An irrigation district sued the California Independent System Operator, which manages the state’s electric power grid, claiming its plan to join a regional power group will invite the disastrous price-gouging the state saw during the 2000 electricity crisis. The Imperial Irrigation District, which serves more than 150,000 customers in the Imperial Valley, sued the California Independent System Operator (CAISO) on June 29 in Superior Court. The irrigation district claims CAISO’s decision-making process on whether to integrate its grid with that of six other Western states has been riddled with secrecy and puts consumers at risk.