Endangered and Threatened Wildlife and Plants; 12-Month Finding and Proposed Rule To Revise Critical Habitat Designation for Southern California Steelhead

Document 2026-13076 is a Proposed Rule published by the Department of Commerce in the Federal Register on June 29, 2026. We, NMFS, announce a 12-month finding on a petition to revise the critical habitat designation under the Endangered Species Act (ESA) for the Southern California steelhead (Oncorhynchus mykiss) distinct population segment (DPS). The petition from the United Water Conservation District (UWCD) requests the removal of an approximately 9-mile (14.5-kilometer (km)) stream reach from the confluence of Hopper Creek and the Santa Clara River to the face of Santa Felicia Dam. Based on our review of the best scientific and commercial data available, we find that the petitioned action to remove this reach from the critical habitat designation is warranted. Consequently, we are proposing to remove this reach from the critical habitat designation for Southern California steelhead. View the original at https://www.federalregister.gov/documents/2026/06/29/2026-13076/endangered-and-threatened-wildlife-and-plants-12-month-finding-and-proposed-rule-to-revise-critical.

No. Document 2026-13076 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.