Powell, John Wesley (1834–1902) One of American's great explorers, J. W. Powell planned and led the first boat expedition through the Grand Canyon of the Colorado River. The exploration party consisted of ten men, and their means of transport was four small rowing boats. The boats were launched in the Green River, a tributary of the Colorado, in south-west Wyoming on 24 May 1869, and the expedition emerged from the mouth of the Grand Canyon three months later, on 29 August. On this trip, Powell made the first important geological observations of the geology of the canyon, and demonstrated that it originated by river erosion into rocks that had been slowly elevated.
As a result of his several geological expeditions to the Rocky Mountains, Powell became interested in, and made a special study of, the native peoples of the area and their languages. In order to curate his work with the native peoples, he founded and directed the Bureau of Ethnology within the Smithsonian Institution. Between 1874 and 1879, Powell directed the United States Geological and Geographical Survey of the Territories, jointly carrying out both geological and enthnological field studies in Utah, Nevada, California, New Mexico, and Arizona. During this period, realizing that access to water imposed a limit on development of the western states, he made the first extensive studies of the water supplies available in the arid south-west of the United States. In 1879, the United States Geographical and Geological Survey was incorporated into the United States Geological Survey under the directorship of Clarence King. When King resigned his directorship in 1881, Powell was appointed his successor, carrying out the tasks associated with the directorships of both the Ethnological Bureau and the Geological Survey. He administered both offices until 1894, when he resigned the office of Director of the U.S. Geological Survey in order to devote more time to ethnological studies.
Brian J. Skinner