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At the fracking site in Pennsylvania, DOE scientists also discovered that one hydraulic fracture traveled 1,800 feet from the well bored. Most of the other fractures traveled just a few hundred feet. Although the 8,000-foot Pennsylvania well was deep enough to prevent the 1,800-foot fracture from having an impact on groundwater, that might not be the case with other, more shallow wells. The individual fracture was longer than the entire depth of Pavillion芒聙聶s well, where drilling occurs at 1,200 feet. Scientists were unable to predict that fracture, and it remains unclear if they can be prevented.脗聽
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