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~~ <br />4.6.2.3.7 Ground Water <br />The shallow ground water functions at the site are directly related to <br />the surface water functions. The Roaring Fork River appears to alter- <br />nate between a gaining and losing stream in the vicinity of the <br />loadout. Ground water measurements taken May 22, 1980 from one moni- <br />toring well and two surrounding domestic wells located that water <br />table between elevations 6034 and 6032. The normal water surface of <br />the river ranges between 6042 near the southeast corner of the site to <br />6016 near the northwest portion of the permit area. This may indicate <br />that the river is "losing" flow to the alluvium near the southeast <br />portion and is "gaining" flow near the northwest portion. Ground <br />water in the alluvium adjacent to rivers can generally be expected to <br />• flow approximately parallel to the direction of the river. <br />The natural interactions of surface and ground water at the loadout <br />are altered by man-induced effects of flood irrigation and water con- <br />veyance. The applica±ion of surface waters as irrigation can be <br />expected to result in seasonal fluctuations of the water table when <br />irrigation application exceeds the crop water requirements. The over- <br />application of irrigation water and hence ground water recharge, is <br />most likely to occur early in the growing season and in those years of <br />abundant irrigation supply. Fluctuation of the water table in the <br />alluvium can also be expected to result from seasonal variation of the <br />water level in the Roaring Fork River. <br />Operation of the loadout facility will alter the essential ground <br />•~ ~ _~ <br />4-142 APR 1 9 'i983 <br />L _ T _ <br />