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Bowie No. 2 Mine <br />TR-56 Implementation <br />07 Nov 2008 <br />Page 2 of 2 <br />Please describe the proposed on going piezometric monitoring plan, including the <br />locations of any new piezometers to be placed, any anticipated modification of existing <br />piezometers, and the proposed monitoring frequency. <br />Inclinometers - Three inclinometers were installed in August 2005, and have been <br />periodically monitored since that time. Data acquired from the instruments indicates no <br />failure planes have developed, nor does down-slope creep appear to be occurring within <br />CMWDA2 <br />Please describe the proposed on going monitoring plan for use of inclinometers, <br />including the locations of any new inclinometers and the proposed monitoring <br />frequency. <br />Construction - Section 6.0 of the BGI report includes specific recommendations <br />regarding placement of coal mine waste in the approved slope configuration of 3H:1 V. <br />Please detail the proposed methods of placement of coal mine waste, in accordance <br />with BGI's recommendations. <br />Analysis of Monitoring Data - BGI's stability evaluation report recommends that <br />monitoring of CMWDA2 with piezometers and inclinometers be continued. Utilization <br />of the monitoring data collected was not discussed in the report. <br />In the upcoming Technical Revision, please describe, as a minimum: <br />• How the monitoring data collected will be used <br />• Measurements (of pore pressure or inclination) that might indicate any <br />potential instability in the CMWDA2 configuration <br />• Proposed mitigation of any potential or actual stability issues <br />• How often and by what means data will be reported to the Division