 By the time the all three lines are visible to Interstate 5, they roughly parallel each other until all three lines, two SCE and one PG&E, terminate at the massive Midway substation in Buttonwillow in the San Joaquin Valley.Two pairs of PG&E 500 kV lines heading north and southwest (separated), form Path 15.Adjacent to the Path 26 wires, two other SCE 500 kV also begin in Vincent substation.