Reconstructing the 1935 Columbia River Gorge: A Topographic and Orthophoto Experiment

Mark A Fonstad1, James H Major1, Jim E O'Connor2 and James T. Dietrich, Ph.D.3, (1)University of Oregon, Eugene, OR, United States, (2)U.S. Geological Survey, Portland, United States, (3)University of Northern Iowa, Cedar Falls, United States