Arch Coal's Dugout Canyon Awarded Sentinels of Safety as Safest Large-Scale Underground Mine in United States

 Arch Coal's Dugout Canyon Awarded Sentinels of Safety as Safest Large-Scale
                      Underground Mine in United States

PR Newswire

LAS VEGAS, Sept. 25, 2012

LAS VEGAS, Sept. 25, 2012 /PRNewswire/ -- Arch Coal, Inc. (NYSE:ACI) today
announced that its Canyon Fuel Company's Dugout Canyon mine earned the
Sentinels of Safety award for achieving the nation's best 2011 safety record
among large underground coal mines.

(Logo: http://photos.prnewswire.com/prnh/20120727/CG47668LOGO)

"Our Dugout Canyon employees earned this top national recognition for
achieving a perfect safety record in 2011," said Arch's President and CEO John
W. Eaves. "A total incident rate of zero is an elite accomplishment, to say
the least. We're very proud of Dugout employees' safety excellence."

In 2011, Dugout Canyon employees worked 449,797 hours with a lost-time
incident rate of zero, compared to the national average of 2.44 incidents per
200,000 employee-hours. Dugout Canyon mine has operated since May 2010
without a reportable safety incident. Earlier this year, the Dugout Canyon
mine was named 2011 Safe Operator of the Year among underground coal mines by
the Utah State Labor Commission and Office of Coal Mine Safety, and received a
regional RMCMI 2012 Safety Award.

The Sentinels of Safety awards program is sponsored by the National Mining
Association. Sentinels of Safety award recipients represent mining operations
that have worked the most employee hours in each category without a lost-time
incident. Six award winners are chosen from large and small operations in
three category types, with a minimum of 4,000 hours logged without a lost-time
incident.

Sentinels of Safety awards were initiated in 1925 by then-Commerce Secretary
Herbert Hoover and remain the nation's most prestigious awards for recognizing
safety in coal, metal and nonmetal mines. More information on the Sentinels
of Safety awards and categories is posted at www.nma.org.

In 2011, Arch continued to lead the U.S. coal industry in safety performance
and environmental compliance among large, diversified producers. Arch
subsidiary operations have earned a total of six Sentinels of Safety awards
since 2002.

U.S.-based Arch Coal, Inc. is a top five global coal producer and marketer,
with 157 million tons of coal sold in 2011. Arch is the most diversified
American coal company, with active mining complexes across every major U.S.
coal supply basin. Its core business is supplying cleaner-burning, low-sulfur
thermal and metallurgical coal to power generators and steel manufacturers on
five continents. Arch's Canyon Fuel Company is Utah's largest coal producer
and a large state employer, with a workforce of more than 700. It operates
the Dugout Canyon, Skyline and Sufco mines.

SOURCE Arch Coal, Inc.

Website: http://www.archcoal.com
Contact: Kim Link, +1-314-994-2936
 
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