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EFCI Southfield Mine -Year 2007 Annual Hydrology Report April 21, 2008 <br />1.0 INTRODUCTION <br />This 2007 Annual Hydrology Report (AHR) summarizes water use, discharges to streams, and <br />ground and surface water hydrologic monitoring results for the Southfield Mine and Loadout areas <br />during the 2007 water yeaz, which corresponds to the calendar year. Similar to previous reports, <br />discussion of hydrologic data and comparison of these data with previous reporting periods aze <br />incorporated within the report. The AHR is prepared and submitted in accordance with Exhibit 25, <br />Hydrologic Monitoring Plan, of the permit application. <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, coal processing, and coal sales activities in late December 2000 through February 2001. <br />Final reclamation activities for the Mine Area were initiated in August 2001. Underground mine <br />areas were accessible for ongoing mine inflow monitoring through September 2001. Monitoring <br />of underground sites was discontinued with permanent sealing of the mine portals in December <br />2001. EFCI discontinued use of the sepazate Loadout Area in 1996 until it was reclaimed in 1997. <br />Water monitoring activities during the 2007 water year were generally based on the approved <br />monitoring plan, presented in Exhibit 25, Hydrologic Monitoring Plan, of the Colorado Division of <br />Reclamation, Mining and Safety (DBMS) permit application document. Hydrologic monitoring <br />activities were conducted or supervised by George Patterson, Mine Manager. Hydrologic <br />monitoring samples were analyzed by ACZ Laboratories, Inc. of Steamboat Springs, Colorado. <br />Surface water monitoring sites and ground water monitoring wells are shown on Figure 1, Mine <br />Monitoring Locations, and Figure 2, Loadout Monitoring Stations. <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 />(1985-2007) is included in the data summaries. Required monitoring data collected and <br />summarized in this report includes the following: <br />Water use quantities <br />Quantity and quality of mine water and surface runoff dischazges to azea streams <br />Ground water quality and levels <br />Stream flow quantity and quality <br />2007 AHR.doc WP Page 1 <br />