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Because of their location along the Atlantic Ocean and Intercoastal Waterway , the City of Vero Beach , Town of Indian River Shores , Town of Orchid , the City of Sebastian , and unincorporated County are more apt to experience beach erosion associated with wave or current action . 4. 1 . 8. 3 Vulnerability Assessment Erosion can have the following potential impacts within a commun ty : • Soil/beach erosion ; Navigable waterway impairment; • Economic disruption ; • Damage to critical environmental resources ; and • Stormwater drainage impairment . Indian River County' s vulnerability to soil collapse and beach eros on is moderate along its entire coastline . The City of Vero Beach has a significant beach erosion problem , which resulted in two of the FEMA repetitive damage properties reported . Ot er beachfront communities report low to moderate erosion problems . Erosion also is a potential vulnerability for the communities located on both the Indian and Sebastian rivers , Vulnerability in the rest of the County is low to very low, with the exception of specific locations along some drainage canals . The Department of Public Works has identified the following areas as being in need of beach nourishment projects : Summerplace Subdivision ; • South Beach — Sector 7 — Porpoise Point ; and • Sanderling Subdivision . 4. 1 . 8. 4 Risk Assessment FDEP updated a statewide assessment of beach erosion in 2002 . In that assessment , FDEP defined the " critical erosion area" as a segment of shoreline where natural processes or human activity have caused or contributed to erosion and recession of the beach or dune system to such a degree that upland development , recreation interests , wildlife habitat , or important cultural resources are threatened or lost. There are five critical erosion areas (9 . 1 miles ) and four noncritica erosion areas (4 . 7 miles ) in Indian River County . The northern 3 miles ( R1 - R17) south of Sm. bastian Inlet have critical erosion threatening SR A- I -A, Sebastian Inlet State Recreation Area facilities , the McLarty State Museum , and private development . The museum has beel armored with a rock revetment, and inlet sand transfer is conducted south of the inlet . A 3 . 0- mile segment of coast ( R17- R33 ) and a 0 . 6 - mile segment ( R34- R37 ) in the northern portion of the County continue to erode with no immediate threat. These areas are being monitored , A 0 . 2- mile segment ( R33- R34 ) is now critical with threatened development . A 2 . 0- mile erosion segment at Wabasso Beach ( R37 - R47 . 4 ) has critical erosion threatening development and recreational interests . South of Wabasso Beach , a 0 . 7- mile segment of coas ( R47 . 4- R51 ) continues to erode and is being monitored . The northern 3 . 1 mile of Vero Beach ( R70 - R86 ) are critically eroding with development and recreational interests being threataned . Much of this area has seen armoring , dune restoration , and small nourishment projects ; although a major beach restoration has not yet materialized . In southern Indian River County , a 0 . 4- mile 4-45