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. . and pipelines frequently must go underneath the river. Disturbance of this area, however, has a high likelihood of reducing razorback sucker larvae production from this spawning bar and should be minimized. . 2005 Cross-channel bead distribution Bead distribution patterns across the river channel were different at different river flow levels in 2005. For example, beads were not evenly distributed across the channel ofthe Green River for the first and third releases until beads had traveled six to 21 km downstream (Tables 2, 3, and 4, Figures 10 and 11). Bead distribution during the second and highest flow release was more even across the channel. In general, and similar to 2004 results, beads released at Razorback Bar (orange) remained on river right for over 22 RKM, bypassing Thunder Ranch almost entirely (Figure 10). In addition, the majority of beads released on river left at Escalante Bar (yellow) remained on river left for over 10 km (difference in distance due to yellow beads being released farther downstream) and thus accounted for the largest number of beads entering the Thunder Ranch site at all flows (Figure 11). At the two highest flows during the second and third releases, a few orange beads from the Razorback Bar release were detected at Thunder Ranch. Similarly, during the second release at the highest flow, beads released on river left were detected at all three cross-channel sampling sites, unlike during the first and third releases at lower flows, where yellow beads were detected only on river left and at the midchannel sampling site. This suggested faster cross-channel mixing at higher and perhaps more turbulent flows. Beads released at Razorback Bar were reasonably well mixed across the channel near Stewart Lake but beads released further downstream at Escalante Bar were not as well mixed, . . . . . . . 36 .