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KA(dh/dl ). The resulting estimate from this data is for a flow of about 1900 <br /> gpd (1 .3 gpm) through the sandstone towards the river. This indicates that <br /> the aquifer is extremely tight and ground water flow towards the White River <br /> from the upper sandstone formation within the mine plan area is very limited. <br /> The lower sandstone facies 'is located below the White River alluvium within <br /> the mine plan area, and probably does not contribute water to the alluvium. <br /> Ground water flow within the Red Wash alluvium is also expected to be <br /> limited. A rough estimate of this flow was obtained by the same method as <br /> outlined above, resulting in an approximate flow of 29 gpm. <br /> In Scullion Gulch, in the southwest section of the lease area; ground water <br /> tends to move downward into the siltstone and coal Facies, which is near the <br /> ground surface at this location. Measurements in the northern observation <br /> wells show upward flow occurring from both the Lower Sandstone Facies and the <br /> Siltstone and Coal Facies to the overlying zones. In the eastern portion of <br /> the lease area, flow is consistently upward from the coal zone and more <br /> variable in the lower Sandstone Facies. Artesian pressures may exist below <br /> the deeper coal to the north, but are unlikely to be significant within the <br /> southern portion of the area to be mined. Over most of the area, water is <br /> moving upward out of the coal zone into the Upper Sandstone Facies, these <br /> results imply that the coal is more permeable than the Upper Sandstone <br /> Facies. These observations of vertical flow, coupled with the more southerly <br /> flow of deeper ground water, indicate hydrostatic pressure is being <br /> transmitted through the coal , under the axis of the syncline, and into the <br /> lease area. <br /> Potential Aquifers <br /> As a result of the aquifer testing program conducted by Western Fuels, only <br /> two potential aquifers have been identified during the course of this field <br /> program. One is the massive sandstone in the upper part of the Upper <br /> Sandstone Facies in the southwest corner of Section 36. This sandstone is not <br /> an aquifer in the normal sense of the word, but is saturated bedrock with low <br /> permeability. The depth below the surface to this saturated zone at Well 36-2 <br /> is about 135 feet. There are no known uses of the water in this aquifer. At <br /> this locati-g% the Upper Sandstone Facies is a thick, massive, fine to medium <br /> grained sandstone interbedded with gray siltstone and shale. Transmissivities <br /> measured from tests in the hydrology wells located in Section 36 (at Site <br /> 36-2) ranged from 13 to 74 gpd/ft. As stated previously, a general rule of <br /> thumb is that domestic or stock wells should have a specific capacity (a <br /> measure of well productivity) of at least 1 gpm/ft. The specific capacity of <br /> Well 36-2U is estimated to be less then 1 gpm/ft. <br /> The other potential aquifer is the White River alluvium in the vicinity of <br /> Wells Qal -3 and WFU-1 , located near the bridge across the White River at the <br /> entrance of the lease area. The specific capacity within well WFU-1 at a <br /> pumping rate of 90 gpm was determined to be 13.9 gpm/ft, indicating definite <br /> potential for this portion of the alluvium to be a source of water for use in <br /> the mine. Specific capacity of Well Qal -3 at a discharge of 90 gpm determined <br /> to be 8 gpm/ft. <br /> Ground Water Quality <br /> Groundwater quality samples were collected from eleven bedrock wells and four <br /> alluvial wells. <br />