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Exhibit A <br /> Continued <br /> Assumptions <br /> • The dike repairs under 1-5 are assumed to be bid separately from the repairs downstream of 1-5, <br /> and therefore a separate set of contract documents will be prepared for the repairs under 1-5. <br /> 8.4 Engineer's Estimate for Repair Under 1-5 (90% and 100%) <br /> Otak will prepare the cost estimate to indicate quantity estimates and unit construction cost data to <br /> reflect the 90% level design. Quantities will be organized into standard bid items (supplemented by <br /> additional non-standard items, if necessary)conforming to the project bid schedule. Otak will estimate <br /> quantities and develop an itemized construction cost estimate using unit costs based on experience <br /> and recent similar project bid tabs.The construction cost estimate will include appropriate <br /> contingencies to reflect the level of design complete. <br /> Deliverables <br /> • 90% Engineer's Estimate, electronic file (PDF file format). <br /> • 100% Engineer's Estimate, electronic file(PDF file format). <br /> 8.5 Supplemental Geotechnical Design for Repair Under 1-5 (Cornforth <br /> Consultants) <br /> The scope for this task is described in Attachment A. <br /> Task 9 - Dike Repair East of 1-5 Final Design <br /> 9.1 Supplemental Survey for Upstream Dike <br /> Additional survey will be collected to support design of the repairs for the dike reach east of 1-5 to the <br /> County's setback dike. The areas identified for survey are those areas where repairs were identified <br /> from the existing dike evaluation in Phase 1, and where the available LiDAR data is considered to not <br /> adequate to represent the topography. <br /> This survey will utilize GPS real-time kinematic(RTK)equipment, and/or conventional total station <br /> instruments. This field survey data will be incorporated into the project base map sufficient for <br /> construction documents. <br /> Deliverables <br /> • Site survey base map stamped by Professional Land Surveyor, registered in the State of <br /> Washington. <br /> ■ The base map will show 2-foot contour intervals with elevations referenced to the North American <br /> Vertical Datum 1988 (NAVD88). <br /> • The map will be referenced to the Washington State Plane Coordinate System. <br /> • AutoCAD/CIV3D base map drawing (*.dwg)file of project survey with topographic(digital terrain <br /> model—DTM)surface of surveyed area. <br /> Assumptions <br /> • Access and rights-of-entry will be provided by the City and DD5. <br /> • Supplemental Survey will be limited to the areas identified for repair, and where LiDAR data is <br /> determined to be inadequate based on the existing dike evaluation in Phase 1. <br /> 005 Dike Repairs and Improvements Project 5 <br /> n otak <br /> K\project\32700\32758\Contract\Preporal 19_0317\Scope for Phare 2-DD5 dike repMUnder1-5 and East oft-5 19_1014.docx <br />