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Title: Integrated Detailed Project Report and Environmental Assessment : Section 206 Aquatic Ecosystem Restoration Study Floyds Fork, Louisville/Jefferson County, Kentucky
Authors: United States. Army. Corps of Engineers. Louisville District
Keywords: Jefferson County (Ky.)
Bullitt County (Ky.)
Stream restoration
Wetland restoration
Restoration ecology
Environmental management
Environmental protection
Publisher: United States. Army. Corps of Engineers. Louisville District.
Abstract: The Non-Federal Sponsor (NFS), the Future Fund, Inc., has requested the Louisville District USACE initiate a study under the Section 206 Water Resources Development Act (WRDA) 1996, as amended, Aquatic Ecosystem Restoration to determine the feasibility of restoring ecological integrity to the Floyds Fork watershed. The Detailed Project Report (DPR) documents whether a project is warranted for Federal participation based on a feasibility level assessment of estimated costs, potential benefits, and possible environmental impacts of various alternatives, all of which follow the USACE planning and policy guidelines. The purpose of the proposed project is ecological restoration that would provide important habitat for various fish and wildlife species. The need for the proposed project is due to past human induced disturbances within the watershed that have altered and/or modified natural biological processes and have reduced flora and fauna biodiversity. These induced disturbances include, altered hydrology and hydraulics, increased colonization of invasive species, urbanization pressures, and fragmentation of suitable habitat. Floyds Fork meanders for approximately 62 river miles from its headwaters in southwestern Henry County to its confluence with the Salt River in Bullitt County, Kentucky. The Floyds Fork watershed is 285 square miles with 122 square miles contained in eastern Jefferson County. The watershed lies within the Outer Bluegrass physiographic region of Kentucky and is characterized by multiple small tributaries and exposed limestone, dolomite, and shale bedrock. The Outer Bluegrass typically has low to moderate relief and soils that range from thick, over limestones, to thin, over shales; dolomites of the Silurian are commonly well exposed (Hall, et al., 1980). Caves and sinking springs are found throughout the region. Ecosystem restoration is one of the primary missions of the USACE Civil Works program. The USACE objective in ecosystem restoration planning is to contribute to National Ecosystem Restoration (NER). Contributions to NER outputs are increases in the net quantity and/or quality of desired ecosystem resources. Measurement of NER is based on changes in ecological resource quality as a function of improvement in habitat quality and/or quantity and expressed quantitatively in physical units or index (ER 1105-2-100). For this feasibility study, several initial restoration measures were considered for each site and at stand-alone sites, giving a total of 17 alternatives to consider. Development and screening for each alternative are shown in Table 11 in Chapter 3. After preliminary screening, 7 alternatives were considered cost effective (including the No Action alternative) and 3 of those 7 were considered “best buys” after input into the IWR-Planning Suite software. The NER plan and Tentatively Selected Plan (TSP) is Alternative Plan 10, which consists of all four project areas and involves a mix of in-stream restoration, wetland creation and native plantings. This plan meets both NER objectives of reestablishing riverine and riparian connectivity. Instream restoration measures include wetland creation and enhancement, bottomland hardwood forest reestablishment, bank grading and stabilization, and in-stream restoration features such as boulder structures and large-woody debris placement. Many of these features interact with the stream’s flow and can positively influence the hydraulics of the system through slowing water down and enhancing stream development. The project first cost is $11,725,500 at the FY21 price level ($12,436,000 fully funded). The estimated Federal cost share of the project is approximately $7,621,575 and the non-Federal share is approximately $4,103,925. The USACE will complete the design and implementation phase, which includes additional design studies, plans and specifications, contract for construction, overall supervision during construction, preparation of an operation and maintenance manual, and participate in a portion of the post construction monitoring. This project will restore 49.89 acres of bottomland hardwood forest, 15.5 acres of wetlands, and 6,500 linear feet of in-stream habitat (converted to acres to calculate habitat units).
Description: Integrated Detailed Project Report and Environmental Assessment
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Environmental Documents

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