From Deseret News archives:
Utah's largest coal producer cuts mining short
Arch Coal Inc. decided to pull back where a coal seam dips nearly 3,000 feet underground.
The Utah Geological Survey says St. Louis-based Arch Coal is sacrificing 4 million tons of coal at the Dugout mine in Carbon County for safety.
A ton of coal sells for about $26.
Dugout still has plenty of other coal that can be mined. Arch plans to continue longwall mining there until 2015, following by a couple of years of retreat mining, said Michael Vanden Berg of the Utah Geological Survey.
Retreat mining taking down pillars in a controlled collapse can be risky. Federal regulators in a report issued Thursday said the operators of Crandall Canyon cut into load-bearing coal pillars, bringing down a large section of the mine.
The Aug. 6 collapse trapped six miners whose bodies haven't been recovered. Three others were killed during a rescue attempt.
Utah geologists say Arch Coal is taking precautions in longwall mining to avoid mountain "bounces" that plagued Crandall Canyon.
The company wasn't immediately available Friday for comment.
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