Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroad Buildings and Structures
- Subseries Level 3001 - Bridges
- 57 more...
- ItemJMF04-02871.0 - Northern Pacific bridge at Martin, Washington, circa 1917.
- ItemJMF04-02873.0 - Northern Pacific mainline at Stampede Pass, Washington Territory, circa 1887.
- ItemJMF04-02874.0 - Northern Pacific bridge at Stampede Pass, Washington Territory, circa 1887.
- ItemJMF04-02875.0 - Northern Pacific switchback at Stampede Pass, Washington Territory, circa 1887.
- ItemJMF04-02876.0 - Northern Pacific bridge at Stampede Pass, Washington Territory, circa 1887.
- ItemJMF04-02878.0 - Northern Pacific bridge at Stampede Pass, Washington, circa 1890.
- ItemJMF04-02904.2 - Northern Pacific bridge at Buckley, Washington, circa 1905.
- ItemJMF04-02942.1 - Northern Pacific bridge at Cicero, Washington, in 1924.
- ItemJMF04-03003.1 - Northern Pacific trestle bridge at Wetico, Washington, in June 18, 1920.
- 13 more...