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11 . Design Protective Measures - Measures to protect the waste <br /> piles from potentially damaging flood flows, were designed for the remain- <br /> ing mine life and for after closure and reclamation. Channel gradients, <br /> linings and check structures are recommended. <br /> 12. Report Preparation - Results of the geotechnical and <br /> hydrologic/hydraulic analyses are presented in this report. <br /> 13. Meetings with Cotter Corporation, MLRD and Attendance at <br /> Mined Land Reclamation Board Hearings - Several meetings were held <br /> with representatives of Cotter Corporation and an interim work <br /> progress discussion was conducted with the MLRD to discuss the geotech- <br /> nical and hydrologic/hydraulic approach to the stability analysis. <br /> 3.0 SITE CONDITIONS <br /> 3.1 Geology <br /> The Schwartzwalder Mine and the adjoining surface facilities <br /> are located in the steep-sided canyon of Ralston Creek northwest of <br /> Golden. The valley trends in a northwest-southeast direction in the <br /> vicinity of the mine. <br /> The mine area is located on the eastern end of the Rocky Mountains <br /> geologic province; the Ralston Buttes, which are located just east of the <br /> mine, have been formed by sedimentary rocks of the Hogback. <br /> Bedrock formations underlying the valley and both its sides are <br /> formed by Precambrian gneisses and schists of the Idaho Springs Forma- <br /> tion. In addition to the bedrock formations, alluvial and colluvial <br /> soils have been identified in the valley and on both its sides. Man- <br /> made fills such as fills covering the alluvial deposits of the creek <br /> - 6 - <br />