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• and Colt pits. Water levels for well Glux-1 are presented on <br />Figure A-38. <br />2.2 GROUND WATER-LEVEL ELEVATION <br />level <br />Three piezometric maps were developed to show the water <br />flow patterns for the OR, HI and Third White Sandstone <br /> <br />1968 <br />aquifers at Trapper Mine. Water levels from the Fall of <br />were used in the development of these maps. <br />Map No. 2-1 presents the water-level elevations for the OR <br />aquifer. The GP series wells that are shown on this map are the <br />new wells installed for the eastern portion of the permit. The <br />water-level elevation is shown for the OR wells, GA1, GD2, GE1, <br />GF6, GP1, GPS and GP6 and backfill wells GD3 and GFil. The <br />• ground-water flow in the OR aquifer is mainly to the north. <br />Mining has affected the OR aquifer only close to the D and E pits <br />by causing drawdowns very near the pit edges. The installation <br />of backfill wells GD3 and GF11 have defined the depressed <br />elevations in the backfill areas. The backfill water levels will <br />likely stabilize lower than the pre-mine levels due to the <br />increased permeability of the backfill aquifer which allows the <br />water in the aquifer to be transmitted at a lower gradient. Table <br />2-1 (page 2-17> presents present aquifer properties at Trapper <br />Mine. The permeabilities from the backfill aquifers are <br />presently significantly greater than the coal aquifers which they <br />replace. <br />Drawdowns in the DR aquifer in the far western portion of <br />• Trapper permit near well GE1 are much more extensive than <br />adjacent to the remainder of Trapper Mine. These larger <br />2-13 <br />