 Home to 400 species of birds and a major stopping point along the Pacific Flyway, California's largest lake—the Salton Sea—is in peril.Under the nation's largest ag-to-urban water conservation transfer agreement (called the Quantification Settlement Agreement, a series of pacts between California water districts to help California live within its 4.4 million acre-foot entitlement right of Colorado River water), since 2003 water has been, and continues to be, released to the Salton Sea to mitigate negative environmental impacts.But the agreement calls for this for the first 15 years of the water transfer.