Leader-Telegram -- "A new industry continues to rise — quite literally — from the ground in west-central Wisconsin. Officials from 12 regional counties reported the area now has a total of 52 silica sand mines that are either operating or approved (see map above).That's up 136 percent from 22 just a year ago and shows just how fast the sand storm is sweeping across west-central Wisconsin, which is home to plentiful deposits of a variety of sand prized in the rapidly growing energy extraction practice known as hydraulic fracturing, or "fracking." While some experts have been predicting a slowdown in the industry's dramatic rise from virtually nonexistent four years ago, county planners who deal with permits for the mines haven't noticed such a change."It's still a boom," said Kevin Lien,
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