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1 <br />' Monitor holes 2-7L and TW2-7L are on the same location and apparently also responded to the <br />two leaking exploration holes. Longwatl panel 3 was mined past this location in April 1990 and <br />' the water level had dropped below 300 feet. Longwafl panel 4 was mined past this location in <br />August 1991. With the new equipment it was found that 2-7L has a dry blockage at 260 feet <br />' while TW2-7L has water at 659 feet as of the last measurement. <br />Monitor hole 36-2L appears to have stabilized at 196 feet during this period. Monitor hole 35-4L <br />' was found to have a dry obstruction at 438 feet. As noted previously, the 35-4 location was <br />mined through during this period. <br />' Monitor hole 4-20L showed a relatively static water level during this monitoring period. <br />' The response of 'lower sandstone fades' monitoring holes 2-17L, 2-7L and TW2-7L to mining <br />and leaking exploration holes indicates the area of influence in the 'lower sandstone fades' is <br />larger than that in either the 'upper sandstone fades' or the 'siltstone~oal fades'. However, the <br />response of these monitoring holes to low flows of about 1 gpm in the leaking exploration holes <br />further indicates the low water flow characteristics of the 'lower sandstone fades'. <br />From the baseline data, all three zones should be dassified as 'aquitards' in that they will yield <br />water but at very slow rates. Mining in the D Seam so far has encountered ony small flows of <br />' water and the mine is essentially dry. Water leaking out of caved areas is routed to the sumps <br />at the end of gateroads. From there ft is pumped to the surface through boreholes and <br />' discharged. The boreholes aze designated as sump dewatering holes (SDH2, SDH3, SDHS, etc., <br />see Plate 1). The quantify and quality of this water is discussed in Section 2.2.2.5. <br />' 2.2.2.4 Bedrock Water Quality Water sampling and analysis are no longer required from the <br />bedrock monitoring holes. However, prior to entering Federal leases C-8424 and C-8425, one <br />water quality sample will be collected and analyzed from each of the monitoring holes in those two <br />leases. <br />The Deserado Mine First Annual Hydrology Report (December 1985) contains baseline water <br />quality data for the bedrock zones. <br />' 2.2.2.5 Mlna Water Balance Table 2-3 shows the water balance for the Deserado Mine. <br />Pumping from the sealed district (LWt-LW5) resumed during this water year. Approximately 15.4 <br />million gallons were pumped from District 1. This water enters the mine from the surrounding <br />strata and is included in seeps. A description of how these numbers are arrived at follows. <br />--~ <br />J <br /> <br />10 <br /> <br />