This preliminary Public Design Report (PDR) provides design information about Tampa Electric Company's Polk Power Station Unit No. 1, which will demonstrate in a commercial 250 MW unit the benefits of the integration of oxygen-blown, entrained-flow coal gasification with advanced combined cycle technology. This project is partially funded by the US Department of Energy (DOE) under Round III of its Clean Coal Technology (CCT) Program under the provisions of Cooperative Agreement between DOE and Tampa Electric Company, novated on March 5,1992. The project is highlighted by the inclusion of a new hot gas cleanup system. DOE's project management is based at its Morgantown Energy Technology Center (METC) in West Virginia. This report is preliminary, and the information contained herein is subject to revision. Definitive information will be available in the final PDR, which will be published at the completion of detailed engineering.