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Sand leaks from mining pond into St. Croix river

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outdoors River Falls, 54022

River Falls Wisconsin 2815 Prairie Drive / P.O. Box 25 54022

The Wisconsin DNR says it's too early to know how much environmental damage was done by a spill at a sand-mining facility. An unknown quantity of sand and other sediment made its way to the St. Croix River and wetlands located near the Wisconsin border with Minnesota.

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Conservation officials were notified about the problem last month when a hiker reported seeing cream-colored water in a creek which flows into the St. Croix. The tainted water was traced back to the sand mining facility owned by Tiller Corporation. There was a leak in a holding pond.

The sand is being mined for use by the petroleum industry as a part of the process to extract natural gas and oil supplies in a controversial approach called hydraulic fracturing.

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