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
- 708 more...
- ItemBB014978 - Northern Pacific Engineering Drawing: Shop Plan - Floor Beam/Stringer, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014979 - Northern Pacific Engineering Drawing: Shop Plan - Posts, etc., Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014980 - Northern Pacific Engineering Drawing: Shop Plan - Top Chord, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014981 - Northern Pacific Engineering Drawing: Shop Plan - Stringers, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014982 - Northern Pacific Engineering Drawing: Shop Plan - Stringers, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014983 - Northern Pacific Engineering Drawing: Shop Plan - Stringers, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014984 - Northern Pacific Engineering Drawing: Shop Plan - Ladders, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014985 - Northern Pacific Engineering Drawing: Shop Plan - Diagonal/Post, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014986 - Northern Pacific Engineering Drawing: Shop Plan - Stringer/Diaphragm, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- 7011 more...