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shows the location of the mines and sampling sites. Coal Creek <br /> above the confluence with Porcupine Creek (Station CC-3, Table 27) <br /> was extremely high in solids, sulfate, alkalinity, cadmium, copper, <br /> iron, and lead. The r5 mine is probably responsible for this <br /> degraded condition since Porcupine Creek, which is the adjacent <br /> watershed, exhibits much higher quality. Samples of Porcupine <br /> Creek taken above the confluence with Coal Creek (Station PC- ] , <br /> Table 28) had much lower concentrations of solids , sulfate, and <br /> heavy metals. In fact dissolved solids levels decreased by a <br /> factor of five, suspended solids decreased by a factor of <br /> eighteen, and sulfate decreased by a factor of more than three. <br /> Cadmium and lead from Porcupine Creek were above recommended <br /> limits for a cold water biota, but Coal Creek at Station CC-3 <br /> exceeded limits for those metals as well as copper and iron, <br /> and for each metal except cadmium those Coal Creek values <br /> were much higher than values from Porcupine Creek. Coal Creek <br /> at Station CC-3 also had a pH value of 9. 1 on one occasion. <br /> This exceeds the recommended limit of 9.0 for a cold water biota. <br /> Coal Creek was next sampled approximately li miles below the <br /> confluence of Porcupine and Coal Creeks. The water quality <br /> at this Station CC-2 (Table 26 had improved to very near the <br /> quality of Porcupine Creek. Roughly 150 yards below CC-2 <br /> Dutch Creek enters Coal Creek. Dutch Creek receives discharges <br /> from mines °l , n2, and °4. <br /> - 20 - <br />