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producing at a rate of approximately 700,000 tons per year (Colorado <br /> Division of Mines , 1979). A breakdown of the haulage per unit of time <br /> 'is as. follows: <br /> 700,000 tons/year = 2,800 ton/day <br /> 50 days year <br /> 2,800 tons/da = 350 tons/hour <br /> 8 hours day shift) <br /> 350 tons/hour = 14 truck loads/hour <br /> 25 tons/truck load <br /> 14 truck loads/hour = 0.23 truck loads/minute <br /> 60 minutes hour <br /> f, <br /> Approximately one truck load every four minutes presently goes from <br /> 'the mine to the silos at the loadout facilities. Including the returning <br /> empty trucks, there is presently-one truck passing any given point on <br /> 'the haulage route every two minutes during hauling hours. <br /> Additionally, under this alternative, it is possible that CWI -could <br /> determine for economic reasons to shut down the Orchard Valley Mine. <br /> ]OWI has publicly stated that the operation cannot continue to function <br /> feronomically at a production rate of 700,000 tons per year. Ripple <br /> affects of a CWI shutdown could cause some unemployment, a loss of local <br /> arvd county tax revenues , and other effects of a depressed local economy. <br /> Nowever, a shutdown would not likely be of regional significance because <br /> cof-expected regional increases in coal mining. These increases would <br /> adsorb any such effects of a CWI shutdown. CWI' s customers (a mid- <br /> iwEstern utility and a rubber company) would, however, have to secure new <br /> a;ontracts and coal from other companies. <br /> rAl-ternative Two -- Removal of Limitation on Rate of Production <br /> :Impacts <br /> Air Quality, The Draft West-Central Colorado Coal ES (DWCCCES) <br /> :predicted a production level of 1.25 million tons per year from the CWI <br /> ]Orchard Valley Mine. This level was predicted to be achieved by 1980. <br /> The -anticipated air quality impacts are, therefore , predicted to equal <br /> csl-ightly more than the resulting amount detailed in the draft ES. The <br /> zomplete discussion of air quality impacts from CWI' s Orchard Valley <br /> !Mine is found on pages 203 through 227 of the draft ES. <br /> In summary, the air quality impacts would be due, mainly, to parti- <br /> cculate emissions. The emissions level predicted for the production rate <br /> xf '.1.25 million tons per year was 19.6 tons per year (Table R4-B, p. <br /> ,2.08, Ch. 4). Therefore, at the 1.3 million ton rate of production, the <br /> 13 <br />