Laserfiche WebLink
Subsitlence Field Observations <br />West Elk Mine <br />July 22-24, 2003 <br />4.3.4 Traverse Q-Q' <br />Traverse Q-Q' is the final traverse of the field observation this year and begins at the intersection <br />of the drill road on the east side of Deep Creek at the boundary common to Sections 2 and 35 and <br />ends at the Methane Drainage Wel] MDW-17A, B, and C (3 inclined drainage wells). <br />• The methane drainage well is located above the southeastern pan of longwall Panel 17. <br />Approximately 3,500 feet of the eastern pan of this panel was mined out as of July 7, 2003. <br />• The new drill road traversed exposes thick soil and colluvium and local weathered bedrock. <br />The unusually tall aspen and scrub oak observed along this traverse indicates that the thick <br />brownish to reddish brown to gray brown soil is rich in nutrients. <br />• Overburden depth to the B-Seam ranges from about 1,350 to 1,500 feet. The overburden <br />thickness at the well site is about 1,450 feet. <br />• No subsidence cracks or bulges were observed within the area of mining influence of the <br />eastern, mined-out part of longwall Panel 17. <br />Location 14: <br />This is an observation point for a large landslide that occurs west of this point on the west side of <br />Deep Creek. <br />• The landslide is about 1,300 feet long in an east-west direction (600 feet of vertical extent) <br />and as much as 650 fee[ wide (Figure 18). <br />• The landslide is located above the headgate entries of the mined-out part of longwall Panel 17 <br />(Map 1). <br />831-032.610 Wright Water Engineers, Inc. Page 31 <br />' September 2003 <br />