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CWDA No. 2 <br />#01349-0001 0 Hadd[estan-Berry <br />10/14/15 Hn;lnserin}S Te•iing LLC <br />The current pore pressure reflects a piezometric surface elevation of approximately 6097.5 feet <br />which is much less than the critical elevation of 6113 feet. As a result, HBET does not believe <br />that the measured pore pressures in VWP-08 are any indication of instability in CWDA No. 2. <br />VWP-n 9 <br />VWP-09 was installed on May 18, 2012 near the toe of CWDA No. 2. The pore pressures <br />recorded at VWP-09 have been fairly steady since installation. This suggests that dewatering of <br />the gob in this area is likely nearly complete. It is anticipated that the pore pressures at VWP-09 <br />will remain fairly steady over time. <br />VWP-10 <br />VWP-10 was installed on May 18, 2014 near the toe of CWDA No. 2. The pore pressures <br />recorded at VWP-10 have been fairly steady since installation. This suggests that dewatering of <br />the gob in this area is likely nearly complete. It is anticipated that the pore pressures at VWP-10 <br />will remain fairly steady over time. <br />Site Visit Observations <br />HBET visited the site on October 6, 2015. At the time of our visit, mine waste was being <br />excavated from the area previously separating Gob 2 and Gob 4 and moved to the west on <br />CWDA No. 2 where it was being placed and compacted. Small stockpiles of cover soil were <br />observed along the eastern half of CWDA No. 2 and it appeared that the contractor was <br />preparing to place the cover on finished slopes in this area. HBET did not observe any material <br />from the wash plant being moved to CWDA No. 2. In general, CWDA No. 2 appeared to be in <br />good condition and no evidence of instability or other adverse conditions were observed. <br />General <br />In general, based upon the results of the recent VWP and inclinometer monitoring data, and upon <br />our observations at the site, HBET does not believe that there is any reduction in the stability of <br />CWDA No. 2. Continued quarterly monitoring of piezometers and inclinometers is <br />recommended. <br />We are pleased to be of service to your project. Please contact us if you have any questions or <br />comments regarding the contents of this report. <br />Respectfully Submitted: <br />Huddleston -Berry Engineering and Testing, LLC <br />Michael A. Berry, P.E. <br />Vice President of Engineering <br />X:\2008 ALL PROJECTS\01349 -Bowie Resources, LLC\01349-0001 Bowie Mine\200 - Geo\Gob 2\Imtr ntation Monitoring\2015\01349-0001 GP2 3rdQ 2015 101415.doe 3 <br />