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. maintaining a predominantly river left or midchannellocation. Beads apparently began mixing more thoroughly at some point between Stewart Lake and the Stirrup (no drift net stations were set between these two flood plains) because both the Stirrup and Leota sites entrained relatively similar numbers of orange and yellow beads at each sampling occasion. Cross-channel bead distribution patterns support the general notion that multiple spawning bars and multiple high priority flood plain locations on each side of the river and up and down the reach are essential for maximum entrainment to occur. . . . Flood plain connections and sampling, 2005 Thunder Ranch, the upstream most flood plain wetland in the middle Green River complex, likely connected to the river on 19 May 2005. River flow on this day reached 393.8 m3/sec at the USGS gauge near Jensen, the gauge nearest to the site (Figure 3). Stewart Lake connected to the river at the lowest flow of all the flood plains sampled (around 227 m3/sec), likely on 12 or 13 May. Stewart Lake connected at a much lower flow because it is a man-made habitat, built as a mitigation wetland as a result of wetland loss when Flaming Gorge Dam was built. The Stirrup and Leota flood plain wetlands likely connected to the river on 20 May, the day after flows reached 393.8 m3/sec at the Jensen gauge. The first bead and larvae release occurred on 20 May when Green River flow reached 390.8 m3/sec, the second release was on 24 May when Green River flows reached 538 m3/sec, and the third release was on 30 May when Green River flows had receded from the peak down to 470.1 m3/sec. Drifting beads were captured at all sites including L-7, which is 85 km downstream of release sites. . . . . . . 37 .