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West E[k Mine <br />• realistic sustained inflow rate of 7 gpm to both the F and B Seams Review of data presented in <br />Figure 23 shows the average groundwater inflow during the period 1983 to 1995 is about 8 <br />AF/yr or approximately 5 gpm continuously. Using the average 7 gpm groundwater inflow <br />assumptions, WWE calculated a "fill time" for the mine (including the Apache Rocks mining <br />area) of 2,110 years, again assuming no seepage or outflow. <br />This "time to fill" calculation was based on the following information and assumptions: <br />• B Seam mining thickness (12 ft.); <br />• E Seam mining thickness (11 ft.); <br />• Approximate Current (1996) Minim Area (B Seam) -Longwall Panels (23,020,000 ft 2) and <br />Development Areas (16,370,000 ft. ); <br />• Approximate Apache Rocks Mining Area (B Seam) -Longwall Panels (57,403,750 ft.2) and <br />Development Areas (19,854,250 ftZ); <br />C~ <br />• <br />2.05-218 Revised November 2004 PR10 <br />