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to the <br />• A discussion <br />extraction at <br />will occur at <br />• A discussion o <br />and lower (doc <br />mined channel <br />re-grade these <br />6.4.5 <br />limit of extraction. <br />sequencing of how extraction will occur in the channel azea with <br />of 5-6 feet below surface, vs. the non-channel azeas where extraction <br />of 15 feet below ground surface. <br />final reclaimed channel bed slope to occur at the upper (upstream) <br />eam) limits of disturbance so that there is a smooth transition from <br />to un-mined channel bed. (The Division recommends the Applicant <br />azeas to either a 4:1 or 5:1 slope). <br />2. Applicant has expressed an intent to mine the Larson Pit in three (3) distinct phases, with the <br />maximum distwbance to occur in Phase 1 with 33 acres of distwbance. In conformance with <br />Rule 6.4.5(2), please clarify the maximum volume (cubic yazds) of topsoil to be stockpiled, <br />maximum volume (cubic yazds) of backfill & grading required to achieve reclamation contours, <br />and acreage to be re-vegetated under this 33-acre maximum disturbance scenario. <br />3. In accordance with Rule 6.4.5(2)(f)(iv), please clarify the timing of when the sorghum cover <br />crop will be seeded, and when the final reclamation seed mix will be inter-seeded. <br />6.4.7 EXHIBIT G - <br />4. The Applicant Indic <br />groundwater is approx <br />designed to be a dry pi <br />depth of excavation to <br />operation. If the grow <br />backfill such excavatic <br />Please respond. <br />6.4.12 EXHIBIT L - <br />5. Please revise the <br />adequacy concerns. <br />6.4.13 <br />tes that the maximum depth of excavation is 15 feet, and that the depth of <br />nately 20 feet below ground surface. Since the mining operation is <br />with no goundwater exposed, please provide a commitment to limit the <br />io more than two (2) feet above groundwater at any time throughout the <br />lwater surface is intersected at any time, the operator must immediately <br />i to provide a minimum cover of 2 feet above the groundwater surface. <br />L -Reclamation Cost as necessary based on responses to other <br />6. Attached aze copies ~of comment letters received from the Colorado Historical Society, Office <br />