2010-12-08_PERMIT FILE - C1981008A (9)

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Alternative Water Supplies WFC will use the following alternative water sources to mitigate any ground or surface water right impacts. WFC has available 114.5 acre -feet of surface water, which is a consumptive use credit associated with WFC's ownership of 21 shares of the Colorado Cooperative Company (CCC). WFC has an absolute 4 acre -foot storage right for the 001 reservoir at the New Horizon 1 mining area and is projected to have 18 acre -feet of pit pumpage during the non - irrigation season available to them for use. WFC also has a 1.5 acre -foot ground water right associated with the mined out shop well. It is from these alternative sources of water that the surface water augmentation plan has been developed. No ground water impacts requiring mitigation are forecast. However, should a ground water supply be diminished to such an extent that it precludes its use, WFC will replace this supply with surface water available to them or will replace the well. Only 62.1 acre -feet of CCC water is required for the surface water augmentation plan. Alluvial Valley Floors Introduction At the request of the CDMG, Peabody submitted, on November 17, 1980, a report entitled "Reconnaissance Investigation for the Identification of Potential Alluvial Valley Floors in the Vicinity of the Nucla Mine ". The reconnaissance area included those portions of Tuttle and Calamity Draws which are adjacent to or near the New Horizon Mine. The San Miguel River was not taken into consideration. However, CDMG undertook a study in 1983 to determine if the San Miguel River could be considered a potential alluvial valley floor where it runs adjacent to the New Horizon Mine. The results of that study determined that there was a sufficient distance separating the mine from the San Miguel River to mitigate any impacts that may occur. Refer to the CDMG's Nucla Mine Proposed Decision and findings of Compliance Document (1983) for the results of their study. The discussion that follows is based on information contained in Section 2.04.7, field observations, and interpretation of false -color infrared and color aerial photographs at scales of 1" = 500'. Geomorpholoov The areas (First and Second Park) in which the New Horizon Mine and the New Horizon 2 mining area are situated were formed by a regional uplift of sedimentary rocks with the uppermost strata being the Cretaceous Dakota sandstone and Burrow Canyon formations. The formations are Revised August 2010 (PR06) 2.05.6(3) -13