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and the proposed monitoring frequency. <br />NC: Page 14 of the Volume IX text in the application states, in essence, that quarterly <br />inspection reports will provide a summary of instrumentation monitoring on CMWDA2, <br />including a discussion of the vibrating wire piezometer data. This data will determine if the <br />measured pore pressures are relatively stable, and consistent with those incorporated into the <br />TR-56 BGI report. The Operator commits to having a geotechnical engineering firm <br />continue instrumentation monitoring on a quarterly basis. Installation of any additional <br />vibrating wire piezometers is proposed to be at the discretion of the geotechnical engineering <br />firm. <br />1. While specific details ofpiezometer location and/or modification have not been <br />provided, the Operator has committed to the utilization of a geotechnical firm for <br />monitoring of the piezometers and for determining the necessity of additional <br />piezometers. In accordance with the recommendations of the BGI TR-56 report, please <br />revise the monitoring frequency to be a minimum of once per quarter. <br />Inclinometers <br />OC: Three inclinometers were installed in August 2005, and have been periodically <br />monitored since that time. Data acquired from the instruments indicates no failure planes <br />have developed, nor does down-slope creep appear to be occurring within CMWDA2 <br />Please describe the proposed on-going monitoring plan for use of inclinometers, including <br />the locations of any new inclinometers and the proposed monitoring frequency. <br />NC: Page 14 of the Volume IX text in the application states, in essence, that quarterly <br />inspection reports will provide a summary of instrumentation monitoring on CMWDA2, <br />including a discussion of the inclinometer data. The Operator commits to having a <br />geotechnical engineering firm continue instrumentation monitoring on a quarterly basis. <br />Installation of any additional inclinometers is proposed to be at the discretion of the <br />geotechnical engineering firm. <br />2. While specific details of inclinometer location have not been provided, the Operator <br />has committed to the utilization of a geotechnical firm for monitoring of the <br />inclinometer and for determining the necessity of additional inclinometers In <br />accordance with the recommendations of the BGI TR-56 report, please revise the <br />monitoring frequency to be a minimum of once per quarter. <br />Construction <br />OC: Section 6.0 of the BGI report includes specific recommendations regarding placement <br />of coal mine waste in the approved slope configuration of 3H:1 V. <br />2