Gov. Jerry Brown’s administration is now trying to jam through a political deal that would enable construction of his $17 billion Delta twin-tunnels project, the biggest public works project in state history, without the approval of the state Legislature, the voters or ratepayers who would be footing the bill. Brown’s state Department of Water Resources suddenly plans to extend State Water Project contracts, with amendments, for another 50 years. Fifty years! That would allow water contractors backing the twin-tunnels project to lock in water contracts for the Delta tunnels project before Brown leaves office at the end of this year.