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RESTORATION PROJECT PRESERVES LANDMARK
AND ENSURES CONTINUED SAFE NAVIGATION OF DELAWARE PAY -------------------------------------------------------------------------------- Constructed in 1914, the Brandywine Shoal Lighthouse in the Delaware Bay was the first all-concrete structure to be built in open water in the United States. When the U.S. Coast Guard retained Duffield Associates to evaluate the condition of several lighthouses in the Delaware Bay, the Brandywine Shoal Lighthouse exhibited signs of severe deterioration as a result of its years of service in an aggressive marine environment. Because the lighthouse is a historically significant structure and functions as a primary aid to navigation in the Delaware Bay, the rehabilitation project required preserving the historic character and developing a design that functions under modern specifications. The solution proposed by Duffield Associates was awarded the Consulting Engineers Council of Delaware's Grand Conceptor Award for Engineering Excellence. After performing sampling and evaluation complicated by the remote location of the lighthouse, the Duffield engineering team prioritized repairs based on severity of deterioration, structural significance of the affected area, and available construction funding. Due to variable severity of deterioration, a spectrum of concrete repairs was required, ranging from surface reconditioning to complete demolition and structural replacement. In designing each proposed repair, Duffield's team of structural and materials engineers made efforts to closely match the form and material of the original construction. Duffield Associates' rehabilitation and structural restoration of the Brandywine Shoal Lighthouse represents a comprehensive, diverse utilization of modern methods of concrete repair under difficult conditions at an open water location. |
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Wilmington, DE 
Georgetown,
DE
Philadelphia, PA Carlisle,
PA Cape
May Court House, NJ North
East , MD
Georgetown,
DE
Philadelphia, PA Carlisle,
PA Cape
May Court House, NJ North
East , MD