California’s system of dams and canals is made of equal parts concrete and injustice. Injustice is baked into the system, which unfairly burdens Stockton and the Delta. A “vast and powerful” constituency of Delta water exporters — the south-valley water districts of Big Ag, southland urban consumers — likes it that way. Their latest baby, the California WaterFix, is more of the same. On Monday Restore the Delta unveiled a new way of fighting the WaterFix, with its twin tunnels: showing its impacts will fall most heavily on the so-called “environmental justice community” of Stockton and the Delta region.