The U.S. government today is announcing plans to alter operations of California’s water system, potentially resulting in less water flowing through the Delta into San Francisco Bay and more to cities and San Joaquin Valley farms.

The plan, part of which was announced via a commentary in CalMatters, includes changes that the Bureau of Reclamation, U.S. Fish & Wildlife Service and National Oceanic and Atmospheric Administration say will improve habitat for Chinook salmon and Delta smelt, a tiny fish that is teetering on the verge of extinction in the wild.