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<br />The raw water tank has a capacity of 1.6 million gallons. It is an enclosed steel tank approximately <br />80 feet in diameter and 42 feet high. The tank is supported on a ring wall and compacted gravel <br />pad foundation. <br />The potable water tank has a capacity of 40,000 gallons. This tank is supported on a ring wall and <br />compacted gravel pad foundation. <br />The potable water treatment building is apre-engineered metal building approximately 40 feet wide <br />by 40 feet long by 12 feet high and contains chlorination, filtration and other water treatment equip- <br />ment. This building has spread footing foundations and a concrete floor slab. <br />Potable and raw water is carried to required "D" Portal Area locations in buried pipelines constructed <br />similar to the supply pipeline. Rock ledges directly below the water storage tank area prevented <br />some parts of the distribution line from being located below ground. All pipelines above ground are <br />supported on low "sleeper' type foundations and are traced and insulated for freeze protection. <br />The storage tank site was constructed as shown on Map 52. It is accessed from a road connecting <br />to the plant access road. See Maps 53 and 54. Since the tank site is on a ridgeline only small <br />amounts (0 to 4") of topsoil were found. The topsoil was stripped and stored in the access road <br />• topsoil storage piles. The average depth of topsoil along the access road route was approximately <br />four inches. See Maps 9 and 10. Topsoil stripped from the road area and tank site area are stored <br />in locations shown on Maps 53 and 54 and will be used for final reclamation. Cut and fll slopes <br />were mulched and seeded after construction was completed. <br />When mine operations cease using the storage tanks, treatment building and their foundations will <br />be removed or buried on site. The gravel surfacing and foundation material will be removed and the <br />ground will be returned to approximate original contours, covered with approximately four inches of <br />topsoil and re-seeded. Buried pipelines not requidng removal for reclamation of the "D" Portal Area <br />will be left in place to minimize disturbance. The site will be restored as shown on Map 55. <br />IV.F.3 Demand Fire Water Initial demand for fire water will be met from the raw water storage <br />tank. Approximately 250,000 gallons of the 1.6 million gallons stored is held for fire demand only. <br />The process settling pond is a secondary water source for fire fighting. Pipes are sized to deliver <br />500 gpm to the site, which means that enough firewater will be available to fight a fire for at least 8 <br />hours. This is equivalent to supplying approximately 10 hoses capable of 50 gpm as required by <br />MSHA. <br />• Permit Rev. 4 (11/2002) IV-28 <br />