An industrial accident last month at the Hi-Crush mine in Whitehall, Wisconsin is shaping-up to have some potentially significant environmental effects. A contractor’s bulldozer slid into a deep settling basin at the mine in western Wisconsin, leading to an hours-long effort to rescue the man from a 15-foot-deep pond. Rescuers freed the driver after emptying an estimated 10 million gallons of water from the pond into a Trempealeau River tributary. The settling basin contained a large amount of sludge- water, mixed with sand and chemicals. …
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