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
- 654 more...
- ItemBB014924 - Northern Pacific Engineering Drawing: Bar List, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014925 - Northern Pacific Engineering Drawing: Bar Type/Dimension, etc., Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014926 - Northern Pacific Engineering Drawing: Girder Span, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014927 - Northern Pacific Engineering Drawing: Girder Span, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014928 - Northern Pacific Engineering Drawing: Girder Span/Shoe/Miscellaneous, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014929 - Northern Pacific Engineering Drawing: Truss Span/Stress Sheet, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014930 - Northern Pacific Engineering Drawing: Truss Span, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014931 - Northern Pacific Engineering Drawing: Truss Span, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014932 - Northern Pacific Engineering Drawing: Truss Span/Ladder, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- 7065 more...