Edward W. Wolfe, Ph.D., is a retired geologist who spent his career with the U.S. Geological Survey. Over nearly 40 years, he worked with the USGS in western Kentucky, northern California, northern Arizona, Hawaii, the Pacific Northwest, the Philippines, and the Moon (from a distance, during the Apollo Program). Much of the work was related to areas of young volcanic rocks and to active volcanoes— especially Kilauea, Pinatubo, and Mount St. Helens. He retired to the Prescott area, Arizona, and recognized that his geologic experience in northern Arizona could have application in interpreting and explaining the area’s severe water-resource issues. Over the past decade, both singly and with retired USGS groundwater hydrologist William Meyer, he has written numerous articles and has given many presentations on the groundwater issues, particularly with respect to the upper Verde River watershed and the Verde River. Wolfe was a founding member of the Citizens Water Advocacy Group’s Board of Directors, the former chairman of the Verde Watershed Association, former chairman of the Verde River Basin Partnership’s Technical Advisory Group, and former chairman of the Partnership’s Board of Directors.