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
- 10 more...
- ItemJMF04-02727.0 - Northern Pacific footbridge at Martin, Washington, in 1943.
- ItemJMF04-02728.0 - Northern Pacific footbridge at Martin, Washington, in 1945.
- ItemJMF04-02806.1 - Northern Pacific bridge at Cle Elum, Washington Territory, in 1887.
- ItemJMF04-02806.2 - Northern Pacific trestle at Cle Elum, Washington Territory, in 1887.
- ItemJMF04-02807.0 - Northern Pacific trestle near Cle Elum, Washington Territory, in 1887.
- ItemJMF04-02808.1 - Northern Pacific trestle near Cle Elum, Washington Territory, in 1887.
- ItemJMF04-02809.0 - Northern Pacific bridge at Deep Creek, Washington Territory, 1887.
- ItemJMF04-02811.0 - Northern Pacific bridge number 2 at Stampede Pass, Washington Territory, 1887.
- ItemJMF04-02812.0 - Northern Pacific bridge number 4 at Stampede Pass, Washington Territory, 1887.
- 60 more...