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• westerly facing slope. well 22-5 showed a two-fooi increase in water level after a slug <br />test in October, 7987 and increased slightly only during spring runoff, water is likely <br />trapped in a sump created by having drilled into an impermeable zone in the spoils, <br />such as a boulder or fine, highly compacted spoils material. cell 24-5 has been dry for <br />the entire period of record. <br />Three cells, 25-5, 26-S, and 27-5 are situated in lower spoils adjacent to the wedge <br />Impoundment which receives spoils eater discharge. All three o4 these welts were <br />outfitted with continuous recorders operated by the U S Geological Survey (USGS)-until the <br />end of 7983. Well 25-5, the highest upg radiant of These three wells on the spoils slope, <br />indicated an absence of recharge in 7987, 7988, and 1990, but exhibited recharge in 1.989. <br />wells 27-5, lowest of the three, and 26-5, located between ZS-S and 27-5, shoo normal <br />seasonal changes. The eater levels in wells 27-5 and 26-5 are most likely dependent upon <br />the water level in the wedge Impoundment Located 50 to 100 feet away, respectively. These <br />findings are also supported by the USGS personnel operating the recorders prior to 1984. <br />The low eater Levels noted in August 1987 at well 27-5 are likely a result of the lowering <br />of the level of the wedge Impoundment from pumping for the truck cash facilities mentioned <br />• earlier in this text. <br />Seven new spoil wells were completed in the fall of 7987. Three (Dell 54-5, 60-5, and <br />bt-S) were completed upgradient of the Spoils Spring #3 area, while four (welts 62-5 to <br />65-S) were completed in the Spoils Spring #1 area <see Exhibit 7-2). The purpose of <br />placing several wells at each site was to accurately define The potenCiometric surface of <br />the spoils aquifer at each location. This data will be presented in an upcoming USGS <br />report. These eater levels exhibit normal seasonal variations. well 65-5 has been dry <br />for the entire period of record. It is apparently located in an area where the spoils are <br />unsaturated. <br />Ground water Level Summary. All alluvial cells are shooing distinct seasonal water level <br />fluctuations in response to periods of precipitation recharge or the lack of <br />precipitation. Overburden and coal well eater levels are fluctuating in response to the <br />precipitation recharge, induced ground eater flow to the mine pits, and in some cases, <br />changes in reservoir eater levels due to lower precipitation and mining-related usage. <br />Spoil well eater levels still indicate that only the furthest downslope highwall portions <br />of the spoil exhibit significant amounts of saturation. Levels in spoil wells near the <br />wedge Impoundment are largely controlled 6y water Level fluctuations in the impoundment. <br />5 <br />