1 p. article describing the building of the Columbia River Highway, including construction details. The article also contains four photographs: one depicting the bridge at Shepperd's Dell, one depicting the entrance to the observatory tunnel, one depicting Mitchell's Tunnel through Storm Cliff; one showing the overlook at Crown Point on the Columbia River.
Number of Pages
A Beautiful link in our highway system. Scientific American v. 114 (June 17 1916) p. 633.