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This report describes the application of the Brookhaven Energy Economic Assessment Model (BEEAM) in the Portugal-US Cooperative Energy Assessment. Two projections of economic growth provided by the Government of Portugal for the period 1977 to 2010, with 1990 and 2000 as intermediate years, were used to drive the model. The main objectives in applying BEEAM were to investigate for each of the two scenarios and projected reference years the following: the detailed structure of energy demand at a sectoral level; the primary energy resources required to meet the final energy demand; the overall balance of trade due to both energy and nonenergy imports; the consistency or lack thereof between the projected sectoral growth rates; and the implication of the growth rates in regard to aggregate levels fixed capital formation. Additionally, the impacts of the accelerated and moderate energy conservation cases developed on energy demand, resource requirements, and the balance of trade were also determined. The structure of BEEAM, which consists of an energy-denominated input-output representation of the economy coupled to an energy supply-demand network and its mode of application in the Portugal assessment are described in detail in Appendix A.