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10/19/00 15:22 ^~ 303 2362896 7762896 NRCS CO ST OFF1C <br />USDA Un~fates Natural Me~ekf OlBce <br /> Department of Resources 655 aria( Street, rLn. E300 <br /> Agriculture Conservation Lakewood, CO 802155517 <br /> Service <br />Phone: 303 236-2903 x270 <br />October'19, 2000 <br />J.R. Phillips <br />Hardscrabbte 8 J.R. <br />'1203 Sherman <br />Canon City, CO 81212 <br />E+nail: Eugene.Backhaus@co.nra.usda.gov Fax: 303236-2703 <br />Re: Erosion Protection for Proposed Mining Operations <br />Dear Mr. Phillips: <br />Through the calculations that I am enclosing you will see that the expected erosion from the site <br />does not exceed the allovrable rate. Present soil loss estimated from wind and water are 1.2 <br />tons/acre and 1.6 tons/acre, respectably and the expected soil loss is 1.6 tonslacre from wind and <br />1.6 tonslacre from water. <br />Current plans that will maintain the sail losses at these levels include the installation of a 50-foot <br />grass buffer around the mining operation. Grass species of the buffer will be stiff stemmed <br />introduced and native grasses, i.e., intermediate wheatgrass and/or switchgrass. These grasses <br />will filter sediments from both wind and water while not have a high susceptibility to chemicals. <br />The other planned conservation measure is the installation of an earthen diversion. This <br />diversion will safely divert overland flows away from the mining operations onto a stable outlet <br />area. If necessary, the diversion can be seeded but should be alright as part of the farming <br />operation. <br />If you have any questions concerning these solutions, please contact me at the above address, <br />phone, or email. Thank you. <br />H. Backhaus <br />Conservationist <br />W~vvc <br />Tv Na1W Rmwrov ConwMm s. e. <br />corks Mr~0.Fiier4 riT N Nnercn Paape <br />m mvan. wiv.i R.wno. m prrvW bntl USDA IS AN EOUAL OPPORNNITY PROVIDER AND EMPLOYER <br />