25F - AGMT - DELHI DIVERSION PROJECT

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• Regional Water Quality Control Board — Section 401; • Streambed Alternation Agreements - Section 1600; • CEQA; • Caltrans; and • Department of Airports — URS will develop required easement exhibits identifying the requited land easements within the Newport Beach Golf Club (Airport) property. 2.4 Design Criteria Development — In general, all design criteria will be based on The City of Newport Beach Engineering Design Criteria & Standard Plans for Street and Sewer Projects, and Orange County Public Works Standards for channel and flood control related facilities. In areas where special considerations are required, such as crossing the Caltrans Bridge at the Corona del Mar Freeway and Irvine Avenue and areas where Caltrans or the City of Newport Beach may require additional criteria, URS will evaluate the most stringent and /or applicable design criteria for future use. Design criteria findings will be documented and incorporated into the Basis of Design Memorandum for record keeping requirements and future reference. 2.5 Santa Ana Delhi Channel Hydraulics — URS currently has developed preliminary channel hydraulics for the portions of the Santa Ana Delhi hydraulically impacted by the proposed diversion structure. In addition, URS also prepared additional hydraulics reviewing the potential impacts of using an in- channel trash screening system. All previous and future HEC -RAS analyses will be based on the Santa Ana Delhi Channel hydraulic analyses prepared by the Orange County Flood Control District. URS will prepare final HEC -RAS hydraulics analyses for the preferred project alternative HEC -RAS hydraulics for the Santa Ana Delhi Channel from the Mesa Drive Crossing to Santa Ana Avenue inclusive of the 2, 5, 10 and 100 -year storm events that will include both the pre - project condition and the post - project condition. Based on the Santa Ana Delhi Hydraulics analysis, URS will develop general operational parameters of the proposed in- channel screening system including water surface elevations and anticipated Flow rates. 2.6 Low -Flow Pump AnalXsis — URS has already prepared the preliminary hydraulic analysis for the preferred pipeline route 5. URS will finalize the hydraulic analysis of the proposed low pumping system. The hydraulic analysis will include the development of head -loss calculations from the pumps to the proposed outfall along the alternative force main route. 2.7 Initial Geotechnical Considerations — URS will obtain available geotechnical reports associated with the original construction of the Santa Ana Delhi Channel and any geotechnical reports associated with construction within the proposed pipeline rights -of -ways. Based on URS' review of the available documents, a final recommendation as to the final engineering geotechnical study will be provided. URS has included a full geotechnical investigation as required by the City in the Final Engineering Phase of work. If necessary, URS will provide refinements to the original scope of geotechnical services to either exclude un- warranted geotechnical explorations or refine the locations of geotechnical borings. 2.8 Initial Structural Considerations — URS will develop structural requirements for the proposed improvements inclusive of required flood control channel sections, underground vaults and support structures for the proposed screening system. Structural recommendations will be prepared and included into the Basis of Design Memorandum for review by the project stakeholders. All structural recommendations will be based on the Orange County Flood Control loading criteria. 2.9 Initial Electrical Considerations — URS will develop electrical and power requirements based on the proposed pumping and gating control systems. Electrical loads will be developed and provided to Southern California Edison for power service planning purposes. It is anticipated that SCE will prepare a power service plans to be included as part of the final design documents. UM 25F2346