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1 <br />Monitor hole 4-20L showed a relatively static water level of 237.0 feet during this monitoring <br />period. <br />The response of "lower sandstone facies' 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 facies' is <br />larger than that in either the 'upper sandstone facies' or the 'siltstone-coal facies°. 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 facies'. <br />From the baseline data, all three zones should be classified as 'aquitards' in that they will yield <br />' water but at very slow rates. Mining in the D Seam so far has encountered only small flows of <br />water and the mine is essentially dry. Previously, water leaking out of caved areas was routed <br />to the sumps at the and of gateroads. From there it was pumped to the surface through boreholes <br />and discharged. The boreholes were designated as sump dewatering holes (SDH2, SDH3, SDHS, <br />etc., see Plate 1). The quantity and quality of this water is discussed in Section 2.2.2.5. No <br />' underground water has been pumped out of these locations since the January 31, 1996 <br />underground fire episode. <br />' 2.2.2.4 Bedrock Water Quality Water sampling and analysis are no longer required from the <br />bedrock monitoring holes. However, as required by DMG, prior to entering Federal leases C-8424 <br />' and C-8425, one water quality sample was collected and analyzed from each of the monitoring <br />holes in federal leases C-8424 and C-8425. Such sampling was limited to the middle (coal facie) <br />zone. <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 Mlne Water Balance Table 2-3 shows the water balance for the Deserado Mine. No <br />' water has been pumped from underground workings since January 10, 1996. Electric power to <br />the pumps has been cut off due to the underground fire; the pumps have been removed. During <br />' this water year, Deserado Mine started disposing the prep plant thickener water in the mined out <br />area of the D-Seam (the first longwall district). This water would have been otherwise discharged <br />through Pond PP-2. A description of how these numbers are arrived at follows. <br />1 <br />1 <br />1 <br />' 11 <br />