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Permanente Creek Flood Protection Project

Current status:
The project is preparing to begin the construction phase. Environmental documents have been completed and certified by the water district's board of directors. The water district has acquired the resource agency permits needed for construction. Please see the Reports & Documents page for copies of all project reports. 


The Rancho San Antonio detention basin element is expected to begin construction in December 2016. View the preconstruction mailer for what to expect during construction. Public meetings were held in November:
  • Thursday, November 10 from 7-9 p.m.
    Quinlan Community Center, Social Room, 10185 North Stelling Road, Cupertino, CA
  • Monday, November 14 from 7-9 p.m.
    Hillview Community Center, Multi-Purpose Room, 97 Hillview Avenue, Los Altos, CA

Missed the meetings?  View the presentation slides (PDF) here.


The McKelvey Park detention basin element is expected to begin construction in January 2017.
  • Wednesday, December 7 from 7-9 p.m.
    St. Joseph School, 1120 Miramonte 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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