Shepperd's Dell, Columbia River Highway, Oregon. Caption on the back reads Shepperds Dell, Bridge and Domes. This picture shows the east approach to Shepperds Dell, and gives an idea of the wonderful construction of the road. It is now paved with bitulithic, a distance of 47 miles. There is one mile of reinforced concrete bridges and viaducts, three miles of dry masonry walls, four miles of concrete gutters and six miles of concrete fencing. There are seventeen bridges similar to the one shown in this picture.