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- 2 - <br />1.2 PURPOSE OF THE STUDY <br />The purpose of the study was to conduct necessary geo- <br />technical and hydrological evaluations required for the de- <br />sign of the initial waste rock pile; the results of our work <br />would assist ARCO Coal Company in obtaining necessary permits <br />for the construction of the initial waste rock pile. This <br />basically involves satisfying the regulatory requirements of <br />the CMLRB for coal mining in the relevant areas of geotechni- <br />cal engineering, surface water hydrology, and ground water <br />hydrology. <br />As definitive data on the physical properties of the <br />waste material become available only after the mining commence- <br />ment and as data on the foundation material properties are <br />limited, the design recommendations of this report are of a <br />preliminary character. They will have to be verified when <br />testing of actual waste material can be performed and when <br />data on physical properties of the foundation material are <br />obtained; this will be accomplished during the Phase 2 of our <br />studies when the ground water monitoring system will be in- <br />stalled and the foundation material investigated. <br />1.3 METHOD OF THE STAY <br />Data on the site geology, hydrology and the physical <br />properties of the foundation material developed during pre- <br />vious studies at the Mt. Gunnison mine were collected and re- <br />viewed; an appropriate set of these data has been used for our <br />analyses and design recommendations. When site-specific data <br />were not available, data from the literature and our own ex- <br />perience were used for the same purpose. <br />cEO++voao conw~nNC, iNC. <br />