The largest concrete bridge so far designed and constructed by the State
Highway Department is that spanning Hood River near the city of Hood
River. It consists of three arch spans 95 feet, center to center of
piers, 110 feet of reinforced concrete approach on the Hood River side
and a short approach on the opposite side.
As in other arch work of similar magnitude studied by the Department, it
was found economical to support the arch superstructures on ribs instead
of using rings extending clear across the roadway, and the open spandrel
idea was carried out.
The concrete viaduct approach on the west side crosses three railroad
tracks which govern the height of the bridge. In order to minimize this
height through concrete girders were used, the girders projecting above
rather than below the roadway slab.
The total cost of the structure complete will be about $48,000.00, of
which Hood River County will contribute $8,000.00. The bridge was built
under contract by Parker & Banfield. Mr. C. E. Carter was resident
engineer on the work.