{"abstract":"We, the U.S. Fish and Wildlife Service (Service), determine threatened species status under the Endangered Species Act of 1973 (Act), as amended, for the longsolid (Fusconaia subrotunda) and round hickorynut (Obovaria subrotunda), freshwater mussels. We also designate critical habitat for both species. For the longsolid, in total, approximately 1,115 river miles (1,794 river kilometers) fall within 12 units of critical habitat in Pennsylvania, Kentucky, West Virginia, Virginia, Tennessee, and Alabama. For the round hickorynut, in total, approximately 921 river miles (1,482 river kilometers) fall within 14 units of critical habitat in Pennsylvania, Ohio, Indiana, Kentucky, West Virginia, Tennessee, Alabama, and Mississippi. We also finalize a rule under the authority of section 4(d) of the Act for both species that provides measures that are necessary and advisable to provide for the conservation of these species.","action":"Final rule.","agencies":[{"raw_name":"DEPARTMENT OF THE INTERIOR","name":"Interior Department","id":253,"url":"https://www.federalregister.gov/agencies/interior-department","json_url":"https://www.federalregister.gov/api/v1/agencies/253","parent_id":null,"slug":"interior-department"},{"raw_name":"Fish and Wildlife Service","name":"Fish and Wildlife Service","id":197,"url":"https://www.federalregister.gov/agencies/fish-and-wildlife-service","json_url":"https://www.federalregister.gov/api/v1/agencies/197","parent_id":253,"slug":"fish-and-wildlife-service"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2023/03/09/2023-03998.html","cfr_references":[{"chapter":null,"citation_url":null,"part":17,"title":50}],"citation":"88 FR 14794","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This rule is effective April 10, 2023.","disposition_notes":null,"docket_ids":["Docket No. FWS-R4-ES-2020-0010","FF09E21000 FXES1111090FEDR 234"],"dockets":[{"supporting_documents":[{"title":"USFWS 2020_IncrementalEffectsMemorandum","document_id":"FWS-R4-ES-2020-0010-0029"},{"title":"IEc 2020_Southeast Mussels Screening Analysis","document_id":"FWS-R4-ES-2020-0010-0028"},{"title":"Peer Reviews - see attached files.","document_id":"FWS-R4-ES-2020-0010-0007"},{"title":"Southeast Mussels Screening Memo_3.20.20","document_id":"FWS-R4-ES-2020-0010-0006"},{"title":"Longsolid Vertices","document_id":"FWS-R4-ES-2020-0010-0005"},{"title":"Industrial Economics Inc_2132020","document_id":"FWS-R4-ES-2020-0010-0004"},{"title":"Hickorynut Vertices","document_id":"FWS-R4-ES-2020-0010-0003"},{"title":"References Cited - See Attachments for individual files.","document_id":"FWS-R4-ES-2020-0010-0002"}],"agency_name":"FWS","documents":[{"comment_count":null,"comment_start_date":null,"updated_at":"2023-03-09T09:56:54.795-05:00","comment_url":"https://www.regulations.gov/commenton/FWS-R4-ES-2020-0010-0027","allow_late_comments":null,"id":"FWS-R4-ES-2020-0010-0027","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":8,"id":"FWS-R4-ES-2020-0010","title":"Endangered and Threatened Wildlife and Plants; Threatened Species Status With Section 4(d) Rule for Longsolid and Round Hickorynut and Designation of Critical Habitat"}],"document_number":"2023-03998","effective_on":"2023-04-10","end_page":14869,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2023/03/09/2023-03998.xml","html_url":"https://www.federalregister.gov/documents/2023/03/09/2023-03998/endangered-and-threatened-wildlife-and-plants-threatened-species-status-with-section-4d-rule-for","images":{"ER09MR23.020":{"large":"https://img.federalregister.gov/ER09MR23.020/ER09MR23.020_large.png","medium":"https://img.federalregister.gov/ER09MR23.020/ER09MR23.020_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.020/ER09MR23.020_original_size.png"},"ER09MR23.042":{"large":"https://img.federalregister.gov/ER09MR23.042/ER09MR23.042_large.png","medium":"https://img.federalregister.gov/ER09MR23.042/ER09MR23.042_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.042/ER09MR23.042_original_size.png"},"ER09MR23.021":{"large":"https://img.federalregister.gov/ER09MR23.021/ER09MR23.021_large.png","medium":"https://img.federalregister.gov/ER09MR23.021/ER09MR23.021_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.021/ER09MR23.021_original_size.png"},"ER09MR23.043":{"large":"https://img.federalregister.gov/ER09MR23.043/ER09MR23.043_large.png","medium":"https://img.federalregister.gov/ER09MR23.043/ER09MR23.043_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.043/ER09MR23.043_original_size.png"},"ER09MR23.022":{"large":"https://img.federalregister.gov/ER09MR23.022/ER09MR23.022_large.png","medium":"https://img.federalregister.gov/ER09MR23.022/ER09MR23.022_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.022/ER09MR23.022_original_size.png"},"ER09MR23.044":{"large":"https://img.federalregister.gov/ER09MR23.044/ER09MR23.044_large.png","medium":"https://img.federalregister.gov/ER09MR23.044/ER09MR23.044_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.044/ER09MR23.044_original_size.png"},"ER09MR23.023":{"large":"https://img.federalregister.gov/ER09MR23.023/ER09MR23.023_large.png","medium":"https://img.federalregister.gov/ER09MR23.023/ER09MR23.023_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.023/ER09MR23.023_original_size.png"},"ER09MR23.040":{"large":"https://img.federalregister.gov/ER09MR23.040/ER09MR23.040_large.png","medium":"https://img.federalregister.gov/ER09MR23.040/ER09MR23.040_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.040/ER09MR23.040_original_size.png"},"ER09MR23.041":{"large":"https://img.federalregister.gov/ER09MR23.041/ER09MR23.041_large.png","medium":"https://img.federalregister.gov/ER09MR23.041/ER09MR23.041_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.041/ER09MR23.041_original_size.png"},"ER09MR23.017":{"large":"https://img.federalregister.gov/ER09MR23.017/ER09MR23.017_large.png","medium":"https://img.federalregister.gov/ER09MR23.017/ER09MR23.017_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.017/ER09MR23.017_original_size.png"},"ER09MR23.039":{"large":"https://img.federalregister.gov/ER09MR23.039/ER09MR23.039_large.png","medium":"https://img.federalregister.gov/ER09MR23.039/ER09MR23.039_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.039/ER09MR23.039_original_size.png"},"ER09MR23.018":{"large":"https://img.federalregister.gov/ER09MR23.018/ER09MR23.018_large.png","medium":"https://img.federalregister.gov/ER09MR23.018/ER09MR23.018_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.018/ER09MR23.018_original_size.png"},"ER09MR23.019":{"large":"https://img.federalregister.gov/ER09MR23.019/ER09MR23.019_large.png","medium":"https://img.federalregister.gov/ER09MR23.019/ER09MR23.019_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.019/ER09MR23.019_original_size.png"},"ER09MR23.035":{"large":"https://img.federalregister.gov/ER09MR23.035/ER09MR23.035_large.png","medium":"https://img.federalregister.gov/ER09MR23.035/ER09MR23.035_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.035/ER09MR23.035_original_size.png"},"ER09MR23.036":{"large":"https://img.federalregister.gov/ER09MR23.036/ER09MR23.036_large.png","medium":"https://img.federalregister.gov/ER09MR23.036/ER09MR23.036_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.036/ER09MR23.036_original_size.png"},"ER09MR23.015":{"large":"https://img.federalregister.gov/ER09MR23.015/ER09MR23.015_large.png","medium":"https://img.federalregister.gov/ER09MR23.015/ER09MR23.015_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.015/ER09MR23.015_original_size.png"},"ER09MR23.037":{"large":"https://img.federalregister.gov/ER09MR23.037/ER09MR23.037_large.png","medium":"https://img.federalregister.gov/ER09MR23.037/ER09MR23.037_medium.png","original_size":"https://img.federalregister.gov/ER09MR23.037/ER09MR2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