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• After the initial monitoring of each of the six (6) holes, the old monitoring holes GW-N13, <br />GW-N14 and GW-N15 will be abandoned. Abandonment reports will be submitted to DMG. <br />• Once the monitoring of new wells begin, monitoring of the existing wells GW-N16, GW-N17, <br />GW-N18, GW-N36, GW-N37 and GW-N38 in New Horizon 2 Mine will be suspended. <br />However, these wells will be kept open and ready to resume monitoring when New Horizon <br />Mine applies for a Phase 3 bond release of the area monitored by these wells in order to <br />collect data required by DMG. In June of 2002, the DMG requested that monitoring begin <br />again on wells GW-N16, GW-N17 and GW N18. <br />• Continue monitoring of two alluvial wells GW-N39 and GW-N40. The upstream alluvial well <br />is located in the flood plain near Lincoln Street in the southeast corner of the mine while the <br />downstream alluvial well is located down gradient of the mine but upgradient of the Nucla <br />wastewater lagoon in Calamity Draw. <br />• Well GW-N30 and GW-N34 have been mined out. <br />• Peabody has abandoned Wells GW-N29, GW-N32 and GW-N33 shown in Map 2.04.7-1A <br />in the past. <br />• Attachment 2.04.7-2 contains well completion diagrams for Ground Water Monitoring Wells <br />41-46. <br />• Since much of the New Horizon 1 ground has met the Phase 3 bonding requirements and <br />has been released to its' owners, TR-47 modifies Table 2.04.7-1 reflect the elimination of <br />many of the surface and groundwater monitoring sites. <br />Wells are monitored on a monthly basis for water levels. These levels are adjusted to mean sea <br />elevation. Water quality samples, when collected, will be analyzed for the parameters listed in <br />Table 2.04.7-, which also gives the frequency of water level monitoring, sampling and analysis. <br />Probable Hydrological Consequences <br />A discussion of the probable hydrologic consequences and reclamation plan are contained in <br />Section 2.05.6(3) and Section 2.05.6(3)(b)(v) of the permit application document. The following <br />discussion is intended to supplement the description of potential impacts of mining and mitigation <br />of these potential effects. The determination of significance has been made considering the impact <br />on the quality of the human environment, existing water uses, and the intended post mining land use <br />of the area. <br />2.04.7-55