Northern Pacific bridge 61.1 at Arlington, Washington. Looking northeast at bridge 61.1 over Stillaguamish River; Washington State Highway 9 to the left; photograph sequence TRWahl0213, 0247-0249. Other subject categories: Bridge-Truss, River, Structure

Northern Pacific bridge 61.1 at Arlington, Washington. Close-up of pier of bridge 61.1 over Stillaguamish River; photograph sequence TRWahl0213, 0247-0249. Other subject categories: Bridge-Plate Girder, pier, Structure

Northern Pacific bridge 61.1 at Arlington, Washington looking northwest over Stillaguamish River; Washington State Highway 9 to the left. Other subject categories: Bridge-Truss, Highway, Highway, Structure

Northern Pacific bridge 61.1 at Arlington, Washington. Close-up of pier of bridge 61.1 over Stillaguamish River; photograph sequence TRWahl0213, 0247-0249. Other subject categories: Bridge-Truss, pier, Structure

Northern Pacific bridge 61.1 at Arlington, Washington. Looking northeast at bridge 61.1 over Stillaguamish River; Washington State Highway 9 to the left; photograph sequence TRWahl0213, 0247-0249. Other subject categories: Bridge-Truss, Right-of-Way, Structure

Northern Pacific 5407, an Electro-Motive Division FT, hauls scheduled freight number 675 across the Stillaguamish River bridge north (railroad west) of Arlington, Washington, in 1955. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train, truss bridge.

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.