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YnObed Stiates Depsrdssen! of Agrlcukune <br />0 MRCS <br />Natural Resources Conservation Service 7~ <br />Brighton Service Center <br />57 W. Bromley Lane <br />Brighton, Colorado 806013025 <br />303-659-7004 -Office <br />303-659-1768 -Fax <br />www.co.usda.gov <br />July 13, 2004 RECEIVED <br />State of Colorado JUL 21 2004 <br />Division of Minerals and Geology's Division of Minerals & Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Attn: Larry Oehler, Environmental Protection Specialist <br />Subject: Proposed Surface Extraction of Construction Materials and Reclamation, Regular (112) / <br />Permit Application, Aggregate Industries - WCR, Tucson South Resource, File No. M-2004-044 ,t/ <br />The West Adams Soil Conservation District has requested assistance from our agency in <br />reviewing the subject new proposed Mining and Reclamation Permit application to mine sand <br />and gravel on approximately 167 acres of a 291 acre site near Brighton, Colorado. Reclamation <br />of the site will be completed to reclaim the affected land to municipal water stor a reservoirs <br />and upland/wet meadows. We have the followin comments and recommendations n this <br />application. <br />Reclamation Plan <br />Water Storage Reservoir <br />The Reclamation map states that all reservoir final slopes will be reclaimed to a maximum of <br />3H:1 V. It is recommended that the final reservoir slopes be no steeper than 3:1, and preferably <br />less steep such as 4:1 or 5:1, to permit eventual use of the reclaimed water storage reservoir by <br />wildlife. Steep slopes such as 3:1 can discourage wildlife from approaching and using the water <br />reservoir. <br />To soil <br />The NRCS recommends, as planned by the applicant, that topsoil stockpiled for reclamation be <br />segregated from other spoil. The topsoil and overburden stockpiles should be graded with final <br />slopes no steeper than 4H:1 V. Slopes that are less steep allow easier maintenance, are less <br />susceptible to water erosion and more readily establish grass protective cover. <br />It is highly recommended that topsoil and overburden stockpiled over 30 days be seeded <br />immediately as weather permits to protect it. The immediate seeding of these stockpiles should <br />be done to avoid soil erosion from wind and water, as well as from a weed standpoint. Weeds <br />The Natural Resources Conservation Service provides leadership in a partnership effort to help people <br />conserve, maintain, and improve our natural resources and environment <br />