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Exhibit A- Supplement 1 <br /> Overpass Design—Superstructure and substructure <br /> Perform design of all elements of superstructure and substructures,including deep foundation elements. <br /> From the current SGR,it is anticipated that steel H piles will be utilized for the deep foundations. <br /> Seismic Analysis and Design of Brush College Road over Faries&NS RR. The Seismic Zone for the <br /> overpass has changed from Zone 1 to Zone 2 during updates to the SGR. Both the PH I TSL and the PH I <br /> Geotech report indicated Seismic Performance Zone 1 -Revised SGR calls for Seismic Performance Zone 2. <br /> Bridge design scope was based on SPZ1. This requires additional design and analysis by the structures <br /> group for Zone 2. <br /> 1. 3-D Finite Element modeling of the bridge for Seismic Analysis <br /> 2. Superstructure Analysis and Design-End Cross Frame Design <br /> 3. Superstructure Analysis and Design-Bearing Design <br /> 4. Substructure Design-Abutment design and lateral load analysis and design of piles <br /> 5. Substructure Design-Pier Design and lateral load analysis and design of piles <br /> Additional hours are presented for Phase 11 BCR Structure Design,Plan and Quantity work. <br /> Exclusions from the Bridge and Wall Structural Scope of Work: <br /> In the original scope all approach walls were anticipated to be MSE wall types,and no cast-in-place walls <br /> were anticipated. Design and details for any temporary shoring/support was not part of this scope. MSE <br /> walls—Local and Global stability calculations will be performed by the MSE wall manufacturer. <br /> Extension of the southern limit of the project on BCR now requires design of a cut wall. QEI has been <br /> assigned this PH 11 design and PS&E preparation for this cut wall. Additional hours and QEI subconsultant <br /> cost are presented for this cut wall design and plan preparation work. <br /> Miscellaneous Structure Design <br /> Additional Miscellaneous Structure Designs are required as the project limit extended south to the NS Yard <br /> Viaduct. <br /> Modification to Existing RR Pier to incorporate Single Slope Barrier-Total Wall length-50 Ft <br /> 1. Data Collection <br /> 2. Review of Structural adequacy of existing pier footing <br /> 3. Structural Plans and Specifications -General Plan and Details <br /> 4. Single Slope barrier Details and Bill of Material <br /> Proposed Retaining Wall supporting roadway fill and extend above roadway to serve as single slope barrier- <br /> Total Wall Length- 150 Ft <br /> 1. Geotechnical analysis and recommendations <br /> 2. Proposed Retaining Wall Design <br /> 3. Structural Plans and Specifications -General Plan and Elevation <br /> 4. Structural Plans and Specifications -General Notes and Bill of Material <br /> 5. Structural Plans and Specifications -Wall Plan and Elevation <br /> 6. Structural Plans and Specifications-Wall Cross Sections,Details&Bill of Material <br /> Cast in Place Barrier and Anchorage Slab Design and Details-Total Length 310 Ft-(from north end of <br /> proposed retaining wall to south end of proposed MSE wall along IC RR <br /> 1. Geotechnical analysis and recommendations <br /> 2. Proposed Anchorage Slab Design <br /> 3. Structural Plans and Specifications -General Plan and Elevation <br /> Additional Scope 08-21-20 Ex<A S14 <br />