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seasonal variations, that is, lowest water levels in the fall and • <br />winter, and highest in the late spring/early summer after the spring <br />runoff recharge event . This year, all wells displayed water levels that <br />fell within their hi storic ranges, except for Well SLO42, which has <br />displayed in the past two years the highest water levels ever. <br />- Wadge Coal. Five wells monitor this seam. Wells 16 and 17 are in <br />hydraulic communication with the Wadge Impoundment (NPDES 002 Pond) as <br />indicated by their water level changes in response to changes in the <br />pond's water level. Well 19 is a flowing well fitted with a pressure <br />gage that normally exhibits its highest pressure values in the fall. <br />Well SW41 exhibits the same typical seasonal variation as noted for the <br />alluvium. Well 42 exhibits very little seasonal variation and a <br />decreasing water level trend since 1997. This year, all of these wells <br />displayed water levels within their historic ranges. <br />- Wolf Creek Overburden/Wadge Underburden. Four wells monitor the Wadge <br />Underburden in the Wadge Coal mining area. Well 6 exhibits the same • <br />typical seasonal variation as noted for the alluvium and exhibits a <br />generally increasing water level trend. Well 8P1 continues with a long- <br />term decreasing water level trend. A casing obstruction in Well 8 <br />(adjacent observation well to Well SP1), which first occurred in <br />September 1996, prevents measurements of water levels. Well 11 (another <br />flowing well fitted with a pressure gage) continues with a long-term <br />increasing water level trend. One well monitors the Wolf Creek <br />Overburden in the Wolf Creek Coal mining area. Well 7 exhibits typical <br />seasonal variability with water levels measured within its historic <br />range. <br />- Wolf Creek Coal. The one well that monitors the Wolf Creek Coal seam, <br />Well 10, exhibits this year water levels within its historic range, and <br />with same typical seasonal variability as previously defined. <br />- Spoils. Three wells; 22, 23, and 24; are completed in the upper <br />region of spoils above the Wadge Impoundment, which is generally . <br />unsaturated. The 3.8 feet of saturation previously observed in Well 22 <br />4 <br />