PERMFILE40846

• Permit No: C1981013
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 06 HYDROLOGY, GEOLOGY, AND WATER QUALITY
• Media Type: D
• Archive: No

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Table 3 Summary of Parameters Used For Inflow Calculations
To Maxwell Mine
T Ka ba
Lase ft2/d ft/d ft
I 0.56 2.1x10' 225
II 1.98 "
III 1.27 "
Computation of Inflows
The calculation of inflows was made for each of the above three cases
using the roof area and perimeter length of the current Maxwell Mine and of
the protected Maxwell M1ne. An example computation is provided for the
projected mine using the data for Case III. The results of all computations
are summarized to Table 4•.
B_~76~1t ~ = TQ°
k a //
Example
8 ( 1.27 225 1/2 1166 ft.
Q ^ 1.27 225 0.245 ft2/d
Inflow from face (0.245) (4.6x104) ^ 1.13x104ft3/d 59 gpm
Inflow from roof ^ (2.1x10-4) (1.1x108) ^ 2.31x104ft3/d ^ 12CI gpm
Total Inflow 59 + 120 179 gpm
Table 4 Summary of Maxwell Mine Inflow Calculations
I~
Current Mine
Case I
Case II
Case III
Roof Face Total
gpm aam gpm -I
2 7 9 = ~ ""'-
2 14 16 ~'
2 11 13 •' ~ ~~
Projected Mine
Roof race Total
apm gpm gpm ,
120 39 159
120 73 193
120 59 179