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Title: Herbert Hoover Dike, Dam Safety Modification Study: Glades, Hendry, Martin, Okeechobee, and Palm Beach Counties, FL
Authors: United States. Army. Corps of Engineers. Jacksonville District.
Keywords: Environmental protection
Environmental impact analysis
Environmental impact statements
Publisher: United States. Army. Corps of Engineers. Jacksonville District.
Abstract: The purpose of the Herbert Hoover Dike (HHD) Dam Safety Modification Study (DSMS) is to identify and recommend a cost effective alternative risk management plan (RMP) that supports the expeditious reduction of risk at HHD. While the primary purpose of the remediation of HHD is to ensure public safety, objectives of the project also include lowering the probability of experiencing a breach and incurring impacts on ecological, cultural, and aesthetic resources, including these resources in the Everglades resulting from a breach. Species and habitats directly on the dike and within the path of the water due to a breach would be negatively impacted, and snail kite critical habitat could be negatively impacted due to lower lake levels. Further, if a breach were to occur along the southern perimeter of HHD, flooding would occur within the Everglades Agricultural Area (EAA) and further south, through the Water Conservation Areas (WCAs) and eventually to Everglades National Park. There are many state and federally protected species within south Florida that would be negatively impacted due to a loss of habitat from flooding resulting from a breach of HHD. The comparison of the final array of alternatives has resulted in the identification of the economically, environmentally, and socially efficient alternative as the plan being recommended to reduce the overall risks attributed to a breach associated with the Herbert Hoover Dike. Alternative 3 has been identified as the Recommended Plan. The Recommended Plan consists of cost-effective structural measures that work in unison to reduce the likelihood of a breach at HHD and achieves the primary objective of protecting public safety. The Recommended Plan includes construction of risk reduction measures around the southern half of HHD and limited areas in the northwest sides of the dam, greatly reducing the potential for breach-related damages to the nationally significant agricultural industry in the Everglades Agricultural Area, and the nationally and internationally significant Everglades ecosystem. The probability of experiencing a breach and incurring substantial impacts on ecological, cultural, and aesthetic resources would be greatly reduced with the implementation of the Recommended Plan. Adverse effects associated with implementing the Recommended Plan are expected to be minimal to moderate. Many effects, such as impacts to recreation and noise levels would be temporary during construction activities.
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