An ongoing Tailored Collaboration project with Palm Beach County (Fla.) Water Utilities Department, “Develop a Dynamic Decision Support System (D2S2) for Water Supply Planning in the Lower East Coast of Florida” (project #4074), will develop a tool for water utilities and resource managers that allows scenario testing and rapid “what-if” analyses. The WEAP tool reported in Decision Support System for Sustainable Water Supply will be utilized in the project, expanding its applicability to a broader range of utilities by adding an alternative analysis dimension and expanding the alternative water supply options.