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<br />4 Mined Land Reclamation 11 October 13, 1992
<br />TABLE 2 CONT'D
<br />STATION U23
<br />July, 1987 404,212.45 1,441,756.40 6143.78
<br />October, 1987 404,212.44 1,441,756.41 6143.81
<br />June, 1988 404,212.50 1,441,756.44 6143.78
<br />November, 1988 404,212.51 1,441,756.44 6143.79
<br />July, 1989 404,212.57 1,441,756.45 6143.75
<br />November, 1989 404,212.64 1,441,756.43 6143.75
<br />July, 1990 404,212.67 1,441,756.43 6143.74
<br />November, 1990 404,212.81 1,441,756.42 6143.72
<br />July, 1991 404,212.80 1,441,756.50 6143.75
<br />November, 1991 404,212.83 1,441,756.46 6143.74
<br />July, 1992 404,212.92 1,441,756.46 6143.74
<br />Mean 404,212.65 1,441,756.44 6143.76
<br />Relative movement between surveys is shown in the following
<br />Tables.
<br />Table 3 Subsidence - Relative Movement
<br />Period of November, 1991 to July, 1992
<br />Table 4 Slope Stability - Relative Movement
<br />Period of November, 1991 to July, 1992
<br />TABLES-SUBSIDENCE
<br />SUBSIDENCE POINT CHANGES - RELATIVE MOVEMENT
<br />NOVEMBER, 1991 TO JULY, 1992
<br />Point Horizontal Distance Bearing Elevation
<br />No.
<br />UT2 0.42 N09°49'W -0.17
<br />U4 0.38 N23o52"W -0.15
<br />U1 0.39 N34°00'W -0.20
<br />U3 0.19 N66°10'W +0.06
<br />U2 0.18 N64°09'W No Change
<br />U5 0.16 N87°50'W +0.13
<br />U9 0.13 N59o00'W +0.04
<br />UA1 0.29 N29°41'W -0.15
<br />U8 0.08 N25°34'W +0.02
<br />The change in horizontal position can be attributed to a variety
<br />of factors (1) the error of closure and adjustment inherent in
<br />any survey; (2) using new field surveying equipment; (3) actual
<br />movement of the monuments due to subsidence. The error of
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