For the purpose of this directory, an active mine is defined as a mine in continuous operation, either in production or under full-time development for production. It is acknowledged that there are additional mines not listed that are in an exploration, evaluation, or part-time development phase. There are others where production is intermittent that are not listed. The authors compiled this directory during late 2006 thru mid 2007 by directly contacting the producers. Lists of possible producers were compiled from data of the department, MSHA, Arizona State Mine Inspector, U.S. Bureau of Land Management, U.S. Geological Survey among others. Also included here: Arizona Mines Map 2007 (pdf) and a Google Earth KML file containing the names and locations of active mines in Arizona ca. 2007. The latter requires Google Earth application to launch.