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COAL CREEK , STATION # 20 <br /> TDS <br /> 400 <br /> 350 <br /> 300 <br /> 250 <br /> 200 <br /> E <br /> 150 <br /> 100 <br /> 50 <br /> 0 <br /> 4/85 4/86 6/87 5/88 7/89 <br /> Spring/Summer 1985-1989 <br /> TDS <br />