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 E49-3
Underground Mine Water Balance
Water Years 1989 to 1998
Water Year 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998

Inflows
North Mains ~'~ Units

gpm

45

45

45

45

45

45

45

45

45

45
Western Mining District ~b~ gpm 91 38 3 99 138 98 75 55 55 55
East Mining District ~`~ gpm 16 20 45 65
_
6 Right gpm 200
Water sprays
Coal production
ton/yr
850,000
2,700,000
3,300,000
3,200,000
3,900,000
5,000,000
5,700,000
5,500,000
7,100,000
7,900,000
Usagei°~ gpm 18 56 69 67 81 104 119 115 148 165
Loss to coal ~°~ gpm 6 _ 18 23 22 27 34 39 38 49 54
Discharge
109 - Foidel Creek
gpm
148
49
27
99
135
90
49
_ 13
0
0
115 -Fish Creek gpm 72 67 90 103 63 63 27 0 4
Net to Storage ~0
Rate
gpm
0
0
0
0
0
61
104
157
245
472
Annual volume gallons _ _ 3.19E+07 5.46E+07 8.25E+07 1.29E+08 2.48E+08
Cumulative Volume gallons _ _ 3.19E+07 8.65E+07 1.69E+08 2.98E+08 5.46E+08
~ 0 0 0 0 0 61 104 157 245 472
~ Note: a) Estimated from1997 Annual Mine Inflow Survey
`.i9 b) 1989 to 1993 calculated: total discharges -total inflows. 1994 to 1996 based upon measured inflows
® 1997 to 1998 fixed at 55 gpm based upon Mine Inflow Surveys. Note that 1993 inflows included
~ 80 gpm from dewatering of the 1st South Panel 1991 inflows affected by sealing of 1st Panel South
C c) Estimated from Annual Mine Inflow Survey and area mined.
-n d) 1998 usage was 165 gpm at 7,900,000 tons per year, previous years pro-rated by production rate
m
~ e) Water added to coal by sprays estimated from difference between equilibrium and as shipped moistures (1.5%)
" f) No significant water added to storage until 1994. Subsequent years: total inflow -total discharges
'A
N
O
O
0
TR 99-3Z Table E49-3 5'3'99