Marineland Dolphin Adventure FEMA Preliminary Flood Map Appeal, St. Johns County, FL

Marineland Dolphin Adventure FEMA Preliminary Flood Map Appeal, St. Johns County, FL
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ATM, a Geosyntec company, successfully prepared an appeal of the preliminary FEMA Flood Insurance Rate Map (FIRM) that resulted in moving a portion of the primary frontal dune out of the VE Zone.

We reassessed the landward location of the VE zone determined by FEMA on the revised Flood Insurance Rate Maps (FIRM). Marineland Dolphin Adventure is located behind a granite revetment designed for a 30-year storm event and the landward extent of the VE zone was based on the assumption of the existence of primary frontal dune (PFD) at this site. To assess the potential for moving the VE line west and account for protection afforded by the revetment, we initiated a preliminary study that required review of the following:

  • Preliminary FIS report for St. Johns County
  • FEMA Wave model (WHAFIS) transects
  • LiDAR/DEM data used in the models
  • Revetment design and PFD occurrence and characteristics in LiDAR and survey data.

    • We determined there were potential items of appeal that would support a request to relocate the VE zone boundary. As part of the successful appeal package submitted to FEMA, we provided the following services:

  • Conducted a detailed review of FEMA preliminary data and historic data
  • Performed a partial revetment failure and wave runup analysis
  • Re-ran WHAFIS runs with better site-specific information
  • Created a revised map and completed a PFD appeal package

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    Project Summary

    • Location: St. Johns County, FL
    • Client: Georgia Aquarium (owner of Marineland Dolphin Adventure)
    • Project Practice Areas: Coastal & Waterfront
    • Type of Facility: aquarium
    • Services Provided: data review and collection; revetment failure and runup analysis; mapping; submission of appeal package
    • Type of Work: flood map appeal