Northern Pacific bridge number 10 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 11 at Stampede Pass, Washington Territory, 1887. Tall timber trestle, mainline. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, track

Northern Pacific bridge number 11 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 13 at Stampede Pass, Washington Territory, 1887. Short trestle, workers. Photo by I.G. Davidson, J.M. Fredrickson collection. Other Subject Classes: bridge, railroad employees

Northern Pacific bridge number 16 at Cabin Creek, Washington Territory, 1887. Trestle over Cabin Creek. Photo by I.G. Davidson, J.M. Fredrickson collection. Other Subject Classes: bridge

Northern Pacific bridge number 16 at Stampede Pass, Washington Territory, 1887. Curved timber trestle on switchback in snow, logged-off mountains. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, mountains

Northern Pacific bridge number 17 at Stampede Pass, Washington Territory, 1887. Low timber trestle on switchback, logged-off mountains. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, mountains

Northern Pacific bridge number 2 at Stampede Pass, Washington Territory, 1887. Curved timber trestle, mainline. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, track

Northern Pacific bridge number 21 at Stampede Pass, Washington Territory, in 1887. Early construction of timber trestle, workers. Photo by I.G. Davidson, J.M. Fredrickson collection. Other Subject Classes: bridge, railroad employee

Northern Pacific bridge number 3 at Stampede Pass, Washington Territory, 1887. Short timber trestle, mainline. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, track