2010-12-17_REVISION - C1981019 (153)

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INTRODUCTION 1.1 Purpose and scope of report Water Management Consultants, Inc. (WMC) has prepared this report for Kennecott Energy Company's (KEC) Colowyo Coal Company in support of a pre - feasibility study for the proposed Collom Mine. KEC is considering the development of the Collom Mine located approximately four miles west of the current Colowyo mining operation. The current operation (the Colowyo Mine) is located in northwest Colorado midway between the cities of Craig and Meeker on Highway 13 at mile marker 64 (Figure 1.1). This report provides information characterizing the project -wide groundwater and surface water baseline conditions for the proposed Collom Mine. It also addresses key hydrologic issues associated with project development including mine dewatering, slope C depressurization, and mine water management. The data collection activities described in this report were conducted according to the work scope presented in the "Work Plan for the Baseline Characterization Program" (Appendix 1.A) prepared for the CDMG and a detailed Sampling and Analysis Plan (SAP) (Appendix 1.13). These documents were prepared at the beginning of the 2004 field investigation program and were modified and expanded as appropriate to incorporate changes to the program during 2004 and 2005. The CDMG Work Plan was designed to collect the baseline data necessary to characterize the pre- mining environment as directed by the Colorado Surface Coal Mining Reclamation Act, the Regulations of the Colorado Mined Land Reclamation Board for Coal Mining, and the Guidelines for the Collection of Baseline Water Quality and Overburden Geochemistry, as well as to meet needs for the pre - feasibility study. The Work Plan for baseline data collection was provided to the CDMG for their input and was modified based on comments received from the CDMG (Appendix 1.A). i i� 2572 -R2 Colowyo Coal Company Water Management Consultants