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• Because of the complexity of the old mine workings in the area, and the potential connection to the stream <br />system, it is anticipated that historic and current mining and pumping operations in the area have already <br />affected the ground water discharge to the stream system. Figure 9 illustrates the relationship of the wells and <br />coal seams to the ground surface and the surface water system. <br />Operations <br />It is our understanding that the mine will not use a preparation plant. The total amount of water leaving the <br />mine on raw coal annually is projected to be approximately 46.9 acre-feet, based on a fifteen percent moisture <br />content by wet weight, and production of 425,000 tons per year. The total amount of water includes only the <br />raw coal. Other water uses will include pond evaporation, which is projected to be approximately 3.1 of/yr. <br />Moisture content of the raw coal leaving the mine was obtained from previous reports. Appendix C discusses <br />the methodology used for the numbers calculated above. <br />The water on raw coal equals 15 percent of raw coal by wet weight. This water consists of specific retention, <br />or water which will not drain by the force of gravity alone (see Appendix D for a detailed explanation of <br />specific retention), and water remaining on the raw coal from inside-mine dust suppression requirements. The <br />removal of the portion of water retained on the raw coal which is specific retention does not impact <br />downstream water rights, but that portion of incoming water which is remaining from underground dust <br />suppression requirements is consumptive use and is described in the section below on dust suppression inside <br />the mine. <br />The consumptive use of water associated with the mining may increase proportionally as coal production <br />increases to a projected total of 30.1 acre-feet per year, based upon a projected maximum of 425,000 tons/yr of <br />raw coal, as shown in Table 3. <br />Domestic Uses <br />Domestic facilities at the mine may include offices, changing room with showers, cafeteria, and lavatories. <br />Water may be transported to these facilities by tank trucks. Based on other similar facilities we project an <br />annual requirement of 2.0 acre-feet. The domestic water system will use a leachfield to return effluent to the <br />• -15- <br />