PERMFILE125988

• Permit No: C1981010
• IBM Index Class Name: Permit File
• Doc Date: 3/17/1993
• Doc Name: Annual Hydrologic Report
• Section_Exhibit Name: Appendix W 1992 Report Section 2.5
• Media Type: D
• Archive: No

precipitation pattern. The water level in the OR well ,GP5
responded similarly.
2.1.2 WATER-LEVEL CHANGES
The water-level r_hsnges for the period of record .a re presen'led
as Figures A-1 to A-39 (Appendix A). Tabulated depth to water and
water-level elevations are in this annendix also. Water level
h
i
ll
fl
h
b
l
l
c
anges
n many we
s re
ect c
arges o
served in ann
aa
ti
i
it
Fi
2
1
7
l
l
prec
p
a
on amounts.
gure
-
(page 2-1
) presents ann
a
precipitation totals at Trapper Mine. showing that 1992
precipitation was normal. Table A-1 (page A-40) in Appendix
A
)
presents the water-level data for wells GA1. GA2, GB1 and GR2.
Water-level changes for well GA1 are shown on the hydrographlon •
Figure A-1 of Appendix A. The 6~ coal seam vas mined less than 10
00
`
f
t t
th
t d
1988
i
d
h
d R
d
ee
o
e eas
ur
ng
an
t
e 9 an
seams were mine
1700 f
i
l
f
approx
mate
y
eet west of this well during 1992. Wa
er
levels were rapidly rising in 1984 and then declined to an avenge
rate of three feet Fer ,year during 1935. These rises are thought
to be due to increased recharge from above average precipitationlin
1983 and 1984 (see Figure2-1). Water levels declined at a higher

rate from 1987 through 1991 but have become fairly steady in lase
1991 .and 1992. At least some of this decline in water levels `is
thought to be du? to a decline in the rer_har~e from the decrease in
d b
th
d
i
S
f
b
.ia_r_et
pracipit.=_t
e _ause
e a
or..
ome o
the decline may
y
mine dewatering in D pit.
Water levels for well GA2 (Figure A-2? have responders i
°-4