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<br />SUBSIDENCE: MONUMF.Ni SURVEYS <br />'10NUMENT I.D. <br />ORIGINAI. SURVEY <br />DATE NORTHING FASTING <br />NF.W SURVEY <br />ELEVATION DATE NORTHING FASTING ELEVATION <br />SPI-30 11-26-85 31174.5 17389.7 6991.5 E~EVarIDN <br />DIFFERENCE <br /> 1-4-86 34174.5 17389.7 6991.5 <br /> 5/22/86 " " " <br /> 8-11-86 6991.3 -0.2 <br /> 8-21-86 " <br /> 9-2-86 6991.2 -0.3 <br /> 11-19-86 " <br /> ~~ ~~ <br /> <br /> 1 -08-87 34174.4 173 6 90.6 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />