Oregon has more than 200 historic bridges eligible for the National Register of Historic Places. Many of these are concentrated on the Oregon Coast Highway. The Oregon Department of Transportation (ODOT) recognized as far back as the 1970s that a significant number of its historic structures were deteriorating in ways conventional maintenance could not control. The spectacular beauty of the coastal bridges, designed primarily by Conde B. McCullough, state bridge engineer from 1919 to 1935, and the fear they would be lost to deterioration, compelled ODOT to make fundamental changes in its approach to historic bridge preservation. Text by Rosalind Keeney, Frank Nelson, and Robert Hadlow;photographs by James Norman and Orrin Russie; design by Chittirat [Gail] Amawattana KML by Ron Hall.