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A water quality investigation of the Crystal <br /> River drainage was undertaken by the Colorado Department of <br /> Health, in 1978 , under the direction of Peter Mars . (See <br /> Appendix III-I-4) . <br /> Coal Creek flows into the Crystal at a point <br /> 4 miles below the preparation plant area, and was thus <br /> included in the study . <br /> Mr . Mars ' research included establishment of <br /> representative sampling sites , which were then monitored on <br /> a routine basis . <br /> Water quality sampling stations were situated <br /> in the Coal Creek drainage at sites which monitored water <br /> draining both disturbed and undisturbed (by mining opera- <br /> tions) areas . <br /> Undisturbed area drainage sites were PC-1 , <br /> situated on Porcupine Creek above the confluence with Coal <br /> Creek, and BC-1 , situated on Bear Creek above the confluence <br /> with Coal Creek. <br /> Samples taken of disturbed area drainage <br /> included DC-1 , situated on Dutch Creek above the confluence <br /> with Coal Creek, and three sites along Coal Creek, including <br /> CC-3 , above the confluence with Porcupine Creek; CC-1 , above <br /> the confluence with Dutch Creek; and CC-1, above the con- <br /> fluence with Spring Creek. <br /> Sampling data from the Porcupine Creek station <br /> indicate that recommended limits for cold water biota are <br /> exceeded by the cadmium, lead , copper and iron concentrations . <br /> -21- <br />