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Underground Flow Equalization System

UFES Project Update – April 2, 2021

Phase 3 and Pipeline Work for the Clean Water Program’s UFES Project Continue

Since starting in February 2021, Phase 3 construction of the UFES project at the San Mateo County Event Center site has progressed significantly. During this phase, soil from inside the shoring system is being removed, and any water occurring inside the excavation is removed as it is encountered. The ongoing work includes additional equipment, heavier construction, and increased truck traffic for hauling soil from the San Mateo County Event Center to and from Delaware Street. This phase of construction is expected to be complete this summer. Approved work hours at the Event Center site are between 7 a.m. and 7 p.m., Monday through Friday.

Preparations for pipeline work along Saratoga Drive also started in February. Pipe installation will begin this month. While we continually strive to minimize the impacts of our work on our neighbors, you may hear some noise and feel minor vibrations if you are close to where the work is occurring. Approved work hours for work along Saratoga Drive are between 8 a.m. and 4 p.m., Monday through Friday.

Traffic control measures remain in place. The single eastbound lane of Saratoga Drive is being utilized for Event Center traffic only. The single westbound lane of Saratoga Drive allows for through traffic to Delaware Street. Signs are placed in specific areas to provide direction and ensure the safety of drivers.

*Construction schedules and traffic patterns are subject to change.

Stay Connected with the UFES Project

The Clean Water Program’s UFES construction is well underway and we want to keep you informed. The team established multiple information channels for residents and business owners to stay connected.

  • Sign up for construction alerts (text the word UFES to 1-833-321-0231), email us at or call our hotline at 1-650-522-7250.
  • You can also visit our UFES project page to see project details and sign up for our e-newsletter. If you don’t want to opt in, but still want information, bookmark the link where we post our updates to the project website.

The Latest on the County of San Mateo’s Health Orders

As the County of San Mateo’s COVID-19 Health Order continues to evolve, we follow all guidelines and safety instructions to ensure your infrastructure continues to improve during this time. Increased traffic and activity at the San Mateo County Event Center is expected now through the summer. Traffic patterns are expected to change over the coming weeks and could change suddenly. Please follow all directional street-level signage.

For more information about the area traffic congestion, go to: Event Center Traffic | San Mateo, CA – Official Website

We thank you for your continued patience and cooperation as we make steady progress towards completion of this much-needed solution for our aging sewer system.

For more information, and to subscribe to receive UFES project updates as construction progresses, please visit our UFES page. You can also email, or call the UFES hotline at 1-650-522-7250.