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• <br /> Contract#IRL2018-13 <br /> Encumbrance#s GL01-1701($36,000)&GL01-1895($25,000) <br /> A. Final Design <br /> As part of the process for developing the Master Plan for the site,the County has completed a <br /> preliminary design of the restoration/creation of wetlands. Plan views and cross sections depicting <br /> the proposed layout and composition of the wetlands are included as Attachment#1 to this Draft <br /> Work Plan. As shown on the plans,the County proposes to create 2.8-acres of saltmarsh with <br /> contiguous upland areas to augment habitat diversity on the site. The County is in the process of <br /> collecting geotechnical and additional topographic data required to prepare final design plans suitable <br /> for submittal of required wetland permit applications for construction.Final design considerations <br /> include: <br /> > Assess pre-existing site features to maximize the cost/benefit ratio for establishing <br /> wetland habitat and water quality benefits; <br /> > Design of the solar pump station to operate continuously, or to mimic high tide/low tide <br /> cycles; <br /> > Assess design of a solar pump station that will lift plankton and small fish species into the <br /> wetlands without causing harm; <br /> > Assess design of a discharge structure that will allow fish and plankton to escape from the <br /> wetlands into the discharge flow-way, and ultimately back into the Lagoon; <br /> ➢ Design of the discharge flow-way to maximize nutrient uptake on a per unit area basis; <br /> > Utilization of the geotechnical and topographic data to refine the wetland design to <br /> maximize the diversity of proposed wetland communities. <br /> > Develop a dewatering plan for construction to be approved as part of the permitting <br /> process. <br /> The current schedule for the project includes submittal of wetland permits in July 2018. Pre- <br /> application meetings have been held with both the St. John's River Water Management District <br /> (WMD) and the U.S.Army Corps of Engineers (USACE), and the project has received very positive <br /> feedback.The intent is for all permits to be in place and selection of the approved Contractor prior to <br /> October 30, 2018. <br /> B. Construction <br /> The Scope of Work for the project includes the construction of the wetland and upland areas as <br /> depicted on the attached plans. This work will include: site survey, clearing, earthwork&rough <br /> grading, installation of structures, and planting. A brief summary of the proposed sequence of events <br /> is presented below. <br /> > Following site mobilization and installation of required erosion control measures,the <br /> Contractor will clear the site to remove the Brazilian pepper and ruderal groundcover. <br /> ➢ Site survey will be completed to allow for rough grading of the site. <br /> > Rough grading will be completed, and soil will be moved to create the trail and other <br /> amenities, or stockpiled in other areas of the site for use in later public improvements; <br /> > Additional survey will be completed to allow for final grading to be completed. <br /> > Upon completion of final grading and installation of structures, as-builts of the site will be <br /> generated for review and approval. <br /> > Once as-builts are approved,the pump can be turned on to bring in Lagoon waters prior to <br /> initiating planting. <br /> > Planting will begin once suitable hydrology on the site has been established. <br /> Page 15 <br />