California urges tunnel system for delta

The $13-billion project would carry water under the Sacramento-San Joaquin River estuary to southbound aqueducts. Environmental groups assail the plan.State officials Wednesday recommended construction of a $13-billion tunnel system that would carry water under the troubled Sacramento-San Joaquin River Delta to southbound aqueducts, a project that would replumb a perpetual bottleneck in California's vast water delivery network.

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