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All ground water data collected from monitoring wells in each future water year will be compiled and <br /> submitted to the CDMG in the form of the New Horizon Annual Hydrology Report (AHR). <br /> The AHRs will be submitted within three months after the end of each water year. <br /> Surface Water Protection <br /> Section 2.05.3(3), Mine Facilities, contains descriptions, designs, and plans for a sediment pond, <br /> roads, diversions, and culverts that will be constructed and utilized at New Horizon 2 mining area <br /> during mining. All facilities that are discussed in Section 2.05.3(3) have been designed to ensure <br /> that the hydrologic balance is protected. <br /> The discussion for surface water protection has been separated into three parts: 1) surface water <br /> quality; 2) surface water quantity; and 3) surface water monitoring. <br /> Surface Water Quality <br /> With the addition of Garvey and Burbridge properties for mining, the sediment pond (Pond 007) <br /> will be enlarged during the proposed operations for controlling surface water runoff from disturbed <br /> and reclaimed areas. The design of the pond has been developed to prevent additional <br /> contributions of sediment to stream flow outside the permit area, to minimize erosion, and <br /> incorporates detention times sufficient to ensure that all applicable effluent standards will be met. <br /> The pond discharge structures are designed according to standard engineering design procedures <br /> for protecting against erosion via emplacement of riprap and/or energy dissipators. The pond will <br /> be removed and reclaimed following the completion of mining and reclamation unless prior <br /> approval to retain this impoundment is obtained. The 1999 amendment to add lands to the north <br /> and west of the initial New Horizon 2 mine area resulted in the need for a number of new sediment <br /> ponds,which are shown in detail in the section on Mine Facilities. <br /> The impact of a sediment pond and runoff from reclaimed areas on the quality of receiving streams <br /> was found to be of minimal significance(see Probable Hydrologic Consequences at the end of this <br /> section). Existing NPDES permit (CO-0000213) has been modified to include 007. All terms <br /> and agreements specified in the approved permit will be adhered to during the mining <br /> operation to ensure that effluent will meet the permit limitations. Based on past water quality <br /> monitoring, it is anticipated that no treatment of pond effluent is necessary. However, <br /> should the need for treatment of pond effluent be demonstrated, New Horizon will commit to <br /> designing treatment facilities or procedures to handle the equivalent of a 10-year, 24-hour <br /> effluent volume. <br /> Plans for sampling overburden and topsoil after backfilling and grading have been developed and <br /> are presented in Section 2.05.4(2)(d), Topsoil (Redistribution). Based on these plans, surface <br /> January 2017 (TR-77) 2.05.6(3)-4 <br />