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Permanente Creek Flood Protection Project

Current status:
The project is currently in the final portions of the design phase. Environmental documents have been completed and certified by the water district's board of directors. The water district has applied for resources agency permits needed for construction. Please see the Reports & Documents page for copies of all project reports. 

Brief description:
As part of the 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, erosion control, structural repair, sediment reduction, and habitat restoration. The planning and design phases of this project are included as part of the district’s Capital Improvement Plan.

Project goals:
The project goal is to provide flood protection to homes, streets, businesses, and public facilities in the Permanente Creek watershed using Natural Flood Protection approach.

  • Develop a plan for the entire watershed that presents alternatives and a recommendation for providing flood protection for all flows up to the one-percent flood for Permanente Creek, Hale Creek, and the Permanente Diversion between Foothill Expressway and San Francisco Bay.
  • Identify opportunities for environmental enhancement such as stream restoration, as well as trails, parks, and open space for the Board consideration.
  • Provide flood protection to 1,664 parcels (1,378 homes, 160 businesses and 4 schools/institutions) downstream of El Camino Real from a 100-year flood (saving potential damages in excess of $47.9 million) by 12/30/2016.
  • Prevent flooding of Middlefield Road and Central Expressway by 12/30/2016.
  • Minimize the cost for maintenance.

Project elements:

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

Contact us:

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