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• Analysis of Subsidence Data <br />The following table presents an analysis of the subsidence survey data. Panel 61 had <br />advanced under the 24 and 26 Station numbers during the period. Following is a <br />summary of the survey data collected during the period. There was no activity near <br />Hubbard Creek or Dove Gulch. The survey data presents the subsidence over the west <br />D-Seam longwall panels after all three panels were complete and mining the B-1 Panel <br />was essentially complete. Subsidence monument 26E is located near the center of <br />panels WD1 and B1. WD1 resulted in subsidence of approximately 4.7' and B1 caused <br />and addition 5.8' of subsidence. <br />u <br />• <br />Station General Location Result <br />7A - 7C Hubbard Creek No signfcant change <br />17A -17F Hubbard Creek No signifcant change <br />1A- 1J D4 Headgate and <br />Nonh Mains Mining complete. Maximum subsidence 2.2' over D4 <br />head ate 1A <br />23A - 23C Mouth of Dove Gulch No signifcant change <br />24A - 24G Blest Submains & WD1 & Mining complete. Maximum subsidence 4.9' (24E) <br />25A - 25F WD2 Panel Mining complete. Maximum subsidence 6.2' (25C) <br />26A - 26G WD1 Panel & 61 Mining complete. Maximum subsidence 10.5' (26E) <br />27A - 27D WD2 Panel Mining complete. Maximum subsidence 4.2' (276) <br />28A - 28D WD1 Panel Mining complete. Maximum subsidence 6.9' (28B) <br />29A - 29D WD2 Panel Outcrop No significant change <br />30A - 30D W D Panels Outcrop No significant change <br />31A-31C D1 Tailgate No significant change <br />2 <br />