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<br />12 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Chapter 1 - Gather Existing Information <br /> <br />8d. Title: Pollution of the Slate River via a Mine Discharge and Sewage <br />Treatment Plant Effluents. <br /> <br />Prepared by: John Woodling for the Water Quality Control Division, <br />Colorado Department of Health, Denver, CO. <br /> <br />Date: 1976 <br /> <br />Time of Study: August 1976 <br /> <br />Sites: Six sampling stations <br />Slate River Hwy 135 bridge <br />Slate River below confluence of Coal Creek <br />Slate River above confluence with Coal Creek <br />Coal Creek above confluence with Slate Rive,r <br />Coal Creek 40 yds downstream of Keystone confluence <br />Effluent from Keystone Mine at Coal Creek confluence <br />Effluent of Keystone Mine at Portal <br />Coal Creek immediately upstream of Keystone Mine effluent <br /> <br />Parameters measured: Temperature, pH, Conductivity, Total Hardness, <br />Lead, Copper, Zinc, Manganese, Cadmium, Chromium, Iron, Flow Fecal <br />Coliform, BOD, Suspended Solids, Ammonia, Total Phosphorus, <br />Macroinvertebrates <br /> <br />Purpose of Study: As a result of a tailings pile collapse at Keystone Mine in <br />Crested Butte, CO, a study was performed to assess metals contamination <br />and impacts to aquatic biota in Coal Creek and Slate River, <br /> <br />Other aspects of the study: In-situ bioassays were performed at 3 stations <br />on the Slate River. NPDES Permit data for Keystone Mine effluent are <br />provided. <br />, <br />