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On August 29, 2001, the U.S. Army Corps of Engineers (USACE), Jacksonville District authorized Coastal Systems International (Coastal Systems) to perform Phase I investigations for the 227 Demonstration Project at the 63rd Street Erosional Hot Spot, City of Miami Beach, Miami-Dade County. The Phase I investigations consisted of an analysis of beach erosion and sand transport, both cross-shore and longshore, for most of Miami-Dade County and in the vicinity of the 63rd Street Hot Spot. Based on these investigations, basic design parameters for a demonstration project were determined. This work will also provide calibration data for Phase 11 sediment transport modeling, and the investigations will be the basis for detailed shore protection design parameters for the demonstration project. The 63rd Street erosional hot spot demonstration project site along the City of Miami Beach shoreline provides an excellent opportunity to address "erosional hot spot" issues which are being experienced in many Federal shore protection projects. Beach fill hot spots are problematic in that they may trigger early project renourishments thereby increasing project costs. To address these issues, Section 227 of the Water Resource and Development Act of 1996 (WRDA 96) authorized the National Shoreline Erosion Control Development and Demonstration Program (NSECDDP). The Program is aimed at advancing the state-of-the-art and innovative shore protection solutions on the open coast in coastal shoreline protection. The Section 227 legislation provides a vehicle by which shore protection devices, designs, and methods can be constructed, monitored and evaluated.
This report documents the background and performance of the "Dade County Beach Nourishment Project", which was constructed over the period 1976 to 1983. This report presents data and analysis results based on beach profile monitoring, and the resulting shoreline changes and sand volume changes. The report draws upon monitoring data available for the period preceding and following the beach nourishment project for quantitative analysis of the beach fill performance and understanding ofcoastal processes in the study area, focusing particularly on areas within the project which, atypically, perform poorly compared to expectations or neighboring areas. These areas are called "Erosional Hot Spots" (EHS). Also presented are evaluations of the overall performance of the project. This report includes appendixes that provide access to much of the processed data for analysis by others, who may be interested in greater detail. Appendix A presents plots of the profile survey data listed by DEP Monument Number for visual inspection and Appendix B provides plots of shoreline and volume changes for different periods.