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proposed developments and the recommendations for mitigation <br />measures to reduce the impacts to acceptable levels. TMP analysis <br />shall facilitate ingress and egress access points during the <br />construction. <br />8. Structure Design -The Consultant shall be fully responsible for final <br />subsurface investigations, laboratory testing, geotechnical analysis and <br />foundation recommendations for the selection and design of <br />foundations of all structures. This task involves the following elements: <br />a. Bridge Site Data Submittal (BSDS) -The Consultant shall <br />collect all pertinent information about the existing site conditions, <br />planned geometrics, scope of structure work, design and <br />construction constraints, and any other factors on which <br />structure designs are based to prepare the BSDS forms and <br />associated attachments for approval by Caltrans and the Cities <br />of Santa Ana and Irvine. <br />b. Bridge Design -The overcrossing bridge shall be designed in <br />accordance with Caltrans Bridge Memos to Designers, Caltrans <br />Bridge Design Practice, Caltrans Seismic Design Criteria and <br />Caltrans Bridge Design Aids manuals and approved by <br />Caltrans. Other tasks include: <br />Develop a seismic model of the proposed structure to <br />analyze the seismic displacement demands and the <br />displacement capacities of the substructure in order to <br />determine the size and number of required columns for <br />adequate seismic resistance of the structure. <br />ii. Prepare the bridge general plan. <br />iii. An independent bridge design check shall be performed <br />by a California registered civil engineer registered in <br />California with a specialty in bridge design. The <br />independent check shall include a review of design <br />calculations, bridge design details, bridge special <br />provisions and bridge quantity calculations. <br />iv. Obtain approval of the Structure Type Selection report for <br />the overcrossing bridge from Caltrans and the Cities of <br />Santa Ana and Irvine. <br />c. Retaining Wall Design -Retaining walls shall be designed per <br />Caltrans standards. <br />d. Soundwall Design -The EIR/EA and PR recommended noise <br />barrier to be provided at the property line of a private residence <br />to achieve Caltrans / FHWA Protocol of reducing a minimum of <br />five (5) decibels. The Consultant shall prepare the Noise Study <br />14 <br />25D-40 <br />