2009-10-30_PERMIT FILE - C1982056 (8)

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Table E51-8 Underground Mine Water Balance -Future Years Case 3- Some Eastern and Northern Inflow Diverted to 115 Sump Water Year 1999 2001.1 2001.1 2002 2005 2010 2014 115 -Fish Creek Units WMD ro~ pm 55 55 55 55 55 55 55 umhos/cm 2900 2900 2900 2900 2900 2900 2900 Water in Storage gallons 4.81E+08 2.10E+OS 2.10E+08 2.10E+08 2.10E+08 2.10E+08 2.10E+08 umhos/cm 7300 4800 4800 4200 3700 3700 3700 Average Discharge pm 600 600 405 405 405 405 405 umhos/cm 7300 4800 4800 4200 3700 3700 3700 109-Portal North Mains (aI m 45 45 45 45 45 45 45 umhos/cm 2900 2900 2900 2900 2900 2900 2900 EMD t0~ m 85 85 85 85 85 85 85 umhos/cm 2900 2900 2900 2900 2900 2900 2900 6 Right pm 200 200 200 200 200 200 200 umhos/cm 4700 4700 4700 4700 4700 4700 4700 Water SpraVS Coal reduction ton/ r 8,000,000 8,000,000 8,000,000 8,000,000 8,000,000 8,000,000 8,000,000 Usagetdl pm 167 167 167 167 167 167 167 Loss to coal let gpm 55 55 55 55 55 55 55 Recycled pm 100 100 100 100 100 100 100 Net Added m 12 t2 72 i2 12 12 12 umhos/cm 2900 2900 2900 2900 2900 2900 2900 NMD &NWMD ~'~ pm 30 30 40 100 190 270 umhos/cm 2000 2000 2000 2000 2000 2000 Diverted to 115 sum m 300 300 350 350 350 350 350 Average Discharge m 42 72 22 32 92 182 262 umhos/cm 4000 3800 3800 3700 3500 3300 3100 Notes a) Estimated from Annual Mine Inflow Surveys. b) Based upon Annual Mine Inflow Studies c) Estimated from Annual Mine Inflow Survey and area mined. Mining rate is approximately 700 acres and yield is estimated to be 0.027 gpm/ac (see text) d) 1998 usage was 208 gpm at 7,900,000 ions per year, future years pro-rated by production rate e) Water added to coal by sprays estimated from difference between equilibrium and as shipped moistures (1.5°~) f) Estimated from area to be mined. Mining rate is approximately 700 acres and yield is estimated to be 0.027 gpm/ac (see text) g) Water Quality Sources (values rounded to significant figures) WMD: Average of groundwater inflows from WMD and North Main, 1994 Mine Inflow Study Water in Storage: Sample from 115 taken 10/27/98 North Mains: Average of groundwater inflows from WMD and North Main, 1994 Mine Inflow Study EMD: Taken from average of EMD inflow, 1997 Mine Inflow Study Water Sprays: Average for Pond A water (source of underground makeup water, taken from 1997 AHR 6 Right: Water sample collected 3/30/99 . NMD &NWMD: Estimated; since they are much further from outcrop, they will be more influenced by the water quality from the Wadge Overburden that has not been affected by spoils TR07-59 Table E51-8 04/02/07