CHR_ID,ELEVATION,READ_DATE,DATUM_ADJ
21018400,1377.77,1990-08-02,NGVD 29
21018400,1381.80,1996-04-29,NGVD 29
21018400,1381.22,1996-12-03,NGVD 29
21018400,1381.72,1999-04-09,NGVD 29