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Huift-lollars 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 Deshecho Landfill <br />and designing controlled access to the landfill; widening an existing <br />section of roadwaythat must remain in operation to serve the landfill and <br />adjacent high school; and pioneering a new madwaythrough undeveloped, <br />mountainous terrain with final roadway grades up to 7%. Huft-Ioilars <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 30400t 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 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 sizefrom 18to 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, hydromodification, 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 DESIGN COMPONENTS: <br />+ <br />Value Engineering <br />• <br />Landfill Engineering <br />• <br />SewarendDomestic Water <br />* <br />Pavement Rehabilitation & Overlay <br />• <br />Road Widening <br />0 <br />Geolechakal <br />• <br />Gap Closure <br />• <br />storm Grein <br />• <br />Retaining Will; <br />* <br />Minor Structures <br />• <br />Bridges and CSSP <br />* <br />Traffic Signals <br />• <br />Design, Geumehics, PSK <br />a <br />Traffic ControlOostruction Staging <br />• <br />Iry4mkv& 4dreuRcs <br />* <br />signage & Striping <br />• <br />Br1410Computer Pmgrams <br />• <br />Construction Support <br />• <br />Right -of Way_ <br />• <br />Utility Coordination &Relocation <br />`. Project of The Year Award <br />Design Quality Partner Award for Projects $51 - $100 Million <br />02 on Reads and Bridges Magazine Top 10 Roads List <br />8.E1T. Award for a Regional Transportation Project <br />Hui 11-ADLILIIV Cityof Santa Ana Civil Engineering Services: RFP 17-083 10 <br />