Duke Energy’s Second Quarter Earnings Announcement Schedule and Webcast Information

CHARLOTTE, N.C. - Duke Energy will announce its second quarter 2007 earnings results at approximately 7 a.m. ET on Tuesday, Aug. 7, 2007.

An earnings conference call for analysts is scheduled for 10 a.m. ET on Tuesday, Aug. 7. The conference call can be accessed via the investors’ section of Duke Energy’s Web site, or by dialing (800) 475-3716 in the United States or (719) 457-2728 outside the United States. The confirmation code is 4333620. Please call in five to 10 minutes prior to the scheduled start time. A replay of the conference call will be available until midnight ET, Aug. 16, 2007, by dialing (888) 203-1112 with a confirmation code of 4333620. The international replay number is (719) 457-0820, confirmation code 4333620. A replay and transcript also will be available by accessing the investors’ section of the company’s Web site.

Duke Energy Corp., one of the largest electric power companies in the United States, supplies and delivers energy to approximately 3.9 million U.S. customers. The company has nearly 37,000 megawatts of electric generating capacity in the Midwest and the Carolinas, and natural gas distribution services in Ohio and Kentucky. In addition, Duke Energy has more than 4,000 megawatts of electric generation in Latin America, and is a joint-venture partner in a U.S. real estate company.