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 15 at Cabin Creek, Washington Territory, 1887. Trestle and truss span, construction train of flat cars with Decapod-type steam locomotive, workers, construction camp. Photo by J.M. Fredrickson collection.. Other Subject Classes: bridge, work train, steam locomotive, freight car, railroad employee, construction camp

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

Northern Pacific bridge number 32 at Stampede Pass, Washington Territory, 1887. Timber trestle on switchback, horse-drawn construction wagon in distance. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, wagon