Northern Pacific footbridge at Martin, Washington, in 1945. Wood bridge buckling under heavy snow. Photo by J.M. Fredrickson . Other Subject Classes: bridge

Northern Pacific mainline at Stampede Pass, Washington Territory, circa 1887. Three levels of track on switchback, timber trestles, logged hillside. J.M. Fredrickson collection. Other Subject Classes: track, switchback, bridge, mountains

Northern Pacific steam locomotive 1361 at Bellingham, Washington with train on waterfront trestle. Other subject categories: Locomotive-Steam, Train-Freight, S-4, Bridge-Trestle

Northern Pacific 1612 hauls the eastbound (south) Darrington Logger across the Stillaguamish River bridge at Arlington, Washington, on May 25, 1955. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, truss bridge.

Northern Pacific 1800 leads the eastbound Mobase Local over drawbridge 39 in Tacoma, Washington, in 1953. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, trestle bridge.

Northern Pacific 4025, a class Z-3, leads an eastbound extra freight across the high bridge at Dorsey, Idaho, east of Wallace, on May 28, 1952. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, trestle bridge.

Northern Pacific steam locomotive at Stampede Pass, Washington Territory, 1887. Decapod-type steam locomotive on construction train, box and flat cars, workers, on bridge number 15. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: steam locomotive, work train, freight car, railroad employee, bridge

A Northern Pacific freight train on a bridge on the South Bend Branch, Washington. Photo by JM Fredrickson, J.M. Fredrickson collection. Other Subject Classes: freight train.