2007-06-06_REVISION - C1996083 - Laserfiche WebLink

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these new upgradient water monitoring locations, baseline water monitoring, similar to that performed for the current stream stations, will be needed, per Rule 2.04.7. Also, please revise the permit text and maps where appropriate. BRL pointed out that there are already two surface water monitoring stations up gradient of the proposed mine workings. Station D34-14 is located on Hubbard Creek and station D32-4 is along Terror Creek. However, the flow at these two sites is recorded at USGS stations which do not record flow during the winter and early spring months. In an e-mail dated February 22, 2007, the Division requested that additional flow measurements be made during the winter and early spring months of 2007 at these two sites in order to complete the baseline monitoring requirement of Rule 2.04.7(2)(b)(i) for flow. Please provide an update on any additional winter monitoring performed by BRL at these two sites. 4. Rule 2.04.7(3) requires alternate water supply information if contamination, diminution or interruption of a surface water source may result from the effects of mining, Since mining effects could damage the main and saddle dams of the Terror Creek Reservoir, as stated in Section 2.05.6(6)(b)(i)(C) of the revised permit text, please revise this section of the permit test to include an appropriate discussion concerning the Terror Creek Reservoir. BRL responded in the December 28, 2006 cover letter that they were revising the statement of the worst possible consequences in Section 2.05.6(6)(b)(i)(C) to state that the Bruce Park (Terror Creek) Reservoir and dam should not be affected by mining operations. This determination is based on BRL's subsidence and seismicity studies. Therefore, alternate water supply information under Rule 2.04.7(3) is not needed. However, with this change in the worst possible consequences statement for the Bruce Park Dam and Terror Creek Reservoir, four items need to be addressed in the permit application. First, a discussion under Section 2.05.6(6)(b)(ii) needs to be added to the permit application text to explain that, because the worst possible consequences has determined that there would not be any material damage to or diminution of use for the Bruce Park Dam and Terror Creek Reservoir, BRL has prepared a seismic and subsidence monitoring program per Rule 2.05,6(6)(c). Second, a discussion pertaining to Rule 2.05.6(6)(c) needs to be added to the permit application text for the seismic and subsidence monitoring programs designed exclusively for the Bruce Park Dam and Terror Creek Reservoir. Third, since the Bruce Park Dam is a class one dam, the Division requests that a statement be added under Rule 2.05.6(6)(d)(i) that a subsidence control plan per Rule 2.05.6(6)(f) for the Bruce Park Dam and Terror Creek Reservoir is included in the permit application as a contingency plan in case the subsidence monitoring program shows that material damage to the dam and/or reservoir is occurring. Fourth, under Rule 2.05.6(6)(f), please add the details of a subsidence control plan for the Bruce Park Dam and Terror Creek Reservoir to the permit application text. However, it should be made clear in the text for each rule citation that the subsidence control plan for the Bruce Park Dam and Terror Creek Reservoir would be required only if the monitoring program under Rule 2.05.6(6)(c) shows material damage or diminution of use. 2