This report details geothermal resource exploration done for Arizona Public Service and the U.S. Department of Energy. Arizona Public Services (APS) of Phoenix, Arizona, retained David Brown & Associates (DBA) in 2005 to evaluate the geothermal resources of the Clifton Hot Springs area in Greenlee County, eastern Arizona for electric power production. Project Management was provided by T2 & Associates of Sacramento, California. The intent of the evaluation was to determine the local geologic controls of the geothermal system and, using publicly available data and original mapping performed for this project, to recommend locations for Controlled Source Audiomagnetotelluric (CSAMT) cross sections. The results of the geophysics were then combined with the geologic mapping to site three gradient holes, two of which were drilled to depths of 635 feet and 1,000 feet, respectively. This work was done with funding from the US Department of Energy under their Geothermal Resource Exploration and Development III (GRED III) program and co-funding from APS. Grant number was DE-FC36- 04GO14346.