Laserfiche WebLink
<br />2.05.6 Mitigation of the Impacts of Mining Operations <br />A clean coal stockpile will be constructed in the south central facilities <br />area. The stockpile has a footprint of 8 acres. The average precipitation <br />in the area is 8.8 inches based on the Fruita weather station. Assuming <br />5% of the rainfall leaches through the pile during the year, the resultant <br />flow would be 0.2 gpm. <br />Volume III, Tab 6 presents an analysis of the Cameo coal. Two grab <br />samples of the McClane Canyon Mine coal were analyzed. The McClane <br />Canyon mine data is relevant to the analysis because mining will occur in <br />the same seam as the McClane Canyon Mine and is only 4 miles south of <br />the Red Cliff Mine. Data from Snowcap Coal Company's permit is also <br />tabulated for comparison purposes. This data will represent the quality of <br />the clean coal stockpile leachate. Following is a summary of the data. <br /> <br /> McClane Grab Snowcap McClane Grab <br />pH (su) 8.0 9.26 8.0 <br />EC (umhos/cm) 500 304 394 <br />ABP (t/1 000t) 5 <br />Iron (mg/1) 15.6 7.0 <br />Manganese (mg/1) 0.48 1.7 <br />The predicted clean coal stockpile leachate has a much lower salt level <br />than the adjacent ground water measured at VB-06-03, VB-06-10 and <br />McClane's GW-3. Leachate from the clean coal stockpile will lower <br />conductivity and TDS concentrations in the groundwater in the vicinity of <br />the coal mine waste disposal area and the groundwater along East Salt <br />Creek. <br />Leachate from the clean coal stockpile area could slightly increase the iron <br />and manganese concentration in the ground water. <br />E <br />Notwithstanding the above discussion on ground water quantity and <br />quality, there is virtually no alluvial ground water in the lower portion of the <br />permit boundary. The Applicant drilled eleven geotechnical holes in the <br />lower permit boundary. Nine of the holes were dry and two encountered <br />water. Assuming an influence of 1000 feet from a data point, 550 acres of <br />the lower portion of the permit boundary is dry and 120 acres has <br />groundwater. See Map 11 Water Bearing Zones Alluvial Ground Water. <br />Permit Application <br />2.05-103 06/08