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significant change in water quality. <br />Surface coal mining and reclamation operations would be conducted to preserve, throughout the <br />mining and reclamation process, the essential hydrologic functions of the alluvial valley Floors <br />(4.24.2(1)). <br />The essential hydrologic functions of the Colorado River alluvial valley floor are those geologic, <br />hydrologic, topographic, and soil characteristics that give the area the ability to support Flood <br />irrigated agricultural activities. Subirrigation is a marginal function that is limited to a few of <br />the lower areas which are also capable of flood irrigation. Since no mining activities would take <br />place within the alluvial valley floor, the geologic, topographic, and soil characteristics of the <br />alluvial valley Floor would be unaffected. Mining activities are expected to have no effect on <br />the Rapid Creek/Cottonwood Creek hydrologic system. Water quality in the Colorado River <br />stream/alluvial aquifer system may be slightly degraded but the ability to flood irrigate the <br />alluvial valley Floors would not be affected. <br />The proposed operation is in compliance with the requirements of this section. <br />c:\wpdocs\rside\m-03 find.dtm <br />dtm/2/8/2000 <br />52 <br />