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Lower Berryessa Creek Flood Protection Project

About This Project

Valley Water is dedicated to keeping residents and businesses safe through its flood protection programs. The Lower Berryessa Creek Flood Protection Project will provide 100-year flood protection to approximately 1,820 homes, schools and businesses in Milpitas.

When complete, the Lower Berryessa Creek Flood Protection Project will provide new floodwalls, improved levees, and widened creek channels to accommodate high flows. This is in addition to enhanced and enlarged tidal and freshwater wetlands and riparian habitat.

The Lower Calera Creek Flood Protection Project is considered part of the larger collection of flood protection improvements under the Lower Berryessa Creek Flood Protection Project.

Lower Berryessa Creek Phase 2 construction
Datapoints
2,447
Parcels will be protected by the completion of the Berryessa Creek Flood Protection Project
1,823
Parcels will be protected by the completion of the Lower Berryessa Creek Flood Protection Project
1.7
Miles of improvements along Lower Berryessa Creek
2.1
Miles of improvements along Calera and Tularcitos creeks
News and UpdatesNews and Updates
Reports and DocumentsReports and Documents
Environmental and Community BenefitsEnvironmental and Community Benefits
History and BackgroundHistory and Background
News & Updates

Phase 2 is mostly completed with some remediation work to be completed by the end of 2019. Construction on the Lower Calera Creek segment of the project is expected to begin fall 2019 or spring 2020 and will last for two years. [Update: July 2019]

For more information:

  • Contact Public Information Representative Albert Le at (408) 630-2860 or by email at [email protected].
  • Use “Access Valley Water” to submit questions, complains or compliments directly from your computer to a water district staff person who can help you. Click on the "Projects or work going on in my neighborhood" tab and select "Berryessa Creek (Lower) flood protection project - Lower Penitencia Creek to Calaveras Blvd."
  • Sign up to receive project updates via email.
Environmental & Community Benefits

The Santa Clara Valley Water District's Berryessa Creek Flood Protection Project, when completed, will protect 2,447 parcels in Milpitas from the threat of a 100-year flood event, which has a 1-in-100 chance of occurring in any given year. The Berryessa Creek Flood Protection Project includes both the Upper Berryessa Creek portion and the Lower Berryessa Creek portion.

The Lower Berryessa Creek portion of the project, which includes Calera and Tularcitos creeks, will protect 1,823 properties in Milpitas, between Milpitas High School and E. Calaveras Boulevard (north to south) and the Union Pacific Railroad to Highway 680 (east to west).

History & Background

The Lower Berryessa Creek Flood Protection Project extends approximately 1.7 miles through the city of Milpitas, from its confluence with Lower Penitencia Creek, south to Calaveras Boulevard. The project also includes about 2.1 miles of Calera and Tularcitos creeks. These two smaller creeks are tributaries to Berryessa Creek and must also be modified to prevent water from overflowing their banks. When complete, this project will protect vast portions of the City of Milpitas from flood events. 

Phase 1 - Completed

This phase stretches along Lower Berryessa Creek, from the confluence at Lower Penitencia Creek to Abel Street. The construction of Phase 1 was completed in December 2016. On the east and north sides of the creek, the flood protection improvements included earthen levees. On the west and south sides of the creek, they included concrete floodwalls. Revegetation of freshwater wetlands was also established within the creek channel.

Completed floodwall and levee near Gill Memorial Park in Milpitas

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Phase 2 - Levee remediation in construction summer 2019. Lower Calera Creek to begin fall 2019 or spring 2020.

This phase has two segments and progress will continue this summer. The first segment of Phase 2 is along Lower Berryessa Creek, stretching from Abel Street to Calaveras Boulevard. The flood protection improvements for this segment includes improved earthen levees on the north side of the creek and concrete floodwalls on the south side of the creek. A riparian habitat area was also included within the creek channel. Major construction activities were
completed in 2018, but construction crews have returned this summer to perform levee remediation work. The second segment of Phase 2 is along Lower Calera Creek, stretching from the Lower Berryessa Creek confluence to Milpitas High School. The flood improvements for this segment include a raised U-frame channel and concrete floodwalls on both banks of the creek. In addition to these flood protection improvements, wetlands with native vegetation will be created within the Lower Calera Creek channel.

Typical cross section of Phase 2 channel improvements (facing south)

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Phase 3 - Planning

Phase 3 of this project stretches along Upper Calera Creek and Tularcitos Creek. The flood risk reduction options for this phase are currently being studied, and the potential funding sources are in the process of being identified. Once this planning phase is completed, Valley Water will obtain the necessary permitting from regulatory agencies before starting construction on Phase 3.

For more information:

  • Contact Public Information Representative Albert Le at (408) 630-2860 or by email at [email protected].
  • Use “Access Valley Water” to submit questions, complains or compliments directly from your computer to a water district staff person who can help you. Click on the "Projects or work going on in my neighborhood" tab and select "Berryessa Creek (lower) flood protection project - Lower Penitencia Creek to Calaveras Blvd."
  • Sign up to receive project updates via email.
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