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2.0 Summary and Conclusions <br />The results of the structural geologic evaluation for the Spec-Agg Quarry, which <br />included field observations, geologic mapping, and stereographic analysis of <br />structural geology data, indicate that the current quarry configuration is stable <br />under the existing conditions and current rock mass assumptions. The stability <br />of each of the slopes is enhanced by the absence of significant hydrostatic <br />pressures, by current mining procedures, and by the current reclamation <br />process. <br />Few wall exposures were visible during the current investigation, thus reducing <br />the amount of data that was obtainable. Due to this, the overall analysis results <br />and dataset values have not changed since the 2006 study. Every effort was <br />made to identify and evaluate the quarry walls with respect to possible changes <br />from previous years, but no changes were noted during the investigation. <br />The additional foliation set initially identified in the 2005 study has been <br />designated as F-3. To date, not enough data have been collected to fully <br />develop a hypothesis regarding the location, extent and properties of the <br />foliation; or to eliminate the possibility that F-3 is basically a signature of the <br />undulating nature of the existing foliation set. The stereographic analysis <br />indicates that the F-3 discontinuity plane may only have minor influence on the <br />south walls, and will not influence the north, west or east walls. <br />Evaluations will be conducted during future investigations to evaluate whether or <br />not any of the foliation sets (F-1 through F-3) occur in the same location <br />simultaneously, or if the localized faulting has resulted in "structural blocks" that <br />have created regions in which the foliation planes occur separately. These <br />questions will continue to be addressed as more data are collected. <br />With respect to the quarry walls, the north walls are currently being mined at a <br />slope angle of approximately 35° and are currently stable; and as stated in <br />-2- <br />