PROJECTED FUTURE DESIGN FLOOD ELEVATIONS

 To inform future commercial and/or residential development in the project area considering sea level rise, coastal storm surge and wave action, Woods Hole Group calculated Significant Wave Crest Elevations (SWCEs) from the MC-FRM based on the projected near-term (2050) and long-term (2070) peak still water elevation plus the significant wave height (approximately equal to the average of the highest one-third of waves) at the 1% Annual Exceedance Probability (AEP).

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The 1% AEP (or 100-year return period) is standard for building design in the floodplain. Since MC-FRM includes physical processes, wave action and sea level rise, it is not necessary to apply freeboard to SWCEs. Freeboard is typically applied to FEMA Base Flood Elevations because these parameters are not accounted for in FEMA modeling for this region.

* Values range across the study area. The lower end of the range represents areas north of Morse Terrace; the higher end of the range represents areas south of Morse