The governing board of Southern California's largest water wholesaler voted Tuesday to spend billions more dollars on a water-delivery tunnel project, despite objections by Los Angeles' representatives on the board and concerns it will sharply raise residents' water rates.The California WaterFix project is designed to divert water from the Sacramento River as it enters the Sacramento-San Joaquin Delta and carry it to existing federal and state pumping stations in the southern part of the delta through one or two 35-mile tunnels.In the face of statewide funding shortfalls for the $17