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<br />Memorandum to Christine Johnston <br />October 7, 1999 <br />Page 8 <br />• The well is located 400 ft east of the longwall face in Panel 12, within the azea of influence <br />of the face (16-degree angle of influence). <br />1 • Subtle lineaz featwes west of well site, which trend roughly N30°E may be healed and <br />sealed cracks. <br />Location 8. Located at water monitoring well SOM-2-H (F-Seam Well) above mined-out azea of <br />longwall Panel 13. <br />• Overbwden thickness to B-Seam is about 1,100 ft. <br />1 • Ron Hanna measwed static water level drops over the last 4-5 yeazs to a level of 657 ft on <br />5-14-99. Probe was obstructed at 540 ft on 7-20-99 in this well. <br />' Reexamined Location 9 of September 1998. Located above the west central mined-out azea of <br />longwall Panel 13. <br />' • Overbwden thickness to B-Seam is 1,200 ft. <br />~ • There is no evidence of the cracks that were observed in September 1998-a time when <br />' no extraction mining had yet occurred in the area. <br />Reexamined location 10 of September 1998. Located above projected Panel 13A where no <br />extraction mining has yet occurred. <br />• Overbwden thickness to B-Seam is about 1,100 ft. <br />• Some of the widest and deepest cracks occurred at this location in September 1998. Now <br />the cracks, which were not mine related, aze now healed and sealed to the point where <br />there is no evidence of them. <br />• One crack 3 ft long, I %x inches wide, 2 inches deep, and trending N30°W, was observed. <br />No other cracks were observed. <br />Reexamination of location 11 of September 1998 at monitoring well So.W-1. <br />• Overbwden thickness to B-Seam is 1,000 ft. <br /> • No evidence of any subsidence cracks or depressions was observed. <br /> • Ron measwed a normal water level reading on 5-14-99 and on 7-20-99. <br />' <br /> Wright Water Engineers, Inc., 2490 W. 26'" Avenue, Ste. 100A, Denver, CO 80211 <br />I Tel. 303480.1700; Fax. 303/480.1020, e-mail krNright@wrightwater com <br />