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(~ WactPWatPr Treatment Plant -The West Elk Mine has apackage-type wastewater treatment plant to treat sewage from the mine's facilities. The plant has a capacity of 10,000 gallons per day. With an aeration basin and clarifier, the plant provides primary and secondary treatment. The wastewater treatment plant is operated under applicable state laws that govern wastewater treatment facilities, administered by the Colorado Department of Public Health and the Environment. In 1996, Mountain Coal Company expanded the plant to increase the throughput to 20,000 gpd. The expansion included a 3,000 gallon flow equalization tank, an additional clarifier and a flocculent system. The clarifier is added to provide additional retention and clarification as a passive safeguard to plant operation. The flocculent system will be used as a secondary safeguard that may be operated to enhance solids settling in the primary clarifier. One of the major components of the mine ventilation program is'the Sylvester Gulch Fan. This facility is located in Sylvester Gulch approximately one-half mile south of the mine facilities azea. Information concerning the design and operation of the fan is contained in Exhibit 42. The Lone Pine Gulch Portals were situated approximately one (1) mile west of Somerset, Colorado, at an elevation of approximately 6,480 feet. The Lone Pine Fan Facility was constructed in 1995, accessing the B-Seam, to serve the West Elk Mine as the primary ventilation facility for the then ~~ completed Northwest Longwall Panels (Nos. 1-7); the Jumbo Mountain Longwall Panels (Nos. 8 and 9), and the Southern Longwall Panels (Nos. I2, 13, 13A). These 12 longwall panels were isolated underground from the active workings, using explosion resistant seals, and the entire area is now abandoned. Watertight bulkheads were installed in each of the portals in 2001. The designs, portal profiles, and plan view of the bulkheads are shown on Drawing Nos. 42A-1, 42A-2, 42A-3 included in Exhibit 42A, in Volume 7 of the Pemut Document. The area was reclaimed in 2002 and 2003. In order to ensure adequate mine ventilation for West Elk Mine's current and future mining areas, new ventilation shafts (intake and exhaust shafts) aze required. Coristruction of the site for the lazge intake shaft and the large return shaft began during the Spring of 1997 and shag sinking began in the fall of 1997. The ventilation facility is located approximately one half mile from the existing Sylvester Gulch Fan (Map 53B). Information regarding the design, construction and operation of the ventilation facility aze contained in Exhibit 69. A third ventilation shaft (Vent Shaft #3) was constructed during the summer of 1997. Vent Shaft #3 is a 10-foot finished diameter shaft located approximately 400 feet east of the electric borehole site (Map 53B). Information regazding the design, construction, and operation of the ventilation facility aze contained in Exhibit 69. I~ 1.05-71 Nmember 7004 PR11