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Require- <br /> ment <br /> Require- complied <br />Requirement ment with ~ (yes Comment <br /> citation <br /> nolindeterm <br /> -inate <br /> Should any degradation occur, the following two aquifers are <br /> the most likely to be degraded by mining at Carbon Junction: the <br /> Animas River alluvium (400 ft. downslope from the mine) and <br /> the Pictured Cliffs Sandstone (subcrops beneath the mine pit). <br /> Alluvial aquifers: Animas River alluvial water can be expected <br /> to have not been degraded by mining because the less than l0- <br /> acre surface area of spoil at the mine would not generate enough <br />Basic <br />T CWQCC leachate to overcome the dilutional effect of native alluvial <br />. <br />Standards regulation ground water. <br />for Ground s yes Bedrock aquifers: Downgradient monitoring well 95-1 was <br /> <br />Wa[er 41.4 and <br />drilled in 1/94 to total depth 350 ft. Although its perforated <br /> 41 5 depths are unavailable, presumably it was perforated like <br /> reclaimed well 94-1 i.e. top to bottom. The presumed perforated <br /> interval of well 95-1 extends through sandstone beds in the <br /> Fruitland formation and the Pictured Cliffs sandstone. The well <br /> is within the expected flowpath of any coal spoil leachate that <br /> would be generated in the Carbon Junction backfilled pits. Well <br /> 95-1 has not shown evidence of leachate. <br />U. Restoration <br />of ground <br />water CDMG Carbon Junction's approximate 100-acre surface disturbance <br />recharge to regulation yes probably is not enough to diminish recharge to aquifers. <br />approximate 4.05.11(3) <br />premining <br />rate <br />V. Prevention of <br />adverse <br />impacts to CDMG Compliance with the Basic Standards for Ground Water (see <br />ground water regulation yes item T, above) and no impacts to recharge indicate compliance <br />systems 4.05.1 l with 4.05.11. <br />outside the <br />ermit area <br />W. Preventio <br />n of impacts <br />to ground CDMG The postmining land uses of rangeland, wildlife habitat, and <br />water that regulation dryland farming will not use ground water. Consequently, any <br />adversely s <br />YeS <br />impact to ground water will not impact the postmining land use in <br />impact the 4.05.1(2) the permit area. <br />postmining and <br />land use 4.05.11 <br />within the <br />ermit area <br />Page 4 <br />