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City of Everett Point Industrial Center (EPIC) Bridge Project – Phase 2 Full Design <br />Page 10 of 43 <br />liquefaction is determined, we will revise our evaluation of the potential for lateral <br />spreading. <br />Revise Slope Stability Analysis:HWA will revise the global slope stability analysis of <br />the steep slopes and abutment walls to identify potential impacts on the Project. The <br />revisions will include updated soil information obtained from the supplemental <br />explorations and update seismic design parameters. Global stability will be evaluated <br />using the limit equilibrium approach under both static and seismic loading conditions. <br />Geoenvironmental Recommendations: HWA group will review the analytical soil tests <br />completed as part of the TS&L study, along with soil and groundwater data acquired <br />during this supplementary environmental exploration program, and provide findings and <br />recommendations for the locations sampled, which will be included in the geotechnical <br />report, with respect to impacts to proposed construction activities. In addition, HWA will <br />utilize the chemical data to assist in the development of geoenvironmental related <br />specification sections. <br />Finalize Soils for Settlement Estimates: HWA will evaluate the subsurface soil <br />conditions and proposed eastern bridge approach geometry and provide settlement <br />estimates. <br />Finalize Eastern Abutment Approach Recommendations:HWA will work with the <br />design team to develop abutment embankment recommendations that address expected <br />settlement concerns. <br />Finalize Bridge Foundation Vertical Capacity: HWA will perform analyses of <br />foundation vertical capacities using accepted drilled shaft estimation methods provided in <br />the AASHTO LRFD Bridge Specifications and the Washington State Department of <br />Transportation (WSDOT) Geotechnical Design Manual (GDM). <br />Finalize Bridge Foundation Lateral Capacity: HWA will finalize bridge foundation <br />lateral parameters. The lateral parameters will be provided in the form of LPILE input <br />parameter tables for drilled shaft foundations. <br />Wing Wall and Abutment Wall Design Recommendations: HWA will provide design <br />recommendations for proposed wing walls and abutment wall structures. <br />Retaining Wall Design Recommendations: HWA will provide design recommendations <br />for retaining walls proposed to achieve required grades at the western end of the Project. <br />Bridge Approach Pavement Design: HWA will provide pavement design <br />recommendations for the two (2) bridge approaches. <br />Illumination Foundation Recommendations: HWA will provide illumination pole <br />foundation recommendations.