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42 <br />• Miller et al. (1982c) reported daily flow changes below Flaming Gorge <br />Dam to be detrimental to Colorado squawfish larvae. Effects of the flow <br />changes decreased with distance below the dam. <br />Pucherelli and Clark (1989) reported the influence of flow at Flaming <br />Gorge Dam on backwater habitat availability to decrease with distance <br />from the dam. Island Park, Utah, and Jensen, Utah (sites 84 and 110 <br />miles below the dam, respectively) exhibited considerable variation in <br />backwater availability with changes in discharge. The reach from 200 to <br />280 miles below the dam, which includes Ouray, Utah, and Sand Wash, <br />Utah, showed no changes in backwater area with flow changes from <br />1889 cfs to 4359 cfs as measured at the U.S. Geological Survey gage at <br />Jensen, Utah using aerial photo comparison techniques. <br />Tyus et al. (1987) pointed out that the reach between river mile 200 and <br />280 reach is considered good nursery habitat for Colorado squawfish <br />larvae. <br />Humpback chub. <br />o Daily and shorter term flow fluctuation is detrimental to larval survival of <br />humpback chub. <br />Miller et al. (1982c) reported daily flow fluctuation below Flaming Gorge <br />Dam to be detrimental to survival of humpback chub larvae. Impacts <br />were noted as far downstream as Ouray, Utah. <br />0