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-23- <br />• • <br />V. Surface Water Hydrology (cont'd) <br />The surface water monitoring plan includes monitoring sedimentation pond discharge <br />points wherever there is a discharge, mine dewatering discharge points quarterly, <br />points on the Colorado River above and below the mine site quarterly, and continuous <br />monitoring of flow in Rapid Creek mine water discharge points will be sampled in <br />accordance with the National Pollution Discharge Elimination System (NPDES). The <br />Colorado River will be sampled quarterly and analyzed for those chemical parameters <br />which are required by the Division. <br />The applicant has submitted information on the quantity of water flowing in Rapid <br />Creek below the confluence with Cottonwood Creek. To assess the impacts of mining <br />under Cottonwood and Rapid Creeks, the applicant will continue to monitor the <br />flows below the confluence. Water quality analyses are not necessary, since there <br />will be no surface disturbance in the drainage basin. <br />The overland conveyor system and a portion of the disturbed area at_the Ioadout <br />facility are within 100 feet of the Colorado River. A portion of the overland <br />conveyor crosses the Colorado River. That portion of the overland conveyor is <br />completely enclosed. This conveyor is an existing sturcture, therefore, the Division <br />authorizes those activities associated with the overland conveyor and disturbed area <br />near the Zoadout facility within 100 feet of the Colorado River. <br />The following finding is required in order to allow Powderhorn Coal Company to <br />conduct surface coal mining operations within I00 feet of the Colorado River: <br />Z) Pursuant to Rule 4.05.18 the Division finds that the original stream channel <br />will be restored. There will be no disturbance of the stream channel by the <br />surface coal mining operations. <br />2) During and after mining, the water quantity and quality from the stream <br />section within 100 feet of the surface coal mining operations will not be <br />adversely affected. A11 runoff from the disturbed area will be treated in a <br />sediment control facility then released. Following completion of mining, the <br />disturbed areas will be reclaimed and water quality and quantity should return <br />to natural conditions. <br />3) The reclamation plan will call for reestablishment of riparian vegetation <br />where disturbed. The seed mix for this area will be detezmined following the <br />collection of vegetation data (see Section x2). <br />The proposed operation is in compliance with the requirements of this section. <br />VI. Ground Water Hydrology (2.04.5, 2.04.7, 2.05.6(3)_,_ 4.05) <br />Information on ground water hydrology, which was reviewed by the Division for <br />compliance, can be found in Sections 2.04.5, 2.04.7 and 2.05.6 of Volumes I and V <br />of the permit application. <br />The water table in the permit area and adjacent area is directly correlatable to the <br />elevation of the Colorado River. Rock formations and alluvium below the Level of <br />the river are recharged by the Colorado River and have piezometric levels equal <br />to that of the river at the recharge zone. <br />p. ~ V <br />