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Huitt-Zollars prepared PS&E and right-of-way documents to close an <br />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 Deshecha Landfill <br />and designing controlled access to the landfill; widening an existing <br />section of roadway that must remain in operation to serve the landfill and <br />adjacent high school; and pioneering a new roadway through undeveloped, <br />mountainous terrain with final roadway grades up to 7%. Huitt-Zoilars <br />overcame multiple challenges associated with the following critical <br />elements: moving 15 million cubic yards of earth; performing landslide <br />remediation; mitigating effects 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 cast in <br />place bridge overcrossing and five 30 -foot diameter steel multi -plate tunnel undercrossings. Installed approximately 3,000 LF 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 crass 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 18 to 108 inches in diameter. The roadway storm drain infrastructure segregates roadway runoff from offsite <br />drainage areas in order to facilitate treatment of roadway impervious surfaces, To meet Orange County criteria and NPDES requirements, a <br />total of six combined basins (to address water quality, hydromadification, and detention) were included in the project to address pollutants of <br />concern and meet LID requirements. Flood control requirements are met by providing additional peak flow detention storage (over ten acre- <br />feet) in these basins. <br />RELEVANT DE$IONUMPONENTS: <br />: <br />olue Engineering <br />Landfill Engineering <br />r " Sewer and Domestic Water <br />a <br />Pavement Rehabilitation <br />A Overlay <br />Road jjdenrng , <br />: <br />Geotechnical <br />.• - ap Closure stir <br />* <br />'Sturm Drain . <br />• �Retainingwails <br />. <br />, <br />rlfinwStraclures <br />' ' ' ' <br />Y»B as 'a CSSP <br />a <br />iia(Rcrgnal <br />basrgn G6bbmel cs,PS&E' <br />++ <br />TrarficCoftfrol/CenstructianStaging <br />llydta91ms`i0004 <br />3tnping <br />`` - ''�Rri'�un"�P.'mm�rdaiPma�nmc <br />� <br />`GOtE�t%UCtId11 S1/DUer1 � <br />«. .t t. ....... a#.#.,.+#. I... a.....:.#.. I ... _. <br />Project of The Year Award <br />Design Quality Partner Award for Projects $51 - $100 Million <br />#2 on Roads and Bridges Magazine Top 10 Roads List <br />B.E.S,T, Award for a Regional Transportation Project , <br />i+.( # •,♦.. 1.tX ... <br />HUIT(-ZOMRS City of Santa Ana Civil Engineering Services: RFP 17-083 10 <br />