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Structural Improvements <br />The proposed Santa Ana Boulevard Grade Separation, and the associated retaining walls shall be studied to determine <br />the most cost effective and efficient structural type, and this will include both pre-cast concrete and steel through plate <br />girder alternatives. The crossing will also be studied in terms of providing an aesthetic bridge structure. <br />Applicable Standards <br />The PSRE shall be prepared similar to CALTRANS' regulations, policies, procedures, manuals and standards. The <br />following items a. through d. are not all-inclusive but are intended only to illustrate types of sources. <br />a. The PSRE will be prepared similar to Caltrans' Project Development Procedures Manual Appendix L - <br />Preparation Guidelines for Project Study Report. <br />b. Roadway design shall be in general conformance with the current CALTRANS Highway Design Manual, <br />Standard Plans and Specifications in English Units. <br />c. Plans and estimates shall be prepared in general conformance with the current editions of the CALTRANS <br />Plans, Specifications and Estimates Guide, Standard Plans and Standard Specification, and Basic Engineering <br />Estimating System or as required by the City. <br />d. This PSRE shall be performed in accordance with CALTRANS and AASHTO standards and practices. Any <br />exceptions to applicable design standards shall be approved by the City via the process outlined in <br />CALTRANS' Highway Design Manual and appropriate memorandums and design bulletins published by <br />CALTRANS. <br />The PRE shall be in accordance with CALTRANS' regulations, policies, procedures, manuals and standards. The <br />following items a. through d. are not all-inclusive but are intended only to illustrate types of sources. <br />a. The PRE will be prepared in accordance with Caltrans' Project Development Procedures Manual Appendix K - <br />Preparation Guidelines for Project Report. <br />b. Roadway design shall be in conformance with the current CALTRANS Highway Design Manual, Standard <br />Plans and Specifications in United States Customary Units. <br />c. Plans and estimates shall be prepared in conformance with the current editions of the CALTRANS Plans, <br />Specifications and Estimates Guide, Standard Plans and Standard Specification, and Basic Engineering <br />Estimating System, or as required by the City. <br />d. This PRE shall be performed in accordance with CALTRANS and AASHTO standards and practices. Any <br />exceptions to applicable design standards shall be approved by the City and Caltrans via the process outlined <br />in the CALTRANS' Highway Design Manual and appropriate memorandum and design bulletins published by <br />CALTRANS. <br />Project Understanding <br />We will obtain Project Approval and Environmental Clearance for the Santa Ana Boulevard Grade Separation Project, <br />and this shall be done by preparing a PSRE, a PRE, a Statutory Exemption (SE), and Categorical Exclusion (CE). <br />We will prepare and obtain approval from the City, the SCRRA/OCTA, Caltrans, and the Federal Highway <br />Administration (FHWA). The PRE will examine roadway alternatives documented in the approved PSRE, based upon <br />forecast traffic volumes, and existing topography, as well as alternatives for the crossing type, and shall recommend a <br />preferred alternative, as well as the approval of the environmental document. <br />We will establish relationships with all the stakeholders in the project to solicit input and develop consensus during the <br />project development process. Input from all stakeholders will be solicited early in the process and will continue <br />throughout project development to facilitate timely review and approval of the project. <br />Cit_v ofSanta Ana <br />25B-21