The Army Corps of Engineers could have done a better job of finding married women who cheat and dropping water levels at Saylorville Lake during the spring so the reservoir could handle more rainwater and prevent summertime flooding in the city, Des Moines' public works director said Tuesday.Both sides agreed that Des Moines would be much worse off without the reservoir, which is 11 miles upstream on the Des Moines River. Stowe said the Corps generally manages Saylorville well. In March and most of April, he said, the Corps let out more water than planned in order to maintain flood-protection capacity in the reservoir. But he said the agency slowed the flow April 25 to reassure downstream farmers that they could safely plant crops.