Indiana Code Title 14. Natural and Cultural Resources § 14-29-6-8

Sec. 8. (a) As used in this section, “natural river” means a river that, free of impoundments, is generally unpolluted, undeveloped, and inaccessible.

(b) The director may study and periodically submit to the commission proposals for the inclusion of a section of a river into the system that, in the director's judgment, falls within at least one (1) of the following categories:

(c) In recommending a river or section for inclusion in the system, the director shall prepare a detailed report on the factors that, in the director's judgment, make the river worthy of designation for inclusion in the system.  This report shall evaluate among other categories the following:

(d) Specific criteria for each of these natural river, scenic river, and recreational river categories shall be selected after having given due consideration to the categories specified in subsection (c) and any other categories that are considered to be important.