Historic Crests
(1) 645.72 ft on 05/31/2015
(2) 645.40 ft on 06/21/2015
(3) 644.80 ft on 05/06/1990
(4) 643.18 ft on 06/05/1957
(5) 640.73 ft on 07/13/2007
(6) 635.09 ft on 06/06/1987
(7) 633.49 ft on 05/16/1993
(8) 632.11 ft on 06/02/1982
(9) 631.54 ft on 06/18/1989
(10) 630.87 ft on 12/27/1991
(11) 630.71 ft on 10/20/1981
(12) 625.00 ft on 06/11/1985
(13) 624.76 ft on 06/30/1991
(14) 620.91 ft on 10/27/1983
(15) 620.81 ft on 01/01/1988
(16) 620.81 ft on 12/31/1987
(17) 618.84 ft on 06/19/1986
(18) 618.84 ft on 06/08/1986

(P): Preliminary values subject to further review.