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J++'a <br />�i Huddle,tuu-Barn <br />Also as indicated previously, HBET does not believe that a free water surface <br />exists within the gob. In addition, based upon the available data, significant increases in <br />the pore pressures in VWP-05, VWP-09, and VWP-10 are unlikely. The monitoring data <br />does indicate slight increases in the pore pressures in VWP-06 and VWP-08 over the last <br />couple of months; however, the increases are likely associated with active gob placement <br />operations and are a fraction of increases necessary to reduce the factor -of -safety to <br />below 1.5. It is also important to note that as the height of the pile increases, the active <br />placement area will become farther away from VWP-06 and VWP-08. HBET anticipates <br />that at some point, the pore pressures in these instruments will stabilize and then begin to <br />decrease. Although the current pore pressures do not indicate instability in gob pile #2 at <br />the full buildout height, it is impossible to accurately predict changes in the pore <br />pressures over time. As a result, continued quarterly monitoring of the piezometers is <br />recommended to identify any significant changes in the pore water pressures which may <br />impact the stability of gob pile #2. <br />4.0 GENERAL <br />This conclusions, results, etc. in this report is based upon the information in the <br />referenced documents, current analyses, and on our experience with similar projects. The <br />conclusions are valid only for the subject project. <br />Huddleston -Berry Engineering and Testing, LLC is pleased to be of service to <br />your project. Please contact us if you have any questions or comments regarding the <br />contents of this report. <br />Respectfully Submitted: <br />Huddleston -Bp Engineering and Testing, LLC <br />RIME <br />AL <br />Michael A. Berry, P.E. <br />Vice President of Engineering <br />V-20011 ALL PROJECTS'00789 - JE Sto,er Associates Inc 00739.0003 Bore \tine 100 - GewGob 2 -Full Buildout 00789-0003 R073014 doc 6 <br />