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Based on available mapping,this well may be mislocated or may no longer be used. There is no <br /> residence at the location of the well indicated by the State's database nor any road to any <br /> residence in the general area. This well may not exist at the plotted location. <br /> If the well exists, it is located in a location indicated by the modelling that will experience less <br /> than 5 feet of water level change as a result of mining. <br /> Although the water level in the aquifer will change,the well, if it exists, should still be capable of <br /> producing its permitted pumping rate even during and at the end of mine operations when <br /> impacts will be the greatest. If water level changes do impact the pumping rate from the well <br /> (which is not expected)the well could be redrilled to a deeper depth. <br /> 2.7.2 Potential Surface Water Impacts <br /> Windy Gulch and Dawson Gulch are mostly dry creeks and are separated from the ground water system <br /> beneath the mine. Accordingly,these local drainages will not be impacted by the mine operations. <br /> Grape Creek which appears to be in connection with the Precambrian material immediately adjacent to <br /> the creek, but is located outside of the area of ground water level change impact indicated by the <br /> modelling. <br /> Grape Creek generally flows from the south/southwest to the north/northeast and is generally located <br /> to the west of the mine workings that will be dewatered. In its upper reaches, Grape Creek flows over <br /> Precambrian material and in its lower reaches flows over sedimentary units before discharging to the <br /> Arkansas River. The lower reaches of the creek are separated from dewatering activities in the mine due <br /> to the different geologic units between the mine and those reaches, but also due to the significant <br /> faulting in the area. Certain portions of the upper reaches of the creek may have potential for depletion <br /> where mapped faulting is not present between the mine and the creek. For example, depletions may <br /> occur in a portion of the creek as it flows through nearby Sections 20 and 16. This reach is located <br /> approximately 1.5 to 3 miles from the mine workings. <br /> Grape Creek will not be directly impacted by the changes in water level in the aquifer. Grape Creek is <br /> considered a point of connection with the aquifer in the context of water rights in that some surface <br /> water feature must be identified as a point of depletion and this is the closest and most likely point of <br /> connection between the ground water system and the surface water system. Actual measurable <br /> impacts to Grape Creek are unlikely because physical impacts would require the complete <br /> interconnectedness of fractures between the mine and Grape Creek to allow for a physical pathway, <br /> which is unlikely. <br /> No other springs, stock water ponds, reservoirs or ditches were identified within an approximate 1-mile <br /> area. Figure 1 presents the location of the affected property area as well as the locations of the <br /> identified tributary water courses and drainages and wells that could potentially be affected by the <br /> proposed mining operations. <br /> 2.7.3 FTSF Leachate <br /> 2.7.3.1 FTSF Leachate Characterization <br /> Acid base accounting results for the tailings and development rock samples classify all material <br /> as non-potentially acid generating. All but one sample had sulfide sulfur at or below the <br /> detection limit of 0.01 wt%. One development rock sample had 0.03 wt%sulfide sulfur. All <br /> 39 <br />