Brown and Caldwell Inc. 3/9/2022 Amendment 1

Exhibit A: Scope of Work,Amendment 1 City of Everett Contract No. 156839 Water Filtration Plant Portal 4 Improvements Design Contract Scope of Services Everett Water Filtration Plant Portal 4 Improvements Design Amendment 1 Project Understanding The City of Everett Water Filtration Plant (WFP) is located adjacent to Lake Chaplain approximately 16 miles east of Everett, WA. The WFP provides water for over 600,000 people, which is approximately 75% of the population of Snohomish County. This critical piece of infrastructure supports the water supply in the north Puget Sound area and its continued operation is vital for the wellbeing of area residents and the economy of the City of Everett. The improvements included in this project are as originally identified in the update WFP Facility Plan and CIP. The project deliverables will include a Basis of Design Report and subsequent Construction Documents depicting Portal 4 improvements that meets WAC 246-290.This scope of work has been updated through Amendment 1 to include the addition of valves and vaults on transmission lines 2, 3, and 4, a security fence around the Portal 4 structure, replacement of the single phase cable servicing Portal 4, and cost estimating conducted during basis of design. This updated scope of work extends the existing Portal 4 Improvements design contract with Brown and Caldwell to include a cost estimate completed in the basis of design phase, additional preliminary and intermediate design for CIP additions, final design, subconsultant services for surveying, geotechnical work, and condition inspection, bid period support, services during construction, additional project management, additional quality control on added deliverables, and an allowance for unanticipated services. Amendment 1 additions to the original scope of work are identified in this exhibit by underlined text. Scope of Work Summary and Work Breakdown Structure The Consultant scope of work for the Project includes 13 tasks, which are identified in the following table. The table includes 4 new tasks to support the final stages of design and project construction. Portal 4 Improvements Design Tasks Task 101 Project Management Task 102 Quality Assurance and Control Task 200 North Corridor Flow Controls Evaluation Task 300 Basis of Design Task 400 Preliminary and Intermediate Design Task 450 Isolation Valves and Security Fence Preliminary and Intermediate Design Task 500 Detailed Design Task 601 Geotechnical Services Task 602 Geotechnical Services During Construction