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2020-02-19_PERMIT FILE - C1981008A
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2020-02-19_PERMIT FILE - C1981008A
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Last modified
7/13/2020 3:10:34 PM
Creation date
7/10/2020 7:54:04 AM
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Template:
DRMS Permit Index
Permit No
C1981008A
IBM Index Class Name
Permit File
Doc Date
2/19/2020
Doc Name
Protection of the Hydrologic Balance
Section_Exhibit Name
Section 2.05.6(3) Protection of the Hydrologic Balance
Media Type
D
Archive
Yes
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Alternative Water Supplies <br /> New Horizon will use the following alternative water sources to mitigate any ground or surface <br /> water right impacts. New Horizon has available 114.5 acre-feet of surface water, which is a <br /> consumptive use credit associated with New Horizon's ownership of 21 shares of the <br /> Colorado Cooperative Company (CCC). New Horizon has an absolute 4 acre-foot storage <br /> right for the 001 reservoir at the New Horizon 1 mining area and is projected to have 18 acre- <br /> feet of pit pumpage during the non-irrigation season available to them for use. Hew Horizon <br /> also has a 1.5 acre-foot ground water right associated with the mined out shop well. <br /> It is from these alternative sources of water that the surface water augmentation plan has been <br /> developed. No ground water impacts requiring mitigation are forecast. However, should a ground <br /> water supply be diminished to such an extent that it precludes its use,New Horizon will replace this <br /> supply with surface water available to them or will replace the well. Only 62.1 acre-feet of CCC <br /> water is required for the surface water augmentation plan. <br /> Alluvial Valley Floors <br /> Introduction <br /> At the request of the DRMS, Peabody submitted, on November 17, 1980, a report entitled <br /> "Reconnaissance Investigation for the Identification of Potential Alluvial Valley Floors in the <br /> Vicinity of the Nucla Mine". The reconnaissance area included those portions of Tuttle and <br /> Calamity Draws which are adjacent to or near the New Horizon Mine. The San Miguel River <br /> was not taken into consideration. However, DRMS undertook a study in 1983 to determine if <br /> the San Miguel River could be considered a potential alluvial valley floor where it runs adjacent to <br /> the New Horizon Mine. The results of that study determined that there was a sufficient distance <br /> separating the mine from the San Miguel River to mitigate any impacts that may occur. Refer to <br /> the DRMS's Nucla Mine Proposed Decision and findings of Compliance Document (1983) for <br /> the results of their study. <br /> The discussion that follows is based on information contained in Section 2.04.7,field observations, <br /> and interpretation of false-color infrared and color aerial photographs at scales of V =500'. <br /> Geomorphology <br /> The areas(First and Second Park)in which the New Horizon Mine and the New Horizon 2 mining <br /> area are situated were formed by a regional uplift of sedimentary rocks with the uppermost strata <br /> being the Cretaceous Dakota sandstone and Burrow Canyon formations. The formations are <br /> overlain by varying thicknesses of undifferentiated eolian silts and sands. These deposits have <br /> January 2017 (TR-77) 2.05.6(3)-8 <br />
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