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<br /> <br />prohibited by stipulation until all the issues are resolved. <br />BRL Response (2/20/2001) <br />A discussion of the worst possible consequences of mining, as the mining progresses <br />towards Terror Creek reservoir was added to page 2.05-103. <br />DMG response <br />They have indeed added the worst possible consequence to the permit [ext. Obviously, <br />this would be material damage and a threat to public health and safety if the dam were to <br />breech due to mining or mine-induced seismicity. Therefore, a subsidence control plan is <br />required. Since the operator doesn't know what the seismicity will be (since they haven't <br />begun the study proposed under #2) they can't submit a subsidence control plan. Check <br />of the mine plan maps indicate longwall mining will never take place inside aone-mile <br />radius of the Bruce Park dam. Although it would appear that mining could proceed as <br />planned without prohibition, the data collection and monitoring plan has yet to be <br />determined. Therefore, I would recommend that the submittal slated for August I, 2001 <br />is stipulated as a technical revision to allow for review and approval by the appropriate <br />parties. You indicated you would discuss with David Berry. <br />The proposed dates look fine to me. Please be aware that as part of the future seismic <br />monitoring, the Division will ask for collection of data at specific distances from longwall <br />mining (which panel may not be important) that records the magnitude of ground <br />movement (or shaking) at the various distances. This data will give us some limited <br />insight into the range of ground motions that are taking place at longwall operations <br />throughout the state. Reviewing a technical revision as discussed above would benefit us <br />in this regazd. <br />Resolved previously. <br />4. Rule 2.05.6(6)(c)(i)(E) requires subsidence monitoring data to be submitted "at least" on <br />asemi-annual frequency. Please revise [he text to commit to semiannual submittal no <br />more than 60 days following the monitoring period. <br />BRL Response <br />Page 2.05-112(113) was amended to indicate a subsidence report will be submitted to the <br />Division the end of June and December for the preceding six-month period. <br />DMG Response <br />Does the operator really want to submit the report the day after the reporting period ends? <br />I think the deadline for submittal should be 30 days after [he reporting period ends to give <br />