A plan to restore rivers and salmon habitat is pitting environmentalists against the city of San Francisco. Originating in the Sierra Nevada snowpack, the rivers are diverted to provide water to farms and cities across California. Now, the State Water Resources Control Board has proposed its Bay Delta Plan, which would reinstate 40 percent of the flow to rivers and help the struggling salmon. Critics of the Bay Delta Plan -- including the San Francisco Public Utilities Commission -- say it would lead to mandatory water restrictions and raise the cost of water. Meanwhile, some farmers in the Central Valley say the plan will cost jobs. We'll discuss the latest chapter in California's water wars.