This is a concrete arch that was built in 1909. As such, it is an early surviving concrete arch bridge in Washington State that is further noted for its lack of alteration. The sidewalk is cantilevered out from the arches, and contains an unusual railing that has concrete posts and metal railing panels. Metal railings are somewhat uncommon to see on a concrete arch bridge. They are however original as shown in historical photos. The only alteration was the addition of a metal pipe to the top of the railings.
The construction of this bridge was extensively photographed, so in addition to the full collection of present-day photos by HistoricBridges.org in the photo gallery, some of the historical construction photos are shown and described below. Compared to modern bridge construction, these photos effectively convey the vastly different construction methods used to build concrete arch bridges.
This photo shows initial construction with the previous bridge, which was a wooden through truss bridge visible.
The above photos show the initial construction of the bridge, with equipment used to facilitate construction being assembled and some initial falsework being erected.
The above photo shows the first of the wooden centering (which is the falsework used to erect arch bridges) being erected.
These two photos show the arch centering mostly completed.
Here, concrete is being (or has been) poured on the centering to form the arches.
Here, the bridge is nearly complete. The earth fill is visible in the vehicular roadway. The concrete deck has yet to be poured.
This photo shows the bridge newly completed.
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