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such as mayflies and caddisflies~hich_are sensitive to siltation were <br />• common is this study. There were also no consistent differences in <br />composition of fish above and below the silo. Fish fauna is the lower <br />section of the Williams Fork River is primarily composed of speckled <br />dace, redside shiner, and suckers. Low numbers of brown trout and <br />rainbow trout have been collected is rip-rap above the silo, but they <br />are not common in the study area. Salmoaid habitat in this stretch of <br />the river is considered to be marginal.with general lack of cover <br />representing a limiting factor. <br />Based on the results of this survey, the construction of the coal <br />silo or operation of Empire Energy's mine have not damaged the aquatic <br />resources in the Williams Fork River. Silt problems exist in [his river <br />but they appear to originate from sources upstream. <br /> <br /> <br />13 <br />