Last year - on Sept. 16, to be precise - the state Reclamation Board, a relatively obscure state agency that oversees flood protection levees, approved a potentially far-reaching policy to intercede when local governments and developers propose residential subdivisions behind levees designed to protect farmland. Spurred by the devastation of New Orleans when levees failed during Hurricane Katrina and an appellate court decision declaring the state liable for damages from levee failures in California, the board activated powers that it had long held under state law, but rarely exercised, to review developments behind levees for flood safety. "I believe if...