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<br />
<br />SECTION 4 - APPROACH/METHODOLOGY
<br />
<br />Drainage issues in coastal Miami-Dade County are relatively complex and the ability to design solutions to
<br />solve these problems requires knowledge of and experience with tidal issues, coastal hydro-geological
<br />features, FDEP, SFWMD, and Miami-Dade DERM rules and regulations, and subsurface storm water
<br />disposal design (Class V wells).
<br />
<br />Upon being awarded.the_projectby_the_City_ofSunnyJsles_Beach, the Calvin, Giordano_&.Associates, Inc.
<br />(CGA) project manager will meet with the assigned City staff to determine specific requirements of the
<br />project, define the project budget, and will then prepare an understanding of project scope, and a
<br />preliminary project timeline. The understanding of project scope and preliminary project timeline will be
<br />provided to the City for review and approval prior to the CGA internal project "Kick-off Meeting". This
<br />"Kick-off Meeting" will occur after the initial project award meeting between City staff and the CGA project
<br />manager,
<br />
<br />At the "Kick-off Meeting", the team will be introduced to the scope, the budget and the timeline. The project
<br />manager will define the various elements of the projects and describe the quality control/quality assurance
<br />requirements at this meeting. The team project manager will periodically review the progress of the
<br />project to assure meeting the project timeline and budget as initially approved by the City. The project
<br />manager will then update City staff of the project progress.
<br />
<br />CGA will proceed to gather all available as-built information for the project area as well as all existing storm
<br />water/environmental/drainage permits. In conjunction with this task we will perform a design survey of
<br />the project area, gathering topographic information, rims and inverts on structures and pipe sizes and
<br />materials, as well as locating all above ground improvements. Using our in-house Vaxcavator system we
<br />will perform underground locates in areas of concern for potential conflicts or where a large number of
<br />utilities are crossing. Our Engineering Department will assemble all of this information in CAD drawings
<br />(Auto cad format) as a base for the construction documents.
<br />
<br />At this point CGA will meet with both DERM and FDEP to discuss potential drainage concepts. Based on our
<br />past experience we believe that the proposed drainage system will consist of preservation of the existing
<br />outfalls along with the introduction of Class V storm water drainage wells draining into the semi-confining
<br />geological strata to alleviate the current flooding conditions. In addition, where backflow prevention (such
<br />as flap gates) has not placed at existing outfalls, CGA will propose that all outfalls have backflow prevention
<br />devices to prevent tidal backflow.
<br />
<br />Upon reaching a conceptual agreement with the agencies, CGA will meet with sub-consultant Langan
<br />Engineering & Environmental Services (LEES), and discuss the requirements for the Reasonable Assurance
<br />Report (RAR) required for the Class V drainage wells, and the Specific Capacity Test (SCT) to approximate
<br />the potential drainage capacity per foot of the wells in this area. FDEP requires the RAR for all drainage
<br />wells whether they are pressurized or gravity, The RAR is necessary to determine the depth of the semi-
<br />confining geological layer. This combined information will allow CGA to approximate the number, depth,
<br />and locations of the wells necessary to achieve the reduction in storm water staging that is required. LEES
<br />will then perform the field work, develop the report and provide the information to CGA as well as the City,
<br />FDEP, and DERM, In addition, In addition, LEES will provide percolation tests, pavement cores, and borings
<br />for the project
<br />
<br />Calvin, Giordano will incorporate this data into 30% design plans and calculations. The calculations would
<br />include developing a storm water model with a computer program known as Advanced Interconnected
<br />Pond Routing (ADICPR) by Streamline Technologies. These plans and calculations will be provided for City
<br />review, City comments will then be incorporated into the plans, which will be further developed into 60%
<br />
<br />RFQ #11-11-02, Civil Engineering Services to Design Street and Drainage Improvements
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<br />Page 411
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