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Permanente Creek Flood Protection Project

Current status:
In January 2017, the Santa Clara Valley Water District celebrated the Permanente Creek Flood Protection Project coming to fruition with a ceremonial groundbreaking event. Project leaders and partners from the cities of Mountain View, Los Altos and Cupertino, the County of Santa Clara and Midpeninsula Regional Open Space District commended the multi-agency collaboration and emphasized the importance of essential flood protection improvements to protect the community. View a video from the groundbreaking event.

The project includes four flood protection elements at different parts of Permanente Creek. See below for specific information about the flood detention basins at the county's Rancho San Antonio Park and Mountain View's McKelvey Park and the channel improvements elements.


The Rancho San Antonio detention basin element began construction in January 2017. View all information for this element, including the schedule and what to expect during construction, on the element webpage here:


 The McKelvey Park detention basin element is expected to begin construction in March 2017. View all information for this element, including the schedule and what to expect during construction, on the element webpage here:


The channel improvements, levees and floodwalls elements are expected to begin construction in summer 2017. For more information about the project and what to expect during construction, view the preconstruction mailer  or attend the preconstruction public meeting:    

    Public meeting: Thursday, May 18 from 7-9 p.m.
    Mountain View Senior Center, 266 Escuela Avenue, Mountain View, CA


Brief description:
As part of the water district’s 15-year Clean, Safe Creeks Program, the Permanente Creek Flood Protection Project, located in the cities of Cupertino, Los Altos and Mountain View, has been selected for improvements in flood protection, structural repair, sediment reduction and habitat restoration. The planning and design phases of this project are included as part of the water district’s Capital Improvement Plan.

Project goals:
The project goal is to provide flood protection to homes and businesses in the Permanente Creek watershed using a natural flood protection approach.

  • Provide natural flood protection for approximately 2,200 properties (which exceeds the project requirement of protecting 1,664 properties)
  • Prevent flooding of Middlefield Road and Central Expressway
  • Prevent potential damages in excess of $48 million (1999 value)
  • Enhance 8 acres of wildlife habitat in Rancho San Antonio County Park

Project elements:

  • Floodwalls and levees north of U.S. 101
  • Channel widening and steepening for existing channels along Permanente Creek
  • Flood detention area at City of Mountain View's McKelvey Park
  • Flood detention area at County of Santa Clara's Rancho San Antonio Park

Contact us:

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