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:..:..:. <br />Cliff Schmid Surveys <br />PROFESSIONAL LAND SURVEYORS <br />OFFICE !0}217-17l9 777 M4M AVE. Fe 222 <br />MOPE SO!-lSS-~92! pa+w+Oq COIA 61326 <br />June 1, 1987 ~ ~ ~ ~~~ <br />JUL G 1987 <br />Peter V. O'Connor, Reclamation Speclallst <br />Mined Land Reclamation Division MINED LAND <br />Department of Natural Resources RECLAMATION DIVISION <br />923 Centennial Building <br />1313 Sherman St. <br />Denver, Co. 8$'0203 <br />Re: High Wall Reclamation, Arness-McGriffin Mine; File Vo's. 77-3-UG <br />(and C-81-042> <br />Dear Mr. O'Connor: <br />In reply to yours of May 22, 1987 to Sam Arness, operator of the <br />subject mine, I wish to present the Following which, it is hoped, <br />will alleviate any concerns regarding the reclamation of the high <br />wall and related aesthetics within the PERFORMANCE STANDARDS of Rule <br />4, and, in particular, Rule 4.14.5 (2)(e) and Rule 4.15 REVEGETATION. <br />In reply to Dr. Pendleton's concerns, the existing slopes <br />surrounding the cut of the high wall are approximately 1.25 1. The <br />orlglnal slopes are stable due to the natural and structural geology <br />of the bedding planes o£ the sedimentary materials, and, the lack of <br />hydraulic action of water. Hence, soil erosion would be solely due to <br />the atmospheric source and not to seepage and would be at a minimum <br />effect. due to this area's grid history. Sparce vegetation .supplements <br />this geology with its soil retention capacity. The Eace with a 70~ <br />slope is an ideal structure upon and against which to place compacted <br />reclamation soils. Due to the cut, it is impossible to restore the <br />original contour without massive importation of material. With this <br />in mind, let me propose an alternative Eor the aesthetics of the high <br />wall. <br />I propose that the high wall be equally divided vertically into <br />equidistant benches each of which would be about ten Eeet in width as <br />shown on Exhibit A attached and incorporated herein. The benches <br />would be in sloped, and gently sloped to the center of the bench, in <br />order to provide maximum water for the revegatation effort. The <br />benches would be built as terraces and this technique would provide <br />for a minumum disturbanc~a to the area. The benches would be <br />constructed according to Rule 4.1.4 and in particular Fule 4.14.4 ~2) <br />(b ). While this proposal yet exceeds the specified slope requirement <br />of said rule, it is less than the surrounding natural slopes and not, <br />