2017-08-16_PERMIT FILE - C2010089A (3)

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anticipated that some of the sites may be relocated (with DRMS consultation) as mining advances and that other sites may be added as circumstances require. As an example, the two sites monitoring the 2nd Park Lateral inflow and out flow, SW -N209 and SW -N200 respectively, will be affected when the irrigation water is diverted through the HDPE pipeline. Irrigation water will be reintroduced in the Garvey parcel during the reclamation phase of the NHN Mine. This will be a sprinkling type of system in contrast to the current "flood" system. Additionally, prior to mining, the NHN permit area was managed to prevent irrigation water from entering the permit area. Surface water monitoring site SW -N205 will be affected in that the irrigation water will be shut off indefinitely. The surface water monitoring will be maintained for the life of the mining operation or until such a time as DRMS may agree that they are no longer necessary. Surface water monitoring installations, if any, will be removed upon completion of the post mining phase of the Hydrologic Monitoring Program. All surface water data collected at each monitoring site in each future water year will be compiled and submitted to DRMS in the form of the New Horizon Annual Hydrology Report (AHR) within three months after the end of each water year. Water Rights and Alternative Water Supplies Introduction Ground water rights (water wells) within the immediate region (1 mile radius) around the New Horizon North permit area are listed in Table 2.04.7-4 and the locations are shown on Map 2.04.7-8 of Section 2.04.7 Hydrology Description. In all, 30 ground water rights have been identified in the vicinity of the New Horizon North mining areas. All monitoring wells installed by the permittee and domestic wells within the surrounding area are shown on Map 2.04.7-8. Analyses and programs integral to the Water Rights Plan are presented in Section 2.05.6(3) and 2.05.6(3)(b)(v) of the permit. Pit inflow volumes and pit pumpage drawdown projections are discussed and presented in Probable Hydrologic Consequences at the end of this section. Impacts of mining discharges on downstream water quality and the shallow ground water quality for water use considerations are also presented in Probable Hydrologic Consequences at the end of this section. Finally, the detailed water rights plan which integrates the above -referenced information is presented in Appendix 2.05.6(3) -la. Water Rights Protection and Mitigation Plan The following discussion briefly summarizes the approach to the water rights plan. All ground and surface water rights within 1 mile radius of the New Horizon North Mine have been documented. Pit inflow and pit pumpage drawdown analyses were performed and tabulated. Drawdowns and pit bottom elevations were compared against water righted well production zone elevations to determine which wells could potentially be impacted by the mining induced drawdowns. Similarly, surface water rights within the one - foot drawdown contours were identified as those surface water rights which could potentially be Section 2.05.6(3) Page 7 April 2016 (PR -01)