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Based on information provided by the DRMS, Castle Concrete originally investigated a <br />non reflective laser monitoring system from Lieca. However upon further analysis by <br />Lieca, a system utilizing prisms was determined to be more accurate based on the size of <br />the area being monitored and the accuracy required. <br />Lieca currently has in excess of 1100 similar units in mines located around the world. <br />There is only one other mine in Colorado currently using this technology. The heart of <br />the system is a TA 1800 Automated Motorized Total Station that is AC powered. This <br />unit will be located west of the shop and depiceted by the red star on Document 2 <br />Data will be digitally sent to a computer for monitoring. The data will by monitored by a <br />software package called Leica GeoMoS. GeoMoS Monitor is the online application <br />responsible for the sensor control, collection of data, computation and event management. <br />GeoMos Analyzer is the offline application responsible for the analysis, visualization and <br />post-processing of the data. Information will be monitored both pre and post shift daily, <br />The total station will be housed in an enclosure on top of a concrete pier that will be <br />anchored in bedrock and have a mounting plate for the station. This will isolate any <br />possibility of improper set up of the equipment. Leica Geosystems will provide drawings <br />as to the construction requirements. <br />The prisms that will be utilized as the reflective device are copper-coated reflective <br />prisms. It is estimated that between 25 to 30 units will be needed to accurately monitor <br />the slide. After the completion of the investigation by CTL Thompson, Lieca and CTL <br />will determine the exact locations of the prisms both on the slide and to the north, south <br />and west of the slide. <br />It is the general consensus that the important information is not that the slide is not <br />moving or has not moved, but if it is moving at what velocity. Leica has assured Castle <br />Concrete that the system configured as represented will provide the company the needed <br />information to safely monitor the Pikeview Quarry. <br />IMPLEMENTATION TIMELINE <br />Leica Geosystems will deliver the equipment to Castle Concrete by no later than April <br />21, 2009. With the construction of the enclosure and the pier the equipment will be <br />operational by April 30, 2009. Leica has not provided an exact date as to when their <br />traing personel will arrive but it is anticipated by the week of May 4, 2009 and be fully <br />operational within a couple of days.