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 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

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 at Teanaway, Washington Territory, circa 1886. Timber bridge and mainline over dam, horse and wagon. Photo by I.G. Davidson, J.M. Fredrickson collection. Other Subject Classes: bridge, track, wagon

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Large timber trestle at Station 253 on switchback, track inspector on velocipede. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, railroad employee, velocipede, mountains

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