FLAT LICK, Ky. (AP) -- A federal report is blaming a spill of hydraulic fracturing fluids for harming a fish population in a small stream in southeastern Kentucky.
The study by the U.S. Geological Survey and the Fish and Wildlife Service says the liquids are believed to be the cause of a die-off of Blackside dace that lived in the Acorn Fork, a small creek in Knox County. The small minnow-like fish is considered at risk by federal officials due of a loss of habitat.
The spill occurred in 2007, and officials collected samples shortly after.
Hydraulic fracturing, commonly known as fracking, is a method used to extract underground natural gas using high-pressure injections of fluid.
The report was published in the scientific journal Southeastern Naturalist, in a special edition devoted to the Blackside dace.