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
- 668 more...
- ItemBB014938 - Northern Pacific Engineering Drawing: Tie Details/Bill of Material, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014939 - Northern Pacific Engineering Drawing: Miscellaneous Deck Details, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014940 - Northern Pacific Engineering Drawing: Shop Plan - Erection Plan, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014941 - Northern Pacific Engineering Drawing: Shop Plan - Erection Plan, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014942 - Northern Pacific Engineering Drawing: Shop Plan - Truss Span, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014943 - Northern Pacific Engineering Drawing: Shop Plan - Trainman Walk, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014944 - Northern Pacific Engineering Drawing: Shop Plan - Trainman Walk, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014945 - Northern Pacific Engineering Drawing: Shop Plan - Bearing Devices, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- ItemBB014946 - Northern Pacific Engineering Drawing: Shop Plan - Bridge Girders, Bridge 57 - Clark Fork River, Trout Creek, Montana, undated
- 7051 more...