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These comparisons, along with eerl.y measurements of unconfined conditions at Vell 3Ef, • <br />indicate that the Vadge Underburden is not in hydraulic communication with the overlying <br />and underlying confined coat units. The Votf Creek Coal unit, discussed in the following <br />section of this Tab, is the nearest unit beneath the Vadge Coal which contains sufficient <br />water to be classified as an aquifer as defined on Page 9 of the Regulations of the <br />Colorado Mined Land Reclamation Board for Coal (lining. The Vadge Underburden is comprised <br />of interbedded sandstones, shales, siltstones, and thin coals, serving as a relatively <br />impermeable barrier averaging 770 feet thick between the two coal seams. The Vadge <br />Underburden does not contain sufficient water to be classified as an aquifer. <br />Wolf Creek Coal Water Levels. Five monitor wells (GV-S2W-2VC, -3VC, -3EWC, -4VC, and <br />-17WC) have been completed as of October 1, 1989 to monitor water levels in the Wolf Creek <br />coal aquifer at Seneca II-V. Exhibits 7-1 and 7-4 show the Wolf Creek coal monitor cell <br />locations and the potentiometric surface for the Wolf Creek coal aquifer, respectively. <br />Water level data for Vells GV-V2W-2WC, -3VC, -3EWC, and -4VC uas collected from February <br />and May of 1980 through 7985, 1989, 7983, and 1986, respectively. Water level monitoring <br />• <br /> <br />16b Revised 02/11/94 <br />