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- wedge Coal. Five xelle monitor this seam, walla 16 wad 17 are is hydraulic • <br />communication with the wedge Impoundment (NpD83 002 Pond) as indicated by their <br />water level chsagea in response to changes in the poad'e water level. well 19 <br />is a £lowiaq wel l'£itted with a Dreaeura gaga that normally exhibits its highest <br />yreeeure values in the fall. well Sw41 exhibits the same typical seasonal <br />variation as noted for the alluvium. Well 42 exhibits very little seaeoaal <br />variation and a decreaeiag water level tread eiace 1997. All of thane wells <br />this year diaDlayed water levels within their historic ranges. <br />- wolf Creek overburden/wedge Vnderburden. Four wells monitor the wedge <br />Vnderburden is the Wedge Coal mining area. well 6 exhibits the same typical <br />seasonal variation ae noted for the alluvium and, up until 1997, exhibited as <br />iacreasiag water level tread. water levala at this well have recently droyyed, <br />but continue to fall within its historic range. wall 8P1 continues with a long- <br />term decreaeiag water level trend. A eaeiag obstruction in well 8 (adjacent <br />obeervatioa well to well BP1), which first occurred is Saytember 1996, yreve¢ts <br />meaeuremeate of water levels. well 11 (another flowing well fitted with a <br />pressure gage) coatinuee with a long-term iacreasiag water level trend. one <br />well moaitore the wolf Creak Overburden in the wolf Creek Coel mining area. <br />well 7 exhibits typical seasonal variability with water levels measured within <br />its historic range. <br />- wolf Creek Coal. The one wall that moaitora the wolf Creek Coal seam, well <br />30, exhiblte water levels within its historic range, sad with eama typical <br />aeaeonal variability ae Dreviovely defined. <br />- Spoils. Three walla; 22, 23, and 26; are completed is the uypar region of <br />syoile above the wedge Smyoundmeat, which ie generally unsaturated. The 3.8 <br />feet of saturation Dreviou9ly observed is well 22 is moat likely incorrect eiace <br />adjacent wells 23 sad 26 era normally dry. Tha ausyect water levels is well 22 <br />may be a result of water trapped is the borehole (yerhaDs by a boulder in the <br />syoila that the borehole dose not comyletaly yeaetrate). However, this well <br />became dry is August 1998, wad coatinuee to be eo. well 23 aometimea shows <br />water in late February, March, sad Ayril as snow melts quickly off this <br />westerly-facing elope, although it has been dry eiace 1985. well 24 has been • <br />dry for the entire period of record. <br />4 <br />