Newcomer Mark Jewett and incumbent Greg Marvel are the apparent winners of two seats on the San Ramon Valley school board.

With almost all election precincts reporting, Jewett had 38.97 percent of the vote, and Marvel had 37.08 percent. Dwight Winn came in third.

Despite Marvel and Jewett's top numbers, not all votes have been counted. The Contra Costa County registrar of voters on Tuesday estimated that up to 20 percent of votes remain to be counted -- mailed-in ballots and mail-in ballots that were dropped off at polling places on Tuesday.

Marvel is the current board president and has served as a trustee since 2000. Certified public accountant Mark Jewett and retired businessman Dwight Winn Sr. were the newcomers in a cordial campaign in which all three candidates were in agreement on nearly all the issues.

The San Ramon Valley school district is known for great schools and high test scores, but it is facing a deteriorating budget picture.

If propositions 30 and 38 fail, the district's reserve fund will be depleted in the 2013-14 school year, school officials say, meaning tough decisions will have to be made on increasing class sizes, cutting programs, cutting benefits for teachers and staff and layoffs.

All three candidates are fiscal conservatives who were in agreement that tough choices are going to have to be made if the propositions don't pass. All three support Measure D, a $260 million school facilities bond measure that will fund school modernization projects and upgrades to technology infrastructure.

Contact Jason Sweeney at 925-847-2123. Follow him at Twitter.com/Jason_Sweeney.