567—71.13(455B) Animal feeding operation structures. Approval by the department for construction, operation, and maintenance of animal feeding operation structures shall be required in the following instances.
	71.13(1) Rural areas. In rural areas, any such facilities on the floodplain or floodway of any stream draining more than ten square miles.
	71.13(2) Urban areas. In urban areas, any such facilities on the floodplain or floodway of any stream draining more than two square miles.
	71.13(3) Adjacent to an impoundment. Any such facilities if any part of the facility is located on land that is naturally lower than the top of the dam.