Laserfiche WebLink
Algermissen et al (1982) have determined a peak horizontal <br />bedrock acceleration of 0.13 g associated with an earthquake <br />' having a lesser magnitude than the MCE. Algermissen et al <br />(1982) estimated that the 0.13 g bedrock acceleration has a <br />' 90 percent probability of not being exceeded in 250 years, <br />which implies an anticipated recurrence interval of between <br />' 200 and 700 years. <br /> Due to the location of the Sangre de Cristo Fault in <br /> relation to the project site, a peak horizontal bedrock <br /> acceleration of 0.60 g has been selected for the San Luis <br />t Project as the design acceleratio n for facilities which will <br /> be subject to potential earthquake loadings over the long term. <br />' The equivalent pseudostatic coefficient for use in stability <br />analyses is the maximum value recommended by the U.S. Army <br />' Corps (1970) of 0.15 g. For short-term facilities, which will <br />be exposed to potential earthquake loads only aver the life <br />of the project, a peak horizontal bedrock acceleration of 0.13 <br />' g has been selected. Based on correlations presented by Jansen <br />(1985), this short-term peak bedrock acceleration corresponds <br />t to an equivalent pseudostatic coefficient for use in stability <br />analyses of approximately 0.08 g. <br />' D.2 Mine Plan <br />' D.2.1 General <br />The mine plan for the San Luis Project involves open- <br />pit mining in two adjacent areas referred to as the East Pit <br />t and West Pit. The pits are located on Figure C-2, General <br />Facilities Arrangement. Pit designs are shown on Figures C-2 <br />and C-4. The pits are expected to mine approximately 13 million <br />tons of ore and 22.5 million tons of waste rock wer a 7- to <br />10-yr period. The ore production is expected to an average of <br />5,000 tpd. <br />D-5 <br />