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. Herman Creek Bridge This is a ninety-foot reinforced concrete viaduct on the Columbia River Highway near Cascade Locks. This structure was built by A. D. Kern in connection with the grading contract on the Cascade Locks section. The cost complete was $7,389.06. Gorton Creek Bridge This is a 50-foot reinforced concrete bridge at Wyeth on the Columbia River Highway. It was built by A. D. Kern under the grading contract for the Cascade Locks Section. The total cost was $3,153.90. Hood River-Mosier Surveys Contemplating construction of the Columbia River Highway between Hood River and Mosier to eliminate the high summit, narrow road bed, and excessive grades between these points the Department made very thorough surveys for this important project. A survey had previously been made developing distance up the Hood River Valley and reaching a summit of 1,107 feet with a corresponding additional length required on the Mosier end, making a total distance of 10.7 miles.