Laserfiche WebLink
Martin Marietta Materials <br />Spec -Agg 2013 Annual Report <br />2.0 PURPOSE AND SCOPE OF WORK <br />The purpose of the annual evaluation is to monitor the influence the bedrock structural geology has on pit <br />wall stability as mining progresses. The data collected during this annual assessment was obtained during <br />two site visits. <br />The scope of this study is as follows: <br />• Observe recent rock mass exposures for large -scale instability and collect geologic rock structure data. <br />• Document the orientation and character of rock mass discontinuities (e.g., joints, foliation and faults) <br />where recent exposures are accessible to supplement the existing structural geology database. <br />• Document groundwater observations at mapped locations. <br />• Photograph significant findings at the mapped rock mass exposures. <br />• Compare the new rock structure data collected during the 2012 -2013 annual study with the previously <br />collected data to identify potential changes to the previously analyzed discontinuity sets and possible <br />new sets that may need to be considered for the mine highwall slope stability analysis. <br />• Update the rock slope stability analyses for the final mine highwall slopes based on the new rock <br />structure data. <br />• Prepare this report to summarize the field observations, mapping data and slope stability analyses <br />results. <br />April 22, 2013 Page 3 Lachel & Associates, Inc. <br />Project 12361005.00 ©2013 All Rights Reserved <br />