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
- 1232 more...
- ItemBB015560 - Northern Pacific Engineering Drawing: Detail of Column Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015561 - Northern Pacific Engineering Drawing: Detail of Column Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015562 - Northern Pacific Engineering Drawing: Detail of Column Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015563 - Northern Pacific Engineering Drawing: Detail of Column Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015564 - Northern Pacific Engineering Drawing: Detail Longitudinal Steel Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015565 - Northern Pacific Engineering Drawing: Detail of Longitudinal Brace, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015566 - Northern Pacific Engineering Drawing: Detail of Transverse Brace, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015567 - Northern Pacific Engineering Drawing: Detail of Cap Plates, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015568 - Northern Pacific Engineering Drawing: Detail of Transverse Brace, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- 6487 more...