GRAND JUNCTION, Colo. (AP) - A federal facility that pumps salty water 14,000 feet into the Earth's crust probably is associated with a magnitude 3.9 earthquake that struck the Utah-Colorado border this month, an official said.
The U.S. Bureau of Reclamation facility removes salt from the Dolores River, then pumps 230 gallons of brine per minute into deep wells in Utah's Paradox Valley Area.
The process is intended to decrease the salt content of the Colorado River downstream, but scientists say it also lubricates faults.
The facility has caused thousands of earthquakes in the area since 1991, but most have been too small for people to feel. The 3.9 quake, which struck Nov. 6, was felt in Grand Junction, some 60 miles away. No damage was reported.
http://apnews1.iwon.com/article/20041115/D86CC6QG1.html-----------------------------------
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