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<br />SUBSIDENCE MONITORING DATA <br />4TH QUARTER, 1989 <br />MAP 23 PRE-MINE AVE 12/26/89 <br />POINT ELEVATION <br />ID <br />DIFFERENCE <br />B-1 39553.3 12254.1 6943.2 6943.1 -0.1 <br />B-2 39652 12254.3 6935.3 6935.3 0 <br />B-3 39751.6 12253 6933.5 6933.5 0 <br />B-4 39803.3 12251.7 6929.6 6929.5 -0.1 <br />B-5 39854.5 12251.7 6926.1 6926 -0.1 <br />B-6 39903 12252.3 6923.3 6923.3 0 <br />B-7 39952.8 12251.9 6920.5 6920.5 0 <br />B-8 40052.2 12250.6 6915.5 6915.4 -0.1 <br />B-9 40151.3 12248.5 6911.7 6911.5 -0.2 <br />B-10 40251.9 12248 6907.7 6907.4 -0.3 <br />B-11 40402.7 12245.3 6903.7 6903.1 -0.6 <br />B-12 40503.1 12242.9 6898.5 6897.5 -1 <br />A-4 40852.4 12242.1 6872.7 6869.8 -2.9 <br />B-13 41229.7 12237 6849.6 6849.3 -0.3 <br />B-14 41303.9 12234.3 6847.5 6847.3 -0.2 <br />B-15 41453.8 12233.5 6840.5 6840.3 -0.2 <br />B-16 41553.9 12231.3 6837.2 6837 -0.2 <br />B-17 41654 12230.3 6835.6 6835.4 -0.2 <br />B-18 41752.8 12230.5 6831.5 6831.5 0 <br />B-19 41803.7 12227.9 6829.1 6829.1 0 <br />B-20 41852.6 12228.6 6826.6 6826.6 0 <br />B-21 41903.3 12227,9 6825.2 6825.2 0 <br />B-22 41951.3 12226.2 6822.8 6822.9 0.1 <br />A-2 40849.8 12040.6 6858.9 6858.9 0 <br />A-3 40851.4 12138 6867.3 6864.1 -3.2 <br />A-5 40856.2 12340.8 6876.3 6873.4 -2.9 <br />A-6 40853.3 12414.9 6878.5 6875.7 -2.8 <br />A-7 40857.3 12506,1 6878.5 6876.2 -2.3 <br />NORTHING EASTING <br />NOTE: PRE-MINE AVG ELEVATION BASED UPON SURVEY DATA FOR MONUMENTS <br />FOR PERIOD 7/16/88 THROUGH 10/16/89 <br />