MANNY CRISOSTOMO Bee file, 2008 The Delta Stewardship Council is charged with developing a plan by 2012 to increase water conservation, restore the Delta ecosystem and bolster the water supply, State leaders on Friday filled the remaining five slots of a new seven-member agency overseeing the Sacramento-San Joaquin Delta, the troubled estuary that has long sparked battles among water users, local residents and environmentalists. Gov.