A congressman set off a legislative bomb in California’s water wars last week. Rep. Ken Calvert (R-Corona) inserted a rider into an Interior Department appropriations bill that would exempt from all judicial review the intensely contested Sacramento-San Joaquin Delta twin tunnels project. Passage of the rider — it’s scheduled for a House committee vote Tuesday — would mean that the water diversion scheme wouldn’t have to follow federal or state law. The project, known formally as California WaterFix, would bury two 35-mile-long, 40-foot-diameter tunnels beneath the delta.