Atlantic Beach Coastal Hazard Assessment, Atlantic Beach, FL
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As part of a multidisciplinary team, ATM, a Geosyntec company, conducted the coastal hazard assessment component of a coastal vulnerability assessment.

ATM estimated future coastal flood risks from increased storm surge elevations and wave heights at Atlantic Beach using SLR projections through site-specific modeling using FEMA’s Coastal Hazard Analysis and Mapping Program (CHAMP) Version 2.0 model suite.

The overall vulnerability assessment reflects forward-thinking modeling while adhering to FEMA methodology in projecting the likelihood of 100-year floods 25, 50, and 100 years in the future. The assessment produced a series of flood maps using this methodology and also calculating future SLR, which FEMA does not do. The net result is the City now has a new set of flood insurance rate maps that take into account SLR conditions. The data indicate that SLR will be 1.3 feet in 25 years; 2.9 feet in 50 years; and 7.0 feet in 100 years.

The Northeast Florida Regional Council (NEFRC) honored the City of Atlantic Beach with a Regional Award for its coastal vulnerability assessment.

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Project Summary

  • Location: Atlantic Beach, FL
  • Client: City of Atlantic Beach, FL
  • Project Practice Areas: Coastal & Waterfront
  • Type of Facility: municipality
  • Services Provided: Determination of future 100-year coastal flood hazards due to anticipated sea level rise (SLR); site-specific coastal hazard modeling; flood hazard maps
  • Type of Work: climate resiliency, flood risk assessment