Historic Crests
(1) 285.80 ft on 04/28/1973
(2) 281.10 ft on 05/15/1979
(3) 278.00 ft on 04/20/1980
(4) 267.45 ft on 05/12/2011
(5) 261.40 ft on 09/04/1981
(6) 257.74 ft on 08/14/2017

(P): Preliminary values subject to further review.