Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Rayed Bean, Sheepnose, Snuffbox, and Spectaclecase Mussels

We, the U.S. Fish and Wildlife Service (Service), propose to designate critical habitat for the rayed bean (Villosa fabalis), sheepnose (Plethobasus cyphyus), snuffbox (Epioblasma triquetra), and spectaclecase (Cumberlandia monodonta), all species of freshwater mussels, under the Endangered Species Act of 1973, as amended (Act). Specifically, we propose to designate approximately 560 river miles (rmi) (902 river kilometers (rkm)) in 15 units as critical habitat for rayed bean; approximately 801 rmi (1,289 rkm) in 11 units as critical habitat for sheepnose; approximately 2,472 rmi (3,979 rkm) in 38 units as critical habitat for snuffbox; and approximately 1,143 rmi (1,839 rkm) in 12 units as critical habitat for spectaclecase. Portions of these proposed designations overlap among the four species; in total, approximately 3,974 rmi (6,396 rkm) of unique critical habitat within 76 units across 17 States (Alabama, Arkansas, Illinois, Indiana, Iowa, Kentucky, Michigan, Minnesota, Mississippi, Missouri, New York, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia, and Wisconsin) fall within the boundaries of the proposed critical habitat designations. We also announce the availability of an economic analysis of the proposed designations of critical habitat for all four species.