frac sand mining

$Anti-frac mining activists waved signs at a press conference Feb. 19.$

Local officials ask the state for help regulating frac-sand mining

By TW Budig on February 27, 2013 at 8:49 am

Wary residents of southern Minnesota and mining industry officials painted contrasting pictures Feb. 19 of silica or frac sand found …

Earth Day event to address frac sand mining

By The Post Review on April 18, 2012 at 1:51 pm

Frac sand mining in the St. Croix Valley is the topic for the Sunday, May 6, 2012 Earth Day Conference …