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
- 1222 more...
- ItemBB015550 - Northern Pacific Engineering Drawing: Detail of Girders, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015551 - Northern Pacific Engineering Drawing: Erection Diagram, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015552 - Northern Pacific Engineering Drawing: General Plan/Stringers Diagram, Bridge 18 - Austin Gulch, West of Skyline, Montana, 1926
- ItemBB015553 - Northern Pacific Engineering Drawing: Detail of Column Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015554 - Northern Pacific Engineering Drawing: Detail of Column Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015555 - Northern Pacific Engineering Drawing: Detail of Column Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015556 - Northern Pacific Engineering Drawing: Detail of Column Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015557 - Northern Pacific Engineering Drawing: Detail of Column Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015558 - Northern Pacific Engineering Drawing: Detail of Column Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- 6497 more...