This article from the Bee reports that a peripheral canal could be built without legislative or voter approval as it is already authorized.
An excerpt.
“A panel of state leaders is calling for California to begin building a canal to divert water around the Delta by 2011, without approval from lawmakers or voters.
“The final report released late Friday by the Delta Vision Committee, made up of five state Cabinet secretaries, thrusts the controversial canal into the top tier of California political battles.
“The canal would divert a portion of the Sacramento River around the Delta in order to protect a freshwater supply serving 25 million Californians from earthquakes, floods and sea level rise. It is a modern-day version of the peripheral canal rejected by voters in 1982.
“Natural Resources Secretary Mike Chrisman, chairman of the committee, asserts that the state has the authority under existing laws to build the canal. The price tag is at least $15 billion, and many water agencies that would benefit have said they would pay the bill.
"We think it's a reasonable goal to set," Chrisman said of the 2011 construction target. "We don't need the Legislature to do that. We already have that authority. Some members of the Legislature don't agree."