In an average year, California diverts more than 50% of the Central Valley river flows BEFORE they reach the San Francisco Bay. In dry years, that number rises to over 70%.
Data collected over the past century demonstrates how this significant reduction has already harmed the Bay-Delta ecosystem. The proposed Delta Tunnel, also known as the Delta Conveyance Project, would further decrease freshwater flows and accelerate long-term damage. Case-in-Chief testimony from Science Director Dr. Jon Rosenfield highlights the science and expert analysis that reveal the tunnel’s devastating impacts. Our team continues to oppose this destructive project through legal challenges alongside partners like San Francisco Baykeeper.
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