South Bay System Authority conveyance system master plan

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The South Bayside System Authority (SBSA) is a joint power authority providing wastewater conveyance, treatment and disposal to four member agencies including the West Bay Sanitary District, City of Redwood City, City of San Carlos and City of Belmont.

Wastewater is received from the member agencies and conveyed to a Regional Wastewater Treatment Facility (WWTP) for treatment and disposal. The conveyance system consists of four remote pump stations and a booster pump station discharging to a common force main, and an Influent Lift Station located at the WWTP.

Over the past two years SBSA has been assessing the current state of its assets and operations and in response has developed a detailed Capital Improvements Program (CIP) that will allow for modernization, automation and reduced energy use of the conveyance and treatment facilities over the next 10 years. This USD340 million program includes 11 CIP projects identified for the conveyance system. These conveyance projects address:

  • Major upgrades to the West Bay Pump Station Booster Pump Station, and Influent Lift Station
  • Replacement of the Redwood City, San Carlos and Belmont Pump Stations
  • Improvements to the flow equalization facilities, if needed
  • Repairs and eventual replacement of the force main pipelines

For an investment of this magnitude and complexity, SBSA recognized the need for an Integrative Master Plan of the Pump Station and Force Main Conveyance System. GHD was hired to provide a fresh look at how SBSA conveys wastewater to its WWTP and to identify the latest technologies and lessons learned from other agencies with similar facilities that could reduce the CIP costs. Specific objectives of the master plan include the following:

  • Ensure that public’s money is invested wisely
  • Develop a systematic approach to implementing the conveyance projects
  • Provide more accurate cost estimates based on conveyance project conceptual designs
  • Reduce the overall carbon footprint of the conveyance system
  • Provide automation of facilities to reduce staffing needs
  • Organize and maintain a Stakeholder Program to keep SBSA and other stakeholders informed of progress and allow for input on key decisions



As the world’s population grows and our standards of living improve so does our need to manage the water in our environment. We need to maximise its application for human well-being and minimise impact on the environment. GHD engineers, scientists and planners can provide sustainable, cost-effective and innovative water solutions.  We assist water utilities and others who provide water services to optimise infrastructure and adapt to environmental changes in ways that balance the needs of our communities. And we enable clients to meet compliance, improve profitability and maintain their commitment to sustainability.

GHD continually expands the boundaries by engaging in research, enhancing existing systems and strategies, evaluating new procedures and transferring technology from other industries into the water industry. We work with our clients through all project stages planning, investigation, design, delivery, operation and renewal.

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