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
- 1211 more...
- ItemBB015539 - Northern Pacific Engineering Drawing: Shop Plan - Beam/Material, Bridge 29 - Thompson Avenue, Sumner, Washington, undated
- ItemBB015540 - Northern Pacific Engineering Drawing: Stress Sheet, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015541 - Northern Pacific Engineering Drawing: Stress Sheet, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015542 - Northern Pacific Engineering Drawing: Proposed New Structure, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015543 - Northern Pacific Engineering Drawing: Viaduct Reinforcement Girder, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015544 - Northern Pacific Engineering Drawing: Viaduct Reinforcement Girder, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015545 - Northern Pacific Engineering Drawing: Typical Detail Tower Reinforcement, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015546 - Northern Pacific Engineering Drawing: Detail of Girders, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- ItemBB015547 - Northern Pacific Engineering Drawing: Detail of Girders, Bridge 18 - Austin Gulch, West of Skyline, Montana, undated
- 6508 more...