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W <br />ES /CR:Critical Habitat <br />Mail Stop 65115 <br />APR 2 0 1154 <br />Memorandum <br />To: Cooperating Agencies (See Attached Distribution List) <br />From: Assistant Regional Director, Ecological Services, Region 6 <br />Subject: Critical Habitat Designation for Colorado River Endangered Fishes <br />The Final Rule designating critical habitat for Colorado squawfish <br />(Ptychocheilus Iucius), razorback sucker (Xyranchen texanus), humpback chub <br />(Gila cypha), and bonytail chub (Gila elegans) was published in the Federal <br />Register on Monday, March 21, 1994, (vol. 59 #54). The effective date of the <br />above - referenced Final Rule will be April 20, 1994. The Fish & Wildlife <br />Service (Service) recommends that your agency review its activities within the <br />Colorado River drainage (past, present, and future) to ensure compliance with <br />requirements of the Endangered Species Act of 1973 (as amended) as they relate <br />to critical habitat. Copies of the Federal Register are attached for your <br />convenience. Please distribute this information throughout your organization. <br />The Service is currently reviewing its files to identify all projects which <br />have undergone formal section 7 consultation since the listing of the <br />endangered Colorado River fishes. This list of projects will be provided to <br />you to assist in your determination as to which projects may require <br />reinitiation of section 7 consultation to address the listing of critical <br />habitat or other new information that was not previously considered. The <br />section 7 regulations (50 CFR Part 402.16) describe the requirements for <br />reinitiation of formal section 7 consultation. <br />Thank you in advance for your cooperation and interest in preserving <br />endangered species. If you have questions, please contact the individual <br />listed on Attachment 3. <br />Attachments (3) <br />