California’s mammoth $17 billion plan to overhaul the West Coast’s largest estuary took another hit Thursday, after state auditors revealed that a combination of skyrocketing costs and shaky oversight plague the contentious water project. In a much-anticipated financial report of the California WaterFix, state auditors said planning costs have ballooned to $280 million and that the state has failed to prove that the project is financially viable going forward. The report also blasted the California Department of Water Resources for violating state law by awarding lucrative contracts to an unqualified firm without a bidding process.