The Engineer Research and Development Center is seeking a cooperative agreement for the development and application of the Willamette Systems Alternatives Analysis and Simulation Tool. This tool will be used to inform implementation and adaptive management plans. The proposed agreement includes the development of simulation tools for managing agencies, the application of simulations to inform management direction, and the incorporation of the best available data to update the simulation modeling. The work also involves completing analysis of the effects of the preferred alternative on Upper Willamette River Spring Chinook and winter steelhead, refining the Corps Fish Benefit Workbook, and delivering lifecycle models for future application. The analysis will occur once Biological Opinions from NMFS and USFWS are received, and implementation and adaptive management will begin in 2025.