Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Cumberland Darter, Rush Darter, Yellowcheek Darter, Chucky Madtom, and Laurel Dace

We, the U.S. Fish and Wildlife Service, designate critical habitat for the Cumberland darter (Etheostoma susanae), rush darter (Etheostoma phytophilum), yellowcheek darter (Etheostoma moorei), Chucky madtom (Noturus crypticus), and laurel dace (Chrosomus saylori) under the Endangered Species Act of 1973, as amended. In total, approximately 86 river kilometers (rkm) (54 river miles (rmi)) are being designated as critical habitat for the Cumberland darter, 44 rkm (27 rmi) and 12 hectares (ha) (29 acres (ac)) for the rush darter, 164 rkm (102 rmi) for the yellowcheek darter, 32 rkm (20 rmi) for the Chucky madtom, and 42 rkm (26 rmi) for the laurel dace. The effect of this regulation is to conserve the five species' habitat under the Endangered Species Act.