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Comprehensive Plan Coastal Management Element ➢ proximity to manatee aggregation areas and manatee habitat; ➢ extent of manatee use; ➢ water depth and circulation; ➢ amount of overlap in patterns of use by manatees and boats; ➢ number of manatee mortalities; ➢ natural resource constraints; ➢ boat facility demand/recreational needs; and ➢ upland site requirements • Criteria for Siting Marinas Site specific criteria which affect the siting of marinas and water -dependent uses in the unincorporated portion of Indian River County are contained in the county's land development regulations (LDRs). These existing regulations restrict the siting of commercial and recreational marinas in the unincorporated county to areas zoned for commercial or industrial development. Furthermore, the county's LDRs prohibit the siting of marinas in approved shellfish harvesting areas and areas having existing seagrass beds. Based on an analysis of FDEP manatee data, additional marina siting criteria were developed for the draft Indian River County Manatee Protection and Boating Safety Comprehensive Plan. These criteria are used to determine which sections of the inland waters of the county are conducive to marina siting. An area considered not conducive to the siting or expansion of marinas exhibits one or more of the following constraints: 1) a historically high level of watercraft -related manatee mortality; 2) a designated "high use" area, or similar refugia; 3) dense (greater than 10 percent) seagrass coverage; 4) dense shoreline vegetation and/or estuarine wetlands; or 5) inadequate water depths and/or poor circulation. Areas considered the most desirable for marina siting or expansion exhibit few of the above listed natural resource constraints, and are located proximate to the ICW and/or within five (5) miles of Sebastian Inlet. • The inland waters of Indian River County were screened with the above listed criteria in order to determine which areas of the county are the most conducive to marina siting. More detailed data and analysis regarding marina siting and expansion are contained in the draft Indian River County Manatee Protection and Boating Safety Comprehensive Plan. Following is a summary of the results of the screening process contained in the plan. These zones correspond to the map depicted in Figure 9.30. Zone 1 • ■ • •• •- --- .- • • - Indian River County Supplement # Ordiance #2005-_ Adopted Coastal Management Element Page 76 2005 Exhibit B Page 4-