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J <br />) <br />) <br />) <br />) <br />) <br />) <br />) <br />) <br />) <br /> <br />. ~^c'f Calvin, Giordano & Associates. Inc. <br />~ "'" .~ <br />, ts.~ "l E X C E P T ION A L SOL LI T ION S <br /> <br />. <br /> <br />HALLANDALE BEACH NE QUADRANT DRAINAGE BASIN <br />STUDY & DESIGN AND PERMITTING <br />"allandale Beach, Florida <br /> <br /> <br />) <br />) <br />) <br />- ) <br />) <br />) <br />) <br />) <br />) <br />) <br />} <br />) <br />) <br />) <br />) <br />) <br />) <br />) <br />} <br /> <br />CGA designed and permitted the recommendations resulting from the drainage study for <br />Hallandale Beach NE Quadrant Drainage Basin which encompasses an area of <br />approximately 170:t acres. This tidally influenced basin is bounded by Atlantic Shores <br />Boulevard, Federal Highway (US-l), Hallandale Beach Blvd (HBB), and NW 14th Avenue <br />in the City of Hallandale Beach, Florida. Land uses within the study area are primarily <br />single family residential and multi-family residential. <br /> <br />There are a number of drainage facilities within the project area with limited conveyance <br />capacity and high head loss. Average lowest floor elevations average between 5.5' to 6.5' <br />NGVD, and roadway elevations are approximately 3.7' to 3.9' NGVD within the study area. <br />The conveyance system is subject to the effects of tidal fluctuation; and therefore at times <br />there is virtually no head available to drain the basin. To convey the storm water from the <br />basin, there are six existing gravity drainage wells and a single gravity outfall to the <br />Intracoastal Waterway. The lack of conveyance capacity within this system has led to 37 <br />Severe Repetitive Loss (RL) properties and the complete inundation of the roadway <br />system for extended periods during storm events of lesser frequency than that required <br />by SFWMD. <br /> <br />Using ICPR, CGA modeled a proposed system of two pump stations connected to sixteen <br />wells, while maintaining the existing gravity wells and gravity outfall. These sixteen new <br />wells will be pressurized with fifteen (15) feet of head in order to produce the necessary <br />discharge into the G3 aquifer. FDEP and the Broward County Environmental Resource <br />Department have issued permits for the project. While not able to reduce the effects of a <br />storm surge coming from the east, the system will reduce the 100 year 72 hour storm <br />event stage below the lowest floor elevations within the basin, including the SRL <br />properties. The existing roadway crowns will be above the stage of a 10 year 24 hour <br />event after the proposed system is constructed and operational. In addition, backflow <br />prevention (flap gates) are designed for the existing gravity outfall system to prevent tidal <br />flow into the new system. CGA secured an additional $9,000,000 to add to the original <br />$2,000,000 FEMA HMGP grant that the City had for this project. The additional money <br />also included an expanded project area. <br /> <br />I <br />I <br />I <br />-] <br /> <br />11-4620_ Hallandale NE Quad Drainage <br /> <br />Client <br />City of Hallandale Beach <br /> <br />Contact information <br />at time of project: <br /> <br />Richard Labinsky, PE <br />City Engineer <br />630 Northwest 2nd Street <br />Hallandale Beach, FL 33009 <br />(954) 457-1620 <br />(954) 457-1624 (Fax) <br /> <br />Project Date <br /> <br />2009-2011 <br /> <br />Services Provided <br /> <br />Drainage Study <br />Pump Station & Drainage <br />Well Design and Permitting <br /> <br />Approx. Construction Cost <br />$6,800,000 - $14,000,000 <br /> <br />Consultant Cost <br /> <br />$ 360,000 <br /> <br />Principal in Charge <br />Karl Kennedy, PE <br /> <br />Project Manager <br />Douglas Taylor, PE <br /> <br />Drainage Engineers <br /> <br />Jenna Chamberlain, PE <br />Monica Morandi, PE <br />John Messerian, PE <br /> <br />Firm's Role <br />Prime <br /> <br />Page 219 <br />