Arch Coal’s Canyon Fuel Co. subsidiary announced its Dugout Canyon mine in Carbon County, Utah, has resumed coal production with all mining equipment, including the main longwall mining system. Mine crews recently completed permanently sealing a mined-out area where increased levels of carbon monoxide were detected on April 29. Dugout Canyon mine produced approximately 200,000 tons of low-sulfur bituminous coal per month in the first quarter of 2010.