2006-05-16_REPORT - M1974004 - Laserfiche WebLink

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4.0 Data Collection Discontinuity Measurements For the current (2006) geological structural evaluation of the quarry, LF&A collected 97 discontinuity measurements to add to the existing structural geology database. Data collected for this evaluation include the measurement of strike and dip of the geologic discontinuities from the newly exposed rock faces in the quarry, descriptions of the character of the discontinuities, and all of the data collection point descriptions taken relative to generally measured wall locations. Measurements were taken from the faces of advancing benches in both the southern expansion area, and on the middle level of the quarry. A handheld GPS was used to obtain wall location information and to identify where structural data were collected from. Minor mining activity has occurred in the main pit since the last report and additional data points collected for this study were collected from the southern temporary wall in the upper part of the main pit (Figure 2, Station 1; Photo 3). Figure 2 also shows the approximate locations of the exposed walls that were available to us during this review and the temporary station numbers where discontinuity measurements were collected during this study. Discontinuity measurements were obtained utilizing a Brunton compass both indirectly by sighting along the discontinuity surface; and where deemed safe, by direct measurement on the discontinuity surface. Data were collected during the week of April 10-14, 2006 and did not interfere with normal production mining activities. A total of 97 discontinuity measurements were collected and added to the measurements from previous years. When combined with data collected from previous annual reports (1997-2002, 2004-2005) and with borehole geophysical data collected during the 2003 geotechnical investigation, a total of 2,960 strike -~-