 Also, California's main nuclear plant is on one side, now that San Onofre Nuclear Generating Station is out of operation.California Independent System Operator says that an improvement would decrease prices south of the path but increase prices north of it, so it is not economical.The Path, starting from the south, starts at the large Vincent substation close to State Route 14 and Soledad Pass near Acton east of the Santa Clarita Valley.