California Forum

The Conversation

Cost of Delta tunnels doesn’t add up

After yet another revision, the governor’s plan to build twin tunnels through the Sacramento-San Joaquin Delta still makes no economic sense. A closer look at the three types of economic benefits claimed for the project to export water to Central Valley farms and Southern California cities shows why it can’t possibly justify its estimated $15 billion cost. In each case, I give a value derived directly from the optimistic estimates of the state’s consultants and a more intuitive comparison.

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