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Creek coal, Sage Creek overburden, Wolf Creek/Wadge lnterburden, Wadge <br />coal, Wadge coal overburden, and the Hubberson Gulch alluvium. Quantity and <br />quality data have also been collected from ten springs and seeps in and adjacent to <br />the permit area, and three spoil springs that have developed on reclaimed <br />areas. The current monitoring plan requires monitoring of water quality <br />and/or water levels at specked intervals at 21 bedrock wells, 10 alluvial <br />wells, 8 natural springs and seeps and 3 spoil springs. Each year following <br />snowmelt, any additional spoil springs with discharge of at least 5 gpm are <br />documented ,monitored in spring and fall, and reported in the Annual <br />Hydrologic Report for the year. <br />Each of the identified aquifer zones are hydraulically discontinuous with the units <br />above and below. Therefore, each aquifer will be discussed as a separate entity. <br />Wolf Creek Seam <br />The lowest coal in the Williams Fork Formation of the Mesaverde Group is the <br />Wolf Creek seam. <br />Depth to water and water quality measurements have been made at three sites in <br />and adjacent to the original permit area. Water levels in the Wolf Creek at all <br />three sites exhibit confined conditions. Dependent upon proximity to the outcrop <br />recharge area (paralleling the Sage Creek anticlinal axis), and local structure, each <br />well has varying amounts of head. Ground water flows from the recharge area to <br />the center of the basin. Therefore, the major component of flow appears to be <br />toward the west. <br />Aquifer tests were performed on the two updip wells during the summer of 1980. <br />These tests indicate that the Wolf Creek is a fairly well confined aquifer which <br />transmits limited amounts of water. One well was pumped at an average of 1.2 <br />gallons per minute for about 3 1/2 hours, and produced no observable drawdown at <br />an observation well 20 feet away. Transmissivity values calculated for the Wolf <br />Creek range from 0.02 ft2 per day (0.149 gallons per day per foot) for we113WC, <br />to 0.001 ftZ per day (0.007 gallons per day per foot) in the two wells tested. Due <br />to the low water yield and transmissivity values, the storativity valtie of the Wolf <br />Creek seam is estimated to be about 1 X 10-'. These values, both transmissivity <br />and storativity, would appear to be quite low. Aquifer test data, however, does <br />substantiate these values. Due to the highly lenticular and discontinuous nature of <br />the Mesaverde Group, it is thought that transmissivity and storativity will be <br />aerially variable. <br />The quality of Wolf Creek coal water is slightly acidic, very hard and saline. Based <br />on data presented, the water type changes from calcium/sulfate to <br />Seneca II-W Findings Document 30 November 17, 2004 <br />Permit Revision No. 4 <br />