By Rachel Becker | CalMatters California’s contentious and long-debated plan to replumb the Sacramento-San Joaquin Delta and pump more water south finally has a price tag: about $20 billion. The new estimate for the Delta tunnel project — which would transform the massive water system that sends Northern California water south to farms and cities — is $4 billion higher than a 2020 estimate, largely because of inflation. Included is almost $1.2 billion to offset local harms and environmental