Customers in the Las Virgenes Municipal Water District who have already been hit with a series of annual rate increases could see their bills on the rise again as agencies across the state figure out how to pay for the $17-billion Delta tunnels. The LVMWD board of directors met Sept. 12 to endorse Gov. Jerry Brown’s California WaterFix project that will use a pair of 30-mile-long tunnels in a way that changes the how Northern California water moves through the Sacramento-San Joaquin River Delta and into the state’s Central Valley and points south.