Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series010 - Other Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3001 - Bridges
- ItemJMF11-09921.0 - Cowlitz, Chehalis & Cascade Railway Timber Bridge at Mayfield, Washington in 1955.
- ItemJMF23-14945.0 - British Columbia Railway Company bridge at East Pine River, British Columbia on May 27, 1990.
- ItemJMF23-14946.0 - British Columbia Railway Company bridge at East Pine River, British Columbia on May 27, 1990.
- ItemJMF23-14938.0 - British Columbia Railway Company bridge at North of Lillooet, British Columbia in August 1990.
- ItemJMF19-14258.0 - Esquimalt & Nanaimo Railway Company bridge at Victoria, BC, circa 1887.
- ItemJMF19-14254.0 - Canadian Pacific Railway trestle bridge CP 354 at Mountain Creek, BC, circa 1900.
- ItemJMF19-14273.9 - Four locomotives on a trestle bridge in Colorado, circa 1925.
- ItemJMF19-14273.8 - Georgetown Loop Railroad bridge at Georgetown, Colorado, circa 1985.