Historic Crests
(1) 442.58 ft on 05/01/1966
(2) 441.51 ft on 05/08/1969
(3) 440.94 ft on 05/10/1995
(4) 440.42 ft on 04/25/1973
(5) 439.65 ft on 06/23/2015

(P): Preliminary values subject to further review.