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The water within the perched aquifer flowing into the mine <br /> probably comes from surface water infiltration along the faults <br /> east and west of the mine. This assumption is supported by the <br /> cyclical nature of water inflow corresponding with periods of <br /> precipitation. Both faults have ephemeral drainages crossing <br /> their surface trace near the mine and may receive water from the <br /> drainages . The water then infiltrates the coal seam which has <br /> become saturated over time. <br /> MUNGER CANYON MINE <br /> To date there has been no water encountered by this mine; <br /> therefore. there has been no effect on the hydrologic regime of <br /> the area. A current mine workings map is included as Figure 2 and <br /> Table 1 documents that there has been no water imported or used at <br /> the mine. <br /> PRECIPITATION <br /> The 19B9 water- vear was the driest of the der_ade (See Table 3 ) . <br /> Only 13 . 28 inches of precipitation fell durinu the year . This <br /> quantity was 65% of the aver,iue for the decade. Most of the <br /> precipit&,cion occurred as snow between November and March (9 . 22 <br /> inches ) . Om y about 4 incites of precipitation fell during the <br /> er owing season . As can be e:•:uected g i vcn zhuse quantities , <br /> streamflow was minimal . <br /> EFFECT OF THE MINES ON THE EAST SALT CREEK REGIME <br /> Surface Water <br /> Due to the limited disturbance of the mines there is little chance <br /> That any sicnificant effect the quintiry or- quality of the <br /> _.urface wateis near either mine sites has occurred. As the <br /> Division notes in its approval Package for the Munger Carrv,o;l Hine. <br /> the total area that will be disturbed by both mine sites amounts <br /> to 0 . 12 percent. of the area of the East Salt Creek drainage nasin <br /> above the mines . <br /> Surface water samples are beinci taken on both McClane Creek ( SW-2 <br /> and SW-S ) . Munger Creek (SW-3 ) . and Est Salt Creek (SW- 1 _-rid SW-8) <br /> as required by the approved monitorina program. Results or _ire <br /> quarterly samplinu for each monitorinu site �_-re shown on laole 1 . <br /> Both McClane and Munger creeks were dry most of the year . is <br /> should be noted that most of the time sampling was attempted <br /> durino rainstorms . It takes an intense storm to cause the creek <br /> to run. Many times these events occur late at night or at other <br /> times when emplovees are not present. As rioted earlier the <br /> precipitation in the area decreased significantly this vear ,end <br /> even East Salt creek was dry during the Third quarter of 1989. <br /> Place - 3 2/ 19/90 <br />