Sewer and Water Main Design Services, City of Daly City

EKI has been assisting the City of Daly City with its CIP projects design and construction support services since 2023. Our teams have designed several sewer and water mains at challenging locations and with complex issues.

• Evergreen/Winchester/Templeton Sewer Replacement Design:
  Segments of the sanitary sewer in the project area were identified to be at high risk of failure in the City’s 10-Year Wastewater System Master Plan. The system within the project area is principally made of terracotta pipes and brick manholes, which are in poor condition and past their useful life. The pipes range from 14-inch to 21-inch and will be replaced by 18-inch and 21-inch polyvinyl chloride (PVC) pipes. EKI prepared three design submittals corresponding to 60%, 90%, and 100% design. The design of the project is complete and EKI is currently working with the City to publicly bid the project.
• Callan Boulevard Water Main Design:
  Approximately 2,000 feet of existing 6-inch water main located adjacent to Callan Boulevard between Southgate Avenue and Serramonte Boulevard needs to be replaced with a 12-inch water main located within Callan Boulevard, and an existing pressure reducing valve (PRV) station at the intersection of Callan Boulevard and Clarinda Avenue also needs to be replaced and relocated out of the street. EKI has prepared the 60% design, and is currently developing the 90%, and 100% design submittals.
• I-280 Sewer Crossing Project:
  EKI is providing engineering design and construction support services for a proposed new sewer crossing underneath Highway 280, tentatively expected to consist of approximately 800 feet of 30-inch pipe within a 48-inch casing, plus 300 feet of open cut pipe. Due to difficulties with site topography and existing easements, EKI prepared a Preliminary Design Report (PDR) to evaluate the feasibility and cost of alternate piping alignments and provide a recommendation for the apparent best alternative. As a part of the detailed design services, EKI’s team conducted site investigations and prepared the PDR evaluating available options and recommending a preferred alternative. EKI’s tasks also include detailed design documents and bid support and construction support services for the selected alternative.

Outcome

EKI is assisting the City meet its Sewer and Water CIP goals that support economic growth and planning for future population increases through efficient pipe sizing, routing, and material selection for long-term sustainability.