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storage and hudling fsailities, a coal przPAMdon plant and associated refuse piles, and <br /> RlaiutCnanCe, warchom and office&dlidft <br /> 3inae 1991 when the mine was shut down, MCR, through various land exchanges, has <br /> transfwW ownership of portions of the Coal Basin property to the U.S. Forest Service and <br /> Bureau of Land Management. The remaining portion of the property, which is the focus of this <br /> Work Plan, includes approximately 405 ages. This area includes: (1) the main yard area <br /> including the maintenance shop, Preparation pit, warehousing and garage facilities and office <br /> building, (2) the Sutey and other refuse Pilo, and (3) the valley floor along Dutch Creek <br /> between the portals of the twin haulage tunnels and the main yard (Figure 1). <br /> 1.2 Purpose and Scope <br /> ne purposes of the proposed Environmental Assessment are two-fold: (1) to document <br /> costing environmental site conditions within the 405-acre area as detailed above, and (2) to <br /> identify and evaluate possible environmental liabilities associated with the property, whether they <br /> are real or perceived. In this regard, the Work plan focuses on the identification and evaluation <br /> of potential environmental liabilities through a detailed site inspection, and limited sampling and <br /> analysis. Conditional on the results of the initial evaluations, additional investigations may be <br /> proposed if environmental liabilities are identified through the environmental assessment process. <br /> 1.3 Documented and Perceived Environmental Concerns <br /> Many historic mining operations in the western United States have resulted in <br /> environmental impacts, that in some cases, are quiWextensive and costly to resolve. Hard-rock <br /> mining operations (gold, silver, and lead in particular), frequently result in contamination of <br /> soils and ground water with heavy metals, and uncontrolled releases of acidic surface-water <br /> discharges. <br /> - 2 - <br /> r`r• J HK]II/f1111 C](JTOCOCC�C �T �� O��'T-OT-/-s(T <br />