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Mile Sandstone, lower Willimas Fork coals, Trout Creek Sandstone, and Iles <br />formation coals) indicate that there is little communication between them, <br />and therefore, the mine should have little effect on them. Springs SP 1, <br />2, and 3 appear to discharge water transmitted by localized lenticular <br />sandstones originating above the mine zone. These springs will partially <br />dry up during active mining and will approach their original flow rates as <br />backfilling occurs. Seep SP 4 receives its water supply from one of the <br />coal sequences scheduled to be mined. SP 4 is immediately adjacent to the <br />backfilling and reclamation, SP 4 discharges will return to normal or to <br />slightly higher than normal rates. <br />4.1.1.6 Regional 4lells <br />An inventory was made of wells registered with the Colorado Division of <br />Water Resources within four miles of the mine site. The locations of these <br />wells are shown on Exhibit 33, and pertinent data regarding them are <br />given on Table 3. <br />. Only nine wells were found within the four-mile radius, all of which are <br />used for stock watering and domestic consumption; there are no registered <br />wells down dip from the site within this area. It is likely that there are a <br />number of additional unregistered wells in the area, particularly along the <br />East Fork of the Williams Fork River. It is unlikely that any wells will be <br />.affected by mining since, all are 1'2 miles or more from the site. In the <br />Final Report detailed drawdowns and cone of depression contours will be plotted <br />to further assess registered well impacts. <br />4.1.2 Site Investigation <br />The hydro9eology of the site was investigated to evaluate the ground water <br />resource in terms of quality and quantity and to evaluate the potential <br />effects mining will have on these resources. <br />4.1.2.1 Occurrence of Water-bearing Zones <br />In order to evaluate the presence of water-bearing zones within the pro- <br />• posed mined interval, two core holes and one hole eventually completed as <br />dual completion monitoring wells were observed during air mist drilling for <br />10 <br /> <br />