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Introduction <br /> The Douglas Mountain Ranch Mine is located approximately 0.5 miles southeast of Empire, CO <br /> in Clear Creek County at an elevation of 8500 feet. The operation consists of a single sand and <br /> gravel excavation and processing operation directly west of the Westbound I-70 on ramp, south <br /> of the US-40-I-70 interchange for Empire, CO. The deposit to be mined is Quaternary alluvium <br /> sitting atop Precambrian Boulder Creek Granite and biotite gneiss. Access to the site will be via <br /> the Westbound I-70 on ramp. <br /> The total permit area is 68.2 acres. <br /> DMR <br /> September 2018 i-1 <br />