Exhibit_B_-_128th_Street_East_Comprehensive_Setback_Levee_Feasibility_Study_(May_2023).pdf

This exhibit is a feasibility study document prepared for Pierce County Planning and Public Works, Surface Water Management Division, regarding setback levee projects located at 1428 - 128th Street East in Washington. The study evaluates comprehensive setback levee alternatives for three quadrants (Northeast, Southwest, and Northwest) surrounding the specified location. The document provides technical analysis, environmental considerations, and preliminary design concepts necessary to inform the engineering design and delivery strategy that the selected consulting firm will develop. The feasibility study serves as the foundation for the subsequent design phases, including the preparation of preliminary and final plans and specifications (PS&E) at 15%, 30%, 60%, 90%, and 100% completion levels as outlined in the related scope of work.

The feasibility study contains engineering assessments, site analysis, environmental review findings, and conceptual designs that will guide the selected consultant's overall approach to the project. This document establishes the technical baseline and key design considerations that must be incorporated into the consulting firm's design and delivery strategy, which represents the first task under the architecture and engineering services contract. The study informs project feasibility, identifies potential challenges and opportunities for each quadrant, and provides recommendations that will shape the subsequent detailed design development phases for these setback levee projects.