Inter-Agency Intertie Projects
Local water agencies in the Bay Area are improving their ability to sustain adequate water supply after catastrophic events such as earthquakes. After disruptions in regular supply sources or during planned outages of critical systems, temporary supplies from a neighboring utility could help minimize customer curtailments. Two recently constructed interties linking EBMUD with its neighboring water utilities now stand ready for EBMUD to receive or provide water under unusual circumstances, thus enhancing the reliability of supply to more than four million Bay Area water customers.
The EBMUD-Hayward-SFPUC Intertie
In 2002, EBMUD formed a partnership with the San Francisco Public Utilities Commission (SFPUC) and the City of Hayward to construct Skywest Pump Station and 1.5 miles of pipeline to link their systems. These facilities are now completed and can pass up to 30 million gallons of water per day (MGD) among these three agencies to boost water supply reliability when needed. EBMUD and SFPUC own these facilities jointly, while the City of Hayward maintains and operates them in coordination with EBMUD and SFPUC.
In 2007, EBMUD and the Contra Costa Water District (CCWD) completed construction of intertie facilities, including a 170 foot pipeline, linking CCWD’s Los Vaqueros Pipeline with EBMUD’s Mokelumne Aqueduct. These facilities can pass up to 100 MGD from EBMUD to CCWD and up to 60 MGD from CCWD to EBMUD. EBMUD and CCWD each own and maintain their separate portions of the intertie facilities and coordinate operations when needed.
A system map showing the
two interties is available as a PDF file that can be viewed and printed with
Adobe Acrobat Reader, a free software. 
For more information on this project, please contact Eileen White at ewhite@ebmud.com.