USFWS proposes to list the Kentucky creekshell (Leaunio ortmanni [=Villosa ortmanni]), a freshwater mussel species from Kentucky and Tennessee, as an endangered species and designate critical habitat under the ESA. This determination also serves as their 12-month finding on a petition to list the Kentucky creekshell. After a review of the best available scientific and commercial information, they find that listing the species is warranted. Accordingly, they propose to list the Kentucky creekshell as an endangered species under the ESA. Finalizing this rule as proposed would add this species to the List of Endangered and Threatened Wildlife and extend the Act's protections to the species. They also propose to designate critical habitat for the Kentucky creekshell under the Act. In total, approximately 545 river miles (877 river kilometers) in Kentucky and Tennessee fall within the boundaries of the proposed critical habitat designation. They also announce the availability of an economic analysis of the proposed designation of critical habitat for the Kentucky creekshell. They will accept comments received or postmarked on or before 18 November 2024. POC is Lee Andrews, Field Supervisor, USFWS, Ecological Services Kentucky Field Office, 330 West Broadway, Room 265, Frankfort, KY 40601; tele 502-653-0571. (Federal Register 17 September 2024 [Proposed Rule] Pages 76196-76233)