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potential for negative impact indicates it is not necessary to establish a ground water <br />point of compliance for the Laramie formation at the mine. <br />Compliance with requirement to minimize ground water hydrologic impacts inside the <br />permit area [CDMG regulation 4.05.1(2)J. The approved post-mining land use of most <br />of the permit azea is rangeland (a few acres aze approved for commercial/industrial gas <br />well use). As previously discussed, ground water in bedrock and alluvial aquifers have <br />not been adversely impacted by mining and reclamation operations at the Keenesburg <br />Mine. The approved post-mining land use has not been impaired by changes to the <br />ground water hydrologic balance caused by mining operations. The changes were the <br />minimum that can be expected from a surface coal mining operation. <br />Surface Water Impacts: <br />Compliance with Instream Numeric Standards (Colorado Water Quality Control <br />Commission Regulation 3.3.0). The Keenesburg Mine does not discharge surface <br />waters beyond its boundaries, and therefore it has not caused exceedances of instream <br />numeric standazds in the South Platte River basin. The Colorado Water Quality Control <br />Division terminated the mine's NPDES discharge permit several yeazs ago after finding <br />that no surface discharges aze likely. <br />Prevention of impacts to surface water that adversely impact the postmining land <br />use within the permit area (CDMG regulation 4.05.1(2)). There are no surface water <br />features in the permit azea. <br />Prevention of material damage to the hydrologic balance outside the permit area <br />(CDMG regulation 4.05.1(1)). Mining and reclamation at the Eagle Mines have not <br />caused impacts to the hydrologic balance outside the pennit azea. Observed impacts are <br />consistent with the probable hydrologic consequences (PHC) section of the permit <br />application which projects future impacts to be minor. <br />