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Underground Flow Equalization System

UFES Project Update – March 25, 2022

UFES Project Reaches New Milestones

The UFES project continues to reach important construction milestones: Phase 4, which included foundation pile drilling and installation at the San Mateo County Event Center Site, is complete.

Phase 5 is now well underway, and includes installation of the concrete base, walls, columns, beams, and top slab of the UFES structure at the San Mateo County Event Center site.

As of March 23, 2022, over 2,500 cubic yards of concrete have been poured in the excavation at the Event Center Site. Mechanical and electrical equipment and the new electrical building will be installed as part of Phase 5 as well.

Approved work hours at the Event Center site are between 7 a.m. and 7 p.m. Monday through Friday. Increased truck traffic will continue to and from South Delaware Street.

Pipeline installation work continues along Saratoga Drive and is now underway along South Delaware Street. Approved work hours along South Delaware Street are between 8 a.m. and 5 p.m. Approved work hours for Saratoga Drive are between 7 a.m. and 5 p.m. Monday through Friday.

Traffic control measures remain in place. Signs are placed in specific areas to provide direction and ensure the safety of drivers.

*Construction schedules and traffic patterns are subject to change.

UFES project (looking northwest) preparing for the next concrete pour, March 18, 2022
UFES project (looking northwest) preparing for the next concrete pour, March 18, 2022

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.