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February 26, 20 10 Castle Concrete was unsuccessful at either removing or stabilizing a large portion of the <br />western edge of the south end of the quarry by placing explosive charges in the scarps in this location (See <br />Exhibit 5). <br />The instability in a portion of the original layback requires that some modifications to the original layback <br />phasing will need to be implemented. There were also areas that had been reclaimed in the southern portion <br />of the quarry that were affected by the two slides. During the investigative process it must be determined as <br />to the best method to now blend the north layback with what will undoubtedly be a similar layback in the <br />southern end of the quarry. These modifications will be determined by the investigation that will be <br />undertaken in the weeks to come. It is also clear that the south end of the quarry continues to move and this <br />could continue for some time. <br />EXIBITS: Included are a number of exhibits depicting the quarry and specific details within the area of the <br />quarry that are most important to the technical revision. <br />Exhibit 1: Pikeview Quarry as it appeared in April of 2008 prior to the first landslide <br />Exhibit 2: Pikeview Quarry as it appeared in December of 2008 after first landslide <br />Exhibit 3: Pikeview Quarry with location of prisms used in monitoring movement within the <br />permit boundary <br />Exhibit 4: Pikeview Quarry as it currently appears after second landslide <br />Exhibit 5: Location of explosive charges used on 2/26/10 <br />Exhibit 6: Drawing depicting the cross section through the original slide that occurred in <br />December of 2008 <br />Exhibit 7: Area of the southern scarp with existing scarps indicated by red lines <br />Exhibit 8: Lieca graph of the southern scarp area depicting movement from 1/1/2010-3/15/2010 <br />Exhibit 9: Lieca graph of the southern scarp area depicting movement from 3/15/20104/23/2010 <br />Exhibit 10: Lieca graph of the middle benches area depicting movement from 1/1/2010-3/15/2010 <br />Exhibit 11: Lieca graph of the southern scarp area depicting movement from 3/15/2010-4/23/2010 <br />Exhibit 12: Close-up location of fault and prisms along with graben <br />Exhibit 13: Visual details of described areas within the Technical Revision for clarity <br />Exhibit 14: Ever growing scarp on south end of quarry