2006-224 - Laserfiche WebLink

Home Browse Search

Indian River County Work Order Number 3 Sector 3 - Design & Permitting Scope of Work prepare an opinion of probable initial construction and annual maintenance costs, prepare 81 /2" by 11 " drawings (plan and cross-section) depicting the alternative. For each alternative, the COUNTY will assess potential impacts of the project upon existing environmental resources including but not limited to hardbottom, nesting marine turtles, and shorebirds. In concert with evaluation of performance of each alternative, (a) the model "SBEACH" is expected to be applied to assess cross-shore transport and fill "adjustment" for representative profiles, and (b) the models " REFDIF" and "GENESIS" will be applied to assess longshore transport, "spreading" and shoreline evolution. To assess the potential impacts of dredging within the borrow area, COASTAL TECH will employ the model "REFDIF" to analyze expected changes in wave heights associated with borrow area cuts. However, final selection of the models and/or other specific design tools will be made in collaboration with agency staff following the initial pre-application meetings. Historical shoreline data will be used to calibrate models as appropriate. To provide a basis for assessment of environmental impacts, COASTAL TECI I will conduct a hardbottom trend analysis for the Project Area to document, identify, and locate hardbottom changes in the nearshore area_ COASTAL TECH will obtain and digitize available aerial photography to create a baseline map of nearshore hardbottom for the year 2002 or other similar time frame within the last 20 years - dependent upon the availability, consistency, and quality of aerial photography for the Project Area . Cumulative impacts will be addressed in accordance with CEQ guidelines and will include an evaluation of all past and present projects and those in the foreseeable future within the Project Area . Parameters to be evaluated include trends in nearshore hardbottom habitat from the mid 1980's through present time. Trend analysis will include mapping of nearshore hardground habitat for up to 3 selected sets of color-digitized aerials from over the past 20 years for the entire Project Area . Features will be mapped remotely from the aerials using ERDAS multi-spectral imaging software and/or Arc View GIS . Spatial analysis and trends will be identified and quantified using Arc View GIS applications. A matrix will be compiled which summarizes changes in nearshore habitat cover and the net changes expected due to each alternative and past, present and other future projects. COASTAL TECH will prepare a written report of analysis results and includes a determination regarding whether the preferred alternative will have a significant cumulative impact upon hardground habitat. The COUNTY will assess historic sea turtle nesting data and nesting beach width for the same time frame within the Project Area . The COUNTY will prepare a written report which summarizes the above and includes a determination regarding whether the preferred alternative will have a significant cumulative impact upon nesting sea turtles. COASTAL TECH will prepare a written summary ofthe preliminary design results in a Design Document, which shall include a recommended design. COASTAL TECH will meet with the COUNTY to present and review the Draft Design Document; COASTAL TECI4 will subsequently make revisions as required by the County and provide fifteen ( 15) copies of the Design Document to the COUNTY. The Design Document will be incorporated into the NEPA document — under Task 5 . The Design Document will be presented to the Beach Committee by COUNTY staff. Task 2b - Final Design Plans & Specs: Upon obtainment of the FDEP and USACE permits and/or upon COUNTY issuance of a Notice-to-Proceed, COASTAL TECH will prepare 24 " x 36 " final design drawings, with Technical Specifications for the project as eventually permitted under Task 3 . COASTAL TECH will prepare Contract Documents for bidding and award of a construction contract. The COUNTY will provide the "front-end" documents which shall be incorporated into the Contract Documents. The Page 3 of 8 June 9, 2000