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In order to evaluate each of the three potential bedrock hydrologic zones independently, observation and <br />• test wells were constructed to isolate each zone and prevent interFlow. The construction method for dually <br />completed observation wells is shown in Figure II.C-25. A similar cementing approach was used to isolate <br />different zones in the test wells. As shown, the Upper Sandstone Facies was isolated from the Siltstone <br />and Coal Facies and water levels in both zones were monitored. After the long string of tubing with <br />cementing baskets was run into the hole by the exploration drill, a small service rig was used for <br />cementing and running the second tubing string. Well completions into the Lower Sandstone Facies were <br />similar. In this case, the cementing baskets were placed at the bottom of the plug through the entire <br />Siltstone and Coal zone. In some cases, completions were readjusted if they were not functioning <br />properly. <br />Three test wells were drilled on locations where observation wells also had been completed in an attempt <br />to determine a reliable coefficient of storage as well as transmissivity. Two test wells were completed at <br />Location 2-7 (one into the Upper Sandstone Facies and one into the Lower Sandstone facies) and one <br />was completed at Location 2-17 (into the Siltstone and Coal Facies). Aquifer tests on the test wells were <br />performed using a service rig with a bailer. The well was bailed. for several hours at a steady rate while the <br />water levels (i.e., drawdowns) were monitored in the observation wells. As anticipated, the transmissivities <br />and water production were sufficiently low that the bailer method was quite adequate. Upon conclusion of <br />the drawdown portion of the test, a water quality sample was collected, bailing was stopped and recovery <br />measurements were made on the production well, as well as the observation wells. <br />• In addition to drilling test wells into and examining the potential for bedrock aquifers, five alluvial wells (see <br />Figure II.C-24) were drilled for both monitoring and testing. Wells Qal-2 and Qal-5 were located <br />at the mouths of Red Wash and Scullion Gulch, respectively, to monitor any underFlow from the drainages. <br />Well Qal-4 was drilled just south of the White River upstream from the confluence of Red Wash as a <br />control well outside the influence of any mine workings. Well Qal-6 was drilled north of the White River <br />between the mouths of Red Wash and Scullion Gulch to monitor potential upgradient impacts, while well <br />Qal-3 was drilled on the north side of the White River below the confluence of Scullion Gulch. In addition <br />to these wells, data were also obtained from the culinary well nest to the buildings in the mouth of Scullion <br />Gulch (called the Staley House Well) and from an existing well east of the buildings in the alluvium of the <br />White River (called Qal-1 ). All of these wells, except Qal-5, were subsequently flooded by Kenney <br />Reservoir and rendered unusable. <br />Groundwater level monitoring station surface elevations are given in Table II.C-9. The hydrologic wells <br />were drilled and completed using the exploration drilling rigs and crews provided by Teton Exploration <br />Drilling Company of Casper, Wyoming. Test well bailing for aquifer testing was performed by Water Well <br />Service of Craig, Colorado. A brief daily record of rig activities is listed in Attachment F. <br />Three new wells were drilled in 2005 and 2006 to monitor the area north and east of prior monitoring <br />activity (310122-2L, 22-3U, and 22-3M). <br />• Permit Revision #6 (3/2008) II.C-5 4 <br />