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Page 18 <br />_ Northern <br />Coal <br />' ,] Company <br /> CURTIS CREER SUBSIDENCE MONUPtENTS <br />Fifteenth veep of weekly monitoring. Rienau 02, 1st East, 1 Left, is under Curtis Creek <br />when monitored. f <br />i DIFFERENCE <br /> ORIGINAL PRESENT FROM ORIGINAL <br />MONUMENT 0 ELEVATION ELEVATION TO PRESENT <br />8 6,905.36"' 6,905.40' `~ +4.04' '~ <br />10 6,905.89 "' 6,905.81' / -0.08' / <br />11 6,906.00'/ 6,905.91 "~ -0.09' / <br />1 <br />12 <br />6,910.53"~ <br />6,910.35"~ <br />-0.18"~ <br />13 6,908.90' ~ 6,908.67' '~ -0.23' '~ <br />14 ~ 6,904.20 " 6,903.90' '~ -0.30' '/ <br />15 6,900.09' ~ 6,899.77' / -0.32' ~ <br />16 6,907.66' V 6,907.63''' -0.03'x' <br />17 6,908.33j° 6,908.33 "~ 4.00'' <br />18 6,909.07' ~ 6,909.07' ~ 0.00 "' <br />NOTES: - <br />1) Vertical co~rol for monuments are based on the U.S.G.S. Bench Marks H-384 <br />(6,927.535) aad 0384 (6,381.089) <br />Survey done May 1, 1981 <br />Notes are recorded in Book No. 37, on pages 74 through 73 <br />I <br />.7B/mjb <br />pc: File <br /> <br />