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 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 bridge 19 at Bellingham, Washington. bridge 19 over Whatcom Creek on main track near Albers Feeds. Other subject categories: Bridge-Trestle, , Structure

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 number 9 at Stampede Pass, Washington Territory, 1887. Low timber trestle on switchback in snow. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback

Northern Pacific bridge number 8 at Stampede Pass, Washington Territory, 1887. Timber trestle, mainline. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, track

Northern Pacific bridge number 8 at Stampede Pass, Washington Territory, 1887. Low timber trestle on switchback in snow. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, mountains

Northern Pacific bridge number 5 at Stampede Pass, Washington Territory, in 1887. Long timber trestle on switchback, two men walking on track, in snow. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback

Northern Pacific bridge number 5 at Stampede Pass, Washington Territory, 1887. Timber trestle, mainline. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, track

Northern Pacific bridge number 40 over Yakima River, Washington Territory, in 1887. Short timber trestle, mainline. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: trestle bridge,