Indiana Code Title 14. Natural and Cultural Resources § 14-28-1-1

(1) The loss of lives and property caused by floods and the damage resulting from floods is a matter of deep concern to Indiana affecting the life, health, and convenience of the people and the protection of property.  To prevent and limit floods, all flood control works and structures and the alteration of natural or present watercourses of all rivers and streams in Indiana should be regulated, supervised, and coordinated in design, construction, and operation according to sound and accepted engineering practices so as to best control and minimize the extent of floods and reduce the height and violence of floods.

(2) The channels and that part of the flood plains of rivers and streams that are the floodways should not be inhabited and should be kept free and clear of interference or obstructions that will cause any undue restriction of the capacity of the floodways.

(3) The water resources of Indiana that have been diminishing should be accumulated, preserved, and protected to prevent any loss or waste beyond reasonable and necessary use.

(4) A master plan or comprehensive plan for the entire state to control floods and to accumulate, preserve, and protect the water resources should be investigated, studied, and prepared, policy and practices should be established, and the necessary works should be constructed and placed in operation.