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
- 357 more...
- ItemBB014598 - Northern Pacific Engineering Drawing: General Plan, Bridge 9 (268) - Concoma Creek, West of Plains, Montana, 1901
- ItemBB014599 - Northern Pacific Engineering Drawing: Foundation Plan, Bridge 9 (268) - Concoma Creek, West of Plains, Montana, undated
- ItemBB014600 - Northern Pacific Engineering Drawing: Alternative Abutment to Reinforcement, Bridge 9 (268) - Concoma Creek, West of Plains, Montana, undated
- ItemBB014601 - Northern Pacific Engineering Drawing: Precast Concrete Shims, Bridge 9 (268) - Concoma Creek, West of Plains, Montana, undated
- ItemBB014602 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 9 (268) - Concoma Creek, West of Plains, Montana, 1956
- ItemBB014603 - Northern Pacific Engineering Drawing: Crossing Finlay Creek, Bridge 21.8 - Finlay Creek, West of Arlee, Montana, 1901
- ItemBB014604 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 21.8 - Finlay Creek, West of Arlee, Montana, 1957
- ItemBB014605 - Northern Pacific Engineering Drawing: General Plan, Bridge 42 (65), West of Avon, Montana, 1901
- ItemBB014606 - Northern Pacific Engineering Drawing: General Plan/Falsework, Bridge 42 (65), West of Avon, Montana, undated
- 7362 more...