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SECOND BERNAL BRIDGE AT ARROYO DE LA LAGUNA SCOPE OF WORK Date:December 18,2017 Task 1.3—Preliminary / Base Engineering Design Task 1.3.1—Structure Alignment Alternatives Development[BC.\,BKFI Although the City had initially identified the following two basic crossing alternatives with associated variations in the RFP,the City wants to evaluate the structure alignment development on alternative 2).The structure alignment development effort will evaluate the overall,financial and scheduling impacts with this crossing alternative. 1) Construct a new bridge for both EB and\XB vehicular traffic. la) Convert the existing bridge to a pedestrian/bikeway only bridge. lb) Relocate the existing bridge to another location for pedestrian/bicycle only use. 2) Construct a new bridge for EB traffic and use the existing bridge for WB traffic with pedestrians and bicycle traffic on both bridges. Consultant will evaluate Alternative 2) as indicated above to minimize project costs.The Consultant will consider the recent extenuating circumstances of channel damage from the recent 2017 storm events,potential for future storm damage prior to completion of the project and associated project cost increases,as well as the City's limited project budget and timing impacts of the other alternative funding sources. Consultant will prepare preliminary plan-line level geometries for the roadways,pedestrian,and bicycle trails for this structure alignment alternative. Geometries shall include horizontal,including retaining wall locations,and rough cut/fill limits. Consultant will prepare geometries layout and define the improvements in sufficient detail to obtain agency consensus that will be discussed in the feasibility study. Using the preliminary plan-line level geometries,Consultant will develop Preliminary Base Plans for the proposed bridge and approach roadway alternative consisting of base layout sheets.These Preliminary Base Plans will incorporate contour topography integrated from the aerial topography and will be sufficiently extended to approximate current channel topography conditions and transitions from the existing conditions to the proposed improvements such as the existing bridge structure,edge of pavement,right-of-way(ROW),adjacent property lines, and assessor's parcel numbers and owners'information. Task 1.3.2—Bridge Advanced Planning Study(APS)/ 15%Conceptual Plans and Estimate [BCA] Advance Planning Study (APS) level drawings of the structure will be developed for the evaluated alternative.Prior to development of the APS level drawings,Consultant will hold a workshop with the City to review the gathered project alternative information to confirm the alternative direction and kick-off the APS level drawings effort. These planning level structure drawings will include sufficient detail to depict the alternative project concept and will be used to coordinate with the City and 3rd party stakeholders to gain consensus on an acceptable project approach. Consultant will prepare a planning level conceptual construction cost estimate of the structural alternative and coordinate input for the project related to civil improvements. Task 1.3.3—Feasibility Summary Memorandum [BCA,BKFI Consultant will provide a text write-up of the Preliminary/Base Engineering Design information for the Feasibility Summary Memorandum.The memorandum will summarize the project constraints,considerations,and requirements,outline the project's focus and purpose including providing an assessment of the project's feasibility, and recommendation of the project's plan and direction. Input will consist of key points to enable an informed decision to be made by the City to proceed toward project approval for continuation of design into the subsequent 35%Type Selection and Final PS&E design phases. Deliverables; Task 1.3—Preliminary/Base Engineering Design: ✓ Preliminary Base Plans and Exhibits for Structure Alignment Alternative ✓ Advance Planning Study (APS) level General Plans of the Structure Alternative ✓ Planning Level Conceptual Construction Cost Estimates of the Structure Alternative ✓ Feasibility Summary Memorandum 3