Parks, Natural Areas Preservation - As enacted, designates segments of the Buffalo River, Duck River, and certain other rivers and creeks as Class II pastoral river areas; expands certain public outreach requirements concerning scenic rivers. - Amends TCA Title 11, Chapter 13.

SB 1590 designates specific river segments - including the entire Buffalo River and most of the Duck River - as protected Class II pastoral river areas, while adding four new waterways (Beaverdam Creek, Lick Creek, Piney River, and Swan Creek) to this protected status. It removes previous county exclusions for the Buffalo River and modifies the Duck River segment to exclude only the Normandy Reservoir area managed by the Tennessee Valley Authority. The bill also updates public outreach requirements by changing references from "Duck River" to "any river" in state law. These changes directly affect communities and landowners along the designated waterways, particularly in Hickman, Williamson, and Dickson counties.