CHR_ID,ELEVATION,READ_DATE,DATUM_ADJ
77001000,1212.35,1980-10-01,LOCAL
77001000,1211.42,1987-06-24,NAVD 88
77001000,1209.49,1988-09-21,NAVD 88
77001000,1211.89,2006-05-04,NAVD 88