This report is the ninth in a series by the U.S. Geological Survey in cooperation with the Utah Department of Natural Resources, Division of Water Rights, which describes the water resources of the western basins of Utah (see fig. 1). Its purpose is to present available hydrologic data for Hansel Valley, to provide an evaluation of the potential water-resource development of the valley, and to identify needed studies that would improve understanding of the valley's water supply. Hydrologic data from the northern part of adjacent Rozel Flat were collected to aid in evaluation of southern Hansel Valley, and these data also are included in this report.