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Twentymile Coal, LLC. <br />Page 6 <br />November 16th 2018 <br />no discussion about how TC will coordinate the discharge at sites 109 (potentially), 115 and the <br />6MN reservoir to comply with the sulfate standard. Please either explain how this will be done or <br />provide justification why it is not necessary. If no water supply uses are in place along lower <br />Trout Creek below the confluence of Fish Creek please verify this. No longer applicable to this <br />revision as discharge is not being proposed. <br />25. When the 6MN Reservoir is discharging please explain why increased monitoring along Trout <br />Creek is not necessary as it is when Site 115 and/or site 109 is discharging? No longer <br />applicable to this revision as discharge is not being proposed. <br />Items from 2"d Adequacy Review Letter <br />CPW's letter identified three recommendations. The first recommendation pertains to water discharge <br />that may impact Fish Creek that this project is specifically designed to address. Given this, the Division <br />does not have any additional requests based on this comment. The second recommendation is for <br />Twentymile Coal, LLC. (TC) to ensure the treatment ponds do not trap wildlife and prohibit wildlife from <br />exiting each pond. The third recommendation requests that TC preclude the use by livestock in all <br />wetland areas that are created as a result of this project. Given the second two recommendations, please <br />address the following items: <br />1. Based on your e-mail response when the Division forwarded you the CPW comment letter, you <br />indicated that the design of the pond had already taken the recommendations provided by CPW <br />into account. Please explain how the passive water treatment system was designed to not trap <br />wildlife and prohibit wildlife from exiting the ponds? Please update section 2.05.6(2) of the <br />permit with this discussion. Not yet addressed. <br />2. The Division agrees that the exclusion of livestock from the passive water treatment system <br />would be appropriate. Does TC intend to exclude livestock from the passive water treatment <br />system? If so, please explain how this will be done in section 2.05.3(3) of the permit. Not yet <br />addressed. <br />Items from 3rd Adequacy Review Letter <br />1. Please identify on all applicable maps the proposed pipelines, pipeline corridors, and light -use <br />road that will be required for this revision. Please ensure that all associated acreage is included in <br />the application, the reclamation plan, and the cost estimate. At this time it is not clear where the <br />input water will be coming from or what new pipelines are being proposed. <br />2. Please update Map 24 with inlet pipelines. <br />