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<br />this document is intended to be consistent with its use in the <br /> <br />Act. <br /> <br />The tenn "essential habitat" is used here to denote stream <br /> <br />segments that also must be protected to assure maintenance of <br /> <br />. <br /> <br />adequate flow and temperature conditions, riparian vegetation, and <br /> <br />physical habitat, but which do not necessarily require designa- <br /> <br />tion as critical habitat. <br /> <br />A. Critical Habitat: to be designated as such ~ the Secretary of <br />the Department of the Interior <br /> <br />l. Colorado River <br /> <br />(a) Black Rocks [RH l25-1.54J and Westwater Canyon <br />[RH 116-l24]. <br /> <br />* Squawfish: <br /> <br />suspected spawning area <br />high-density young-of-the-year <br />area <br />high concentration of adults <br /> <br />nursery <br /> <br />* Humpback: <br /> <br />concentrated area <br /> <br />. <br /> <br />(b) Professor Valley [RM 70-86] <br /> <br />* Squawfish: high-density young-of-the-year nursery <br />area <br />high concentration of adults <br />concentrated area for juveniles <br /> <br />2, Green River <br /> <br />(a) ~ Canyon [RH 118-157 ] <br /> <br />* Squawfish: confirmed spawning area <br /> <br />* Humpback: <br /> <br />concentration area <br /> <br />(h) Sand Wash to Split Mountain [RM 211-320] <br /> <br />* Squawfish: high concentration of adults <br />concentrated area for juveniles <br />hlgh-density area for young-of-the-year <br />nursery <br /> <br />. <br /> <br />4 <br />