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6.3.C. - Page 64 <br />Task 2.6 Design Reports <br />AECOM will prepare Design Reports for highways and structures, and provide all design <br />interface information to the other design consultants for preparation of these reports. The reports <br />will utilize applicable existing information, including information generated from the PA&ED <br />phase. The submittals will contain sufficient design calculations and infonnation based on <br />currently available Caltrans' design criteria. <br />AECOM and/or their Subconsultant(s) will prepare and submit with the following Design <br />Reports, as indicated: <br />1. Hydromoditication Memorandum <br />Due to tidal action at the site, it is assumed that a Hydromodification Report will not be <br />required. A Hydromodification Memo will be prepared to document this. <br />2. Storm Water Data Report <br />AECOM will prepare a 65% PS&E-level Storm Water Data Report summarizing the <br />Project impacts to water quality, general mitigation measures, and recommended Best <br />Management Practices (BMPs) consistent with current Caltrans requirements for PS&E <br />phase. The study will address only the impacts from roadway improvements, utilizing <br />Caltrans standard checklists. The report will also address the need for erosion control <br />measures and document the decision-making process relating to the implementation of <br />Treatment BMP's within the project limits. This will include risk assessment to <br />determine the combined sediment and receiving water risk. The results of this will be <br />used for Task 3.12 Construction General Permit Compliance. <br />3. Drainage Report <br />AECOM will review the available data and prepare design calculations to assess the <br />capacity of the existing drainage systems. The Drainage Report will include design <br />calculations to assess the need for drainage improvements. The results and design <br />recommendations will be summarized in the Drainage Report. <br />The drainage report prepared by AECOM will include the following: <br />• Evaluation of the existing conditions <br />• Unusual and special conditions <br />• Drainage mapping <br />• Hydraulic analysis <br />• Proposed systems <br />Page 20 of 73 <br />REV: 07-18-17 PR <br />ATTY/AGR.2017.166/AECOM 101/84 PS&E <br />