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Repair and Modernization of Waterfront Facilities at Sumay Cove, Naval Base – Design Build

Sea Engineering (SEI), as part of the design-build team of Wilson Okamoto Corp. and Bulltrack-Watts JV, was responsible for the design for a revetment along approximately 270 ft of shoreline at the headland between Sumay Cove and Clipper Cove in Apra Harbor, Guam. Work included review of existing available information concerning extreme wave conditions near Apra Harbor; implementation of a finite element numerical model to calculate the transformation and transmission of those waves to the project site at Sumay Cove; analysis of oceanographic design criteria; and preparation of a basis of design report. The CGWAVE numerical model contained in the Surface water Modeling System (SMS) was used for this analysis.

CGWAVE is a finite element model that employs the Mild Slope Equation (MSE) to simulate wave characteristics in nearshore environments. Model cases were run for 2, 5, 10, 25, and 50-year return period wave heights. A riprap revetment concept plan was developed for the site.

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