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Huitt-Zollars prepared plans, specifications, estimates, and the environmental revalidation <br />for the Alton Avenue Widening and Overcrossing at SR-55. The project is constrained in a <br />tight urban environment where right-of-way Impacts had to be evaluated on a case4y- <br />case basis. Major Southern California Edison lines paralleled the project area and were <br />Included In the utility investigations. The project impacted an existing open trapezoidal <br />flood control channel, which was proposed to be relocated and put in a box culvert outside <br />of freeway right-of-way. The Army Corps of Engineers was consulted regarding jurisdiction <br />over this facility, Existing ramps were redesigned to join the widened freeway. The project <br />included: <br />Development of local street Improvements along 1.3 miles of Alton Avenue from Main <br />Street In Santa Ana to Gillette Avenue in Irvine <br />Freeway widening along 1.5 miles of SR-55 from MacArthur Blvd. to Warner Ave <br />Romp modifications at MacArthur Boulevard and Dyer Road <br />A now overcrossing and structure widening <br />Design of NOV drop ramps and redesign of the NOV lanes on <br />SR-55 <br />Detailed geometric studies, topographic surveys, and final construction documents were prepared <br />W <br />by Huitt-Zollars for this $5 million project to add one through lane in each direction on Oso Parkway, <br />right -turn -only lanes In each direction on Marguarifte Parkway, and create double left -turn lanes <br />In all four directions of the existing arterial highway Intersectimr. Raised medians on all four legs <br />of the intersection were completely reconligured. Design constraints included access to existing <br />developments, an adjacent hillside slope buttress, major water pressure reducing station, and <br />other utility vaults and facilities. This project affected 4,600 linear feet of highway, three signalized <br />intersections, and included 1,700 linear feet of retaining walls. Construction plans, specifications, <br />and estimates were prepared forthis $5 million project, The work of subconsultantS for environmental <br />documentation, traffic engineering, landscape architecture, and cost estimating was coordinated by Huitt-Zollars. This project Involved <br />relocation of numerous electrical, telephone, cable and gas utility facilities, and reinforcement of the underground vault for the pressure <br />reducing station. <br />HUITEZOLVA <br />�'.RELEVANT 'I)ESI G N - <br />COMPONE ET.Si <br />Road'Widehing <br />Right-lofrfti, <br />fi�alrld's I ! . 004 <br />Sto firilrotain � <br />4kWo'kstriolog <br />' &sikn, Geomattics & PUE <br />ka0dmqn't-Re�dbdZt4t1on & Overlay <br />�"fio'hs <br />'Traffic Contr tion, Phasing <br />City of Santa Ana Civil Engineering Sorvices� RFP 17-083 12 <br />25E-236 <br />