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2. The "Geotechnical Data Report Bruce Park Dam" and "Addendum" are in Volume X and consist <br />of evaluations of the geotechnical characteristics of the Bruce Park Dam and adjacent landslide. <br />The evaluations were used in conjunction with the following mine-induced seismicity study to <br />determine the integrity of the Bruce Park Dam and Terror Creek Reservoir under seismic effects. <br />3. The "Geotechnical Evaluation of Mine-Induced Seismicity on Bruce Park Dam" can be found in <br />Volume X and is an evaluation of the possible effects of mine-induced seismicity on the Bruce <br />Park Dam and adjacent landslide. <br />4. An additional evaluation of the seismic effects on the landslide was made in the "Final <br />Geotechnical Investigation and Evaluation Report" for the Bruce Park Dam and is filed in Exhibit <br />20 of Volume IIIA. <br />The "Seismic Monitoring Network at Bowie Resources Longwall Coal Mine" is filed in Exhibit <br />18 of Volume IIIA and describes the seismic array that is being used to monitor seismic activity. <br />6. The "Seismic Monitoring - Summary Statement" in Exhibit 18 of Volume IIIA describes the <br />seismic monitoring program and includes a discussion of the threshold event that will trigger an <br />inspection of the dam. Bowie has committed to this inspection if the peak horizontal acceleration <br />(PGA) value of 0.05g is reached or exceeded, as recorded at the seismic station that is adjacent to <br />the dam (station TCR). <br />7. The "Geotechnical Monitoring Plan for the Bruce Park Landslide" found in Exhibit 20 of Volume <br />IIIA, describes the sensor array system in place on the landslide mass and the response plan that <br />will be initiated if movement of the landslide triggers the alarm. An alert will be sounded if a <br />movement of 0.1 inches occurs in any 12 hour period. If an alert is also sounded during the <br />following 12 hour period, and credible evidence suggests significant movement, than an on site <br />inspection of the landslide will be performed. If the movement is found to be real and is in excess <br />of 0.2 inches per 12 hours, the information will be reported and field personnel will remain on <br />site. E-mails and text messaging will notify the appropriate personnel of the alarms. <br />8. Bowie Resources is submitting quarterly monitoring reports on the seismic network. The reports <br />are filed in Exhibit 18 of Volume IIIA. <br />9. Permit application text in Section 2.04.7 of Volume I, pages 2.04-22 through 2.04-40, was revised <br />to describe the ground water baseline and operational monitoring situation. <br />10. The HydroGeo technical memo "B-Seam and Strata Above B-Seam Water Quality Analysis, <br />Bowie Coal Mine", found in Exhibit 3 of Volume III, was submitted in support of Bowie <br />Resources' contention that no further ground water monitoring wells are needed down gradient of <br />the proposed B-seam workings. Using this information and the revised text in Section 2.04.7 of <br />Volume I and revised Map 10 and Map 11 in Volume II, Bowie was able to show that the current <br />baseline and operational ground water quality for the B-seam and above the B-seam will not vary <br />significantly from south to north. <br />11. The "Stability Evaluation of Third North Mains - Hubbard Creek Study Area" is filed in Exhibit <br />16 of Volume IIIA and demonstrates the long term stability of the room and pillar mains under a <br />portion of Hubbard Creek that are proposed in PR-10. This proposed plan was later modified in <br />PR-I 1 so that there will be no undermining of Hubbard Creek. <br />20