Project Overview

Evaluation of and solutions to coastal erosion and wave overtopping impacts that occurred along portions of the resort’s property.

Services Rendered

  • Coastal Engineering Site Assessment
  • Field Data Collection¬†
  • Numerical Modeling¬†
  • Conceptual Design and Alternatives Analysis
  • Government Coordination and Public Participation Support
  • Detailed Design and Construction Documents

Summary

ATM evaluated potential causes of and solutions to erosion and wave overtopping impacts that were occurring along portions of the resort’s property. After completing a site assessment and a preliminary coastal engineering evaluation, ATM proposed alternatives for cliff and beach stabilization along a portion of Barnes Bay. Detached breakwaters were also recommended for reduction of wave overtopping impacts occurring at two locations along a rocky headland feature on the property.

ATM deployed a wave and current meter and developed far- and near-field numerical modeling utilizing hindcast and site data to further evaluate the coastal processes and to develop concept designs.

As part of the design, ATM implemented several numerical models including wave transformation (SWAN, BOUSS-2D), wave interaction with structures and cliff shorelines (COBRAS) and shoreline change/sediment transport (GENESIS). Design development resulted in two 140 ft long low-crested breakwaters consisting of 6-11-ton armor stone to reduce wave impacts at the headland, and four low-crested breakwaters and 15,000 cy of beach fill to nourish and stabilize the eastern end of Barnes Bay. ATM completed pre-construction monitoring of corals and seagrass, and performed coral relocations. ATM provided limited construction phase services including physical and biological monitoring, as well as technical review and coordination of contractor construction activities.

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