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RPM,Inc. <br /> October 5, 2023 <br /> Colorado Division of Reclamation, Mining and Safety RECEIVED <br /> Attn: Mr. Joel Renfro OCT 10 20?3 <br /> 1001 E. 62nd Ave., Rm 215 <br /> Denver, CO 80216 Colorado Division of Declamation, <br /> Mining and Safety <br /> RE: Technical Revision—Seed Revision, Permit No. M2009-077, Dill Pit <br /> Dear Mr. Renfro, <br /> Thank you for giving us the opportunity to revise our Dill Pit reclamation seed mix. Attached to <br /> this submittal is a check in the amount of$216.00, Technical Revision Application, and <br /> explanatory attachments. <br /> One of the attachments is the Ecological Site Descriptions (ESD)for the two soils units. It lists <br /> the dominant plant species by category. We included five native grass species and one native <br /> forb, purple prairie clover. <br /> Please note we have kept most of the species from the original approved seed mix. However, we <br /> deleted scarlet globemallow and Indian ricegrass. We reduced the seeding rates for purple prairie <br /> clover and sand bluestem. We increased the seeding rate for sideoats grama. We intend to use <br /> the same varieties as currently listed as available. (Different varieties of the same plant species <br /> have differing characteristics which can result in improved establishment.) Given the relatively <br /> small number of acres involved, we believe the surrounding native species will reinvade the site <br /> over time. Therefore, the main goal is to ensure site stability and provide for the post mining land <br /> use, rangeland. Given all the proposed species are native to the site,based on the ESD, we <br /> believe the mix should do well in terms of site stabilization and not hinder the establishment of <br /> the other listed ESD species. Please see the new Plant Species Table below. <br /> The overall seeding rate is 9.25 pounds of pure live seed per acre, versus what you provide in the <br /> bond calculation worksheet titled, "Vegetation Work", of 10.5, PLS, lbs./acre. <br /> RPM.Inc.. 25049 E.Alder Dr.,Aurora,CO 80016 Phone:(303)854-7499 Email:hlhumphries2@comcast.net <br />