Associated Press: The Los Angeles Department of Water and Power has a storied place in California history. Its water grabs drained an eastern Sierra lake to make modern-day Los Angeles possible, and its backroom maneuvering to secure more water was the subject of the Roman Polanski film “Chinatown.” At the start of the decade, it became one of the unlikely profiteers during the state’s energy crisis. Today, the nation’s largest municipal utility is back in the spotlight, and this time the …