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4 <br />STREETER FILL MONITORING <br />7000 BENCH NORTH POINT <br />3 <br />2 <br />1 <br />~ 0 <br />W <br />W <br />w <br />-1 <br />-2 <br />-3 <br />-4 <br />-5 <br />1984 <br />1985 1986 1987 <br />DELTA NORTH <br />1988 1989 1990 <br />YEAR <br />_~ DELTA EAST <br />1991 1992 1993 1994 <br />_,_ VERTICAL. MOVEMENT <br />