Records pertaining to Citizens Against Silica Mining (CASM), a Winona, Minnesota, based group that were concerned with/opposed to frac-sand mining in southeastern Minnesota and southwestern Wisconsin, including Trempealeau and Buffalo Counties. CASM was started by anti-frac sand mining activist Jim Gurley and his wife. Contains newspaper articles from 2012-2017 related to CASM and frac-sand mining in Minnesota and Wisconsin.