2017-046 - Approving Addendum Nos. 1 and 2

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OCTA I Santa Ana/Garden Grove Fixed Guideway Project FNNoise and Vibration Technical Addendum operational improvements, and are partly derived from value engineering and risk workshops conducted in 2015, as well as design coordination with OCTA's partner cities and stakeholders. The modifications are not anticipated to result in changes to the maintenance plan for the Project. Proposed Minor Modifications/Engineering Refinement The following describes the proposed additional design modifications that are the basis of evaluation in this Addendum. Additionally, Table A provides a listing of design updates, comparing the description of Project features in the EIR, revised description of Project features resulting from design modifications at the 30% design, and additional modifications from the 60% design. Table A. Project Description Comparison of Approved Project (2015 EIR), Modifications (30% Design Revisions - May 2016) and Additional Modifications (60% Design Revisions - December 2016) 2 Project Description Update Approved Project in ID 2015 EIR 30°%o Design - May 2016 60% Desiqn - December 2016 Double -track bridge across the Single-track bridge across Santa Ana River (SAR), north of the 1 the Santa Ana River (SAR) existing historic bridge. No Change south of the existing historic The double -track bridge is the same bridge. distance away from the historic bridge as the single-track bridge. Track shifted to the center of the PE ROW starting from 140 -ft east of SAR Bridge to Track positioned in the Track shifted to the northern side of 5th Street at -grade crossing 2 center of the former Pacific the PE ROW, no private property is resulting in a slight track shift Electric Right -of -Way (PE required. to the southern side of the PE ROW). ROW between 5 Street at - grade crossing and the MSF, no private property is required. Provision of a Santa Ana River At -grade Santa Ana River (SAR) Trail undercrossing at the 3 (SAR) Trail crossing on the West Bank by including an extra No Change West Bank. span on the Santa Ana River (SAR) bridge Streetcar Maximum Speed Streetcar Maximum Speed of 45 Streetcar Maximum 4 of 35 mph in PE ROW mph in PE ROW Operating Speed of 44 mph in PE ROW 5 Willowick Station Stop within No Willowick Station Stop within the No Change. PE ROW. PE ROW. Side platforms at Harbor Blvd., Center platforms at Harbor Blvd., 6 Fairview St. (staggered, Fairview St., and Raiff St., nearside No Change farside), and Raitt St., farside Bristol St. westbound, nearside Ross Bristol St. eastbound, farside St. westbound, stops at Sycamore 2