Locations of active mines producing copper in the United States as of 2003.  This includes mines primarily producing other commodities which also produce limited amounts of copper.  The source data is for all 50 states; Alaska and Hawaii produced no copper in 2003 according to the dataset used, so they are omitted from this map for ease of projection and scaling.
The map employs a polyconic projection centered on meridian 100° west longitude.
Own work based on data from the USGS [1]:Originator: U.S. Geological SurveyPublication_Date: 2005Title: Active Mines and Mineral Processing Plants in the United States in 2003Geospatial_Data_Presentation_Form: vector digital dataPublication_Information:Publication_Place: Reston, VirginiaPublisher: U.S. Geological SurveyOnline_Linkage: http://mrdata.usgs.gov/
Kbh3rd