Together with rapid development of the gas turbine technology a number of combined cycle arrangements have been proposed in literature. Characteristics of such installations are different from those of the installations normally used for similar application. The purpose of this paper is to determine how these characteristics compare in the case of a large utility power plant for a Municipal Electric Power Authority in the Netherlands. Factors as plant efficiency, fuel cost, investment and capital interest may differ from case to case and have to be reconsidered taking into account site location and economic factors.