The lead author in the House of Representatives of a big and controversial California water bill that passed last year is back for more. With a Republican in the White House and the GOP controlling Congress, Rep. David Valadao, R-Calif., said Tuesday that he was hoping to build on last year’s legislation that was loved by farmers and loathed by environmentalists. The bill scales back an ambitious San Joaquin River restoration program, speeds completion of California dam feasibility studies and locks in certain water deliveries to Sacramento Valley irrigation districts, among other things.