Laserfiche WebLink
Mine Inflow Study, Page 3 <br />At a peak elevation of 6100 the H-10 Area will overflow into <br />the B-6 Area. This flow will add to the flow going to the Area <br />East of B-6. <br />4 D1~ Area <br />This area is isolated from the monitoring wells by unmined <br />coal pillars. A mine inflow study performed in 1983 showed that <br />70 gpm was flowing into the lower portion of the area through a <br />crack in the roof. Prior studies evaluated this flow as high as <br />140 gpm. In any case this flow now has over 200 feet oP head <br />against it. The flow from this area, if any, contributes to the <br />flow calculation for the H-10 Area beginning in October 1988. <br />The calculated flow into the H-10 Area did increase from 37 gpm <br />to 57 gpm after the 4 Dip Area began contributing flow to it. <br />Area East of B-6 <br />This area is isolated from the monitoring wells by unmined <br />coal pillars. The area has been utilized as the mine sump for <br />years. This area is believed to be connected to the Gunniion <br />River alluvium through old workings to the east. The maximum <br />projected water level in this area is 6010. The elevation of the <br />connection between this area and the B-6 Area is 6060. <br />If the Area East of B-6 is not connected to the Gunnison <br />River alluvium, the water in the area will reach elevation 6060 <br />and flow into the B-6 Area. If this happens then the water level <br />in monitoring well B-6 will rise above its projected maximum of <br />6060 and indicate that preparations need to be made to handle <br />water from the old B-Seam track portal which is at elevation <br />6090. <br />Conclusion <br />It has been calculated that a total of, (185+50), 235 gpm is <br />Plowing into the B-6 and H-10 Areas. The water level in B-6 is <br />expected to reach its peak elevation of 6060 during the second <br />quarter of 1991. IP the water level in B-6 rises above 6060 then <br />plans should be made to handle water from the mine at the old B- <br />Seam track slope. <br />The water level in H-10 is expected to reach its peak <br />elevation of 6100 during the fourth quarter of 1991. Water <br />flowing into this area will then overflow into the B-6 Area and <br />contribute to the water flowing to the Area East of B-6. <br />• <br />