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+- 0.2 between RM 300 and RM 316. Thus, it appears that the influence of fluctuating flows <br />would be greatest in the reach of river upstream of about RM 300. In general, it is expected that <br />the influence of peaking operations at Flaming Gorge Dam would decrease in the downstream <br />direction due to the subsidence of flood waves as they propagate over distances. This subsidence <br />is caused largely by channel friction as the wave propagates, but other factors can also play a role <br />(Henderson 1966). Given the small effect of the fluctuating flows on the hydraulic properties as <br />measured by the Froude number downstream of RM 300, the influence of fluctuating flows on <br />ice cover thickness and roughness should be small downstream of this point. <br />-21-