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Preliminary Adequacy Issues for CN-01 5 <br />May Day Idaho Mine Complex <br />(a) The Division has determined some of the proposed mining activities pose minimal <br />potential to affect surface or ground water quality. Such activities may commence <br />after the issuance of CN-01 and prior to the Division's approval of adequate <br />hydrologic information for surface and ground water. These activities are limited to <br />the following: <br />• Stabilization and reconstruction of illegal access road from County Road 124 <br />to bridge; <br />• Grading of pre-existing access roads not defined as affected lands; <br />• Installation of storm water management structures; <br />• Excavation of the collapsed portal at May Day 1 level and establishment of a <br />stable highwall and mine bench at the May Day 1 level; <br />• Removal of soil, rock and mining related debris from the drainage channel of <br />Little Deadwood Gulch at the Chief Portal and May Day 2 level; and <br />• Corrective measures as necessary to comply with enforcement actions issued <br />by other agencies, with written approval from the Division. <br />(b) The Division has determined some of the proposed mining activities pose significant <br />potential to affect surface or ground water quality. Such activities may not <br />commence until the Division receives and approves hydrologic information adequate <br />to fully characterize baseline conditions for surface and ground water, and a <br />hydrologic monitoring plan sufficient to verify compliance with water quality <br />regulations. These activities, which cannot commence until hydrologic baseline <br />conditions have been approved by the Division through a permit modification, <br />include the following: <br />• Mill retrofit and commissioning; <br />• Ore stockpile consolidation; <br />• Construction of the augmentation pond; <br />• Milling optimization (Phase 2); <br />• Production at May Day 1 level (Phase 3); <br />• Exploration (Phase 4); <br />• Production expansion (Phase 5); and <br />• Milling completion and closure (Phase 6). <br />(c) The Joint Stipulation was written prior to the current version of the Rules and the <br />reference to Rules 6.4.20(9) and (11) now correspond to Rules 6.4.21(9) and <br />6.4.21(11). <br />Please revise Exhibit D, Mining Plan, to acknowledge the permit conditions imposed by <br />paragraph (3)(b) of the Joint Stipulation, as clarified in this adequacy item. <br />15. Exhibit D of the application refers the reader to Exhibit 6.5, for the work plan addressing <br />construction and stabilization of the illegal access road.