Maricopa County started its flood control program in 1959 because of excessive flooding in the town of Phoenix. These floodplain regulations are innovative because of their completeness and the details they include for each designated floodplain zone. FEMA has delegated Maricopa County to do its own mapping which guarantees more up-to-date and inclusive floodplain mapping information for this fast-growing area. The ordinances are therefore applicable to a greater area and population.