Blog: New $15.9b Delta tunnel cost estimate: Revisiting DWR’s 2018 analysis with updated costs shows it is a bad investment
Simply updating costs to this latest estimate ($15.9 billion in 2020 dollars is equivalent to $15 billion in the 2017$) reduces the benefit-cost ratio for State Water Project urban agencies from 1.23 to 0.92, and for agricultural agencies from 1.17 to 0.87. That’s a bad investment, but it is actually much worse than that.