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
- 691 more...
- ItemBB014961 - Northern Pacific Engineering Drawing: Shop Plan - Top Chord, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014962 - Northern Pacific Engineering Drawing: Shop Plan - Sway Brace, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014963 - Northern Pacific Engineering Drawing: Shop Plan - Sway Brace, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014964 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014965 - Northern Pacific Engineering Drawing: Shop Plan - Brace/Strut, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014966 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014967 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014968 - Northern Pacific Engineering Drawing: Shop Plan - Top Chord, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014969 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Chord, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- 7028 more...