PERMFILE67692

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 49 PHC Modification Support Tables
• Media Type: D
• Archive: No

Table E49-6
• Underground Mine Water Balance -Future years
Case 1 -All Eastern and Northern Inflow to 109
U
Water Year 1999 2001.1 2001.1 2002 2005 2010 2014

115 -Fish Creek Units
__
WMD tb~ _
gpm 55 55 55 55 55 _ 55 55
_
umhoslcm 2900 _
2900 2900 2900 2900 2900 2900
Water in Storage gallons 4.81E+OB 2.10E+08 2.10E+08 2.10E+08 2.10E+08 2.10E+08 2.10E+08
umhoslcm 7300 6700 6700 6300 5400 4400 3900
Average Discharge gpm 300 300 55 55 55 55 _55
___
109-Porta~ _
umhoslcm 7300 6700 _
6700 6300 5400 _ 4400 _ 3900
North Mains rBI gpm 45 45 45 45 45 45 45
umhos/cm 2900 2900 2900 2900 2900 2900 2900
_
EMD ~`~ ~ gpm 85 _ 85 85 85 85 85 85
i
6 Right I u~mhos/cm
gpm_
umhos/cm _
2900
_ 200
4700 2900
__200
4700 2900
200
4700 2900
200
4700 2900
__200
4700 2900
200
4700 2900
200
4700
Water soravs
Coal production
ton/yr _
8,000,000
8,000,000
8,000,000
8,000,000 _
8,000,000
8,000,000
8,000,000
Usage~di gpm 167 167 167 167 167 167 167
Loss to coal rG~ gpm 55 55 55 55 55 55 55
__ Recycled gpm 100 100 100 100 100 100 100
Net Added gpm 12 12 12 12 12 12 12
__ umhoslcm 2900 2900 2900 2900 2900 2900 2900
NMD & NWMD ~~ gpm 30 30 40 100 190 270
__ umhoslcm __ 2000 2000 2000 2000 2000 2000
Average Discharge gpm 342 372 372 382 442 532 612
umhoslcm 4000 3800 3800 3700 3500 3300 3100
dotes
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 165 gpm at 7,900,000 tons per year, previous 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 10/27198
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
TR 9&J2 Table E49~ flP P 9t 0 V ~ ~ FEB 0 v 2000 5/3/99