Z06606790 USGS H06606790 4244560952216001919021SW1023000515.50 N06606790 Maple Creek near Alta, IA Y06606790 306606790 1966 46.04Bm 306606790 1967 46.04Bm 306606790 19680625 440 87.29 306606790 19690625 5300 89.75 306606790 1970 46.04Bm 306606790 19710606 1150 88.25 306606790 19720501 60.0 85.35 306606790 19730306 260 86.75 306606790 19740622 144 86.02 306606790 19750625 1440 88.47 306606790 1976 46.04Bm 306606790 1977 46.04Bm 306606790 19780912 145 86.12 306606790 19790322 560 87.28 306606790 19800605 84.0 85.46 306606790 19810614 560 87.29 306606790 19820319 98.0 85.48 306606790 19830620 4600 89.63 306606790 19840412 190 86.38 306606790 1985 32.04Bm 306606790 19860509 590 87.45 306606790 1987 32.04Bm 306606790 1988 32.04Bm 306606790 1989 32.04Bm