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South <br />A pit North <br /> Possible leachate <br /> spillpoint during wet <br />periods to topsand and <br /> Clay-liner Ennis Draw alluvium <br /> (premining pz. surface <br /> was determined during 7 <br />•sr?, v_..•.•...•.....•..... major drought) <br /> •r r . <br />. <br />Laramie sandstone, <br />hale; siltstone s 4 * <br />° <br />- Ennis? <br /> E=e g <br />tri <br />c -? <br />f <br /> <br />r ; Ir'r <br /> <br />•' <br />. r <br /> coal <br />? <br />te; <br />??{ <br /> saturated, spoil ? <br />4}- <br /> " -?-'. <br />Possible leachate <br />migration to Ennis Draw <br />alluvium via coal seam <br /> Ground water and <br /> leachate flow direction <br /> Topsand (is above ground <br /> water) <br /> fL fL Alluvium, saturated with ground <br /> water (and/or possibly leachate <br /> in future) <br /> Alluvium <br />Figure 1- Schematic cro <br />ti <br />th <br />h A <br />i saturated <br />l <br />ss-sec <br />on <br />roug <br />p <br />t showing two possible <br />flow pathways of ground water and leachate from backfilled pit to alluvium wth <br />leachate <br />in Ennis Draw. No scale intended. ?. Spoil backfll <br /> Laramie coal seam, <br /> saturated with <br /> la-hat. <br /> ¦ Laramie coal seam <br />T. Kaldenbach, 3/05