Brown and Caldwell, Inc. 9/20/2023

PGSF WMVD Storm and Combined Sewer Design Scope of Work 08-25-2023 22 of 41 Category 2: Sensitive information Category 2: For official use only / disclosure permissible by law. • Meeting agendas and minutes • Inputs into contract documents Phase 360 –PGSF Coordination Objective: To coordinate the PGSF site design with the conveyance improvements design. Activities/Approach: • Coordinate monthly and at design milestones with the PGSF site design (treatment) team to identify coordination points and scheduling needs. • Conduct coordination workshops, as needed. Task Assumptions: • 4 conveyance team and site design team workshops, in person, 2 hours in length Everett Responsibilities • Share information that impacts both contracts • Participate in workshops, as needed. Meetings: • BC, virtual, internal monthly and design milestone meetings • 4 in person workshops Work Products: • Inputs for design Phase 370 – Design Milestone Model Confirmation Objective: Confirm design decisions using the hydraulic model as the Design phase progresses. Activities/Approach: This task includes the following activities: • Update the hydraulic model with final diameter, alignment, material, invert elevations, and operational decisions at 30%, 60% and 90% Design to confirm system performance. • Characterize system performance (hydraulic gradelines, overflows, operational impacts, etc.). Identify any changes from previous design milestone. Document any recommended design changes for next design phase. • Lead consultant team meeting to discuss modeling findings and decide on design direction per impacts. • Documentation of findings and design recommendations and design decisions in 1-page brief memo per design milestone (30%, 60%, and 90%). Task Assumptions • Hydraulic model and modeling methodology is the same as Phase 240 modeling. Everett Responsibilities • Comments on design memos Meetings • 3 consultant team meetings