Laserfiche WebLink
r <br />Spring 2014 Subsidence and Geologic Field Observations <br />South of Divide a0d Dry Fork Mining Areas (E -Seam) <br />Fork Road) and on methane drainage weo (MDW) pads, particularly where they exist above active <br />mining. In general, subsidence - related tension cracks observed in previous site visits were <br />noticeably weathered and less discernible. <br />Longwall mining in the SOD mining area was initiated at E -seam Longwall Panel E1 in December <br />2008 beginning at the east end and progressing westward. All mining in the SOD mining area is <br />to progress from the east end of the panels toward the west. As of the time of our spring 2014 field <br />visit (June 23 and 24), mining was complete on E -seam Longwall Panels E1, E2, E3 and E4. <br />Mining of Longwall Panel E5 was initiated from the east end beginning in May 2014. Subsidence- <br />related observations at the surface were observed along Traverses C -C', E -E', F -F' and I -I'. <br />Subsidence related cracks observed along these traverses were somewhat expected given their <br />location above active longwall mining wivities at the time of the spring 2014 visit (i.e., areas of <br />maximum expected dynamic subsidence effects). Additional details regarding the observed <br />subsidence features can be found in Sections 4.3, 4.6, 4.7 and 4.14 of this report. <br />831 - 032.795 Wright Water Engineers, Inc. Page 2 <br />September 2014 <br />