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<br />~J
<br />Mined Land Reclamation
<br />TAPLE 7 CONTINUED
<br />U22 SURVEY EY CDJ
<br />March 1., 1987
<br />STATION U22 OIVLY
<br />Page 14
<br /> Nerthir~g Easting Elevation
<br />5/24/86 401,687.98 1,4.'9,425.48 6997.57
<br />5/31/86 4~?1,687.96 1,439,425.46 6997.47
<br />6/7/86 401,687.98 1,439,425.42 6997.51
<br />6/14/86 401,687.96 1,49,425.46 6997.53
<br />6/21/86 401,687.94 1,439,42J.St1 6997,51
<br />6/28/86 401,687.98 1,49,425.49 6997,52
<br />7/19!86 401,688.OCs 1,439,425.40 6997.55
<br />8/16/86 401,687.89 1,49,425.44 6997.5~
<br />9/27/86 401,687.97 1,439,425.5 6997.79
<br />lC~/18/Bb 401,688.02 1,439,425.38 6497.39
<br />11/16/86 401,687.95 1,439,425.5U 6997.~9
<br />MEAN 401,687.97 1,49,425.44 6997.52
<br />Note: 10/18 New F'rism
<br />Checl: Survey by SPC:
<br />July, 1986 401,687,49 1,439,425.44 6947.50
<br />November, 1986 401,688.UC> 1,439,425.44 6997,37*
<br />+~ November 1986 U22 tied by triangulation
<br />CONCLUSIONS
<br />Some movement has occurred along the mine bench. This is
<br />eevidencd by the slide in the vicinity fo the fan e;;haust. Same
<br />movement may also have occured near monument U21. The ground in
<br />the vicinity of the monument shows surgace displacement caused by
<br />a small landslide. No subsidence is evident in the area.
<br />As we gather more data through additional surveys, more precise
<br />positioning will be possible. The fluctuation in vertical datum
<br />is due to effect of vertical angles over a very long distance.
<br />However, the changes are relatively small and the alternative to
<br />eliminating them immediately with an e>;pensive and time-consuming
<br />level loop is to continue gathering and averaging data the way we
<br />have in the past. Any movement should be detected using these
<br />procedures,. and if necessary more wor4: could be incorporated at
<br />that time. Movement will show up whether we use curvature and
<br />convergence in our computations or not, so for salve of economics
<br />we do not include these in the computations.
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