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COLORADO LEGACY LAND <br /> M-1977-300 APPLICATION AMENDMENT#5,COMMENT AND RESPONSE SUMMARY"1"ABLE <br /> COMMENT NO. COMMENT RESPONSE TO COMM "1' <br /> The description of Adit Backfilling by Rockfill provided in Section <br /> EA identifies the placement depth with the following text,"The <br /> outermost one foot(1')of backfill shall consist of suitable plant- <br /> rowth medium." <br /> Revised as requested. The soil will be sourced locally from the <br /> site. <br /> Exhibit E-Reclamation Plan(Rule 6.4.5)Please identify the <br /> anticipated location on site from which the Plant Growth Medium The text"During the alluvial valley excavation project,clean <br /> will be derived.The Division requires this information in order to materials for rockfill closure (soil,and rock) have been identified <br /> 3f estimate the haul/push distance for the bond calculation.If the and set aside during excavation work. These native,clean <br /> operator anticipates importing growth medium to the site for materials shall be used to backfill the entrance and escape portal <br /> reclamation,please state as such in this exhibit and be sure to to the Black Forest Mine."has been added to Section EA for <br /> include costs for importing this material in the Exhibit L bond clarity. <br /> estimate. <br /> Estimated distances are included in the"Notes/Basis of <br /> Estimate"section of Table L-2. <br /> Exhibit E-Reclamation Plan(Rule 6.4.5)Please provide an Revised as requested. An estimated 0.1 acres will need to be <br /> 3g estimated acreage to be seeded in the backfill area. reseeded. This value is listed in the"Quantity"section of Table L- <br /> 2. <br /> Exhibit E-Reclamation Plan(Rule 6.4.5)The operator estimates <br /> the Black Forest Mine to have a capacity of approximately 15,000 CY. <br /> It is the Division's understanding the majority of this capacity may <br /> need to be utilized in order to complete the alluvial excavation <br /> project as planned.Therefore,the Division requires additional <br /> information on the placement of this material into the mine, <br /> particularly how far the operator expects to place the backfill Revised as requested. Figure E-2 has been added to AM-05 <br /> material up to the mine opening gates.Please describe the depicting the conceptual cross section of a backfilling closure. <br /> anticipated interface between the edge of the backfilled <br /> 4 The figure includes the proposed types of material(e.g.,Rock, <br /> contaminated alluvial materials inside the mine and the gated mine Common Fill,Plant Growth Medium)and approximate placement <br /> openings.Does the operator propose backfilling the mine up to the depths of this material. <br /> gates,or will there be some space left between the toe of the backfill <br /> and the gates?If so,please provide the estimated buffer distance <br /> proposed.The Division is particularly interested in the anticipated <br /> interface between the contaminated alluvial materials placed inside <br /> the mine and the proposed backfill materials to be placed against the <br /> gates of the mine openings.The Division believes these interfaces as <br /> well as the proposed backfill plan would be best depicted in a <br /> PAGE 5 of 10 <br />