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MINII~lG & ENVIRONMENTAL SERVICES LLC <br />1.0 Project Summary <br />In the fall of 2007, the Cotter Corporation ("Cotter") engaged Mining & <br />Environmental Services LLC ("MES") to design and construct two adit bulkheads <br />at the idle Schwartzwalder underground uranium mine, located in the Ralston <br />Creek drainage in northwestern Jefferson County, Colorado. <br />On the MES team was Project Manager /Mining Engineer, Mark Levin, who led <br />the design and planning effort, and the Superintendent /Mining Engineer Willis <br />"Will" Beach, P.E., who was responsible for all phases of construction. <br />Subconsultants to MES included Mining Engineers Dr. John F. Abel, P.E., in <br />charge of overall review and direction of structural design, and Stephen Phillips, <br />P.E., of Phillilps Mining, Geotechnical and Grouting, Inc.("PMGG"), who was <br />responsible for providing input on the grouting and concrete plans and <br />specifications. Additional engineering support was provided by subconsultant <br />Mining Engineer Matt Collins, EI, who developed the preliminary and as-built <br />design drawings. <br />MES utilized Advanced Terra Testing, Inc. to perform compressive strength <br />testing of the adit rock samples taken by MES at the design phase, and CTL <br />Thompson, Inc. as an independent Quality Assurance inspector to sample and <br />test the concrete used in the bulkheads during construction. <br />