Director Qualifications and Experience:

Ms. Boudreaux's experience in the health care insurance industry brings strong leadership skills, business acumen, and a consumer focus to the Board. Both her background in finance and her experience serving on public company audit committees provide valuable expertise that has been put to use through her service on our Audit Committee when she was first elected to the Board. With her extensive career in the healthcare industry, Ms. Boudreaux provides the Company experience in management, risk management, and governance issues relevant to our highly regulated industry, as well as a commitment to excellent customer service in a dynamic and changing business. She is the chair of our ONES Committee and serves on our GCN Committee.

Business Experience:

• CEO and Founder, GKB Global Health, LLC, a health care strategy and advisory firm (June 2015 to present)
• Senior Fellow of the Healthcare Initiative, Tuck School of Business, Dartmouth College (September 2015 to present)
• CEO, UnitedHealthcare, a diversified health insurance and well-being company (2011 to November 2014); President, UnitedHealthcare (2008 to January 2011)
• Executive Vice President, UnitedHealth Group, health, well-being and health insurance (2008 to February 2015)
• Executive VP, External Operations, Healthcare Services Corporation, health care and health insurance (2005 to 2008)

Committees:

• Governance, Compensation and Nominating Committee (GCN)
• Operations, Nuclear, Environmental and Safety Committee (ONES) (Chair)

Director Qualifications and Experience:

Mr. Davis' executive experience in the highly regulated banking industry provides the Board with valuable leadership skills, strategic insight, and commercial acumen. His extensive financial expertise is valuable in our capital-intensive industry and his background in delivering strong results for a complex financial institution brings valuable skills to the Board. Mr. Davis also serves as a director of several nonprofit and educational institutions in the communities that we serve, bringing an enhanced awareness of our stakeholder base that is valuable to our business. Mr. Davis previously served as Lead Independent Director for four years and currently chairs our GCN Committee and serves on our Finance Committee.

Business Experience:

• Executive Chairman, U.S. Bancorp, a multi-state financial holding company (April 2017 to present)
• Chairman, U.S. Bancorp, (2007 to April 2017) and CEO (2006 to April 2017). In January 2017, U.S. Bancorp announced that Mr. Davis would be retiring from these positions effective April 18, 2017 and would become the Executive Chairman of U.S. Bancorp
• President, U.S. Bancorp (2006 to January 2016)

Committees:

• Finance Committee
• Governance, Compensation and Nominating Committee (GCN) (Chair)

Director Qualifications and Experience:

With a long and distinguished career in the utility industry, Mr. Fowke provides the strategic focus and leadership needed to position the Company well for the future. Having served as the Company's Chief Financial Officer, he has a strong background in finance, financial reporting, and shareholder outreach. His extensive experience in environmental issues, operations, and the energy business makes Mr. Fowke keenly familiar with the risks we face and provides unique insight into effective management of those risks that has delivered strong results over the long term. His tenure and involvement in the utility industry provides significant expertise in regulatory issues that are central to our business. With his service as a director of nonprofit institutions and utility industry organizations, he provides good understanding of not only the opportunities and challenges of our business, but also the customers and communities we serve. Mr. Fowke serves as Chairman of the Board.

Business Experience:

• Chairman of the Board and CEO, Xcel Energy Inc. (2011 to present)
• President, Xcel Energy Inc. (2009 to present)
• Chief Operating Officer, Xcel Energy Inc. (August 2009 to August 2011)
• Various Executive Positions with Xcel Energy Inc. since 2002

Committees:

None

Director Qualifications and Experience:

Mr. O'Brien has extensive executive experience that provides to the Board valuable strategic insight, leadership skills, and a sound understanding of delivering effective operations in an expansive and capital-intensive business. His acumen in financial reporting and accounting has been determined by our Board to qualify him as an audit committee financial expert. He is currently consulting in the areas of strategy and leadership and operating effectiveness with select mining and private equity firms considering investments in the mining industry. His background in both the mining and electric and gas industries is directly relevant to our business and he brings both valuable experience in effective management of environmental issues and expertise in industry and regulatory issues to our Board. He serves on our ONES and Audit Committees.

Business Experience:

• Independent Consultant (October 2015 to current)
• President and CEO, Boart Longyear Limited, a global provider of drilling services, equipment and performance tooling for mining and drilling companies globally (April 2013 to October 2015)
• CEO, Newmont Mining Corporation, a global gold mining company (September 2012 to February 2013)
• President and CEO, Newmont Mining Corporation (July 2007 to September 2012)

Committees:

• Audit Committee
• Operations, Nuclear, Environmental and Safety Committee (ONES)

Director Qualifications and Experience:

Mr. Policinski's extensive experience leading a rapidly growing, multinational food and agricultural cooperative provides valuable leadership experience, strategic insight, and experience in effectively addressing environmental issues. As president and CEO of the third-largest United States cooperative, Mr. Policinski has extensive experience in effectively managing operations, addressing new risks and regulatory requirements, and delivering value via effective growth management. He is well versed in finance and the financial reporting process. An active member of the community, Mr. Policinski serves as a director of a number of nonprofits, educational institutions and trade industry groups and provides a solid understanding of the communities we serve. Mr. Policinski was elected to serve as our Lead Independent Director in May 2016 and serves on our Finance Committee.

Business Experience:

• President and CEO, Land O'Lakes, Inc., an agricultural and dairy cooperative (October 2005 to present)
• Senior leadership positions at Land O'Lakes, Inc. and The Pillsbury Company, a grain processor and food production company

Committees:

• Finance Committee

Director Qualifications and Experience:

With extensive experience leading large and complex businesses, Mr. Prokopanko brings leadership skills and strategic insight to the Board. Throughout his career he has gained valuable experience in creating growth, managing expansive operations, building key assets and effectively addressing environmental issues. His experience in commodities, with capital-intensive businesses, and as a director on other public companies brings valuable and relevant expertise to the Board. Mr. Prokopanko works with and serves on the boards of several nonprofit organizations and brings a thoughtful understanding of the communities we serve. He serves on our ONES and Audit Committees.

Business Experience:

• President and CEO, The Mosaic Company, producer of phosphate and potash crop nutrients (January 2007 to August 2015)
• Executive Vice President and COO, The Mosaic Company (July 2006 to January 2007)
• Senior Leadership Positions, Cargill Corporation, trading, purchasing and distributing grain and other agricultural commodities (1999 to 2006)

Committees:

• Audit Committee
• Operations, Nuclear, Environmental and Safety Committee (ONES)

Director Qualifications and Experience:

As leader of a management development and strategy planning business, Ms. Sampson brings valuable expertise and business experience to the Board. She provides valuable perspective in ethics and business conduct, talent acquisition, retention and development, diversity and social responsibility, all of which are important issues to our stakeholders. Her experience as a business owner provides insight into finance and the financial reporting processes. Ms. Sampson is the former CEO of the Greater Minneapolis Area Chapter of the American Red Cross and is a former and current board member of various religious and philanthropic organizations within the communities we serve. She serves on our Audit and Finance Committees.

Business Experience:

• CEO, President and Owner, The Sampson Group, Inc., a management development and strategic planning business (1996 to present)
• Former CEO, Greater Minneapolis Area Chapter of the American Red Cross

Committees:

• Audit Committee
• Finance Committee

Director Qualifications and Experience:

Mr. Sheppard brings to the Board extensive leadership experience in electric utilities, a solid understanding of the issues facing our industry, and valuable expertise on effective and efficient operations. He is a recognized expert in the nuclear industry, having overseen nuclear operations for major utilities and currently consulting on nuclear projects under development across the globe. His experience provides valuable insight, knowledge, business acumen, and judgment that is valuable to our nuclear operations and is extremely helpful to the Board. Mr. Sheppard serves on our ONES and GCN Committees.

Business Experience:

• Independent Consultant (January 2011 to present)
• Senior Vice President and Chief Nuclear Officer, Southern California Edison, an electric utility (September 2010 to December 2010)
• Independent Consultant (January 2010 to August 2010)
• Chairman, President and CEO, STP Nuclear Operating Company (April 2003 to December 2009)
• Senior positions, South Texas Project, Sequoyah Fuels Corp. and Robinson Nuclear Project (1990 to 2003)

Committees:

• Governance, Compensation and Nominating Committee (GCN)
• Operations, Nuclear, Environmental and Safety Committee (ONES)

Director Qualifications and Experience:

Mr. Westerlund has extensive experience in corporate governance, environmental and workforce issues, bringing valuable insight to the Board. Having served as a senior executive in a Fortune 500 company, he brings leadership skills and business acumen to the Board. Mr. Westerlund was responsible for environmental health and safety, corporate compliance, security, real estate activities, and human resources, including labor and employee relations, and benefits while at Ball Corporation, and he brings extensive knowledge of compliance, corporate governance, compensation, and equal employment opportunity issues to the Board. He serves on the boards of a number of community organizations. He previously served as Chair of our GCN Committee, and currently serves on the GCN and Finance Committees.

Business Experience:

• Executive Vice President, Administration and Corporate Secretary, Ball Corporation, a supplier of metal packaging, aerospace and other technologies and services (2006 to September 2011)
• Senior level positions with Ball Corporation prior to 2006

Committees:

• Finance Committee
• Governance, Compensation and Nominating Committee (GCN)

Director Qualifications and Experience:

Ms. Williams brings extensive experience in leadership with a major investment management company, providing valuable and unique strategic insights to the Board. Her strong financial background is particularly valuable in our capital-intensive industry and she has been determined to be an audit committee financial expert by our Board. She brings extensive expertise in risk assessment and management that is valuable for our business. She is active in the community and serves as a trustee of a number of nonprofit and educational boards. Ms. Williams is the chair of our Finance Committee and serves on our Audit Committee.

Business Experience:

• Partner, Wellington Management Company, LLP, an investment and asset management company for institutional investors (1995 to 2005)
• Leadership positions, Loomis, Sayles & Co., Inc., an investment management company, and Imperial Chemical Industries Pension Fund (prior to 1995)

Committees:

• Audit Committee
• Finance Committee (Chair)

Director Qualifications and Experience:

With a career as a senior executive in consumer products industries, Mr. Wolf brings strategic insight, business acumen and valuable experience to the Board. He served as Chief Financial Officer of a major corporation and contributes valuable experience in and knowledge of finance, reporting and governance. Mr. Wolf has been determined to be an audit committee financial expert by our Board. Having led both organizations and the integration of organizations, Mr. Wolf has a sound understanding of business risk and effective risk management oversight. He serves as a director of several nonprofit and educational organizations. Mr. Wolf is chair of the Audit Committee and serves on the ONES Committee.

Business Experience:

• President, Wolf Interests, Inc., an investment company (June 2010 to present)
• Chief Integration Officer, MillerCoors Brewing Company LLC, a consumer beverage product company (2008 to June 2010)
• Prior leadership positions with Molson Coors Brewing Company and Coors Brewing Company

Committees:

• Audit Committee (Chair)
• Operations, Nuclear, Environmental and Safety Committee (ONES)

Director Qualifications and Experience:

With extensive experience in banking and economic development, Mr. Yohannes provides valuable strategic insight and leadership skills. He was nominated by President Barack Obama to serve as the United States Ambassador to the Organization for Economic Cooperation and Development in 2014. Prior to his government service, Mr. Yohannes specialized in financial services and the renewable energy sector. He is passionate about protecting the environment and provides experience in effectively addressing environmental issues. Mr. Yohannes is active in his community and has served on various nonprofit boards and civil organizations.

Business Experience:

• United States Ambassador and Permanent Representative to the Organization for Economic Cooperation and Development, including the International Energy Agency and the Nuclear Energy Agency (April 2014 to January 2017)
• Chief Executive Officer, Millennium Challenge Corporation, an independent U.S. Government foreign aid agency (November 2009 to April 2014)

Committees:

None