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culvert? <br />• What is the ability or lack of ability to prevent debris build up on MTR float system that would interfere with <br />its function? <br />• Can the MTR float system be placed downstream? <br />Otak will prepare a narrative with the schematic plans documenting design criteria, design considerations, <br />constructability issues, and maintenance issues. <br />TASK 6.5 DELIVERABLES <br />• Alternative 1 Schematic Design Plans (draft and final, electronic pdf) <br />• Alternative 1 Schematic Design Narrative for future Phase II Alternatives Analysis Report (draft and final, <br />electronic .docx format) <br />TASK 6.5 ASSUMPTIONS <br />• City will provide one list of consolidated comments on the draft plans and draft report Section. Comments will <br />be addressed and incorporated into the final schematic design plans and final section for inclusion in the <br />future Phase II Alt. Analysis. <br />6.6 Levee Setback Feasibility Assessment <br />6.6.1 Levee Setback South Extension Feasibility Assessment <br />This task will assess the feasibility of excavating and setting back the levee face to the south of the project site <br />and east of public parking. Otak will start by reviewing the agreement in place between the City and the property <br />owner to the south for shared parking lot use. <br />Otak will review LIDAR surface and Tukwila topographic basemap data and assess the potential extents of levee <br />setback slopes or vertical walls that would be required to provide levy protection up to the current levy top height <br />and the future projected levy raising height of approximately 5' additional height to provide flood protection during <br />a 500-yr flood event. <br />The conceptual setback extents will be shown and described on a GIS plan figure, an engineering cross section <br />depicting existing conditions, 100-year and 500-year proposed elevations, and a narrative description of the <br />improvements and constructability issues. The figures and narrative will be provided in a technical section to be <br />added to the future Phase II Alternatives Analysis Report. <br />TASK 6.6.1 DELIVERABLES <br />• Plan and Cross section depicting the Green River, Green River Trail and Public Parking (draft and final, <br />electronic pdf) <br />• Narrative Description of levee setback solution element and constructability issues to be integrated into future <br />Phase II Alternatives Analysis Report (draft and final, electronic .docx format) <br />TASK 6.6.1 ASSUMPTIONS <br />• City will provide one list of consolidated comments on the draft figures and narrative description. Comments <br />will be addressed and incorporated into the final figures and final narrative. <br />6.7 Three Additional Alternative 3 Options E, F, &G (Optimize Alignment) <br />Otak will develop three additional options for the Alternative 3 alignment (Optimized Alignment). The options will <br />be labeled E, F, and G. Conceptual plans and cost estimate will be prepared for each new option in the same <br />Otak — Scope of Work <br />50 <br />