California Water Commission: Update on the Central Valley Flood Protection Plan
While considerable progress has been made to improve flood management in the Central Valley, the vast region still faces significant flood risk. … It has been estimated that California needs to spend at least $34 billion to upgrade dams, levees, and other flood management infrastructure. Accomplishing these upgrades within 25 years would mean spending $1.4 billion per year—roughly twice the current level of investment.