2014-05-19_REVISION - C1996083 (2)

Home Browse Search

William A. Bear Page 6 of 9 May 19, 2014 of any perennial stream, requiring that the area be designated a stream buffer zone and that buffer zone markers (per Rule 4.02) be installed and maintained. Accordingly, the Division will require BRL to establish a stream buffer zone of 200' from the normal high water line of the West Fork of Terror Creek. Additionally, prior to any surface disturbance in the vicinity of the West Fork of Terror Creek, BRL must install the stream buffer zone markers required by Rule 4.02. 27. Please update Maps 09,15-1,15-2,15-3, and 15 -4 to include the designated stream buffer zones required by Rule 4.05.18 for all perennial streams and intermittent streams or ephemeral streams draining an area greater than one square mile within the permit area boundary. 28. Revised pages 2.05 -104 and 2.05 -172 commit to the establishment of at least two subsidence monitoring gridlines across the West Fork of Terror Creek. BRL does not specify the locations of these proposed gridlines. Please provide the locations of these gridlines on Map 278. Please also revise the text to indicate that the initial survey will be conducted and the data submitted to the Division at least six months prior to longwall mining beneath the area, and semi - annually thereafter. 29. Revised page 2.05 -108 discusses water rights within the permit area and summarizes their relationship to the mining area, and whether there are any anticipated impacts from mining to those water rights. The Terror Ditch is not discussed in this section, nor are potential impacts to the ditch discussed in Section 2.04.7(3). Please revise page 2.05 -108 to include a discussion on what, if any, impacts BRL anticipates occurring on the Terror Ditch as a result of the mining planned in the PR -14 expansion area. 30. Please update the Probable Hydrologic Consequences section of the permit, beginning on revised page 2.05 -115, to include a discussion on the potential impacts from undermining to the West Fork of Terror Creek. 31. Because the undermining of the West Fork of Terror Creek may result in flow interruptions, potentially impacting the rights of users of the Terror Ditch (Rule 2.05.6(3)(a)(ii)), the Division will require more frequent monitoring of flow conditions on the West Fork of Terror Creek. More frequent monitoring will ensure that the monitoring plan is based on and appropriate for the probable hydrologic consequences determination, as required by Rule 2.05.6(3)(b)(iv). Please update pages 2.05 -126 and 2.05 -169 to commit to weekly monitoring of field parameters on the West Fork of Terror Creek during active subsidence, as each panel passes beneath the creek, and monthly monitoring of field parameters three months prior to and six months following extraction. Quarterly monitoring, as proposed on revised page 2.05 -126 is appropriate three months before and six months after mining has advanced into and beyond the projected angle of draw beneath the creek.