HYDRO20781

• Permit No: C1981032
• IBM Index Class Name: Hydrology
• Doc Date: 5/27/1981
• From: NORTHERN COAL CO
• To: MLR
• Permit Index Doc Type: CORRESPONDENCE
• Media Type: D
• Archive: No

.~
Northern
~
, Coal
Company
CURTIS CREEK SUBSIDENCE MONUMENTS

~~ Second, eighth week of weekly monitor ing. Rienau No. 2, 1st East, 2-Right i.s 120 feet
from Curtis Creek when monitored for elevation.
DIFFERENCE
ORIGINAL PRESENT FROM ORIGINAL
1S7NUMENT O ELEVATION ELEVATION TO PRESENT
8 6,905..36 "' 6,905.45' /
+ +0.09'
10 6,905.89 ' 6,905.88 ' -0.01'

11
6,906.00'/
6,905.98
' .
-0.02' /
`
~ 12 6,910.53' 6,910.47' / -0.06' r
13 6,908.90' ~ 6,908.81' -0.09'
14 ~ 6,904.20 "" 6,904.06' /
`x -0.14'
1 15 6,900.09' / 6,899.93' /
/ -0.16'
16 6,907.66' v 6,907.66 ' 0.00' ~
17 6,908.33 ' 6,908.33 ' 0.00' "
18 6,909.07' ~ 6,909.07' \~ 0.00'
NOTES•
i) Vertical co~rol for monuments a r based on the U.S.G.S . Bench Marks H-384
(6,927.535) and G-384 (6,381.08 9
Survey done on March 13, 1981. ~
Notes are recorded in Book No. 37 on pages 60 through 63.E
.18/mjb
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