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but since the adjacent Y..30 wells monitor the same strata, YW7 and YOV9 are no longer <br />necessary. 0 <br />- Wells YW14 and YOV15 (old USGS wells nested together): These wells exist in an isolated 0e, not <br />hydraulically connected) block of coal in the southwest corner of the permit area that was <br />never mined. YW14 never had more than 2.3 feet of water in the well. YOV15 was often <br />dry, but never had more than 0.68 feet of water in the well. <br />Literature C ited <br />Brankensiek, D.L., H.B. Osbom, and W.J. Ranls. 1979. Field Manual for Research in Agricultural <br />Hydrology. U.S. Department of Agriculture, Agriculture Handbook. 550 p. <br />Buchanan, T.J. and W.P. Sumers. 1968. Stage Measurements at Gaging Stations. U.S. Geological <br />Survey TWI 3 -A7. 28 p. <br />Driver, N.E. and R.S. Williams, Jr. 1991. Water - Quantity and Water - Quality Data for an Area Leased to be <br />Surface Mined for Coal in Northwestern Colorado. U.S. Geological Survey Open File Report 90 -708. <br />Denver, Colorado. <br />Williams, R.S., Jr. and N.E. Driver. 1982. Plan for Hydrologic Study of an Area to be Surface Mined for <br />Coal in Northwestern Colorado. U.S. Geological Survey Open File Report 82 -874. Denver, Colorado. <br />• <br />TR -47 33 Revised 4/10 <br />