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• II\'IIIIIl0~9C OJ(J IIIlCr1Ai(JbUll WI,I IIIII)tlil ; ISftY]IpC11! ~O/ IItC PCr/rll( JIIl1:I,11Jtrlu :Item' "B" Seam The primary mining activity in 199? occurred in the "B" seam. The B West Mains were developed an additional 21 crosscuts to the west. The lust northwest panel headgate and tailgate developed 26 crosscuts to the north with a bleeder connecting the two which consists of three additional cross- cuts. Five crosscuts of the second northwest headgate were also developed. The first northwest Iongwall panel was retreat mined six crosscuts southward. • Refuse area wells SG-I and GP-I continued [o show lower levels than in years previous to 1937. This is due to persistent louver precipi- tation patterns. pfG01 ~i :~ ~ i d • Refuse area wells GP-3 through GP-~, as in previous years, contained no water. • Barren Member well 33-H-1, as previously described, was affected by subsidence. This well has since recovered to pre-mining warer levels. Mining Activities Planned for 1993 F Seam MCC plans no further mining activities in the F seam. B Seam During 1993, lonsnvall panel and mains develop- ment and IonSwall retreat mining will continue. Development of the 2nd Northwest panel will be • completed. Longwall mining of this panel is planned to be completed as well. Development of the 3rd Northwest panel and mos[ of the 4th Northwest panel will also be completed. The B West Mains development will continue westward to the location of the 5th Northwest panel. Water Quality Samples taken during 1992 indicate water quality in the mine to be good. Accordingly, 1993 should pose no problem for discharge. The discharges should readily meet NPDES effluent limitations after settling and should not measurably impact receiving waters. Quality of water discharged in 1993 should be similar to the 1992 values shown in Table S. Groundwater Some groundwater wells exhibited slightly changed conditions in some instances and the subsidence monitoring deep wells showed some influence from mining. Overall however, the wells remained fairly constant compared w previous years. Most notably. the 1992 data indicate: • Barren Member well 33-H-2 has been lost due to blockage problems which occurred after it was installed. The casing wa± appar- ently damaged by subsidence as described earlier in thin section. • Barren blemher well 33-H-3 has heen lost. Moisture problems with the casing and later communication with the mine workings proh- ably caused by subsidence precluded the determination of water levels. • Barren Member well B-32 exhibited virtually no response to seasonal influences which indicates no apparent connection w surfacr recharges. • "F"-seam wells SOM-2, and SOM-16 show no seasonal or annual fluctuation and have little or no surface water connection. • Barren Member wells SOM-13 and SOM-30 have shown seasonal variations in previous years. During 1937, SOM-80 showed very little or no response to seasonal Ouctuation while SOM-l3 was- similar to previous years. Since 1938, neither well has shown a response to seasonal fluctuation. The shallow subsidence monitoring wells, SW-I throughSW~i.weregeneralh-thesamc as in previous years. Lower Refuse Pile During 1992, mine development waste from the underground mining operations was placed in the lower refuse pile. The lower refuse pile was per- mitted for permanent disposal of some 1.7 million