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r <br />v <br />• Mr. Scott Jones - 2 - March 10, 1986 <br />After review of the documentation available on We11 No. 1, it seems that there <br />is considerable discrepancy in the records concerning the completion success <br />and techniques used. Communication with Mr. Scott Jones at the mine, and <br />results of slug testing lead to the conclusion that the well is open <br />throughout the Mesaverde and into the Mancos strata. Therefore, the well may <br />be monitoring all the ground water of the entire coal section in the vicinity <br />of the mine. Due to the well's proximity to Mine No. 2 it is possible that <br />water from this mine may be entering this well. Therefore, the Division <br />requires the following. <br />The operator should assemble accurate records and survey information on <br />the old workings of Mine No. 2 and determine the position of Hole No. <br />M-1 both vertically and horizontally in reference to the old workings <br />and submit a report detailing the likelihood or lack of that We11 M-1 <br />is in hydrologic contact with Mine No. 2. <br />Ground Water Levels <br />Observations of water levels for the reporting year, 1985, indicate no <br />significant changes over previous years water levels. <br />Mine Discharge and Water Quality <br />• Discharge rates for Mine No. 1 have remained almost the same as those of the <br />previous reporting year at 291.5 acre feet (previous year = 290.4 acre feet). <br />Discharge rates for Mine No. 3 were not available or directly estimable from <br />the data submitted. <br />Water quality data for the reporting year 1985 for Mine No. 1 indicate a <br />slight rise in TDS of about 8% over the previous reporting year. This rise is <br />not considered significant. Water quality data for the reporting year 1985 <br />for Mine No. 3 indicates TDS levels remained near the same as those of the <br />previous reporting year (1985 TDS = 1098 mg/1 vs. 1984 TDS = 1100mg/1 ). <br />Please respond to the numbered comments no later than March 30, 1986. Your <br />response should be formatted so as to allow the revision to be directly <br />inserted into the annual report. If there are any questions or if <br />clarification is needed, please do not hesitate to contact this office. <br />Sincerely, <br />i _ _ <br />`' - 61~-L <br />Candace M. Thompson <br />Hydrologist <br />• CMT/pjh <br />7742E <br />