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• Short term: 10 to 21 inches of sea level rise by 2040 <br />• Mid-term: 21 to 54 inches of sea level rise by 2070 <br />• Long-term: 40 to 136 inches of sea level rise by 2120. <br />2019 Sea level rise projections are shown below: <br />175 NOAA Extreme <br />1:6 NOAA High <br />' 92 NOAA <br />i' Intermediate High <br />u <br />Z v <br />40 Observed <br />Unified Sea Level Rise Projection <br />200 <br />(Southeast <br />Florida Regional Climate Change Compact, 2019)' <br />17 <br />lPCC <br />NOAA <br />Intermediate NOAA High <br />06180 <br />Year <br />Median <br />_ <br />0 — <br />LL o <br />(Inches) <br />( High (inches) <br />N <br />2090 2100 2110 2120 <br />Inches 1 <br />w 160 <br />CLIMATE <br />CHANGE - <br />3 <br />2040 <br />10 <br />17 21 <br />> 140 <br />x2070 <br />21 <br />4054 <br />120 <br />...- L <br />a M <br />w <br />N v1 <br />2120 <br />40 92 136 <br />a100 <br />- - - <br />------- —--- --------- - ---- <br />u <br />50 Year Planning Horizon <br />w <br />J o 80 <br />6 <br />rn .�— 60 <br />a � <br />175 NOAA Extreme <br />1:6 NOAA High <br />' 92 NOAA <br />i' Intermediate High <br />u <br />Z v <br />40 Observed <br />40 <br />40 <br />IPCC Median <br />or <br />V <br />5 -Year Average <br />17 <br />�- <br />20 <br />Mean Sea Level <br />O <br />I 21 <br />_ <br />0 — <br />10 <br />1990 2000 2010 2020 <br />2030 2040 2050 2060 2070 2080 <br />2090 2100 2110 2120 <br />Year <br />CLIMATE <br />CHANGE - <br />Future changes in sea level rise will also affect the intensity and scale of storm <br />surges from tropical storms and hurricanes. Higher sea levels can cause storm <br />surges to travel farther inland than in the past, causing damage to shorelines and <br />increasing coastal erosion. The combined impacts of these events in the <br />Southeast U.S. region have the potential to cost up to $60 billion per year by <br />2050. <br />Design and Maintenance of the Dune System <br />To create this plan, the existing beach/dune conditions were evaluated utilizing <br />information obtained from onsite reconnaissance and aerial photography to <br />review. The varying conditions of the existing dune were considered to establish <br />different categories. These categories are based on the presence/health of dune <br />