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EFCI Southfield Mine -Year 2006 Annual Hydro[o~ Report Apri125, 2007 <br />1.0 INTRODUCTION <br />This 2006 Annual Hydrology Report (AHR) summarizes ground water inflows, use, and discharge, <br />and ground and surface water hydrologic monitoring results for the Southfield Mine and Loadout <br />areas during the 2006 water year, which corresponds to the calendaz year. <br />Energy Fuels Coal, Inc ("EFCI") is the owner and operator of the Southfield Mine located <br />approximately 8 miles south of Florence, Colorado, and the associated Loadout facility located <br />approximately 1.5 miles northwest of Florence, as shown on Figures 1 and 2. EFCI ceased active <br />mining and processing activities in late December 2000. The remaining stockpiled coal was sold <br />and shipped during January and February 2001 and fmal reclamation actvities for the Mine Area <br />were initiated in August 2001. Underground mine azeas were accessible for ongoing mine inflow <br />monitoring through September 2001. Monitoring of underground sites was discontinued with <br />permanent sealing of the mine portals in December 2001. EFCI discontinued use of the sepazate <br />Loadout Area in 1996 until it was reclaimed in 1997. <br />Water monitoring activities during the 2006 water yeaz were generally based on the approved <br />monitoring plan, presented in Exhibit 25, Hydrologic Monitoring Plan, of the Colorado Division of <br />Mining and Geology (CDMG) Mining and Reclamation Plan document. Hydrologic monitoring <br />activities were conducted or supervised by George Patterson. Hydrologic monitoring samples were <br />analyzed by ACZ Laboratories, Inc. of Steamboat Springs, Colorado. Field and laboratory data for <br />the 2006 water yeaz aze provided in Appendices A and B respectively. Surface water monitoring <br />sites, ground water monitoring wells, and mine inflow monitoring sites aze shown on Figures 1 and <br />2, Mine and Loadout Monitoring Locations, respectively) <br />In order to provide a reference for identification and evaluation of any changes in ground water <br />levels or inflows, surface water flows, or surface and ground water quality, data collected by the <br />previous operator, Dorchester Coal Company (1979-1985) and more recent EFCI monitoring data <br />(1986-2006) is included in the data summaries. Required monitoring data collected and <br />summarized in this report includes the following: <br />• Quantity and quality of mine inflows <br />• Water use quantities <br />• Quantity and quality of mine water and surface runoff dischazges to area streams <br />• Ground water quality and levels <br />• Stream flow quantity and quality <br />6417!2006 annual hyd rpt.doc NWCC INC. Page 1 <br />