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i <br />Office of Surface Mining, 1989. Environmental Assessment, <br />Colowyo Mine. <br />This environmental assessment was prepared in <br />conjunction with a proposed technical revision of <br />Colorado Permit No. C-81-019 to extend mining <br />operations into 335 acres of Federal lease C-29224. <br />The permit revision would allow mining of an additional <br />3.7 million tons of coal from the Federal lease. Since <br />the lease area had been previously permitted as a <br />topsoil stockpile area, no additional surface impacts <br />were identified. <br />