Even a single water tunnel burrowed under the California’s Delta would be worth it for urban ratepayers and farmers who would to pay to build and maintain the project, according to an analysis released recently by Gov. Jerry Brown’s administration. The Department of Water Resources commissioned David Sunding, a professor of natural resource economics at UC Berkeley, to conduct a cost-benefit analysis of Brown’s Delta tunnel project. His report concludes that benefits outweigh the costs to ratepayers in every scenario he analyzed under a one-tunnel approach.