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A. Please submit revised data sheets for the baseline surface water monitoring stations in PR-12. The <br />reporting periods should be as close as is possible to the time of the initial permit application. It <br />appears that there are baseline data for stream monitoring stations SW-1, 2, 4, 5 and 10 from 1983-84 <br />in Volume 4 of the permit application. Please include all recorded parameters, even if they are not <br />currently sampled. It also appears that the baseline data for the springs and ponds will need to be <br />obtained from the earliest possible annual hydrologic reports since there do not appear to be such data <br />in Volume 4. <br />Please attempt to use four consecutive quarters of data on the baseline data sheets to show seasonal <br />variation. If large gaps in time for the sampling periods are unavoidable, please demonstrate that the <br />sampling years have similar precipitation histories. If BRL wishes to also list minimums, averages <br />and maximums for both the baseline sampling periods and the operational sampling periods on the <br />same baseline data sheets, please separate the two sampling periods on the data sheets, as was done in <br />the June 1, 2010 submittal. The list of the four quarters of baseline data should be obtained from the <br />baseline sampling period, if at all possible. <br />As was also done on the June 1, 2010 submittal data sheets, please include the baseline and <br />operational dates and the dates of influence from mining. If the data are obtained from the AHRs, the <br />data may still be listed as baseline if the station or subwatershed has not been influenced by mining. <br />B. Surface water monitoring stations SW-7 and SW-8 and ponds 13-2 and 19-1 are listed in Table 2 of <br />Volume 4 as sites that will be reactivated if mining is restarted in the Bowie No. 1 East Mine but were <br />not included in PR-12. Referring to Map 9 for Bowie No. 2 and Map 4-1 for Bowie No. 1, however, it <br />appears that the upper reaches of the SW-8 drainage basin can be affected by mining. Therefore, the <br />Division requests that station SW-8 be reactivated. It is unclear if sites SW-7 and 19-1 can be affected <br />by subsidence since Map 27 does not show the extent of new subsidence. Please revise Map 27 to <br />show the extent of new subsidence along the southern end of the proposed mining area. Please include <br />SW-7 and 19-1 in the monitoring program if the drainage basin is affected by new subsidence. It <br />appears, however, that pond 13-2 will not be affected by the mining proposed in PR-12. <br />C. Surface water monitoring site SW-5 takes in the proposed Bowie No. 2 mine workings as well as the <br />old Bowie No. 1 workings south of the proposed Bowie No.2 workings. If Bowie No. 2 doesn't want <br />the Bowie No. 1 liability for the Bowie No. 1 workings, BRL can replace SW-5 with a surface water <br />monitoring site that is closer to but still down gradient of the proposed Bowie No. 2 workings. <br />However, seasonal baseline monitoring at the new site will need to be provided before the switch can <br />be made from SW-5 to the new monitoring site. <br />16. On revised page 2.04-32, BRL describes one down gradient monitoring well for the western mining <br />district located in the Terror Creek drainage (TC-03-03) and that they propose to install an additional <br />down gradient monitoring well (2010-1) during 2010. Existing well TC-03-03 monitors the sandstone <br />above the B- Upper Seam. BRL has not identified what the completion zone will be for the 2010-1 well. <br />Please add to page 2.04-32 a brief discussion of what zones will be monitored with each of these <br />monitoring wells. <br />This issue is resolved. Page 2.04-32 was revised in the June 1, 2010 submittal.