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<br /> <br />I <br />Review of Table 19 shows water at this site to be a magnesium sulfate type water. TDS <br />values have been increasing since 1982 due to mining in this area. <br />The Colorado Department of Health (CDOH) has established water cuality standards for <br />tributaries of Trout Creek of which Cow Camp Creek is a tributary of (see Table 21). <br />9efore comparine water quality at this site to those standards, it should be noted that <br />the CDOH has arbitrarily set drinking water standards for this stream seoment even though <br />this water is not being used for such purposes. Nitrate, nitrite, chloride, sulfate, <br />arsenic, selenium, and zinc standards are all based on drinking water standards, even <br />though these standards are sometimes exceeded in undisturbed drainages within the Trout <br />Creek basin. Some parameters, such as cadmium, lead, mercury, nickel, and silver are <br />actually more stringent than drinking water standards. <br />At site SW-S2-6 in 1966, total iron, dissolved manganese, and sulfates all have exceeded <br />CDOH receiving stream standards. The maximum total iron observed was 1.32 mgll, the <br />standard being 1.0 mg/l. Dissolved iron values, however, were belorv this standard. The <br />maximum dissolved manganese observed was 0.59 mg/1, while the standard is 0.174 mg/l. The <br />maximum sulfate value ohse rued was 1,375 mgfl, where the standard (again, a drinkinc water <br />Standard) is 250 mg/7. None of these parameters are expected to seriously affect <br />downstream use, especially in light of the intermittent nature of Cow Camp Creek at its <br />confluence with Fish Creek. Any discharges from Cow Camp Creek would be rapidly diluted <br />by flow in Fish Creek. <br />Due to concern by the CMLRD, the issue of impacts in the Fish Creek drains ne has been <br />addressed at length in the 1986 Seneca II Permit Renewal. Since no additional information <br />is available for the 1986 water year, the reader is referred to that document. Additional <br />monitoring, described earlier in this text, will take place in 1987. More data will be <br />available in future AHR s. <br />3. Surface k'a ter Site SW-S2-9 <br />This site monitors the ncrth tributary of Fish Creek, from here on referred to as Bond <br />Creek. Monitoring here began in March, 198b in anticipation of mining to begin in this <br />drainage in 1987. Review of the hydrog ra ph shows typical seasonal variations expected in <br />this area. A crest stage gauge was installed in the fa 11 of 1986. <br />Review of Table 19 shows water at this site to be a calcium bicarbonate type water with a <br />44 <br />