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THE POWELL SURVEY, 1869-1873 The first recorded exploration of the Colorado River through Glen Canyon was accomplished by John Wesley Powell during the course of his two voyages of discovery in 1869 and 1871. On the 1869 trip Powell applied the name Mound Canyon to the length of canyon stretching from the mouth of the Dirty Devil to the mouth of the San Juan, and the name Monument Canyon to the length extending from the San Juan to the mouth of the Paria River or Lee's Ferry. These names were also employed on the second expedition in 1871, but sometime during this voyage, possibly at Music Temple (Historical site 32), Powell decided upon the name Glen Canyon as one name for the two canyons and this is the way it appears on the first map of his survey completed February 1, 1873. Powell's two exploring expeditions spent little time in Glen Canyon but the members of the parties wrote a lot about it and most of this has now been published. In fact, the Powell survey is the best documented chapter in the earlier history of Glen Canyon. The personal accounts of the men involved together with the scientific papers emerging from it contain much first hand information about the character of the canyon, its geography and geology, the plant and animal life, the aboriginal peoples and its earliest history. Powell left many names on the land his survey was the first to describe. Most of these, applied during the river trips, were in the lower part of Glen Canyon. In addition to the primary literature which has grown out of the survey, there is an increasing body of secondary works about it, all of which makes it unnecessary to summarize its work here beyond reference to places coming within the area of the Glen Canyon reservoir, now to be called Lake Powell. Historical site 32-Music Temple This is a spectacular grotto-like chamber nearly arched over by the high vaulting walls near the mouth of a short narrow canyon heading on the extreme northwestern toe of Navajo Mountain (Fig. 16). A waterfall, normally dry, is some 45 ft. above a pool of water on the floor of the chamber which is shaded and cool on the warmest day. Music Temple, about three-eights of a mile from the Colorado River, is reached by walking up the wash which extends across a wide sandy terrace and enters the river at mile 75. 75. The wash is normally dry until one reaches the mouth of Music Temple where water from seeps is usually found. 57Epson Perfection 4870 Photo, 400 dpi, 8 bit, 13,654,016 byte