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Sunny East flooding

The Sunnyvale East and West Channels were constructed by the Santa Clara Valley Water District in the 1960’s and 1970’s to alleviate the storm drain systems of Sunnyvale and Cupertino during a 10-year storm by directing the overflow through the channels to San Francisco Bay. Since construction of the channels, the project area has experienced flooding during major storm events in 1963, 1968, 1983, 1986 and 1998.

Each winter, thousands of households, businesses and schools in Sunnyvale are susceptible to flooding from the Sunnyvale East and West channels during a major storm. The Sunnyvale East and West Channels were identified initially as separate projects in the Clean, Safe Creeks Plan approved by voters in November 2000. In order to combine efforts and improve efficiency, the Planning Phase of the two projects was performed as a single planning effort.

After the conclusion of the Planning Phase, the design phase was initiated for the Sunnyvale East and West Channels and is being performed as a single design effort. The final design will be complete in spring 2015.

View the project timeline for additional milestones.