Arch Coal Earns 10 State Safety, Environmental Awards for Operational Excellence in West Virginia and Colorado

    Arch Coal Earns 10 State Safety, Environmental Awards for Operational
                   Excellence in West Virginia and Colorado

PR Newswire

ST. LOUIS, March 12, 2013

ST. LOUIS, March 12, 2013 /PRNewswire/ -- Arch Coal, Inc. (NYSE:ACI) today
announced that employees in Colorado and West Virginia recently earned a total
of 10 statewide safety and environmental awards, including Colorado's top coal
mine safety award.


"Safety and responsibility are deep-rooted values at Arch, and these external
recognitions highlight our employees' dedication and leadership," said John W.
Eaves, Arch's president and chief executive officer. "Thanks to the hard work
of our employees, Arch has led our major, diversified peers in safety for
seven consecutive years."

On March 7 and 8, Arch Coal's Appalachian operations earned eight prestigious
safety and environmental awards in West Virginia.

  oArch operations and facilities garnered five West Virginia Mountaineer
    Guardian Awards for exemplary safety records achieved during calendar year
    2012: Mingo Logan's Mountain Laurel Mountaineer II mine and Cardinal
    preparation plant; Coal-Mac's Holden 22 mine and preparation plant; and
    Wolf Run's Sentinel preparation plant.
  oThree of Arch's operations received environmental awards from the West
    Virginia Department of Environmental Protection. Coal-Mac earned the
    National Wild Turkey Federation award for developing wildlife habitat and
    sponsoring a guided hunt in 2012; Wolf Run earned an award for innovative
    reclamation of its Reed Hollow refuse area through the use of short paper
    fiber; and Mountain Laurel earned statewide praise for developing an
    automated water treatment system within its Monclo permit area.

On Feb. 26 and 27, Mountain Coal Company's West Elk mine in Colorado earned
two state awards for safety and environmental excellence.

  oThe Colorado Division of Reclamation, Mining and Safety presented the 2012
    Excellence in Safety Award on Feb. 27 to West Elk mine, the state's leader
    in safety among large underground coal mines. This marks the fourth
    consecutive year that West Elk has been recognized as Colorado's safest
    underground coal mine. West Elk's 350 employees have worked more than
    580,000 employee-hours and produced 4.9 million tons of low-sulfur coal
    without incurring a single reportable injury, as classified by the U.S.
    Mine Safety and Health Administration.
  oWest Elk was honored on Feb. 26 by the Colorado Department of Public
    Health & Environment (CDPHE) as a Senior Participant with Special
    Recognition for Environmental Stewardship and Pollution Prevention. The
    award recognized the mine's exemplary community outreach efforts. The
    mine donated nearly 1,000 air monitoring tubes for local university
    education and training, provided used conveyor belting for fairgrounds'
    walkways and livestock pens and donated soda lime to reduce E. coli
    bacteria in livestock sheds. West Elk also was praised for investing more
    than $2.2 million to drain, reclaim and establish sediment control on an
    area adjacent to the mine facility. West Elk has operated for more than
    13 years with perfect SMCRA environmental compliance.

U.S.-based Arch Coal, Inc. is one of the world's top coal producers for the
global steel and power generation industries, serving customers in 25
countries on five continents. Its network of mining complexes is the most
diversified in the United States, spanning every major coal basin in the
nation. The company controls a 5.5-billion-ton reserve base of high-quality
metallurgical and thermal coals, with access to all major railroads, inland
waterways and a growing number of seaborne trade channels. Mingo Logan Coal
Company, Wolf Run Mining Company, Coal-Mac, Inc. and Mountain Coal Company,
L.L.C. are subsidiaries of Arch Coal, Inc.

Forward-Looking Statements: This press release contains "forward-looking
statements" — that is, statements related to future, not past, events. In
this context, forward-looking statements often address our expected future
business and financial performance, and often contain words such as "expects,"
"anticipates," "intends," "plans," "believes," "seeks," or "will."
Forward-looking statements by their nature address matters that are, to
different degrees, uncertain. For us, particular uncertainties arise from
changes in the demand for our coal by the domestic electric generation
industry; from legislation and regulations relating to the Clean Air Act and
other environmental initiatives; from operational, geological, permit, labor
and weather-related factors; from fluctuations in the amount of cash we
generate from operations; from future integration of acquired businesses; and
from numerous other matters of national, regional and global scale, including
those of a political, economic, business, competitive or regulatory nature.
These uncertainties may cause our actual future results to be materially
different than those expressed in our forward-looking statements. We do not
undertake to update our forward-looking statements, whether as a result of new
information, future events or otherwise, except as may be required by law.
For a description of some of the risks and uncertainties that may affect our
future results, you should see the risk factors described from time to time in
the reports we file with the Securities and Exchange Commission.

SOURCE Arch Coal, Inc.

Contact: Kim Link, +1-314-994-2936
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