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West Elk Mine <br />weather station collects "real-time measurements" on a regular interval for wind speed, wind <br />direction, air temperature, relative humidity, precipitation, and barometric pressure. <br />Mine Roads <br />Haul/Access Roads <br />No roads on the West Elk Mine site are specifically designated or utilized only as haul roads. <br />A majority of the roads are considered haul and access roads. They are primarily used as <br />access roads, but coal or coal mine waste are sometimes hauled across the roads. This <br />classification includes the following roads: <br />Road Designation Road Location <br />Silo Haul/Access Road Between silos and MB-2R <br />Middle Mine Haul/Access Road Between breaker building and Main <br />haul/access road <br />Upper Haul/Access Road Between the intersection of the Middle Mine <br />haul/access road and the Main haul access <br />road and the Portal access road <br />Main Haul/Access Road Between Highway 133 and the intersection <br />of the Middle Mine haul/access road and the <br />Main haul/access road <br />Refuse Pile Expansion (RPE) Access from the Main haul/access road, across <br />Haul/Access Road Sylvester Gulch and to RPE area. <br />Sylvester Gulch Haul/Access Road Between main haul/access road and the <br />ventilation shafts site <br />As coal or coal mine waste may be hauled on the above roads, all of the roads have been <br />designed, constructed and certified as haul roads. These as-built certifications are provided in <br />Exhibit 8A. There are three roads that are considered access roads only. They are the Three- <br />Sided Building access road, the Portal access road, and the Materials Storage Bench access road. <br />These roads have been certified as access roads and the certifications are also provided in Exhibit <br />8A. <br />Vertical grades on the haul/access roads vary. The middle-mine haul/access road has an overall <br />grade of 5.68 percent. This road is paved. The new silo haul/access road has a maximum grade <br />of 10 percent and is gravel-surfaced. The Sylvester Gulch haul/access road has been designed to <br />have an average grade of 7.6 percent with a maximum grade of 10 percent. This road is surfaced <br />with 12 inches of compacted Class 6 road base. <br />2.05-25 Revised June 2005 PRIO; Rev. January 2006; Rev. March 2006; Rev. April 2006 PR70, May 2006 PR10; Rev. January 2009 MR-350 <br />