25F - AGMT - DELHI DIVERSION PROJECT

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Preliminary Design Report Addendum No.2 possible, a trenchless method of construction will be used to cross major intersections to minimize lane closures along the route. Right of Way Availability Route 1 utilizes existing rights -of -way along the majority of the route. The following properties will need permanent construction easements acquired from private landowners: • Newport Beach Golf Course, 20 feet wide by 250 feet long • 20321 -20371 Irvine Avenue, 20 feet wide by 400 feet long (this study consider existing sanitary easement per OC parcel map no. 89 -128) • 2765 Newport Blvd, 20 feet wide by 50 feet long Operation and Maintenance This section will be addressed at the completion of the hydraulic calculations of the preferred alternative routes. Special Construction Trenchless construction techniques will be used for all pipeline crossings of major highways to avoid disruption in vehicular traffic. Route 1 contains three crossings, which will require special coordination and involvement with the applicable agencies. • Delhi Channel (HDD), 300 feet, 30 feet deep • Newport Beach Golf Course, continue through 2031 Irvin Avenue. (HDD), 600 feet, 10 feet deep • Santa Ana Avenue (jack and bore), 150 feet, 10 feet deep • Newport Blvd (HDD), 500 feet, 40 feet deep Directional Drilling, and Jack and bore construction will be used to accomplish these major highway crossings. Additional information regarding the estimated cost of special construction is located in Exhibit B. Route 2 The limits of Route 2 are similar to Route 1, beginning at the proposed Delhi Channel Diversion Facility Pump Station and ending with the pipeline connection to the existing OCSD's 27" diameter trunk main through an existing manhole at the east side of Fairview Road near Fair Drive intersection. This route begins at the proposed diversion facility location and proceeds west to cross under the Delhi Channel and continues southwest along the Delhi Channel within the Newport Beach Golf Course. The route continues to northeast to Orchard Drive ROW then crossing to Santa Ana Avenue ROW. The route continues south within the Santa Ana Avenue ROW to Mesa Drive, then continues west within the Mesa Drive ROW, crossing Santa Ana Avenue to Newport Boulevard ROW, and then crossing Newport Boulevard through the bridge's existing utility crossing structures, and continues west to Fair Drive ROW and ends at an existing manhole east of Fairview Road. URS 20 25F -152