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eh <br />ESPEY, HUSTON BASSOCIATES, INC. <br />• <br />2.0 ALTERNATIVE WATER SUPPLIES <br />Z.1 SURFACE WATER M,r~ <br />~-i/.w <br />Streamflow depletions caused by the mining process a~e small and <br />account for a very small percentage of streamflows in Curtis Creek. Streamflow <br />depletions will not impact the use of surface water north of the mine activities <br />because depletions will occur only at the subcrop of the coal and the fractured <br />overburden sandstones beneath the valley of Curtis Creek. The streamflow impacts <br />will occur downstream of the mine workings, or in the azea where Curtis Creek <br />flows out of the canyons and onto the plains. <br />Total stream depletions aze calculated to be Z7.1 acre-feet per yeaz or <br />0.037 cfs when the G-, P-, UP, J- and FF-seams aze being mined at the same time. <br />• The calculated stream depletions aze not measurable by standazd water resource <br />techniques and represent a very small percentage of the flows in Curtis Creek. <br />Because the depletions aze minimal, alternative surface water supplies aze not <br />required. <br />2.2 GROUNDWATER <br />There will be no impact on existing groundwater rights during mining of <br />the Meeker Area Mines. Drawdowns caused by mining will be limited to the coal <br />and fractured sandstone aquifers; there aze no wells in the azea believed to be <br />completed in the coals. There is limited groundwater development in the azea and <br />the combined coal seam and fractured sandstone aquifers occur at depths below the <br />land surface. Drawdowns will spread in the coal and fractured sandstone aquifers <br />from the mine face at distances equal to the hydrologic divide. Because the coal <br />seams aze located at depths greater than domestic and stock well depths, there will <br />be no impacts from mining on groundwater rights in the azea. <br /> <br />P-3 <br />