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Page 4 pounds. Historically, it was the most common member of the genus Gila in the Colorado River basin, but has declined in distribution and abundance at some locales in recent years. In Colorado, it is found in the Colorado, White, Yampa, Dolores., San ,luan, and Gunnison rivers. The roundtail chub is a large river fish, and occupies slow moving waters adjacent to areas of faster water. Young-of-the-year prefer shallow river runs, while juveniles concentrate in river eddies and irrigation ditches. The chub has declined in the Gunnison River, possibly due to Coldwater releases from the Curecanti Project. For more information regarding this species biology and distribution, contact this office, or the Colorado River Fishery Project at 303-245-9319. Additional details regarding Penstemon mensarum are not available at this time. You may contact Dr. Lucy Jordan in this office if more information is required. Section 7(c) of the Endangered Species Act, as amended, requires that the Federal agency authorizing a major Federal action significantly affecting the quality of the human environment to conduct and submit to the Service a biological assessment to determine effects of the proposal on listed species. The biological ,assessment shall be completed within 180 days after the date on which initiated or a time mutually agreed upon between the agency and the Service. The a:>sessment must be completed before physical project modification/alteration begins. if the biological assessment is not begun within 90 days, the species list above should be verified prior to initiation of the assessment. Therefore, the Forest Service should evaluate the potential impaci:s of this project and determine if the action may affect any listed species. If a determination is 'may affect' for listed species, the Forest Service must request in writing formal consultation from this office and should provide this office with a biological assessment, and any other relevant information used in making impact determinations. The Fish and Wildlife Service can enter into formal Section 7 consultation only with the Bureau of Land Management. State, county, or other governmental or private organizations can participate in the informal consultation process, help prepare information such as the biological assessment, participate in meetings, etc. Your attention is also directed to Section 7(d) of the Endangered Species Act, as amended, which underscores the requirement that the Federal agency or the applicant shall loot make any irreversible or irretrievable comaitment of resources during the consultation period which, in effect, would deny the formulation or implementation of reasonable and prudent alternatives regarding their actions on any endangered or threatened species. The memorandum and map you provided were very helpful in preparing this species list.. We concur with the conclusions you have tentatively reached for the ferruginous hawk, northern goshawk, southwest willow flycatcher, white- faced ibis, and Mrhooping crane. The long-billed curlew xas designated a category 3C <:andidate species on November 21, 1991, meaning it was determined to be more abundant or widespread than previously believed. further investigation appears warranted to determine whether impacts will occur to the other federally listed and candidate species. We appreciate your attention to