Historic Crests
(1) 50.50 ft on 04/05/1881
(2) 35.50 ft on 04/13/1952
(3) 34.80 ft on 03/22/1932
(4) 33.60 ft on 04/08/1943
(5) 31.60 ft on 04/24/1950
(6) 31.00 ft on 04/03/1947
(7) 30.82 ft on 04/09/1944
(8) 30.55 ft on 04/10/1949
(9) 30.30 ft on 03/03/1934
(10) 30.29 ft on 06/14/1941
(11) 30.20 ft on 05/15/1942
(12) 30.15 ft on 07/12/1938
(13) 30.10 ft on 04/01/1939
(14) 29.60 ft on 03/24/1937
(15) 29.05 ft on 03/21/1948
(16) 28.90 ft on 07/16/1935
(17) 28.64 ft on 06/28/1933
(18) 28.59 ft on 06/25/1953
(19) 28.57 ft on 06/22/1946
(20) 28.43 ft on 04/07/1951
(21) 28.20 ft on 03/12/1945
(22) 27.85 ft on 03/21/1936
(23) 27.42 ft on 06/15/1940
(24) 27.22 ft on 06/15/1931
(25) 25.93 ft on 07/07/2011
(26) 25.61 ft on 03/11/1955
(27) 24.79 ft on 06/07/1954
(28) 24.62 ft on 10/10/1956
(29) 24.12 ft on 09/10/1969
(30) 24.07 ft on 10/03/1957
(31) 23.62 ft on 06/17/1971
(32) 23.59 ft on 10/07/1958
(33) 23.59 ft on 03/29/1960
(34) 23.39 ft on 08/17/1972
(35) 23.33 ft on 07/04/1962
(36) 23.24 ft on 09/11/1975
(37) 23.17 ft on 10/06/1975
(38) 23.00 ft on 11/02/1960
(39) 22.81 ft on 07/16/1968
(40) 22.80 ft on 07/25/1963
(41) 22.76 ft on 08/23/1967
(42) 22.68 ft on 07/21/1966
(43) 22.66 ft on 08/14/1965
(44) 22.57 ft on 10/01/1972
(45) 22.52 ft on 08/12/1964
(46) 21.29 ft on 10/12/1978
(47) 21.26 ft on 09/14/1978
(48) 20.61 ft on 01/11/1997
(49) 20.30 ft on 07/24/1974
(50) 20.30 ft on 12/25/1983
(51) 20.22 ft on 10/01/1976
(52) 19.67 ft on 11/03/1997
(53) 19.48 ft on 01/23/1982
(54) 19.14 ft on 11/30/1979
(55) 18.93 ft on 10/25/1984
(56) 18.78 ft on 12/01/1982
(57) 18.75 ft on 11/12/1980
(58) 18.73 ft on 10/21/1986
(59) 18.61 ft on 08/21/1995
(60) 18.25 ft on 08/26/1986
(61) 18.25 ft on 07/16/1996
(62) 18.20 ft on 02/06/1988
(63) 17.03 ft on 01/18/1994
(64) 16.82 ft on 11/02/1988
(65) 16.60 ft on 08/31/1999
(66) 16.58 ft on 11/26/1999
(67) 16.48 ft on 01/08/2010
(68) 16.42 ft on 12/24/1990
(69) 16.36 ft on 12/22/1989
(70) 15.89 ft on 10/01/2011
(71) 15.87 ft on 10/01/1991
(72) 15.35 ft on 10/09/1992
(73) 15.13 ft on 10/03/2000
(74) 14.73 ft on 09/29/2014
(75) 14.44 ft on 08/16/2002
(76) 14.38 ft on 10/01/2002
(77) 14.03 ft on 06/10/2004
(78) 14.02 ft on 08/05/2006
(79) 13.85 ft on 09/28/2009
(80) 13.66 ft on 02/03/2007
(81) 13.61 ft on 10/06/2012
(82) 13.29 ft on 09/25/2005
(83) 12.92 ft on 08/26/2008
(84) 12.92 ft on 05/31/2017
(85) 12.09 ft on 10/16/2015

(P): Preliminary values subject to further review.