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

•
U
Table E49-7
Underground Mine Water Balance -Future Years ~
Case 2 - some tastern ana tvortnern meow urvenea to t to sum p aver sump uewatereo

Water Year 1999 2001.1 2001.1 2002 2005 2010 2014
Units
115 -Fish Creek
WMD rbr gpm 55 55 55 55 55 55 55
umhos/an 2900 2900 2900 2900 2900 2900 2900
Water in Storage allons 4.81 E+08 2.10E+OB 2.10E+OB 2.10E+OS 2.10E+08 2.10E+08 2.10E+08
umhoslcm 7300 6600 6600 5200 3800 3800 3800
Average Discharge gpm 300 300 300 300 300 300 300
umhos/cm 7300 6600 6600 5200 3800 3800 3800

109-Portal
North Mains ~°~ gpm 45 45 45 45 45 45 45
umhoslcm 2900 2900 2900 2900 2900 2900 2900
EMD "~ gpm 85 85 85 85 85 85 85
umhos/cm 2900 2900 2900 2900 2900 2900 2900
6 Right gpm 200 200 200 200 200 200 200
umhos/cm 4700 4700 4700 4700 4700 4700 4700
Water soravs
Coal production tontyr 8,000,000 8,000,000 8,000,000 8,000,000 8,000,000 8,000,000 8,000,000
Usage"~ gpm 167 167 167 167 167 167 167
Loss to coal r°r 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
umhos/cm 2900 290D 2900 2900 2900 2900 2900
NMD 8 NWMD ~~ gpm 30 30 40 100 190 270
umhoslcm 2000 2000 200D 2000 2000 2000
Diverted to 115 sump gpm 245 245 245 245 245
Average Discharge gpm 342 372 127 137 197 287 367
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 gpmlac (see text)
d) 1998 usage was 208 gpm at 7,900,000 tons 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 8 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 9372 Table E49-7 ,qpp~®~y~ FEB 0 8 2000 5/3199