Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 379 on switchback, logged-off hillside. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, mountains

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Curved timber trestle at Station 70 on switchback. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 85 on switchback. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, mountains

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 400 on switchback, logged-off hillside. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, mountains

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 100 on switchback. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 112 on switchback. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 140 on switchback, workers. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, railroad employee

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 224 on switchback, telegraph pole. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, telegraph equipment

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 231 on switchback, flat cars loaded with rock. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, freight car

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