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
- 1249 more...
- ItemBB015577 - Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015578 - Northern Pacific Engineering Drawing: Shop Plan - Cross Frame/Brace, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015579 - Northern Pacific Engineering Drawing: Shop Plan - Brace/Masonry, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015580 - Northern Pacific Engineering Drawing: Shop Plan - Beam/Material, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015581 - Northern Pacific Engineering Drawing: Shop Plan - Beam/Material, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015582 - Northern Pacific Engineering Drawing: Reinforce 61 Foot Span, Bridge 17 - Greenhorn Gulch, West of Weed, Montana, undated
- ItemBB015583 - Northern Pacific Engineering Drawing: Erection Diagram, Bridge 17 - Greenhorn Gulch, West of Weed, Montana, undated
- ItemBB015584 - Northern Pacific Engineering Drawing: General Plan/Stress Sheet, Bridge 17 - Greenhorn Gulch, West of Weed, Montana, 1925
- ItemBB015585 - Northern Pacific Engineering Drawing: Detail of Column Reinforcement, Bridge 17 - Greenhorn Gulch, West of Weed, Montana, undated
- 6470 more...