%0 Generic %D %T Active mines and mineral plants in the US %K #MapsDataPublications %K #MineralResources %K active %K collecting %K dimension stone %K economic geology %K gold %K lead %K minerals %K mines %K quarries %K sand and gravel %K sand pits %K silver %X Mine plants and operations for commodities monitored by the National Minerals Information Center of the USGS. Operations included are those considered active in 2003 and surveyed by the USGS. %I USGS %G eng %U http://tin.er.usgs.gov/mineplant/