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4.0 Data Collection <br />4.1 Discontinuity Measurements <br />For the current (2007) geological structural evaluation of the quarry, LF&A <br />collected 18 discontinuity measurements to add to the existing structural geology <br />database. Data collected for this evaluation include the measurement of strike <br />and dip of the geologic discontinuities from the newly exposed rock faces in the <br />quarry, descriptions of the character of the discontinuities, and all of the data <br />collection point descriptions taken relative to generally measured wall locations. <br />Measurements were taken from the faces of advancing benches in both the <br />southern expansion area, and on the middle level of the quarry. A handheld <br />GPS was used to obtain wall location information and to identify where structural <br />data were collected from. <br />Minor mining activity has occurred in the main pit since the last report and no <br />additional data points during this study were collected from the main pit (Figure <br />2, Station 1; Photo 3). Figure 2 also shows the approximate locations of the <br />exposed wall that was available to us during this review and the temporary <br />station numbers where discontinuity measurements were collected during this <br />study. <br />Discontinuity measurements were obtained utilizing a Brunton compass both <br />indirectly by sighting along the discontinuity surface; and where deemed safe, by <br />direct measurement on the discontinuity surtace. Field inspection and data <br />collection occurred during the week of January 15-19, 2007 and did not interfere <br />with normal production mining activities. <br />A total of 18 discontinuity measurements were collected and added to the <br />measurements from previous years. When combined with data collected from <br />' previous annual reports (1997-2002, 2004-2006) and with borehole geophysical <br />data collected during the 2003 geotechnical investigation, a total of 2,978 strike <br />-7- <br />