Historic Crests
(1) 644.60 ft on 05/09/1960
(2) 642.90 ft on 04/27/1996
(3) 641.99 ft on 04/22/2002
(4) 641.95 ft on 12/10/2015
(5) 641.40 ft on 05/04/2013
(6) 640.32 ft on 05/29/2015
(7) 639.90 ft on 04/18/2002
(8) 639.85 ft on 04/08/1997
(9) 639.49 ft on 04/03/1998

(P): Preliminary values subject to further review.