California Gov. Jerry Brown's plan to build two 35-mile-long, 40-foot-diameter tunnels to carry water under the Sacramento-San Joaquin Delta involves the reconfiguration and rerouting of three highways. The highway part of the $14 billion Bay Delta Conservation Plan itself would cost about $265 million. In addition to the tunnels and highway work, the project involves constructing new power lines, water storage forebays, electrical substations, habitat restoration, new levees and "hundreds of acres of muck storage areas to hold materials excavated from the tunnels."

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