The Water Resources Development Act of 2000 (WRDA 2000) requires the State of Florida to reserve or allocate water for the natural systems associated with implementation of CERP projects. The District proposes to establish a water reservation for natural system water associated with the CERP Caloosahatchee River (C-43) West Basin Storage Reservoir Project. The purpose of this water reservation is to identify and reserve water from consumptive use for the CERP Caloosahatchee River (C-43) West Basin Storage Reservoir Project and to ensure that water is available to provide the intended benefits to the natural system. The Water Reservation rule will require consumptive use permit applicants to provide reasonable assurances that their proposed use of water will not withdraw water reserved for the natural system.