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Comprehensive Plan Future Land Use Element effective land use patterns that provide for separation and incorporate the use of buffers. Areas which contain incompatible uses are often older areas in transition from one use to another. Coastal High Hazard Area As implied by its title, the Coastal High Hazard Area (CHHA) is an area of increased risk to life and property due to hurricanes and/or severe storms. For that reason, certain land uses may not be appropriate within the CHHA. As defined in state law, The coastal high - hazard area is the area below the elevation of the category 1 storm surge line as established by a Sea, Lake, and Overland Surges for Hurricanes (SLOSH) computerized storm surge model. The CHHA, is depicted in Figure 2.29. Overall, unincorporated land within the CHHA is low density in character. In fact, there are several large tracts of land within the CHHA that consist of environmentally sensitive estuarine wetlands. In the unincorporated area, those lands, located along both sides of the Indian River Lagoon, are designated C-2 on the future land use map. C-2 designated lands may be developed at 1 unit/40 acres or used for a density transfer of 1 unit/acre to an upland site. Most of the rest of the unincorporated land within the CHHA consists of residential land with development potential and permitted densities ranging from 3 to 10 units/acre. A substantial portion of this land is currently developed. Much of that development took place at a time when the CHRA was more narrowly defined as land on the barrier island, cast of the Coastal Construction Control Line. That relatively narrow strip of land consists mostly of dunes and sandy shoreline. In the unincorporated area, the CILIA also contains a small portion of the commercially designated land in three areas. Those areas are within the 37th Street/US 1 Node (near Indian River Memorial Hospital), the Grand Harbor Node, and the CR 51 0/US I Node (in Wabasso). When determining the appropriate land use designations for land within the CHHA, the county must consider the following facts. • The appropriateness of the land use designations, including the land use designation's 'impact on hurricane evacuation, was considered prior to plan adoption in 1990. • Since plan adoption in 1990, the CHHA has been expanded. The expansion of the CHHA, however, is based on a rule change. Other than hurricane evacuation conditions, actual conditions and circumstances affecting the land have not changed. Appendix A