Northern Pacific bridge number 4 at Stampede Pass, Washington Territory, 1887. Short timber trestle, mainline. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, track

Northern Pacific bridge number 4 at Stampede Pass, Washington Territory, 1887. Short timber trestle, mainline. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, track

Northern Pacific bridge number 4 at Stampede Pass, Washington Territory, 1887. Long curved trestle on switchback, workers. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, railroad employee

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 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 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 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