2017-046 - Approving Addendum Nos. 1 and 2

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Minor 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 to 60%. Operational Improvements: Two changes to the Project's operations are proposed as part of the 2017 modifications: 1) Streetcar Maximum Operating Speed has been reduced from 45 to 44 mph in PE ROW. 2) Traffic signal priority at all traffic signals along the route including Main Street, Broadway, and Bristol Street. The TSP extends a green phase or shortens an opposing green phase by as much as 20 seconds. The two operational improvements are minor in nature and do not affect the existing cultural resources findings or necessitate any change to the APE. Physical Improvements: Design modifications would result in the following changes to the physical improvements described in the LPA: 1) Track shifted to the center of the PE ROW starting from 140 -feet east of Santa Ana River (SAR) Bridge to 51 Street at -grade crossing resulting in a slight track shift to the southern side of the PE ROW between 5"' Street at -grade crossing and the MSF. No private property is required and the shift occurs within the existing APE. 2) No change to the number of TPSS or locations, with the exception of TPSS 4 slated to be built on the northeast corner of Santa Ana Boulevard and N. Garfield Street and now proposed to be built on the north side of the parking structure at the Santa Ana Regional Transportation Center (SARTC), adjacent to Santiago Street (Figure 1). The new location of TPSS 4 is within the limits of the previously approved APE. 3) Project footprint modifications and anticipated revised construction limits are also proposed in the advancement of 30% design to 60% design. These include: • Trenching in the public right-of-way (ROW) for drainage improvements and utility connections at West 51 Street; • Paving, striping, signing, curb ramp and driveway approach improvements at: N. Harbor Boulevard (Blvd.), N. Western Avenue (Ave.), N. Forest Street (St.), N. Pacific Ave., N. Hesperian St., N. Bristol St., N. Baker St., N. Spurgeon St., French St., N. Minter St., 41 St., E. Santa Ana Blvd., and Santiago St.; • Temporary Construction Easements (TCE) for a maintenance road turnaround on the east side of the SAR; • Sidewalk paving re -construction at Nova Academy on the corner of Ross Street and 4"' St.; and • Anticipated improvements at the driveway approach to the County of Orange Sherriffs Department Complex on W. Santa Ana Blvd.