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<br />' presplitting with primacord in unstemmed holes is a satisfactory alternative to our recommendation for <br />air deck presplit holes. <br />' Depending on Cooley's degree of satisfaction with the muck pile configuration, and with the size of <br />rock blocks and their suitability for the crusher from production blasting, we think that a review and <br />' redesign of your production blasting pattern might also allow the use of less explosive to achieve the <br />same excavation volume( i.e, a reduced powder factor), improved muck pile shape and distribution to <br />reduce cycle time, improved muck pile rock size, or all of the above. We would be happy to discuss <br />the possibility of improving blasting techniques, or provide a more detailed blasting design for the <br />' recommended perimeter control blasting at Cooley's convenience. <br />' 5-03. SLOPE MONITORING <br />As presented previously, the interim slope configuration is the first step in a two-step process to <br />' obtain a slope which is stable in the long term and which can be reclaimed. The configuration of the <br />final slope will be dependent on the behavior and stability of the interim slope. Therefore, it is <br />imperative that the performance of the interim slope he monitored over time and that results of the <br />monitoring program he evaluated and recorded. Haley & Aldrich recommends that the monitoring <br />program include as a minimum regular visual observations of the slope and an array of survey <br />monuments to quantitatively evaluate slope movement. <br />' Beginning with the completion of slope re-construction and continuing for a period of one year, the <br />slope should be inspected at least once every two months by qualified personnel at the Quarry or by <br />' personnel intimately involved with quarry operations. After a period of one year the slope should he <br />inspected at least once every four months. These regular inspections should look for signs of <br />.instability such as tension cracks and bulges in the overall slope, and loose or missing rock blocks or <br />' ~+vedges from individual benches. Inspections should include photographs of the suhject area taken <br />tiom several different locations. The same photo locations and angles should be used for all <br />inspections. Results of the inspections should be recorded in a field notebook dedicated to the <br />inspections. Furthermore, results of the inspections should be included in regular reports as required <br />' to appropriate regulating agencies. <br />In addition to inspections by Cooley personnel, the slope should he inspected at least twice in the first <br />' year and annually thereafter by a qualified engineer intimately familiar with rock slope design and <br />with Cooley's Morrison Quarry. Results of these inspections should be recorded in a field notebook <br />and included in regular reports to the regulating agencies by Cooley. <br />FYaley & Aldrich recommends that a surveying program be instituted to quantitatively evaluate <br />potential slope movement. The surveying program should include installation of an array of <br />' permanent surveying monuments both inside and outside the subject area. At least three permanent <br />bench marks should be established outside the potential zone of inFluence from which relative changes <br />in monument position can he surveyed. The monuments should be installed at the end of construction <br />' and surveyed immediately to establish baseline locations and elevations. Within the first year the <br />monuments should be surveyed every four months, and annually thereafter. Results of the surveying <br />program should be presented as tables or graphs showing the change in position for each monument <br />' over time. Furthermore, results should he included in regular reports to the regulating agencies by <br />Cooley. <br />' 13 <br />~ fc T~ <br />