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• REPORT OW <br />ALLUVIAL AQUIFER TESTING <br />AT THE SITE OF <br />SNOWMASS COAL COMPANY'S <br />PROPOSED UNIT TRAIN LOADOUT FACILITY <br />LOCATION <br />The test hole was drilled at the site of the proposed water supply well for <br />the loadout facility, as shown on the Base Map, Drawing No. SK-050580-TDP, <br />included with the permit application. <br />DRILLING METHOD <br />The test hole was installed on May 20 and 21. 1980 by Golder Eagle Drilling <br />Company, using a Portadrill drilling rig. Two air compressor units were <br />• used. a rig-mounted unit and a 750 cfs Gardner - Denver unit. In the course <br />of drilling operations, coarse-grained alluvial material was encountered <br />throughout the length of the hole. requiring the use of unconventional drill- <br />ing methods. Air drilling was supplemented by infection of gel and foam to <br />keep the hole open. When this procedure was no longer feasible, drilling <br />progressed through a series of successively narrower metal sleeves, which <br />were driven down in advance of the drill stem. In this fashion. the first <br />27 feet were drilled with a 7 7/8" bit. Another 20-foot section was drilled <br />with a 6~," bit before the hole collapsed. Below 47 feet, the circulation of <br />ground water made drilling by these methods impossible. <br />The depth to the water table was measured to be 36.3 feet on May 22. Two <br />nearby domestic wells were also measured on this date; the water level at <br />the Wise residence was a~easured to.be 4D. 35 feet white the depth to water <br />at the chuck residence was 29.1 feet (refer to Exhibit 2). <br />During drilling, a lithologic log was kept as shown in Exhibit 1. A water <br />. sample was taken for laboratory analysis. The occurrence of water in the <br />hole was aanitored but, because of the gel and foam used in drilling, it <br />