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• <br />table (Appendix 3.3-6). <br />Groundwater in the Middle and Upper sandstones has not been <br />identified in the permit area. Two flowing exploration holes, <br />SK-12 and SK-2, which are outside the permit area to the east (not <br />located on Figure 3.3-6) are open to the Upper sandstone, as well <br />as other units, and may be receiving water from the Upper sand- <br />stone. More likely, the Upper and Middle sandstones are un- <br />saturated throughout the permit area and water flowing from SK-12 <br />and SK-2 is from perched zones above the Upper sandstone as in <br />SK-7. <br />A4uifer Characteristics <br />The sandstone beds in the Paonia Member of the Williams Fork <br />Formation above the Upper sandstone are thin, interbedded with <br />shales, siltstones, and coals, and not laterally continuous over <br />long distances. Generally, these units are unsaturated and only <br />locally produce water, such as at SK-7, SK-2, and SK-12. Flow <br />rates range from 1-2 gallons per minute (gpm) to a high of 8 gpm at <br />SK-2. Transmissivities are in the range of 100 gallons per day per <br />foot (gpd/ft). <br />The Upper and Middle sandstones are composed of medium grained, <br />well indurated, massive, quartz sandstone cemented by silica and <br />are only occasionally calcareous. These sandstones are each 50 to <br />I00 feet thick and appear to be unsaturated throughout the permit <br />area. <br />The Wheeler coal is saturated in only the deepest portions of the <br />permit area, below an elevation of 6080 feet. The Wheeler coal is <br />up to 42 feet thick and is fractured in certain zones. Ground <br />water yields are less than a few gpm. Because of the nature of the <br />monitoring holes completed in the coal, we are unable to test the <br />coal for aquifer characteristics, but transmissivities are es- <br />timated to be less than 100 gpd/ft. <br />NCBC - Coal Ridge #1 3-25 ABC/1145/900301 <br />