2024-03-28_REVISION - M2015030 (2)

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Chavers Mining Resource DRMS Permit No.M-2015-030 Amendment No.2(AM-02) March 2024 Page 14 Based on this seed mixture, an application rate of approximately 20.0 to 28.0 pls/ac will be used. Due to the common use of these grass species in the area, the availability of viable seeds in sufficient quantities is not considered to be an issue. Soil will be disced prior to seeding. Fertilizer be utilized in conjunction with seeding.A standard application of fertilizer will be used and applied at an appropriate rate (e.g., 250 lbs./acre). The total area to be seeded and fertilized is approximately 75 acres. Seeding and fertilizing will be completed as soon as possible after the overburden soil is backfilled, smoothed to conform to the reclamation topography, and the final layer of topsoil is placed and disced. Optimal periods of seeding are in the fall, before the first freeze (before November 1st) or in the spring from late-March up to April 30th. A standard application of straw mulch will be used and applied at an appropriate rate(e.g., 2 tons/acre)to the approximately 75 acres. Following revegetation,weed management strategies will be implemented to facilitate and achieve native grassland. Quarterly inspections to monitor revegetation progress and identify weed infestations will be conducted until the reclamation bond is released. ASCI will implement cultural, mechanical, and biological control methods including an aggressive mowing program to prevent the growth and establishment of weeds as mandated by Colorado State Law (C.R.S. Title 35 Article 5.5 Colorado Noxious Weed Act). If needed, chemical/herbicide application will be applied to further control weed infestations. 6.4.5 (2)(e) Schedule for Implementation Reclamation backfill will occur concurrently with mining wherever possible to backfill material into previously mined areas. Temporary stockpiling of backfill materials may occur for short durations. Reclamation Phase 1: Backfill will be completed as soon as possible after mining is complete,but no later than 5-years from notifying DRMS that extraction of material and stockpile removal is complete. Based on the current estimates, Reclamation Phase 1: Backfill is anticipated to be complete within approximately three (3) years after mining is complete; however, this is subject to change pending future market conditions. ASCI will complete backfill within 5-years of the date the extraction of material and stockpile removal is complete. Reclamation Phase 2: Grading, Topsoil, Seeding, and Growth Monitoring will be completed as soon as possible after backfilling is complete,but no later than 5-years from notifying DRMS that backfill Reclamation Phase 1: Backfill is complete. 6.4.5 (2)(f) Description of Reclamation Details (i)Final Grading—Reclamation of affected lands at the Site will be graded to the minimum requirement of one(1) foot above the historic high measured water table elevation,but not to exceed pre-mining elevations. The slope gradient is anticipated to range from 0.1% (minimum) to 1% (maximum). The approximate maximum final contours of the site are shown on Exhibit F - Reclamation Plan Map.