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WPCF Headworks Replacement Project Scope of Work <br />53 <br /> <br />The Intermediate and Final Design submittals will include unsigned Washington State Professional <br /> <br />signed Washington State Professional Engineer seals. <br />The subtasks under each detailed design phase are grouped by discipline and are consistent from <br />phase to phase as shown in the table below. The individual subtasks are associated with discipline <br />specific scopes of work. Subtasks 601, 651, 701, and 751 are all QA/QC activities for the respective <br />phase. <br />The budget proposed for this detailed design phase is based on the sheet list provided in Attachment <br />A: which includes 362 sheets encompassing all engineering disciplines and architectural work. This <br />scope of work was developed prior to the initiation of the project, at which time the configuration and <br />requirements of the headworks facility were not yet defined. See the scope of work section titled <br />Scope of Work Summary and Work Breakdown Structure for a bulleted description of the assumed <br />facility. Following completion of the intermediate design phase, the project team will reassess the <br />scope and budget to reflect the actual headworks facility design requirements. At that time, an <br />amendment will be issued to incorporate revised scope elements based on confirmed design <br />criteria, adjust the project budget to align with the updated scope, and formally include any work <br />previously considered out-of-scope due to initial design uncertainties. <br />OA services, including support during guaranteed maximum price negotiations, will be completed <br />under Phase 150. <br />Phase 600 Preliminary Design <br />Objective: Develop design documents representing the general arrangement of the headworks <br />facility based on the recommendations, decisions, and design criteria established during the <br />Alternatives Analysis and Basis of Design Phases. The preliminary design will be consistent with the <br />conceptual design outlined in the Alternatives Analysis and Basis of Design Reports. Design models <br />and drawings will conform to the project-specific CAD standards and BXP developed under Phase <br />200. This phase includes completion of all major Process, Electrical, and Instrumentation <br />schematics, diagrams, and calculations. This phase also includes developing Civil, Structural and <br />Process Mechanical models of all major process areas. <br />In addition to development of the design drawings, this phase includes the following activities: <br /> Develop control narratives to supplement P&IDs <br /> Develop hydraulic profile calculations for the gravity flow components of the headworks <br />facility <br /> Equipment sizing and refinement of initial equipment selection completed during the basis of <br />design <br /> Develop key project specifications for critical equipment and materials <br /> Develop data sheets and lists for gates, piping, valves and instrumentation <br /> Confirm the equipment, electrical load, and instrumentation lists developed as part of the <br />previous design phase <br /> Prepare a Design Memorandum that describes any changes to the design assumptions and <br />criteria from those documented in the BODR, description of resolved and outstanding issues, <br />and a discussion of any further field work or investigations that may be required to advance <br />to intermediate design.