Des Moines Register: Des Moines Water Works CEO Ted Corrigan is closely watching Iowa’s growing drought conditions, concerned about falling water levels in the Raccoon River, the utility’s chief water source. With hot, dry conditions expected to continue, Corrigan expects the waterworks, which serves 600,000 customers in Central Iowa, will need to erect flashboards across a low-head dam on the river next week to ensure it has an adequate pool of water to draw from.