Taylor Engineering evaluated the hydrologic and hydraulic restoration of the natural hydroperiod in the Loxahatchee Slough basin in Palm Beach County. The goal of this project was to integrate the water management practices of existing structures, their levels of flood service, and water supply with the proposed G-161 structure in place. The G-161 structure allows the addition of 450 cfs to the upstream reaches of the C-18 Canal's East Basin. Taylor Engineering developed an operational protocol for the addition of the G-161 structure and evaluated the ability of existing G-160 structure operational protocols to achieve target hydroperiods in the Loxahatchee Slough and still maintain existing levels of flood protection. This restoration effort included modeling pre- and post-conditions for a proposed hydraulic structure, the G-161, in the C-18 canal. Taylor Engineering applied HEC-HMS and HEC-RAS to conduct event-based and long-term hydroperiod modeling. Hydrodynamic modeling included water storage within sub-basins, controlled flow across pumps and hydraulic structures, and lateral flows from sub-basins. Taylor Engineering accounted for groundwater seepage into the canals with an existing MODFLOW groundwater canal.