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C 2~'.S(ZTLNG ('1177, r i1:4 TER RE.S'O% ROES ENG7.~"EERI;vGl.l.(' <br />Ramsay M McDcrmid, P.E., Principal <br />9420 West Tennessee Avenue <br />Lakewood, Colorado USA 80226-4101 <br />Phone (303) 728-15811 Fax (303) 728-1577 Mobile (303) 903fi698 <br />roalcrmidnc°mrist. net <br />MEMORANDUM <br />To: Alex Schatz -Banks andGesso <br />From: Mike McDermid <br />Date: March 15. 2005 cc: <br />Subject: Response to DMG Hvdrolo¢v and Sediment Related and Slope Configuration, Access <br />and Haul Road Adequacy Comments in the MMRR Ouarry ~ular 112 Application <br />The objective ofthis Memorandum is to address the adequacy comments relating to hydrology <br />and sediment and slope configuration, access and haul road in the MMRR Quarry Regular 112 <br />Application. <br />General <br />The terrain in which the quarry is planned to be constructed is very steep, with overall slopes in <br />the range of 40% to 60%. There is no flat area available on which to start construction. The <br />initial mine requires two elements: a relatively flat processing azea in which to operate the <br />crushing and loading equipment and a road to access the processing area and transport material in <br />and out. An additional objective was to minimize visibility form the highway by keeping the <br />mine facilities behind the ridge adjacent to SH 119 as much as feasible. <br />The processing azea is required to be a minimum of four to six acres and the access road to have <br />the lowest feasible gradient. Because of the steep terrain, both of these are required to be in cut. <br />Tn order to reduce the lazge volume of excavated material that would have to be hauled off site to <br />construct these facilities, an on-site waste rock azea was selected. This area can be used for both <br />the interim storage of useable excavated material and the disposal of fines and other unusable <br />material. <br />The Construction and Mining Plan depicted in Exhibits C-2A through C-2D was designed to <br />optimize the somewhat conflicting priorities of minimum visibility, low-gradient access and haul <br />roads and the minimal excavation required to establish an adequate processing area. <br />Criteria <br />1. Temporary facilities are those that aze required to provide drainage and sediment control <br />during construction and operation of the mine. Permanent facilities are those that are <br />plammed to remain following site reclamation. <br />2. Haul roads: Haul tracks can climb grades of 10% to 20%, however grades are generally <br />kept to as low a grade as feasible given the site conditions. <br />