PLACEMENT: Departmental
TITLE:
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UPDATE ON THE HUTCHINSON ISLAND SHORE PROTECTION PROJECT
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EXECUTIVE SUMMARY:
executive summary
County staff will present the status of the Hutchinson Island Shore Protection Project.
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DEPARTMENT: Public Works
PREPARED BY: Name: Jessica Garland
Title: Coastal Program Manager
REQUESTED BY: Don G. Donaldson, County Administrator
PRESET:
PROCEDURES: None
BACKGROUND/RELATED STRATEGIC GOAL:
Hutchinson Island Shore Protection Project (SPP)
The federal beach project was authorized on August 3, 1995 as a 3.75 mile project beginning at the north Martin County line and continuing south through Stuart Beach. It was first constructed from December 1995 to April 1996 with a County funded 1/4 mile "local option" added to the south end, resulting in the full 4-mile-long project. Since that time a total of 6 projects have been constructed, including 2 partial projects (2001, 2002) and post-hurricane (recovery) projects in 2005, 2013, and 2018. Material for the first 4 projects came from Gilbert shoal, which lies approximately 1.2 miles off the southern project limit and was pumped directly to shore. The most recent projects used a hopper to transport sand from a new borrow site on St. Lucie Shoal, lying approximately 7 miles offshore and just north of the project's northern boundary. Two pipelines extended offshore at the north and south ends to move the sand from the hopper to the beach. Construction of the 422,763 Cubic Yard (CY) project was completed by the Liberty Island. To date, the total construction expenditure for all projects is $36,835,736 with funding provided by state and federal partners at a 46.59% federal, 28.86% County, and 24.55% state ratio.
The construction template includes a 90-foot (ft) wide beach berm 6.5 ft above the North American Vertical Datum of 1988 (NAVD88) and a 1 Vertical:10 Horizontal (V:H) foreshore slope. This construction berm comprises a 35-ft wide authorized desig...
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