The stage is set for a November runoff for the right to represent Blackhawk, Diablo and the rest of District 3 on the Contra Costa County Board of Supervisors replacing retiring Supervisor Mary Piepho.
Brentwood City Councilman Steve Barr led the six-candidate race with 28.92% of the vote as of midnight Election Night, with most but not all precincts reporting.
Sitting second with 22.49% of the vote was Diane Burgis, who holds leadership roles on the Friends of the Marsh Creek Watershed and the East Bay Regional Park District's board.
Barr and Burgis would head to a runoff election in November, if the midnight results hold, since no candidate received a majority of votes cast. District 3 includes most of Antioch, Oakley and Brentwood as well as Discovery Bay, Diablo and Blackhawk.
The remaining candidates were Oakley City Councilman Doug Hardcastle (18.65%), Antioch Mayor Wade Harper (15.11%), Antioch City Councilwoman Monica Wilson (8.92%) and Odessa Lefrancois, county health worker and Navy veteran, at 5.68%.
County Supervisor Candace Andersen, who represents the rest of the San Ramon Valley, ran unopposed and received 98.28% of the vote as of midnight Election Night.
In other elections, voters across the Bay Area cast ballots on a proposed $25 million annual parcel tax for 20 years to pay for a San Francisco Bay clean water program.
Measure AA required two-thirds voter approval. The fate of the $12 annual parcel tax for 20 years across the Bay Area was not immediately clear as of midnight Election Night, as voters in all nine Bay Area counties were weighing in.
As of midnight Election Night, the tax was trailing in Contra Costa County, where it had 64.55% support.
The tax, which would automatically expire in 2037, is designed to restore wetlands near the San Francisco Bay. It would produce about $500 million in revenue over 20 years.
State Sen. Steve Glazer (D-Orinda) and Republican challenger Joseph A. Rubay are set to head to a November runoff after the pair finished with the top two vote totals in the three-person primary election to represent the 7th Senatorial District, which includes the San Ramon Valley.
Incumbent Glazer led the way with 55.5% in his bid for a first full term, as of midnight, and Rubay followed with 27.9%. The other challenger, Democrat Guy Moore, was last with 16.7%.
There were only two candidates each in the races for U.S. House of Representatives and State Assembly districts representing the San Ramon Valley, and all three sets of candidates were going to advance to a November runoff regardless of the primary results.
In the 15th Congressional District including San Ramon, two-term Congressman Eric Swalwell (D-Dublin) sat above Republican challenger Danny R. Turner 75.3% to 24.7%.
First-term U.S. Rep. Mark DeSaulnier (D-Concord) led with 73.5% of the vote, ahead of Republican challenger Roger Allen Petersen at 26.5%
Freshman Assemblywoman Catharine Baker (R-San Ramon) led Democrat challenger Cheryl Cook-Kallio, a teacher and former Pleasanton City Council member, 54,4% to 45.6%.
The unofficial election results include early vote-by-mail tallies and totals reported by the precincts as of midnight Election Night. The final election figures will likely change as remaining vote-by-mail ballots, provisional ballots and other qualifying ballots are processed, according to the California Secretary of State.