Historic Crests
(1) 536.94 ft on 05/31/2015
(2) 536.73 ft on 05/04/1990
(3) 536.57 ft on 05/26/1957
(4) 536.46 ft on 11/01/1981
(5) 535.25 ft on 05/29/1982

(P): Preliminary values subject to further review.