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erosion rates, while Sectors 6 and 8 are accretional beaches. <br />Shoreline erosion also is a potential vulnerability for the <br />communities located along the Indian River Lagoon and <br />Sebastian River. Vulnerability in the rest of the County is low <br />to very low, with the exception of specific locations along some <br />drainage canals. The Department of Public Works has <br />identified the following areas as being in need of beach <br />nourishment projects: <br />Managed by the Sebastian Inlet District through Inlet Sand <br />Bypassing Projects via the Inlet Management Plan: <br />• Sectors 1 & 2 — R-4 to R-17; <br />Managed by the County through the Beach Preservation Plan: <br />• Sector 3 — R-20 to R-55; <br />• Sector 5 — R-74 to R-86; and, <br />• Sector 7 — R-97 to R-107. <br />Risk Assessment. FDEP updated a statewide assessment <br />of beach erosion in 2014. In that assessment, FDEP <br />defined the "critical erosion area" as a segment of shoreline <br />where natural processes or human activity have caused or <br />contributed to erosion and recession of the beach or dune <br />system to such a degree that upland development, <br />recreation interests, wildlife habitat, or important cultural <br />resources are threatened or lost. <br />The County has broken the beaches down into 8 <br />management sectors based on their surrounding <br />environmental conditions and erosion rates. Sectors 1, 2, 3, <br />5, and 7 (15.7 miles) have a significant beach erosion <br />problem, as indicated by FDEP's deceleration of critically <br />eroded shoreline. The northern 9.5 miles (R1 -R51.3) south <br />of Sebastian Inlet includes Sectors 1,2, and 3 and has been <br />deemed critically eroded, threatening State Road AIA, <br />Sebastian Inlet State Park facilities, the McLarty Treasure <br />Museum, and private development along Ambersand Beach, <br />Sanderling, Summerplace, and Wabasso Beach. The <br />museum has a rock revetment to provide a barrier and safe <br />net for storm vulnerability. The Sebastian Inlet District, as <br />instructed in their inlet management plan, conducts regular <br />sand bypassing projects by trapping sand within the inlet <br />Indian River County Comprehensive Emergency Management Plan Basic Page 50 <br />