2017-046 - Approving Addendum Nos. 1 and 2

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+� OCTA ISanta Ana/Garden Grove Streetcar Project J Cultural Resources Technical Nlamo Update adopted bythe Cityof Santa Ana and OCTA The modifications comprise ofphysical and operational improvements, and are partlyderived from value engineering and risk workshops conducted in2015,as well as design coordination with the cities of Santa Ana and Garden Grove. The modifications are notanticipatedto resultin changes to the maintenance plan for the Project. Design Modifications The following provides a description of the proposed minor design modifications that OCTA is proposing in response to advancements in the project's engineering design since the approval of the ENEIR in 2015. Table 1 provides a listing of design updates, comparing the description of projectfeatures in the approved 2015 LPAto the revised description of projectfeatures resulting from minor design modifications. See Appendix Afor current engineering plans and Appendix B for a comparison of the 2015 Approved alignment and the 2016 Minor Design Modifications. Physicallmprovements: The design modifications would result in the following changes to the physical improvements described in the LPA: • Concrete Box Girder bridge instead of Tied -Arch bridge at Westminster Avenue; • A double track bridge instead of a single track bridge across the Santa Ana River (SAR). The position of the bridge would be north instead of south of the existing historic bridge location. • Repositioning the double track alignment, shifting the railroad centerline within the former Pacific Electric right-of-way (PE ROW) from the middle to the north at the approaches to the SAR crossing; • Addition of a bridge span on the west bank of the SAR, behind a existing levee to accommodate an undercrossing for the SAR Trail and Bikeway(and Orange County Flood Control District (OCFCD) maintenance road. The profile of the trail and maintenance road would be modified atthe crossing to facilitate the grade separation; • Deletion of Willowick Station Stop. This station stop is associated with future development. Atthis time there is no development that is accessible to this station stop; • Repositioning of Station Stop side platforms to center platforms at Harbor Boulevard, Fairview Street (both west side), and Raitt Street in the PE ROW segment of the Project alignment; • Repositioning Station Stop westbound platform at Ross Streetfrom farside to nearside, and Station Stop platforms atBroadwayand Main consolidated and moved to farside Sycamore Street; • Placement of single crossovers on bothsides ofthe Maintenance and Storage Facility (MSF) with a revised Iayoutforthe MSF, added crossovers on both sides of downtown couplet, and replaced the tail track beyond the SARTC platform with a double crossover before the SARTC platform; • Restriping Santa Ana Boulevard from Flower Streetto RaittStreetfrom a four -lane to a two-lane street with a raised 4 -ft median; July 8, 2016 1 2