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<br />13 <br /> <br />The virtual absence of any recruitment suggests a combination of biological, <br />physical 0 and/or chemical factors that may be affecting the survival and <br />recruitment of early life stages of razorback suckers. Within the Upper <br />Basin, recovery efforts endorsed by the Recovery Implementation Program <br />include the capture and removal of razorback suckers from all known locations <br />for genetic analyses and development of discrete brood stocks if necessary. <br />These measures have been undertaken to develop refugia populations of the <br />razorback sucker from the same genetic parentage as their wild counterparts <br />such that. if these fish are genetically uDique by subbasin or individual <br />population. then separate stocks will be available for future augmentation. <br />Such augmentation may be a necessary step to prevent the extinction of <br />razorback suckers in the Upper Basin. <br /> <br />Critical Habitat <br /> <br />Critical habitat has been designated within the 100-year floodplain of the <br />razorback sucker's historical range in the following sections of the Upper <br />Basin (59 F.R. 13374). <br /> <br />Colorado. Moffat Countv. The Yampa River and its 100-year floodplain <br />from the mouth of Cross Mountain Canyon in T. 6 N., R. 98 W., section 23 <br />(6th Principal Meridian) to the confluence with the Green River in <br />T. 7 N. 0 R. 103 W. 0 section 28 (6th Principal Meridian). <br /> <br />Utah. Uintah County: and Colorado. Moffat County. The Green River and <br />its 100-year floodplain from the confluence with the Yampa River in <br />To 7 N., R. 103 W. 0 section 28 (6th Principal Meridian) to Sand Wash in <br />T. 11 S., R. 18 E. 0 section 20 (6th Principal Meridian). <br /> <br />Utah. Uintah. Carbon. Grand. Emery. Wayne. and San Juan Counties. The <br />Green River and its 100-year floodplain from Sand Wash at river mile 96 <br />at T. 11 S., R. 18 E., section 20 (6th Principal Meridian) to the <br />confluence with the Colorado River in T. 30 S., R. 19 E., section 7 <br />(6th Principal Meridian). <br /> <br />Utah Uintah County. The White River and its 100-year floodplain from <br />the boundary of the Uintah and Ouray Indian Reservation at river mile 18 <br />in T. 9 S. 0 R. 22 E., section 21 (Salt Lake Meridian) to the confluence <br />with the Green River in T. 9 S. 0 R 20 E. 0 section 4 (Salt Lake <br />Meridian). <br /> <br />Utah Uintah County. The Duchesne River and its 100-year floodplain <br />from river mile 2.5 in T. 4 S. 0 R. 3 E. 0 section 30 (Salt Lake Meridian) <br />