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evaluate escapement that occurred either during the annual spill or during outlet releases (evaluation draining). Access to the river was blocked below the spillway basin for the entire study; however, this was not the case for the outlet basin. Fish were able to move freely between the outlet basin and the river. Crews began the evaluation in 2002 and were able to successfully complete initial and evaluation drainings in the outlet basin in both 2002 and 2004. Crews attempted initial and evaluation drainings of the spillway basin in 2002, 2004, and 2005 and were not entirely successful unti12005, the only year that Starvation Reservoir had a significant spill. Because of this, escapement rates of the target species were calculated only for 2005. The reservoir spilled from 16 June to 11 July in 2005 and spilled a total of 15,533 acre-feet (AF). Rates of escapement based on 2005 sampling were as follows: smallmouth bass - 0.0028 fish/AF; walleye - 0.0005 fish/AF; yellow perch - 0.0006 fish/AF. Given these low escapement rates over the spillway and the self-sustaining nature of smallmouth bass in both the Green and Duchesne rivers, screening the reservoir may not be the most cost-effective means of limiting their escapement from the reservoir, especially in light of other management options. In order to best evaluate cost and benefit, the Program must decide whether or not this rate of escapement is acceptable given the effort expended on reducing smallmouth bass and walleye populations throughout the Green River drainage through nonnative removal efforts. Walleye escape from the reservoir and while they are occasionally encountered in the middle Green River during other Program efforts, there is little evidence of them successfully spawning in the river. One 25mm walleye was found during nonnative cyprinid removal work in the lower Green River in 2000 (Snyder 2000); however, as of 2006, this has been the only young ix