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unexpected conditions are encountered. Testing will include compaction tests <br />and periodic strength tests. Results of the tests and any observed unusual or <br />unexpected conditions will be submitted to the DRMS with the quarterly <br />inspection reports. <br />The quarterly reports will also include a summary of instrumentation monitoring <br />on coal mine waste pile number 2. This report will include a discussion of the <br />inclinometer data and the vibrating wire piezometer data. The inclinometer data <br />will determine if there are indications of deep- seated instability. The vibrating <br />wire piezometer data will determine if the measured pore pressures are relatively <br />stable and consistent with the September 22, 2008 stability analysis performed <br />by Buckhorn Geotech, Inc. <br />The Operator commits to having a geotechnical engineering firm continue <br />instrumentation monitoring, at a minimum, once per quarter. Additional <br />inclinometers and vibrating wire piezometers may be installed at the discretion of <br />the geotechnical engineering firm. <br />Five vibrating wire piezometers were installed in June 2005 (VWP -01 through <br />VWP VWP -05). Of the first five VWP's installed, only VWP -05 is currently in <br />operation. It is likely a short developed and damaged the cables. Three <br />additional wire piezometers (VWP -06 through VWP -08) were installed in June <br />2009. VWP -07 has also ceased to function. Two more piezometers were <br />installed in May 2012 (VWP -09 & VWP -10). Please see the location of the <br />piezometers shown on Figure 1. As progress continues on the gob pile, every <br />effort will be made to not damage piezometers. However, if they are damaged, <br />they will be repaired or replaced as soon as possible. <br />TR -85 _19- 04/14 <br />