Northern Pacific bridge at Bellingham, Washington. Looking northwest across Great Northern main track at Northern Pacific main track on trestle with log dump and former E. K. Wood Lumber Company structures; photograph sequence TRWahl0871, 1075. Other subject categories: Bridge-Trestle, Logs, Structure, Piling

Northern Pacific bridge at Deming, Washington looking northwest from Washington State Highway 9 bridge to bridge 110 over Nooksack River; photograph sequence TRWahl0393-0390. Other subject categories: Bridge-Truss, Bridge-Plate Girder, Structure, River

Northern Pacific bridges number 1 and 3 at Martin, Washington Territory, 1887. Trestles at east end of Stampede Pass switchback. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback

Northern Pacific bridges number 24 and 26 at Stampede Pass, Washington Territory, 1887. Timber trestles, mainline, on switchback. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, mountains

Northern Pacific bridges number 27 and 30 at Stampede Pass, Washington Territory, 1887. Timber trestles, three levels of switchback. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, mountains

Northern Pacific construction train at Stampede Pass, Washington Territory, 1887. Decapod-type steam locomotive and flat cars paused on bridge number 18, groups of workers. Photo by I.G. Davidson, J.M. Fredrickson collection. Other Subject Classes: work train, steam locomotive, railroad employee, bridge

Northern Pacific construction train at Stampede Pass, Washington Territory, 1887. Decapod-type steam locomotive and flat cars paused on bridge number 18, groups of workers. Photo by I.G. Davidson, J.M. Fredrickson collection. Other Subject Classes: work train, steam locomotive, railroad employee, bridge

Northern Pacific GP9 and a FB Unit diesel leads scheduled freight number 931 across the high trestle at Wilburton, Washington, just south of Bellevue, on February 11, 1970. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train, trestle bridge.

Northern Pacific 250, a GP9, leads the eastbound Mobase Local over drawbridge 39 on the way to the South Tacoma hill on the 4th subdivision Prairie Line in Tacoma, Washington, on February 10, 1970. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train, trestle bridge.

Northern Pacific 2502, a U25C, leads two sisters, 2505 and 2506 on eastbound freight number 600 across the viaduct at Sandpoint, Idaho, on April 15, 1965. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.