APPCOR10826

• Permit No: C1983058
• IBM Index Class Name: Application Correspondence
• Doc Date: 12/12/1983
• From: TWIN PINES COAL CO INC
• To: DNR
• Media Type: D
• Archive: No

Memo to Twin Pines from L, G, White, Dec, 6, 1983
Page 3
d) Drawing No. TP-6 eras derived from aerial photographs and
field reconnaissance of the mine area, Outstanding features
in the area which may contribute to the water supply at the
mine are as follovrs;
1) The mine slope eras developed near the creek bed,
possibly crossing the alluvial base in the stream bed,
A hand-dug well downstream from the slope would
indicate the presence of an underflow in the alluviam,
2) A clay pit, excavated to within 20 feet of the coal seam,
lies adjacent to the mine slope, There is standing water
in the bottom of the pit,
3) Several strip mines have been developed in the Brookside
seam updip from the mine, It vras reported that the
coal in the high wall was augered after stripping,
y.) Examination of an aerial photograph of the mine area
indicated the presence of a fault which when projected
crossed the air shaft of the mine, The strike of the
possible fault is approximately S 28° W. Field recon-
naissance in Coal Creek Canyon indicated a substantial
roll in the sandstone formation outcropped in the south
wall of the canyon in the area of the possible fault.
The water flowing in Coal Creek disappeared just downstream
from the roll, Examination of the mine map from Coal
Creek Canyon P9ine confirms the presence of a source of
water along the strike of the possible fault,
5) The erater table in a cased drill hole, known as Hole CC-42,
aeaa tau down din from the abandoned Twin Pines Mine
correlates with the water table in monitoring Well No,
TP-W1, The workings near the yell were reported to be
dry.
3.
Conclusions: The follovring conclusions can be drawn after review
of the facts presented above,
a) There are at least two distinct separate sources of water
contributing to the accumulation of water in Cal dirola No, 2
Mine: 1) The aquifer underlying the Brookside coal seam
contributes to the pool in the westerly portion of the mine;
as reported in the S,O,A,P. report and by men who worked in
the mine, production from this aquifer is very low, 2) Water
in the upper portion of the mine results from a spring in the
rock slope and possibly contributions from surface sources.
The vrater quality of the upper pool is certainly not what
would be expected from vrater in an abandoned mine,
b) The roll in the coal below the upper sump trapped spring
water to form the upper pool,
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