Standard Disclosures

INDICATOR
TOPIC
RESPONSE
Strategy and analysis
1.1 Sustainability vision and strategy See Our Mission and Values and Letter from the Chairman.
1.2 Corporate approach to sustainability and commitment at executive level See Management Approach to Sustainability and Letter from the Chairman. We also provide summaries of what we see as our key challenges and opportunities in the introductions to our five focus areas in our 2010/2011 Sustainability Report.
Organizational profile
2.1 Name of the organization Duke Energy Corporation
2.2 and 2.3 Primary products, services and divisions See The Businesses We're In and Duke Energy at a Glance Year-End 2010
2.4 Headquarters Corporate office is in Charlotte, North Carolina, USA; with significant offices in Cincinnati, Ohio; Plainfield, Indiana; and Houston, Texas.
2.5 Countries of operations Primary operations are in the United States, with power generation facilities in Argentina, Brazil, Ecuador, El Salvador, Guatemala and Peru. We also own an equity investment in Saudi Arabia.
2.6 Ownership and legal form Duke Energy Corporation is an investor-owned corporation trading on the New York Stock Exchange under the symbol, DUK.
2.7 Markets served We are primarily an electric and natural gas utility company, with electric customers in North Carolina, South Carolina, Ohio, Kentucky and Indiana, and with natural gas service to customers in Ohio and Kentucky.
2.8 Scale of operations and organization See Workforce Performance Metrics, 2010 Electricity Generated and Financial Highlights in our Sustainability Report.  More detailed information is available in our Securities and Exchange Commission Form 10-K.
2.9 Significant recent changes No significant changes in 2010.
2.10 Awards received recently Various awards and recognitions are listed on our Duke Energy Awards Web site and mentioned in the 2010/2011 Sustainability Report.
EU1 Installed capacity Duke Energy owns 39,907 megawatts of generation capacity. More detailed information is available in our 2010/20110 Sustainability Report and Securities and Exchange Commission Form 10-K, pages 33, 35 and 36.
EU2 Net energy output, by source Duke Energy generated 166,985 gigawatt-hours in 2010, with almost 40 percent coming from carbon-free sources. For details, see 2010 Electricity Generated.
EU3 Number of customer accounts Approximately four million electric customers and 500,000 natural gas customers. See Duke Energy at a Glance Year End 2010
EU4 Length of transmission and distribution lines Approximately 20,900 miles of transmission lines and 152,000 miles of distribution lines. See Duke Energy at a Glance Year End 2010
EU5 Allocation of CO2 emissions permits Not applicable in the United States.
Report Parameters
3.1 Reporting period Calendar year 2010, with certain supplemental material from 2011 if appropriate.
3.2 Date of most recent report April 2011
3.3 Reporting cycle Annual
3.4 Contact person Roberta Bowman, Senior Vice President and Chief Sustainability Officer. See Q&A with the Chief Sustainability Officer
3.5 Process for defining content See About This Report and What Matters Most in our 2010/2011 Sustainability Report
3.6 Boundary of the report All operations unless otherwise noted.
3.7 Specific reporting limitations None
3.8 Basis for reporting Complete company or ownership share of generating stations, unless otherwise noted.
3.9 Data measurement techniques Quantitative data is provided based on direct measurements, estimates and calculations according to standard industry practice or as called for in regulations.
3.10 Effect of re-statements None
3.11 Significant changes None
3.12 Location of Standard Disclosures Included in this listing.
3.13 Assurance We did not seek external assurances for this report but did ask Business for Social Responsibility for an independent review of our 2010/2011 Sustainability Report.
Governance, Commitments and Engagement
4.1 Governance structure See Principles for Corporate Governance and Board Committee Charters.
4.2 Is Chair an executive officer? Yes. Positions of Chairman, President and CEO are held by James E. Rogers.
4.3 Independent directors Our Board has determined that Jim Rogers is the only non-independent director. The other 11 members are independent.
4.4 Contact with the Board of Directors Interested parties can communicate with any of our directors (including the Lead Director) by writing to: Corporate Secretary, Duke Energy Corporation, P.O. Box 1006, Charlotte, NC 28201-1006.
4.5 Linkage of compensation and performance

Based on defined goals. For more information, see pages 40-82 of our 2010 Proxy Statement.

4.6 Avoiding conflicts of interest See Duke Energy Code of Business Ethics for members of the Board of Directors and employees.
4.7 Determining qualifications of Board of Directors This is a responsibility of the Corporate Governance Committee of the Board of Directors.
4.8 Internal mission and values statements See Our Mission and Values.
4.9, 4.10 Governance procedures and performance See Corporate Governance and Management Approach to Sustainability.
4.11 Precautionary principle Risks are assessed by each business unit without specific reference to the precautionary principle.
4.12 Endorsement of externally developed charters, principles and other initiatives Duke Energy adheres to the World Economic Forum Partnership Against Corruption Initiative (PACI), and supports programs of The Human Rights Campaign (HRC).  Partnerships and memberships in several organizations are mentioned in our 2010/2011 Sustainability Report. For the most part, these are voluntary organizations without binding obligations.
4.13 Association memberships Several, but not all, memberships are listed on our Affiliations & Partnerships Web site and mentioned in our 2010/2011 Sustainability Report.
4.14 - 4.17 Stakeholder enagement See Stakeholder Expectations and Fulfillments.