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Title: Palm Beach County, Florida: Shore Protection Project, Jupiter Carlin Segment: Final Integrated Section 934 Report and Environmental Assessment: Appendix C, Economics
Authors: United States. Army. Corps of Engineers. Jacksonville District.
Keywords: Shore protection
Beach nourishment
Palm Beach County (Fla.)
Publisher: United States. Army. Corps of Engineers. Jacksonville District.
Abstract: The Federal Palm Beach County Shore Protection Project, Jupiter Carlin Segment, as originally authorized, spans Florida Department of Environmental Protection reference monuments R‐13 to R‐19 and restores approximately 1.1 miles of beach. According to the authorization, and as described in House Document 164/87/1, the project called for a seaward extension of approximately 100 feet from the mean high water (MHW) line, with a berm elevation of 10 feet above mean low water, and a seven year nourishment interval. The design template is a 0‐foot berm extension of the 1990 MHW line. The authorized project consists of the design template (the 1990 MHW line) and the 100 foot advance fill extension (the “sacrificial berm”). Palm Beach County constructed the initial project in 1995 and nourished the beach in both 2002 and 2014/2015. In accordance with Section 934 of the 1986 Water Resources Development Act, the purpose of this study consists of determining whether the authorized project is still economically justified given current conditions and, if not justified, optimizing the authorized project. The 934 analysis assumes that the design template will be maintained by the non‐Federal Sponsor while optimizing the size and timing of the renourishments. In support of the 934 Report, economic analysis was completed to determine whether future nourishments of this segment are economically justified and thus whether an extension of Federal participation in cost sharing through the year 2045 is warranted. It was determined that the 100‐foot extension of the originally authorized project is not economically justified based on storm damage reduction benefits alone. An optimization of the originally authorized plan is proposed in the current document which maximizes the net benefits. The specific purpose of this document is to describe the economic analysis of the 934 Report, including the future without project and future with project conditions as simulated by the Corps certified model Beach‐fx. This appendix contains the approach, assumptions, and results of the economic analysis. The economic analysis resulted in an optimized nourishment template consisting of a 30‐foot seaward extension beyond the design berm, with a six year nourishment interval. The average annual net benefits of the proposed optimization are approximately $1,041,000 with a BCR of 1.49.
Description: Integrated Section 934 Report and Environmental Assessment
Rights: Approved for Public Release; Distribution is Unlimited
Size: 38 pages / 2.528 Mb
Types of Materials: PDF/A
Appears in Collections:Environmental Documents

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