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t~ y 9 :, -.a .. , I J -GG <br />%'GD 13 b ~:: y ,~ Glr <br />~'7 '.~ i~-' o,,y <br /> <br />r .; <br />~~~ <br />:- r. , <br />• ~ 4 i ' t ~ I , D{~ <br />Table 5 Quality of Mine W~ at the tYest F.Ik Mine Doting the 1992 Water Year ~' <br /> ~ pH Conductivity TSS TDS Total Fe <br />Location Date ~~ units) (µmhos/cm) (mg/L) (mg/L) (mg/L) <br />MB-1 Discharge 1125/91 8.9 2050 I0.8 1550 0.29 <br />MB-1 Discharge 03/31/92 8.42 1550 3.6 1010 0.05 <br />MB-I Dischar a 05/13/92 8.7 1950 8.8 135 <br />MB= ischarge 1125/9! 8.3 520 7.8 380 0.06 <br />MB-2 Discharge 02/18/92 8.4 900 11.4 612 0.72 <br />MB-2 Discharge 03/12!93 7.95 1670 2.0 1070 0.32 <br />MB-2 Discharge 04/02/'92 8.2 950 19.8 524 0.83 <br />MB-2 Discharge 05/18/92 8.4 9W 3.4 579 O.II <br />MB-2 Discharge 06/09/92 8.4 950 3.8 560 0.00 <br />MB-Z Dischar e 07 2 0.25 <br />- and Grab 05/06/92 9.2' 13l(Y 946 27.0 <br />MB-6 Pond Grab 06/03/92 8.T 650' 390 37.7 <br />MB-6 Pond Grab 09/08/93 9.1' 1030' 642 31.6 <br />Note: <br />' Field measurements <br />~~. ~, ~:a~. Ica{ <br />Table 6 Mine Water Balance for the West Elk Mine ' .) :,I ~'~ J • ; ~, ' / <br />t;• <br />Parameter <br /> <br />Water pumped to FW-1 from the North Fork <br />Potable water processed <br />Water pumped underground <br />Water discharged from underground - <br />Water leaving the mine on coal as added muisturc <br />Water leaving the mine on gob as added moisture <br />Water transferred from MB-1 and MB-2 w FW-I (estimatc) <br />Water leaving the mine in ventilatin air end seepage <br />Vulumc (Acre-feet) <br />92.5 ~' <br />~ 12.3 <br />k r l ~.f ~ t ~orJ <br />63.2. <br />. d I'~ti C„ t -. 36.6 <br />r/ ': ~ "• 20.6' <br />17.1_ <br />Estimated sustained Flow ('I,~ (~ 7iJ~~ ;( ~'~,,~-n (d II 5.0 <br />'~JI'otal mine water inflow (estimate) ~ ~ (~''` (t~' ~ EG G8.2 <br />Totfa-l mine water outflow (estimate) ~ ! . ,;,:' ~ S 1 bt ~)g~r G1 t('Nt~t%i:' + {f ((~ jl~ 74.4 <br />( i / ~ I r ~ <br />I~ ( b <br />~ r i <br />'1. v <br />.~ <br />• (~ ~ " <br />~ 7 4; <br />`, LPL iii:.. ~~D <br />-- -6': - <br />~. ~: ~l ~ <br />.. , <br />- ~ I c <br />f ~C <br />~I <br />J 1i :K't0 . <br />!1 <br />q I, ~h=; , <br />•, <br />