Harvey (history, North Dakota State, Fargo) details the first major clash between conservationists and developers after World War II. Echo Park Dam, planned for the Green River to generate power and create a recreational lake, would have flooded the Echo Park Valley and, argued its detractors, threatened Dinosaur National Monument on the Utah-Colorado border. Harvey's study may be seen as part of the history of dams and that history's conjunction with the history and politics of environmentalism. This is a reprint (with a new foreword) of a University of New Mexico Press work published in 1994. Annotation c. Book News, Inc., Portland, OR (booknews.com)