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i <br /> Environment, Inc. Page 4 <br /> Adequacy Response#3 June 26, 2020 <br /> M-2020-007 <br /> greyed out are not used in the Working Bond calculations since they are <br /> covered by the Floating Costs or because they would not be needed if mining <br /> ended before that cost was needed. So in Phase 1, the total bank armoring <br /> is not used in the Working Bond because LGE will be armoring as they go, and <br /> the armoring cost is included in the floating costs. In Phase 3, the slurry <br /> wall liner is not used because no groundwater will be exposed as long as it is <br /> being used as the Plant Site. The data provided for Phases 2 and 2A are <br /> not used in the working bond because they will not be disturbed at this time, <br /> and not until Phase 1 is nearing completion. Prior to any work in those <br /> Phases, LGE will work with the Division to process a bond revaluation. <br /> DRMS assumes Phase 3 area will be stripped of�opsoil and utilized as the plant area until the <br /> last phase of mining. Groundwater will not be exposed in this area for several years; therefore, <br /> bonding for surface reclamation will be sufficient at this time provided that the required topsoil <br /> is stockpiled nearby. Permittee will need to bond appropriately to install slurry wall and reclaim <br /> as lined reservoir prior to exposing groundwater in this area. <br /> This is correct, and LGE understands the requirement to bond for the slurry <br /> wall prior to exposing groundwater in Phase 3. <br /> Line items provided such as: re-sloping working face to 3:1 if required; mob/demob; dewatering <br /> costs; and weed control, can be included as-is. Costs for backfilling of cells and replacement of <br /> topsoil where required should be based on total CY needed, and push distances from the <br /> appropriate stockpile locations should be included. Acreages should be provided for crop <br /> planting and revegetation tasks, and for ripping/grading tasks. <br /> The bonding costs table labeled "Floating Cost" reflects this idea. Thank you <br /> for the suggestion. <br /> The required bond for affecting the eastern portion of the permitted area(Phases 4-6) will need <br /> to be calculated and posted prior to any mining d}sturbance in that area. <br /> LGE understands this requirement and will provide the necessary information <br /> prior to moving in those Phases <br /> Additional Information: <br /> Any letters from other commenting agencies/entities received by the Division for this permit to <br /> date are available for review through the imaged document data link provided below, or through <br /> the DRMS website. https://www.colorado.gov/pacific/drms/data-search <br /> The response for the Geotechnical Stability analyses is attached. <br />