NYSE: CDE JC 2016 Board of Directors Robert E. Mellor – Former Chairman, Chief Executive Officer, and President of Building Materials Holding Corporation (distribution, manufacturing, and sales of building materials and component products) from 1997 to January 2010, director from 1991 to January 2010; member of the board of directors of Monro Muffler/Brake, Inc. (auto service provider) since August 2010 as independent Chairman of the board of directors since June 2017 and as lead independent director from April 2011 to June 2017; member of the board of directors of CalAtlantic Group, Inc. (national residential home builder) from October 2015 to February 2018, when CalAtlantic was acquired by Lennar Corporation; member of the board of directors of The Ryland Group, Inc. (national home builder, merged with another builder to form CalAtlantic) from 1999 until October 2015; and former member of the board of directors of Stock Building Supply Holdings, Inc. (lumber and building materials distributor) from March 2010 until December 2015, when it merged with another company.Mitchell J. Krebs – President and Chief Executive Officer. (See prior slide)Linda L. Adamany – Member of the board of directors of Leucadia National Corporation, a diversified holding company engaged in a variety of businesses, since March 2014; non-executive director of Wood plc, a company that provides project, engineering and technical services to energy and industrial markets, since October 2017; non-executive director of Amec Foster Wheeler plc from October 2012 until October 2017, when Amec Foster Wheeler was acquired by Wood group plc; non-executive director of BlackRock Institutional Trust Company since March 2018; member of the board of directors of National Grid plc, an electricity and gas generation, transmission, and distribution company, from November 2006 to November 2012; . Served at BP plc in several capacities from July 1980 until her retirement in August 2007, most recently from April 2005 to August 2007 as a member of the five-person Refining & Marketing Executive Committee responsible for overseeing the day-to-day operations and human resource management of BP plc's Refining & Marketing segment, a $45 billion business at the time.Kevin S. Crutchfield – Chief Executive Officer and member of the board of directors of Contura Energy, Inc. (coal industry) since July 2016; formerly, Chairman and Chief Executive Officer of Alpha Natural Resources, Inc. He was with Alpha Natural Resources since its formation in 2003, serving as Executive Vice-President, President, Director, and Chief Executive Officer. Mr. Crutchfield is a 30-year coal industry veteran with technical, operating, and executive management experience and recently served as the Chairman of the National Mining Association and the American Coalition for Clean Coal Electricity.Sebastian Edwards – Henry Ford II Professor of International Business Economics at the Anderson Graduate School of Management at the University of California, Los Angeles (UCLA) from 1996 to present; Chairman of the Inter American Seminar on Economics from 1987 to present; member of the Scientific Advisory Council of the Kiel Institute of World Economics in Germany from 2002 to present; and research associate at the National Bureau of Economic Research from 1981 to present.Randolph E. Gress – Retired Chairman and Chief Executive Officer of Innophos Holdings, Inc., a leading international producer of performance-critical and nutritional specialty ingredients for the food, beverage, dietary supplements, pharmaceutical, and industrial end markets. Mr. Gress was with Innophos since its formation in 2004, when Bain Capital purchased Rhodia SA's North American specialty phosphate business. Prior to his time at Innophos, Mr. Gress was with Rhodia since 1997 and held various positions including Global President of Specialty Phosphates (with two years based in the U.K.) and Vice-President and General Manager of the NA Sulfuric Acid and Regeneration businesses. From 1982 to 1997, Mr. Gress served in various roles at FMC Corporation including Corporate Strategy and various manufacturing, marketing, and supply chain positions.Eduardo Luna – Chairman of the Board of Rochester Resources Ltd., a junior natural resources company with assets in Mexico. Member of the Boards of Directors of Wheaton Precious Metals Corp. and DynaResource, Inc., Chairman of the Advisory Board of the Faculty of Mines at the University of Guanajuato, and Mexico Mining Hall of Fame inductee. Mr. Luna is the former President of the Mexican Mining Chamber and a former President of the Silver Institute and previously held senior executive and board positions at several companies including Industrial Peñoles, Goldcorp Inc., Luismin SA de CV, Wheaton River Minerals Ltd., Alamos Gold Inc., and Primero Mining CorpJessica L. McDonald – Chair of Canada Post Corporation and interim President and CEO, effective April 2018, until a successor to the former CEO is named, and a member of the Board of Directors of Trevali Mining Corporation. Ms. McDonald is also a Mentor at the Trudeau Foundation and a visiting fellow at the Steyer-Taylor Center for Energy Policy and Finance at Stanford University and was named to Canada’s Top 100 Most Powerful Women Hall of Fame. Ms. McDonald previously served as the President and Chief Executive Officer of BC Hydro and Power Authority, a clean energy utility with over $5.5 billion in annual revenues and more than 5,000 employees, and has held numerous senior positions in the British Columbia provincial government, including Deputy Minister to the Premier, Cabinet Secretary and Head of the BC Public Service.John H. Robinson – Chairman of Hamilton Ventures LLC (consulting and investment) since founding the firm in 2006; Chief Executive Officer of Nowa Technology, Inc. (development and marketing of environmentally sustainable wastewater treatment technology) from 2013 to 2014; Chairman of EPC Global, Ltd. (engineering staffing company) from 2003 to 2004; Executive Director of Amey plc (British business process outsourcing company) from 2000 to 2002; Vice Chairman of Black & Veatch Inc. (engineering and construction) from 1998 to 2000. Mr. Robinson began his career at Black & Veatch and was managing partner prior to becoming Vice Chairman. Member of the board of directors of Alliance Resource Management GP, LLC (coal mining); Federal Home Loan Bank of Des Moines (financial services) and Olsson Associates (engineering consulting).J. Kenneth Thompson – Member of the board of directors of Alaska Air Group, Inc. (parent company of Alaska Airlines, Virgin America Airlines and Horizon Air), Pioneer Natural Resources Company (oil and gas), and Tera Tech, Inc. (engineering consulting). President and Chief Executive Officer of Pacific Star Energy LLC (private energy investment firm in Alaska) from September 2000 to present, with a principal holding in Alaska Venture Capital Group LLC (private oil and gas exploration company) from December 2004 to present; Executive Vice President of ARCO’s Asia Pacific oil and gas operating companies in Alaska, California, Indonesia, China, and Singapore from 1998 to 2000. *