2017-046 - Approving Addendum Nos. 1 and 2

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Santa Ana/Garden Grove Fixed Guideway Project Addendum Cultural Resources A supplemental cultural resources technical analysis was prepared to identify whether any of the proposed design modifications within the Project would affect the previous findings regarding cultural resources (both historic and archaeological) within the previously -approved APE, and the revised APE (see Cultural Resources Update Technical Memorandum, Appendix B). As identified in the EIR, the proposed Project was not expected to have a significant impact on historical resources (including historic architecture) or archaeological resources. However, given the sensitivity of the area for archaeological resources, archaeological monitoring would be conducted for earth -disturbing activities that could encounter previously undisturbed soils perthe Mitigation Monitoring and Reporting Program (MMRP) adopted as part of the EIR. The proposed design modifications would expand the previously -identified APE associated with cultural resources. The 2015 EIR APE was originally created to take into consideration both archaeology and architectural resources, encompassing the maximum footprint for construction, ground -disturbance and grading, and generally extended one parcel past the limits of the above -ground Project improvements, and/or direct impacts for the TPSS sites, gated crossings, tree removal areas, maintenance facilities, transit structures, raised medians, staging areas, property acquisitions, and ROW impacts. The APE also included previously recorded cultural resources located adjacent to the above -ground Project improvements and direct impact areas. In addition, the APE included parcels adjacent to the proposed Project footprint as part of the architectural history field surveys for properties that may be potentially indirectly affected by visual, audible, or atmospheric intrusions, shadow effects, vibrations from construction activities, or change in access or use. These areas of the APE would not be physically demolished, destroyed, relocated/removed, materially altered, or impacted from neglect or deterioration as a result of the Project. As part of the supplemental cultural resources analysis (Appendix B), the original Project APE was compared to the design modifications, and a revised and expanded APE was developed to address the modifications. The revised APE encompasses the original 2015 APE and was expanded in areas to accommodate design modifications identified in Table 1, primarily to include the relocation of TPSS, areas of ground disturbance due to utility relocations and storm drain improvements, adjustments to platforms, station stops, and rail lines, and the location of the bridge over the Santa Ana River. The APE maps include the locations of historic properties. In keeping with the previous methodology, both direct and indirect effects were taken into account when revising the APE and include areas where the streetcar and its Project components will be visible and/or where there may be effects due to audible or atmospheric impacts or vibration impacts from construction. Additionally, an updated records search was conducted with the South Central Coastal Information Center to ensure that all recently recorded cultural resources in the expanded APE were taken into account in the supplemental cultural resources study. Based on the results of the records search, there are no newly identified historic properties located within the expanded 2016 APE as compared to the 2015 APE. A reconnaissance -level field survey was conducted in May 2016 to photograph and document the expanded areas of the revised APE. As noted in the 2014 survey and evaluation, there are several historic properties located with the 2015 APE. The proposed modifications and the expanded APE include the historic properties identified in Table 2 of the supplemental cultural resources analysis (Appendix B). There are no known archaeological or paleontological resources eligible for listing in the National Register of Historic Places (NRHP) located within the original or expanded APE. The expanded APE does not include any known archaeological or paleontological resources eligible for or listed in the NRHP. Ground disturbance would not be more than five feet beneath the existing surface in most areas. The deepest excavations would be 12-20 feet deep (likely a 36 -inch diameter boring) to accommodate OCS pole foundations, depending on soil conditions which will be determined through a geotechnical investigation. Although the APE has already been subject to extensive disruption from previous development and may contain artificial fill 7 I age 1170726.1