Iowa Admin. Code r. 567-70.1
The department has jurisdiction over all flood plains and floodways in the state for the purpose of establishing and implementing a program to promote the protection of life and property from floods and to promote the orderly development and wise use of the flood plains of the state. As part of the program, the department regulates flood plain development by three alternative methods: establishment of regulations for specific stream reaches by issuance of flood plain management orders (see Chapter 75); approval of flood plain management regulations adopted by local governments (see Chapter 75); and approval of flood plain development on a case-by-case basis where areas or projects are not covered by the first two methods (see Chapter 71). Any person who desires to construct or maintain a structure, dam, obstruction, deposit or excavation, or allow the same in any flood plain or floodway has a responsibility to contact the department to determine whether approval is required from the department or a local government authorized to act for the department.
Minimum statewide criteria for most types of flood plain development are listed in Chapter 72. Special requirements for dams are listed in Chapter 73.
Iowa Admin. Code r. 567-70.1