Laserfiche WebLink
i <br />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 eplieiner'al drainages grossing <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 cncountercd by this mine: <br />therefore. there has been no effect on the hvdroloa_ic regime of <br />the area. A current mine workings map is included zs Figure 2 end <br />Table 1 docunir•nt.c that there has been no water imported or used at <br />tl~e mine. <br />PRECIPITATION <br />The 1989 water year was the driest' of the decade(See Table 3). <br />Only 13.25 inches of precir~itation fell during the year. This <br />Quantity was GS`7 of tr~c average for the decade. Most c„ the <br />pr-ec i p i tst i on occur r~•d .~, snow between Ivovembur and Marcl ~ ( 9 , 2 <br />inches). Oniv about 4 incises of w-eciuitation fell during t~rc <br />growing season. As car, lie expecteu given these quanti-ies. <br />s*_reamflow was minimel. <br />EFFECT OF THE MINES ON THE EAST SALT CREEK REGIME <br />Surface Water <br />Due to tf~e 1 i mi tad d i stur-!Nance of the n~ i lies there i s i i rt i e chzrn. e <br />that any significant efraet on thu Quantity or quality of ciie <br />surface water_ near cit:ier mine sues has occurred. As the <br />ii i v i s i on notr=~s i r~ i is a~-~rovy 1 paci.~~ae for the t^un~~rr ~:~nvon hl i ne . <br />t!-ie total area that wi I ! tie disturbed by both mine =.ites amounts <br />to 0.12 percent of the arc%~ of the East Salt Creek cir~inaga basin <br />above the mines. <br />Surface water samples are being taF:c~n on both McClave Creek (SW-L <br />and SW-S), Munger Creek (5W-3), and Est Salt Creek (SW-i any! SW-&; <br />as required by Tile ar=~provr_•d mon i for i ng program. r esul is of i;he <br />quarterly sartir~l'.ng for c3ch monitoring site are shown on Vole 4. <br />Both McClave ar~d Munq_er creeks were dry most of file year. !'c <br />should be noted ti-,at roost of the time ssmpling was attemot~d <br />during rainstorm;. It takes an intense storm to cause the creek <br />t.o run. Many tunes these events occur late at night or at ether <br />times when employees are not. present. As noted earlier t.hr; <br />precipitation in the area decreased significantly this year ;eiid <br />even East Sa 1 t creek. was ~-lrv dur i no the tl ~ i rd quarter of 1959. <br />Pane - 3 <br />2/19/90 <br />