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Subsidence Field Observations <br />West Elk Mine <br />August 27.29, 2002 <br />Figuro 15. Subsidence cracks in woathered <br />bodrock, colluvium, and soil in tho bank of a drill <br />road abovo the western headgate entries of <br />longwall Panel 1t. <br />4.2.3 Traverse I-I' <br />I his trt~crsc Ixgins at Drill Ilulc 16-0~1, travcncs on a drill road alxwc the eastern pan of un- <br />mined longwall Panels I6 and 17, and ends at Drill I laic 17-03. <br />• fhr overburden depth ranges fmm I?W to I,(>v0 ft. <br />• The new drill road is primarily in thick colluvium consisting of silt, sand, and thick soil, <br />cscrpt near drill hole k,catiun 17-03. <br />• Weathered and fractured hedn,ck of the Barren Member of the Mesaverde Porn,ation is <br />cslxrxd at Urill Sitc 17-(1:. <br />4.2.4 Traverse J-J' <br />Ir,,vcrsc begins at lurk in new gill rood liom B to B' and cods at Drill Sitc I7-04 Inut yet <br />drilledl. <br />• Ovcrburdcn depth to the B-Scam ranges from I,G25 to 1,72$ fl. <br />• I he road cut esposc~s thick, brown soil, colluvium, and local weathered bcdnx:k o(the Burnn <br />Member of the Mesaverde Formation. <br />• The weathered hcda,ck is mostly exposed near Drill Site 17-(13. <br />831.032 570 Wnght Water Engineers. Inc Page 17 <br />December 2002 <br />