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MW TixellrnlhW AAWD"b Page a Upon completion of the field work, the video transects and DGPS data will be reduced for the 9 8 line -miles of data. Color graphics and rnaps of tho transects, hardbottom features and quadrats will be developed. The work components of Tasks 2.4 and 2.5 (less in situ water quality measurements) will be repeated for this project segment. Preliminary evaluation of potential hardbottom impacts will be performed for Sector 5, with hardbottom characterization maps produced. Overlay plan and cross-section views comparing the 1999 versus 1993 data will be produced and a report prepared by CSA and ATM for submission to the FDEP. Subsequently the FDEP will review and interpret the report and verification data to determine if the 'updating' of the Sector 5 mapping and characterization effort validates the 1993 hardbottom mapping. Task 3.0: Project Pro -Engineering, Design and Feasibility Report Introduction The Beach Nourishment Projoct Pians, Design and Environmental Assessment Report will utilize the data and information developed for the geotechnical and hardbottom mapping studies (Tastes 1 and 2) to: identify, evaluate and rank the candidate sand sources; determine locations of significant hardbottom areas and potential impacts of sand nourishment an the nearshore hardbottom resources; Identify the primary technical, environmental and logistical factors effecting Project design; and develop revised Project cost estimates based on the recommended Project design, This information will provide the basis for analyzing and evaluating alternative Project design features for each Project area including the attendant cost estimates with development of a Beach Restoration Design Memorandum Report to accompany the County's. Project permit applications) to the State and Federal governments. Given the County's Project schedule for construction of the Sector 1, 2, 3 (and potentially Sectors 5 and 7) in FY 2000-2001, it is anticipated that permit applications would be filed in July or August 1999 to acquire construction permits on or about July 2000 and, subsequently, to procure competitive bids for construction work to begin November 2000. Task 3.1 [lesion Alternate Geometric Configurations for Borrow Areas and Develop Composites for Varying Excavation limits The sand source investigationlgeotechnical studies will provide the data for the development of alternative geometric configurations of excavation within each identified borrow area. It is anticipated that 3 to a borrow areas will be identified and evaluated for the sand placement areas in Sectors 1, 2, 3, 5 and 7. This task will perform analyses of alternative cut depths and pian view configurations to determine the design which maximizes the performance of the beach nourishment Project (i.e., longevity of the beachfill), provides the desired nearshorelequiiibrated profiles slopes, and provides suitable quality nesting habitat for the endangered sea turtle. An evaluation of the composite sand characteristics for each candidate borrow area "alternate cut configuration" is critical to developing an optimal design in terms of Project performance and reducing the impacts on nearshore hardbottom habitat. This analysis will also evaluate the cut configurations in terms of reducing excavation and sand conveyance costs to each Project area. Adjustment slopes for differing sand quality will be developed to evaluate the sand characteristics that will meet FDEP requirements for sea turtle nesting and provide minimize encroachment on the hardbottom. Task 3.1 will provide section view and plan view drawings in state plane coordinates with dredge volumes, excavation depths, and sand composites for each borrow area. Task 3.2 Pry ect Pians and Design Conceptual level design principles will be employed to determine alternative beachfill template configurations and requisite sand volumes needed to construct the feeder beaches and beach nourishment Projects planned in Sectors 1, 2, 3, 5 and 7 of the BPP_ Alternative unit quantities of sand will be evaluated based on the material characteristics determined for each candidata borrow area and the proximity to significant hardbottom features. A comparison of "native" versus borrow arr.a(s) grain size characteristics will be analyzed to assess the stability and longevity for the recommended sand source. Plan