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., <br />_..~ <br />1.0 INTRODUCTION <br />Wyoming Fuel Company (WFC) owns and operates the New Elk and Golden Eagle <br />underground coal mines in southern Colorado. During 1985, activities at the mines were <br />limited because of discontinuation of mining April. However, planning, monitoring and <br />developmental activities were conducted throughout the year. This report presents the <br />results of the required studies associated with hydrology, particularly Stipulations 15 of <br />the New Elk (NE) and 13 of the Golden Eagle (G E) permits which require the annual <br />assessment of impacts to the hydrologic balance associated with underground mining and <br />related surface activities. Also included in this report is a discussion of mitigative <br />measures taken to minimize disturbance to area hydrologic functions and plans for future <br />hydrology monitoring activities. <br />Information which has been collected and utilized in this assessment includes: <br />0 Previously collected data and assessments provided in the mine permit applications <br />submitted by CFdc[ in 1931; <br />~~ 0 Consumptive use of water for mining operations; <br />0 Mine water inflow and discharge studies; <br />0 Spring and Seep Survey; <br />0 Area \Vater Users Survey; <br />0 Assessment of coal refuse disposal; <br />0 Assessment of secondary or retreat mining; and <br />0 Surface and groundwater baseline sampling. <br />Appropriate data and information related to this assessment is presented in the <br />Appendices of this report. As the mine permit areas are adjacent, many of the studies <br />have been conducted for the entire area of both mines as opposed to assessing each <br />facility separately. Utilizing all of this information, an assessment of the potential <br />impacts of mining for the 1985 water year are presented in this report. <br />G~J <br />