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" - Huitt-Zollars prepared PS&E and right-of-way documents to close an <br />u existing gap in Orange County's Master Plan of Arterial Highways between <br />., Ortega Highway and the City of San Clemente. This 3.7 mile long, $72 <br />million project was comprised of critical elements that came together <br />for the project's success: working within the Prima Ooshooha Landfill <br />and designing controlled access to the landfill; widening an existing <br />a - - section of roadway that most remain in operation to serve the landfill and <br />adjacent high school; and pioneering newroadwaythrough undeveloped, <br />mountainous terrain with final roadway grades up to 7%. Huitt-Zollars <br />overcame multiple challenges associated with the following critical <br />elements: moving 15 million cubic yards of earth; performing landslide <br />remediation; mitigating offects of constructing the roadway through a <br />former landfill area and relocating more than one billion pounds (850K <br />cubic yards) of municipal solid waste; relocating two steel lattice electrical transmission towers; actively communicating with impacted <br />communities; and responding to numerous environmental mitigation measures that must be implemented during design and construction, <br />Challenges were also associated with constructing deep drainage culverts, storm drainage systems and water quality basins, two east in <br />place bridge evercrossing and five 30 -foot diameter steel multi -plate tunnel undercrossings. Installed approximately 3,000 L6 of sewer and <br />domestic water line. <br />The project included installation of approximately 3,000 LF of sewer and domestic water line and construction/extension of 22 cross culverts <br />beneath the future roadway and a substantial roadway storm drain infrastructure comprised of more than 15,000 linear feet of reinforced <br />concrete pipe; ranging in size from 18to108inches indiameter. The roadway storm drain Infrastructure segregates roadway runoff from offsite <br />Cly <br />drainage areas in order to facilitate treatment of roadway impervious surfaces. To meet Orange County criteria and NPDES requirements, a <br />• <br />total of six combined basins (to address water quality, hydromodificatian, and detention) were included in the project to address pollutants of <br />-peak <br />t <br />concern and meetLID-requirements. Flood control requfroments are met by providing additional flow detention storage (over tan acre- <br />Geotecpakal <br />feet) to these basins, <br />RELEVANT DESIGN COMPONENTS: <br />VafueEngineartng <br />• <br />Land(IREngineeang <br />• ` Sewer and Domestic Water <br />• <br />Pavement Rehabilitation & Overlay <br />• Road Widening <br />• <br />Geotecpakal <br />•. < Gap Clespre, <br />StotneDrain <br />• RetdmrngWalis <br />• <br />'MrnorStrucfures <br />• Bridges and'CSSP <br />` • <br />'Traffrc Slgnals +` <br />• '- Design, Geometfias, PS&E " <br />At Con troUCunstede lon Staging <br />• � fJydrology k Hydraulics ; <br />° •,Signage <br />& Stripi�rg <br />• ". Btldga"Co`mb�rterpro graniff <br />Ceestrueli SSDp0 <br />• _ Rigbt-Bl Wey <br />;tf�liitye rdinefiop & Relocation <br />Project of The Year Award <br />design Quality Partner Award for Projects $51 - $100 Million <br />92 on Roads and Bridges Magazine Top 10 Roads List <br />0 E S T Award for a Rogional Transportation project <br />:.............................................................: <br />HUITT7QLM City of Santa Ana Civil Engineering Services: RFP 17-083 10 <br />25E-234 <br />