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i• <br />• <br />• <br />The recharge to the alluvial aquifer is substantially <br />affected by the presence of several irrigation ditches and by <br />extensive flood irrigation in particular. Because of these <br />factors, a direct infiltration of precipitation and snowmelt as <br />well as infiltration from the North Fork Gunnison River to the <br />aquifer are less significant. This situation is therefore <br />downgrading the direct impact of the coal loadout, the presence <br />of surface facilities and man-made fills in particular, on <br />reducing the direct infiltration of~ precipitation and snowmelt <br />into the shallow aquifer. <br />The presence of man-made fills and coal stockpiles has a <br />limited potential for the aquifer contamination by any seepage <br />through the fill material. However, because of limited areal <br />extent of these fills, their low permeability and insignificance <br />of the quantity of this potential infiltration as compared to the <br />volume of infiltration from the irrigation ditches and flood <br />irrigation, the potential of a ground water contamination is <br />considered as extremely remote. Monitoring of ground water <br />quality could verify this conclusion. <br />CWI intends to complete a water well within the permit <br />area. The approximate location of this well is shown in Plate 1. <br />Although there are no hydrologic data available from this well at <br />this time, it is possible to make some assumptions about the <br />impact of this well on the ground water quantity and quality <br />within the permit area using results of our previous field <br />investigations. <br />The well permit is for 100 gpm. However, due to a <br />relatively low permeability of the alluvial aquifer, the well may <br />not yield quite such a quantity of water. <br />17 <br />GEO•HMRO CONSULTING, INC. <br />