Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2004 - Railroad tracks
- Subseries Level 3001 - Railroad mainline
- 7 more...
- ItemWWASPSL4-038 - Burlington Northern Mainline near Lyle, Washington, undated
- ItemWWASPSL4-057 - Burlington Northern Mainline, Washington State, undated
- ItemWWASPSL6-019 - Burlington Northern Goldendale Branch, Washington, undated
- ItemWWASPSL6-020 - Burlington Northern Goldendale Branch at Pitt, Washington, February 7, 1990
- ItemWWASPSL7-080 - Burlington Northern Mainline at Fish Lake Junction, Washington, March 6, 1986
- ItemWWASPSL7-081 - Burlington Northern Mainline at Fish Lake Junction, Washington, March 6, 1986
- ItemWWASPSL7-082 - Burlington Northern Mainline at Fish Lake Junction, Washington, June 29, 1987
- ItemWWASPSL7-083 - Burlington Northern Mainline at Fish Lake Junction, Washington, March 20, 1986
- ItemWWASPSL8-005 - Burlington Northern Mainline at Linnton, Oregon, undated
- 3 more...