Earthquake and drought risks to the Tri-Valley’s water supply may be mitigated in coming years by increased water storage at the Los Vaqueros Reservoir. The expansion project would also include obtaining access to a second source of San Francisco Bay Delta water through the Contra Costa Water District (CCWD). On Aug. 7, the Zone 7 Water Agency Board of Directors, which manages the area’s water supply, discussed options for participating in the Los Vaqueros Expansion project ahead of agreement negotiations later this month. The board said more data was needed before deciding what form Zone 7’s participation would take. “The bottom line is we’re missing the bottom line,” said Director Kathy Narum.