The Arizona Geological Survey (AZGS) has a new website for mining data. This is a culmination of consolidation of the now defunct Arizona Department of Mines and Mineral Resources (ADMMR) with the AZGS.
Over the past several years, AZGS has performed a comprehensive inventory of the 30 archival collections, creating finding aids for the more than 10,000 folders, 6,000 maps, and 7,000 photographs.
Visit the new Mining Collections site here: http://minedata.azgs.az.gov/content/mining-collections
This is a great resource for anyone interested in mining history of Arizona and for land use planners.