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D.3 Waste Rock Disposal <br />D.3.1 General <br />There are six waste rock disposal areas proposed as part <br />of the San Luis Project. As discussed in the introduction, <br />three of the six waste rock disposal areas remain unchanged <br />from the original permit. Area A has been eliminated <br />necessitating some redesignation of the disposal areas. The <br />East Pit Waste Rock Disposal Area remains unchanged. Waste Rock <br />Disposal Areas C and D have been renamed as Areas B and C but <br />the design remains the same. Area B has been redesignated Area <br />A and has been downsized. The South Waste Rock 'Disposal Area <br />has been relocated and redesigned to eliminate tailings <br />disposal. A new disposal area, Area D, has been designed south <br />of the Rito Seco between the south haul road and the eastern <br />permit boundary. The following sections will provide design <br />details of the downsized Area A, the redesigned South Waste <br />Rock Disposal Area, and the new Area D. <br />All amended waste rock disposal facilities have been <br />designed in accordance with previously approved design <br />characteristics. The areas have been designed with slope angles <br />of 33.5 degrees from the horizontal plane or 1.5 horizontal:l <br />vertical (1.5H:1V). In practice, the waste rock will be end <br />dumped in 50-ft maximum lifts and will assume a slope equal <br />to the angle of repose for the waste rock material. Upon final <br />reclamation, the outslopes will be adjusted by grading to a <br />3H:1V overall slope broken by 15-ft dozer width benches every <br />50 feet in vertical height. The waste rock disposal areas are <br />shown in plan view on Figure C-1. <br />D-2 <br />