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<br /> i Calvin. Giordano & Associates, Inc.
<br /> E % C E P 1 I O N A I S O l U i l O N $
<br /> ® HALLANDALE BEACH NE QUADRANT
<br /> ® DRAINAGE BASIN STUDY & IMPLEMENTATION
<br /> ® Hallandale Beach, Florida
<br /> ® _-., -r: l° � 11 l C , :r i Client
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<br /> ® I �+ .. : �1` " f, -, r } `4;,,r0 't' h� ''I j City of Hallandale Beach
<br /> ,. .rte c[ ".a 4 . �� o'', 4-2tG . '+
<br /> E " - :� _ 'P t' �v)—tit!IL.x ' ' '6 Contact information
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<br /> ® f� fir ' '(`ir.rW�,`' �+ Alt�\� 30� `.- . .1;.4",:,o ; ..-
<br /> --. ,. at time of project:
<br /> ® P -*% t --Jr / �i. , '1 g; ' Richard Labinsky,PE
<br /> .r t _, 't - V.'''. hp.i f �1 City Engineer
<br /> O N� �` }Fagg= �'j' ` el;..-v...,'� f -- . 630 Northwest 2nd Street
<br /> • ` ± 'Y ) 1 ,-,..,,,,,,a) it . .41 ' Hallandale Beach,FL 33009
<br /> �1 --1 r ;r , e �. 1; i (954)457-1620
<br /> ® °��„w® }alp f?j --i • =26 2 a r-iiriniiinr:f ar� . _• t j, (954)457-1624 (Fax)
<br /> V. m s41; 7 , 4 6 Project Date
<br /> ® Calvin, Giordano&Associates (CGA) is currently in the design phase of implementing the 2009-2012
<br /> ® recommendations resulting from the drainage study for Hallandale Beach NE Quadrant Services Provided
<br /> ® Drainage Basin which encompasses an area of approximately 170± acres. This tidally
<br /> ® influenced basin is bounded by Atlantic Shores Boulevard, Federal Highway (US-1), Drainage Study
<br /> Hallandale Beach Blvd (HBB), and NW 14th Avenue in the City of Hallandale Beach, Pump Station& Drainage
<br /> ® Florida. Land uses within the study area are primarily single family residential and multi- Well Design and Permitting
<br /> ® family residential.
<br /> Principal in Charge
<br /> ® There are a number of drainage facilities within the project area with limited conveyance Karl Kennedy,PE
<br /> ® capacity and high head loss. Average lowest floor elevations average between 5.5' to 6.5'
<br /> 0 NGVD, and roadway elevations are approximately 3.7' to 3.9' NGVD within the study Project Manager
<br /> area. The conveyance system is subject to the effects of tidal fluctuation; and therefore at
<br /> ® times there is virtually no head available to drain the basin. To convey the storm water Douglas Taylor, PE
<br /> ® from the basin, there are six existing gravity drainage wells and a single gravity outfall to
<br /> the Intracoastal Waterway. The lack of conveyance capacity within this system has led to Team Members
<br /> ® 37 Severe Repetitive Loss (RL) properties and the complete inundation of the roadway Jenna Chamberlain,PE
<br /> ® system for extended periods during storm events of lesser frequency than that required Francisco Reina, El
<br /> 0
<br /> by SFWMD. Mohammed Sharifuzzaman,PE
<br /> ® Using ICPR, CGA modeled a proposed system of four pump stations connected to four Construction Cost
<br /> wells each (for a total of sixteen wells) while maintaining the existing gravity wells and
<br /> • gravity outfall. These sixteen new wells will be pressurized with fifteen (15) feet of head $6,800,000(EM.)
<br /> ® in order to produce the necessary discharge into the G3 aquifer. FDEP and the Broward Consultant Cost
<br /> 0 County Environmental Resource Department have given approval to the concept,and the
<br /> wells are currently in for permitting with FDEP. While not able to reduce the effects of a $420,000
<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
<br /> ® tidal flow into the new system. Along with the existing FEMA HMGP grant already
<br /> committed to the project, CGA has obtained $4 million in additional funds for the
<br /> ® construction improvements from FEMA for this phase and an additional $5 million for
<br /> ® the next phase.
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