KEITH Sunny Isles Beach RFQ 22-06-01 Continuing Services for Landscape Architectural Services

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Scope: •Coastal engineering •Beach design •Site analysis •Shoreline configuration •Sediment transport study •Wave surge study •Bathymetric survey •Marine engineering •Marine resource survey •Construction administration Cummins Cederberg led all surveying, coastal engineering, beach, and coastal structure design, as well as the Environmental Impact Analysis (EIA) and Environmental Management Plan (EMP) for this $200M private destination island. Two miles of beach and one mile of shoreline stabilization was designed including rock revetment, groins and breakwaters consisting of 100,000 tons of rock. Due to the client requirement of “as much beach possible” and varying conditions on the sides of island, complex analyses and MIKE21 modeling were performed as part of the design. The design was further complicated by existing dredge holes up to 60 feet close to the island, which required extensive Equilibrium Toe of Fill (ETOF) analyses to prevent sand from entering. Expansion of the island through reclamation and excavation was designed involving earthwork of approximately 1 million cubic yards. Cummins Cederberg also provided construction administration services throughout construction. A marine resource survey was conducted to map marine resources, such as seagrass and corals, which could potentially be impacted by the construction. An EIA was prepared and approved by the Bahamas Environment, Science & Technology (BEST) Commission. Detailed hurricane and wave modeling were conducted utilizing the advanced MIKE21 numerical model to determine extreme wave and storm surge conditions. Directly following the analysis, the island was impacted by Hurricane Matthew which was one of many hurricane events simulated during the design process. The modeled storm surge elevations were consistent with the observed impacts. MSC Cruises Ocean Cay Marine Reserve Bimini Island, The Bahamas 47RFQ No. 22-06-01