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Since fish were not present in Coal Creek or <br /> its tributaries , the Mars study did further testing to <br /> determine whether the water quality was sufficiently good to <br /> support a fish population . Stations were set up , and an <br /> insitu bioassay was conducted with rainbow trout . Fish were <br /> kept in cages at stations CC-1 , below the confluence with <br /> Dutch Creek; CC-2, above the confluence with Dutch Creek; <br /> and PC-1 , on Porcupine Creek. Water quality at all the <br /> stations proved suitable for the fish . <br /> It should be noted that a 100-year flood <br /> event , which occurred July 24, 1977 , decimated the aquatic <br /> population of the Coal Creek drainage . Biotic life is <br /> reestablishing itself gradually, but an abundance of species <br /> • should not be expected . <br /> The Coal Basin drainage can not be expected , <br /> even over the long term, to equal the Crystal River as <br /> habitat . Water quality, not only in Coal and Dutch Creeks , <br /> but Bear Creek as well, indicating a natural occurrence , <br /> exhibit higher solids , sulfate and heavy metals concentra <br /> tions than found in the Crystal . <br /> However, diversities and equitabilities of <br /> benthic samples from the Crystal River indicate excellent <br /> water quality . <br /> b . Inventory <br /> Species identified in Coal Creek at a point <br /> • below Dutch Creek include : <br /> -2a- <br /> i <br />