The Energy Systems Modernization Office at Pacific Northwest Laboratory is developing and applying the Federal Energy Decision Screening (FEDS) system for federal installations in cooperation with the servicing utility(s). In the process, we conduct an installation-wide, fuel-blind energy-efficiency resource assessment, identify the most life-cycle cost-effective technologies, work with the servicing utility to develop a program to implement energy conservation projects and technologies, evaluate rates and rate structures, and contribute to the design and implementation of an energy savings verification procedure to evaluate the impact of installed technologies. Fort Lewis was identified as a site for a pilot program which would result in a model approach to apply to other federal installations. Fort Lewis, a large (population 35,000) military installation in Tacoma, Washington, purchases electricity through Tacoma Public Utilities (TPU). TPU in turn purchases electricity through the Bonneville Power Administration. Fort Lewis has an annual electric load of about 195,000 megawatt-hours (MWh)([approximately]40 MW). An energy conservation supply curve for the Fort was developed showing the amount of electric energy savings that can be achieved at different prices for energy saved. From these data, a proposal was prepared for acquiring approximately 43,000 kilowatt-hours of annual cost-effective electric energy savings. This proposal identified investment requirements at the Fort and the likely energy and dollar savings which will result from the investment. Approximately $10 million of investment in electrical energy efficient end-use technology was estimated to be cost-effective at Fort Lewis under this arrangement. The result is that Fort Lewis will see a reduction in its electric bill of approximately $500,000/year.