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Species Number of Sample <br /> • Organisms Date <br /> in Sample <br /> Rithrogena Species <br /> Rithrogena 3 10/12/78 <br /> Baetis 9 <br /> Arcynopteryx 2 <br /> Chloroperlinae 3 <br /> Brachycentrus 1 <br /> Chironomidae 2 <br /> Muscidae 2 <br /> Atherix Variegata 4 <br /> Source : Mars Study, Colorado <br /> Division of Health <br /> • C . Effects <br /> Water quality in Coal and Dutch Creeks , which <br /> drain disturbed areas in the permit area, is comparable to <br /> that of Bear Creek, which drains undisturbed area . Colorado <br /> Health Department samples of Coal Creek indicate that an in <br /> situ fish assay of Coal Creek by the Colorado Health Depart- <br /> ment indicates that Coal Creek could support a fish popula- <br /> tion. <br /> Mining activity, thus , seems not to have <br /> adversely affected the aquatic environment . The aquatic <br /> population is in the process of reestablishing itself after <br /> the destruction of the hundred-year flood event , which <br /> • occurred July 24 , 1977 . Benthic data collected nearly 16 <br /> months after the flood indicate that nine species had re - <br /> established . The applicant feels that the steep gradient of <br /> -25- <br />