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gsga that eshibita its highest pressure values im the fall. Well SW41 eshlbits the same <br />typical easeonal variation as noted for the alluvium. Well SW62 azhibits an incrensinq • <br />rater level tranQ at its adj scent barJcfilled mina pit continuos to resaturate. <br />Wolf Creak Overburden/Wedge Underburdem. Five calla monitor the Wedge Underburden in the <br />Wedge Coal mining area. Wells 2 and 6 erhihit typical seasonal variation (as defined in <br />the preceding Alluvium discussion). Moaltoring at Wall 2 (updip of fly ash pit) raa <br />discontinued after the May reading (see "Introduction^i. Kell 6 azhibited this year its <br />highest rater levels on record. Well BP1 continues rith a long-term dacraneinq rater <br />level trend. A toeing obstruction in Wall B (adjacent observation call to Well BP1) , <br />rhich first occurred in September 1996, prevents measurements of rater levels. Well 11 <br />continuos with along-term incressing rater level trend. Ona roll monitors the Wolf Creek <br />Overburden in the Wol! Creak Coal mining area. Wall 7 ezhibite typical seasonal <br />variability. <br />Wolf Creek Coal. Ono of the two cells (Wall 10) that monitor the Wolf Creek Coal seam <br />azhibited the same typical eeaeoml variability se previously defined. Well 15 has <br />erhibited in the past tro years the loraet rater levels on record, This Ss due to <br />deraterinq Zrom the adjacent mining pit. • <br />Spoils. Three calla; 22, 23, and 26; are completed in the upper region of spoils above <br />the Wedge Impoundment, rhich is genarslly uneaturatad. Tha 3.B feet of aatvration <br />observed in Well 22 is moat likely incorrect since adjacent Wells 23 and 24 are normally <br />dry. The suspect rater levels in Wall 22 may ba a xaeult o! rater trappe6 in the borehole <br />(perhaps by a boulder in the spoils that the borehole dose not completely penetrate). <br />Well 23 sometimes shore rater in late February, March, and April as snot malts quickly off <br />this raeterly-facing elope. Wall 24 has boon dry for the entire period of record. <br />Thre9 calls; 25, 26, and 27; era situated in the lover region of spoils above the Wadqe <br />~ Impoundment. All three of these rolls rare outfitted rith continuous recordara operated <br />by the U.9. Geological Survey (USGS) until the end of 1983. Well 25, the highest <br />upgradient of thane three calls on the spoils elope, indicated m absence of recharge in <br />1987, 1988, 1990, and 1991, but arhibited recharge in all other years since 1983. Wall <br />27, loraet of the three, shore that its rstex levels era met likely dependant upon the <br />' rater level in the Wndge Icgao~~~~--mot loeaGd 50 feet gray. The USG9 pareonnal oparnting <br />the zeeordese prior to 1984 also support theso lindings. Wall 26, locetad betrean Wall• <br />4 <br />