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'1 CIVIL ENGINEERING SERVICES TO DESIGN STREET AND DRAINAGE IMPROVEMe '1J;.~'; BID NO. 11-11-02 D METHODOLOGY Our technical approach to this project would begin in the programming and schematic design phase including permit research, limited survey and geotechnical testing, field investigation to establish the condition of the existing system, coordination with the City regarding their goals, meeting with all permitting agencies and public coordination to obtain resident concerns, Of course, all residents will , 1 want adequate drainage, but meeting with the stakeholders early on in the process I allows them to provide their suggestions and concerns, and will help to garner their support for the elements of the project. , 1 I I '1 1 I- 1 I We will look at the potential for additional drainage in the form of a combination exfiltration trenches, drainage wells and positive drainage outfalls but will also identify any other potential solutions that will fall within the project budget. The existing and proposed drainage systems will be analyzed and modeled using ICPR or other modeling software. We will analyze and model the existing system to determine various possible solutions to prevent flooding in the area, These models will allow us to evaluate benefits for several alternate solutions. Finished Floor Elevations (FFE), garage elevations, and yard elevations will be analyzed to quantify the level of protection provided to the resident's private property by the drainage improvements in compliance to FEMA CRS guidelines and assist the City in applying for CRS credits if available. Our approach takes a holistic approach at addressing the problem and is prudent given the existing flooding conditions. We believe that simply providing a piecemeal solution by adding catch basins and some exfiltration trenches may be a short term fix but is not the long term solution. In reality, adding only exfiltration trenches to comply with minimum regulatory requirements within the limited ROW will help marginally on localized ponding for small events but may not address the overall problem in the entire contributing basin area, Many times inadequate drainage systems within private property will cause overflows into the ROW during large storms overwhelming the roadway drainage systems. A combination of drainage facilities including drainage wells, outfalls to take advantage of the nearby bay and exfiltration trenches that address both quality and larger storm events for the entire contributing area will produce a long term solution. C3TS is experienced in easement acquisition and can assist the City if it is required for a new outfall. We can assist the City with all aspects of this project and long term approach will provide adequate drainage meeting city's and resident's expectations as well as save the City money by protecting their assets (roadway pavement, curb, gutters and sidewalks). C3TS has a proven track record in the evaluation, design and rehabilitation of drainage wells and exfiltration drainage systems with overflow outfalls, We have provided these services for many local municipal, county, and state agencies throughout Florida. We are extremely familiar with the local conditions having worked in extremely similar conditions for coastal communities including Golden Beach, Key Biscayne, Miami Beach, North Bay Village and North Miami Beach to name a few. Our staff are local drainage experts who are attune to the solutions for the project conditions and the regulations which need to complied with. '/'Ie have vast experience ~ith FOOT and working within their standards which is relevant to this project due the adjacent FDOT roadway - Collins Avenue A1A! In fact our in-house experts wrote the Exfiltration Systems Handbook for the Florida Department of TransQortation, as seen on thei~ tvebsite located at: http://www.dot.state.fl.us/rddesiqn/dr/files/EXFIL TRA TION-HB-2007,pdf! 46