Cloud Peak Energy Cordero Rojo Mine Recognized for Outstanding Safety Performance in 2016

GILLETTE, Wyo.–(BUSINESS WIRE)–Cloud Peak Energy’s Cordero Rojo Mine, located near Gillette, Wyoming,
was recognized recently for its outstanding safety performance in 2016,
receiving two statewide awards. Cordero Rojo Mine, one of the largest
U.S. coal mines by production, successfully shipped 18.3 million tons in
2016 without incurring a reportable injury at any point during the year.

The Cordero Rojo Mine was awarded the 2016 Safe Sam Award, which is
presented by the Wyoming Mining Association to the mining operation with
the best safety record and the most work-hours across operations of all
sizes. The Cordero Rojo Mine also received the Wyoming Governor’s Safety
Award for the large mine category. This award recognizes safety
excellence among Wyoming’s mine operators, chosen from approximately 350
active operators in the state. The awards were presented at the Wyoming
Mining Association’s Annual Safety and Reclamation Banquet on June 16,
2017, and the Wyoming Safety and Workforce Summit on June 21, 2017.

“One of Cloud Peak Energy’s core values is ensuring the safety of
everyone involved in our business,” said Colin Marshall, Cloud Peak
Energy’s President and CEO. “I want to thank everyone at Cordero Rojo
Mine for their continued commitment to safety, and congratulate them on
this well-deserved award.”

“I am proud of our Cordero Rojo Mine employees and contractors,” said
Kyle Colby, Cordero Rojo Mine General Manager. “Together we have
maintained a safety focus, which has allowed us to receive awards like
these. We will continue to focus on obtaining zero injuries, while
performing our jobs safely and going home to our families at the end of
each and every shift.”

In addition, Cloud Peak Energy’s Antelope Mine, located near Douglas,
Wyoming, received the third place safety award for large surface mines
from the Wyoming State Mine Inspector and the Wyoming Mining Association.

Cloud Peak Energy has a long-standing record of safe and responsible
coal production. Last year, the company had one of the lowest All Injury
Frequency Rates of the top-25 U.S. coal producers, according to the Mine
Safety and Health Administration. Since its inception, Cordero Rojo Mine
has shipped more than one billion tons. The low sulfur coal mined from
Cordero Rojo is primarily shipped to electric utilities in the western,
midwestern and southeastern United States.

About Cloud Peak Energy^®

Cloud Peak Energy Inc. (NYSE:CLD) is headquartered in Wyoming and is one
of the largest U.S. coal producers and the only pure-play Powder River
Basin coal company. As one of the safest coal producers in the nation,
Cloud Peak Energy mines low sulfur, subbituminous coal and provides
logistics supply services. The Company owns and operates three surface
coal mines in the PRB, the lowest cost major coal producing region in
the nation. The Antelope and Cordero Rojo mines are located in Wyoming
and the Spring Creek Mine is located in Montana. In 2016, Cloud Peak
Energy shipped approximately 59 million tons from its three mines to
customers located throughout the U.S. and around the world. Cloud Peak
Energy also owns rights to substantial undeveloped coal and
complimentary surface assets in the Northern PRB, further building the
Company’s long-term position to serve Asian export and domestic
customers. With approximately 1,300 total employees, the Company is
widely recognized for its exemplary performance in its safety and
environmental programs. Cloud Peak Energy is a sustainable fuel supplier
for approximately three percent of the nation’s electricity.

Contacts

Cloud Peak Energy Inc.
Rick Curtsinger, 720-566-2948
Director,
Public Affairs