EXHIBIT 21 SUBSIDIARIES OF THE REGISTRANT All of the following subsidiaries of TECO Energy, Inc., are organized under the laws of Florida except as indicated. The following list omits certain subsidiaries pursuant to paragraph (b)(21)(ii) of Regulation S-K Item 601. Tampa Electric Company Power Engineering & Construction, Inc. TECO Diversified, Inc. TECO Transport Corporation Electro-Coal Transfer Corporation (a Louisiana corporation) G C Service Company, Inc. Gulfcoast Transit Company Mid-South Towing Company TECO Towing Company TECO Coal Corporation (a Kentucky corporation) Gatliff Coal Company (a Kentucky corporation) Rich Mountain Coal Company (a Tennessee corporation) Clintwood Elkhorn Mining Company (a Kentucky corporation) Pike-Letcher Land Company (a Kentucky corporation) Premier Elkhorn Coal Company (a Kentucky corporation) TECO Properties Corporation TECO Coalbed Methane, Inc. (an Alabama corporation) TECO Finance, Inc. TECO Oil & Gas, Inc. TECO Investments, Inc. TECO Power Services Corporation Hardee Power I, Inc. Hardee Power II, Inc. Hardee Power Partners, Ltd. TPS Guatemala One, Inc. Tampa Centro Americana de Electricidad, Limitada (a Guatemalan Limited Liability Company) TPS Operations Company TPS International Power, Inc.(a Cayman Islands Limited Liability Company) Bosek, Gibson and Associates, Inc. TeCom Inc. Peoples Gas Company Peoples Cogeneration Company Suwanee Gas Marketing, Inc. TECO Gas Services, Inc.