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Schwartzwalder Mine Permit Amendment Application <br />RULE 6.5 - Geotechnical Stability Exhibit <br />A geotechnical stability study for the waste rock piles was prepared by McDermid Engineering Associates <br />and Geo -Hydro Consuting, and was submitted for the 1983 Mine Plan Amendment. The facilities were <br />constructed as designed, and reclamation was completed in 2004. <br />McDermid Engineering Associates, Inc. and Geo -Hydro Consulting, Inc., 1983a. Schwartzwalder Mine <br />Waste Rock Pile Stability, February, 1983. <br />McDermid Engineering Associates, Inc. and Geo -Hydro Consulting, Inc., 1983b. Responses to State of <br />Colorado Mined Land Reclamation Division Comments on Waste Pile Related Portions of Permit <br />Amendment Application, July, 1983. <br />A geotechnical reconnaissance study for the upper cutoff wall was prepared by Kumar Associates in <br />August 2011. The report was submitted to the Division in 2011. <br />Kumar and Associates, Inc., 2011. Geologic Site Reconnaissance, Upstream Cutoff Wall Schwartzwalder <br />Mine Property, Upper Ralston Creek, Jefferson County, Colorado. Letter Report to Mr. Scott <br />Schreiber, Wright Water Engineers, from Roger L. Barker and Wade Gilbert, Kumar and <br />Associates, August 18, 2011. 6 pp. plus figure. <br />February 27, 2012 22 <br />