927
- 2583 more...