Laserfiche WebLink
• Red Canyon Mine - 1998 AHR Page 3 <br /> <br />GROUND WATER <br />Alluvial piezometers (P-1 & P-2) were sealed during the year. Therefore table G-95 is not <br />included in this year's report. <br />The Division's letter dated March 3, 1994 requested the wells completed in the E-Seam <br />be monitored to determine at what level the workings have been flooded. The following <br />table presents the results of the requested monitoring. The 1987 Annual hydrologic report <br />predicted the water in the mine workings would reach the water level in E-1, 6355, in 1993. <br />The maximum water level in E-1 during September 1998 was 6381.4. The elevation of the <br />surface where the mine portals were developed is approximately 6400. <br />Monitorin Well E-1 <br />Date De th to Water Water Elevation <br />17-Se 94 64.1 6387.3 <br />29-Ma -95 64.5 6366.9 <br />18-Se 95 84.6 6366.8 <br />29-Se 98 58.1 6373.3 <br />29-Ma -97 55.1 6376.3 <br />29-Se 97 54.2 6377.2 <br />28-Ma -98 53.5 6377.9 <br />03-Jun-98 52.8 6378.6 <br />14-Se 98 50.0 6381.4 <br />Water samples were collected from wells A-1, A-2, E-1 and R-3 and delivered to Grand <br />Junction labs for analysis in June, 1998. The results of those analysis are enclosed. <br />Spread sheets are provided for wells A-1, E-1 and R-3 to compare baseline data with the <br />current results. The baseline minimums and maximums are compared to the current <br />results. No degradation of water quality is apparent from the June 1998 water quality <br />analysis. <br />The quality of water in well E-1 is "better" than the baseline data. The concentration of <br />total dissolved solids, bicarbonate, carbonate and sodium are all significantly lower than <br />the minimum comparable values from the baseline data. This may indicate well E-1 <br />contains a mixture of water from the alluvium and the E-1 coal seam. This data may also <br />explain why the water level in well E-1 is higher than expected. <br />Minrec is looking into a way to determine if the water level in monitoring well E-1 is <br />associated with the water level in the mine. Minrec still maintains there is no relationship. <br />If a relationship existed, then the water level in monitoring well E-1 should have decreased <br />while the mine was in operation and being dewatered, until 1984 or later. The enclosed <br />graph of the water level in well E-1 shows its water level has been trending up since 1980. <br />