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not necessarily need to be located beneath the ECOSA footprint. <br /> RESPONSE.Please refer to responses provided by ABC, which are provided in <br /> Attachment 1,pages 7, 11, and 14 to this response. <br /> Please ensure all cross-sections show shallow bedrock groundwater, groundwater flow <br /> direction, and indicate the saturated zone (either visually or in notes provided on <br /> the cross-section). These cross-sections should provide a unifying picture of the <br /> hydrogeology of the area specified, showing the relationships between the ECOSA, <br /> the ECOSA underdrains, Grassy Valley Creek, the contact between the diatreme and <br /> Precambrian rocks, and the additional features shown on Plate 9 (Rev. 1) and Plate <br /> 17 (Rev. 1), with the local groundwater regime. <br /> RESPONSE: Please refer to responses provided by ABC, which are provided in <br /> Attachment I to this response. <br /> 3.6.6 Impact of East Cresson Overburden Storage Area on the Hydrology of Grassy Valley <br /> 13) The Operator's response indicates the ECOSA underdrain system is functioning properly <br /> to route infiltration from disturbed areas located outside of the diatreme,to the diatreme. <br /> The Operator's response also indicates the ECOSA underdrain system is designed <br /> to conduct water which will seep through areas underlain by Precambrian rock to <br /> areas underlain by diatremal rock. Pursuant to Rule 3.1.5(11), no unauthorized <br /> release of pollutants to groundwater shall occur from any materials mined,handled, or <br /> disposed of within the permit area. The purpose of the ECOSA underdrain system <br /> is to direct potentially impacted water (infiltrating ECOSA materials) to the <br /> diatreme. Therefore, please specify the maximum flow rate of the ECOSA underdrain <br /> system (based on the as-constructed survey), and the maximum infiltration rate and <br /> volume of areas drained by the system. <br /> RESPONSE: Please refer to responses provided by ABC, which are provided in <br /> Attachment 1,pages 8 and 16 to this response. <br /> Appendix 2—Hydrologic Evaluation, CC&V/December 2015 <br /> 26-62) Please be informed the Division's approval of Revision No.AM-I I would not constitute <br /> permanent approval of the compliance monitoring stations presented in the application. <br /> Pursuant to Rule 3.1.7(6)(b)(ii)(B), the Division may require modification for points <br /> of compliance. <br /> RESPONSE: Comment is acknowledged. Newmont understands that the Division may <br /> require modifications for points of compliance. CC&V assumes modifications to <br /> compliance monitoring may be handled by way of a Technical Revision per Rule <br /> 3.1.7(5). <br /> Page 3 of 8 <br />