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effect, taking a faster flow path to the Cement Creek watershed than it would have had under <br /> natural conditions. <br /> Adjacent to underground workings in those areas where major fractures do not exist, the <br /> hydraulic gradient is very steep in the direction of the mine workings. For example, diamond <br /> drill holes oriented perpendicular to the American Tunnel at the 0700 and 1500 "runarounds" <br /> encountered water under considerable pressure when they intersected permeable fractures. Some <br /> of these diamond drill holes have been partially cased and equipped with valves. Even today, <br /> one of these valved holes will spurt over 30 gpni across the full width of the runaround when <br /> opened. It is very likely that there are saturated fractures directly above most of the American <br /> Tunnel. <br /> 4.1.4 Ground-Water Chemistry <br /> The water chemistry of the bedrock flow system has probably not been significantly altered by <br /> the presence of the Sunnyside Mine. The water chemistry of the bedrock flow system is <br /> described in section 3.1.5. The water chemistry of the open channel flow within the Sunnyside <br /> Mine workings is described in section 4.2.2. <br /> 4.1.5 Recharge to the Around-Water System <br /> Recharge to the ground-water flow system (which is not considered to include open channel flow <br /> within underground workings) has probably not been significantly affected by the presence of <br /> the Sunnyside Mine. There may be a slight decrease in recharge due to the draining of Lake <br /> sanjuan\sumry\110361\oct9l.Rpt 33 <br /> a snon n1n0=aEHncH <br />