Laserfiche WebLink
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 some <br />parts of the distribution line from being located below ground. All pipelines above ground are supported <br />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 to <br />the plant access road. See Maps 53 and 54. Since the tank site is on a ridge line only small amounts (0 <br />to 4") of topsoil were found. The topsoil was stripped and stored in the access road topsoil storage piles. <br />The average depth of topsoil along the access road route was approximately four inches. See Maps 9 <br />and 10. Topsoil stripped from the road area and tank site area are stored in locations shown on Maps <br />53 and 54 and will be used for final reclamation. Cut and fill slopes were mulched and seeded after <br />construction was completed. <br />When mine operations cease the storage tanks, treatment building and their foundations will be <br />removed. The gravel surfacing and foundation material will be removed and the ground will be returned <br />to approximate original contours, covered with approximately four inches of topsoil and re-seeded. <br />Buried pipelines not requiring removal for reclamation of the "D" Portal Area will be left in place to <br />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 tank. <br />Approximately 250,000 gallons of the 1.6 million gallons stored is held for fire demand only. The <br />process settling pond is a secondary water source for fire fighting. Pipes are sized to deliver 500 gpm to <br />the site, which means that enough fire water will be available to fight a fire for at least 8 hours. This is <br />equivalent to supplying approximately 10 hoses capable of 50 gpm as required by MSHA. <br />IV.F.4 Process Water The primary supply of the preparation plant process water is from the raw water <br />tank. Makeup water in the preparation plant is delivered at an approximate rate of 33,240 gallons per <br />day or 35 gpm based upon a 16-hour per day operation. Unknown quantities of water which is lost <br />through the clean coal and refuse or gained from the raw coal account for the varying amount for the <br />makeup water. Additional gains in water also come from groundwater pumped from the mine, along <br />with treated domestic sewage water. These additional waters are pumped directly to the process <br />settling pond for clarification prior to recycling into the plant process cycle. <br />In the event of a malfunction of the process filtration system, the dirty coal wash water can be pumped <br />into the process settling pond for clarification before returning to the wash cycle. The emergency <br />overflow pond is located so that water will flow into it without mechanical assistance in case the pumps <br />get clogged or there is a power failure. Effluent from the emergency overflow pond will be pumped into <br />the process settling pond. The process settling pond and the emergency overflow pond have earth <br />embankments and impervious liners. <br />• Mine Permit Renewal #3 (Rev. 8/99) IV-28 <br />