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e <br />ESPEY, HUS7pN S ASSOCIATES, INC. <br />• _ <br />3.6.2 Underground Operations <br />The list of major equipment can be found in Section 2.0 for the <br />two. mines, <br />3.7 MINE WATER DISCHARGE <br />Water that inflows to the Meeker Area Mines will have to be pumped out <br />of the mines. This water will pick up some sediment in the form of coal dust, rock <br />dust and some mine rock fines. Ia order to remove this sediment, all mine water <br />will be pumped into settling ponds. <br />During the early phases of mining, the sediment control ponds near the <br />mine portals will have enough excess capacity to hold this mine water for a <br />minimum of 24 hours to allow the sediment to settle out. As the mines enlarge in <br />azeal extent, water inflows may increase. <br />1a this case, either the present ponds will be enlazged or additional ponds <br />will be built. If water flows become quite large, it may be necessary to install bore <br />holes at the lowest portions of the mines and pump the water to the surface through <br />them. Ponds will be constructed at those points to provide a minimum of 24 hour <br />detention to remove any sediment. <br />Water quality of mine inflow water is addressed in the Hydrology Section <br />(Chapter G). All discharges will be subject to NPDES Permit requirements. <br />3.8 BLASTING <br />Blasting may be necessary during the construction phases of the opera- <br />tion of the Meeker Area Mines. If there is any blasting to be done within 1J2 mile of <br />any building or structure not owned by Northern Coal, the owner mill be notified <br />• and, if so requested, a survey will be done of such structures prior to any blasting. <br />C-49 <br />7/~/~7 <br />