REP36532

• Permit No: C1981033
• IBM Index Class Name: Report
• Doc Date: 3/30/1989
• Doc Name: SUBSIDENCE & SLOPE STABILITY MONITORING REPORT
• From: MLRD
• To: CRAIG SPRINGER
• Permit Index Doc Type: SUBSIDENCE REPORT
• Media Type: D
• Archive: No

• Mined Land Reclamation 10 Decemoer C2, 1`+EE
•
TFre er•r-or iri horizontal position is due to tyre error inh~er-ent to
arty survey. The error- of closure for- this tr-[rvercp wr.s 0.17 feet
of Prror in a t.ntal traverse distance cif 1C,20.'.~:", tc~r~t wh~cfi
reflects a closure rario of 1 part. in 109,000.
Tree elevations show a change that. reflects ; drop in value of
0.04 feet. on t.Fie average.
TABLE 5 -SUBSIDENCE
SUBSIDENCE POINT CHANGES - RELATIVE MOVEMENT
JUNE, 19E:r TO Nl)VEMBER, 1'ac: o'
Point. Horizontal Distance Rear-irig Elevation
No.
lIT2 0.02 N50°1.2'W -0.05
U4 O.OS N21°4~'E -0.1a
Ul 0.04 Nor-t.Fi -0.0~:
U3 O.lE, NO,,°'S'E -0.1;,
U2 0.0'~ NOe~°20'W -0.13
US 0.03 East -0.15
U'a 0.05 N11°1'a'E -0.13
UAl 0.04 West -D.i2
Uc^^• O.D~ S71°~4'W -0.12
The error- of closure for- t.t'iis t.r-aver-se was 0_?6 feet. of error- iri
a total t.r-aver-se distance of 1_~,207.'~: feet. wt•~ich reflects a
closure ratio of 1 part in 50,000.
Ttie elevations show a change that reflect a drop in value of
-0.12 feet. on the average.
Tfie closures of our- elevations using tr-igor~ometric leveling have
been very good. Errors ranging from 0.10 feet t.o no error.
TABLE 6-SLOPE STABILITY
RELATIVE MOVEMENT
OCTOBER, 187 TO JUNE, 198:
BEAR MINE N0. 3
Point Horizontal Distance Bearing Elevation
No.
U16 O.I3 N04°24 'E -0.02
U17 D.13 SE•3°2h'E -0.03
UlE 0.16 S68°12'E -0.05
•
U19 0.16 S47°24'E -0.11
U23 0.07 N2E•°34'E -0.0~