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<br />3.0 Data Collection <br />3.1 Discontinuity Measurements <br />Structural geologic data collected for this evaluation include the measurement of <br />orientation (strike and dip) of the geologic discontinuities from the newly exposed rock <br />faces in the quarry, descriptions of the character of the discontinuities, and data point <br />location (taken relative to generally measured wall locations). Measurements were <br />taken from the faces of advancing benches in both the southern expansion area, and. in <br />the main pit of the quarry. A handheld GPS was used to obtain wall location information <br />and to identify where the structural data were collected from. <br />Discontinuity measurements were obtained utilizing a Brunton compass both indirectly <br />by sighting along the discontinuity surface; and where deemed safe, by direct <br />1 measurement on the discontinuity surface. Field inspection and data collection <br />occurred quarterly starting in June of 2007 and completing in January of 2008 and did <br />' not interfere with normal production mining activities. <br />A total of 58 discontinuity measurements were collected and added to the <br />measurements from previous years. When combined with data collected from previous <br />' annual reports (1997-2002, 2004-2007) and with borehole geophysical data collected <br />during the 2003 geotechnical investigation, a total of 3036 strike and dip measurements <br />of discontinuities in the quarry have been obtained over the past 11 years. Figure 4 is a <br />stereographic contour plot of all of the data collected since 1997. <br />Significant mining activity has occurred in the main pit since the last report and <br />' additional data points during this study were collected from this area (Photo 4). Two <br />exposures were accessible during our site visits; a generally north facing wall as well as <br />' an east facing wall (Figure 2, Station 1). Access to the middle bench excavation posed <br />some difficulty due to continued movement of materials by trucks during our visits. <br />? s.