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since May 2002. Previous samples displayed an increasing TDS trend. Due to safety concerns because of its proximity to the highwall, WW4 was abandoned in August 2003. A replacement Wadge coal well will be drilled in 2004. The Seneca II-W PHC predicts an annual average TDS value of 2630 mg/1 for Well WW14, while a value of 4220 mg/1 (4005 mg/1 calculated) was observed this year. For Well WW17, a value of 3002 mg/1 was predicted, while a value of 670 mg/1 was observed this year. As noted in the previous paragraph, Well WW14 experienced this year a TDS exceedence of the PHC prediction. This prediction was based on several assumptions. 1) Baseline water quality values were an average of all Wadge coal wells at Seneca II-W. 2) Aquifer characteristics were an average of all Wadge coal wells at Seneca II-W. 3) The Wadge coal seam was saturated for its entire thickness (11.8 feet). These assumptions, however, do not hold true for Well WW14. Prior to mining in the north area (November 1992), this well was almost always dry (see the 1993 AHR for a complete listing of earlier water level data). Since this particular portion of the Wadge seam was dry prior to mining, spoils water will now contribute 1008 of the water present. - Sage Creek Overburden. This unit exits between the Wadge and Wolf Creek coal seam. Mining of the Sage Creek coal seam began in September 2003. Well WS0V24 was drilled in August 2001 in the II-W South area. Only five samples were collected. This well failed due to a landslide that occurred in April 2003. A replacement well will be drilled in 2004. - Sage Creek Coal. Mining of the Sage Creek coal seam began in September 2003. Well WSC24 was drilled in August 2001 in the II-W South area. Only five samples were collected. This well failed due to a landslide that occurred in April 2003. A replacement well will be drilled in 2004. 9