In the 1860s, when the first photographers arrived, the Columbia River Gorge still looked much the same as it had when Lewis and Clark made their way down the river in 1805. In the mid-twentieth century, the character of the river was fundamentally altered by the construction of hydroelectric dams. Terry Toedtemeier and John Laursen have selected more than 130 imagesamost of them previously unpublished and many of them never before available for public viewaby some three dozen photographers to chronicle the history of photography in the Gorge.