Indiana Code Title 36. Local Government § 36-9-29-17

Sec. 17. (a) If the state or a political subdivision has territory that will be affected in whole or in part by flood control works, it may grant to the flood control district the use of any property in which it has an interest, including its rights in public ways, for use in connection with the construction of the flood control works, upon the terms agreed upon.  Such a grant must be authorized by:

(b) Grants under this section shall be made in the form of a deed or other written instrument that may be recorded.  The grant may provide that when property is no longer needed for the purposes of the flood control district, the property reverts to the state, or the political subdivision, making the grant.