Historic Crests
(1) 647.38 ft on 04/21/1965
(2) 645.20 ft on 04/18/2001
(3) 644.87 ft on 04/20/1969
(4) 644.30 ft on 04/20/1952
(5) 643.85 ft on 04/19/1951
(6) 643.76 ft on 04/13/1997
(7) 643.55 ft on 04/07/1967
(8) 643.45 ft on 05/01/1975
(9) 643.23 ft on 06/26/1993
(10) 643.04 ft on 05/07/1954
(11) 642.88 ft on 04/14/2011
(12) 642.68 ft on 04/08/1986
(13) 642.07 ft on 07/01/2014
(14) 642.05 ft on 06/22/1943
(15) 641.92 ft on 09/27/2010
(16) 641.73 ft on 03/20/1973
(17) 641.65 ft on 06/05/1942
(18) 641.62 ft on 03/12/1983
(19) 641.38 ft on 04/26/1996
(20) 641.29 ft on 04/23/1982
(21) 641.19 ft on 04/18/1971
(22) 641.18 ft on 05/15/1950

(P): Preliminary values subject to further review.