Historic Crests
(1) 549.70 ft on 05/03/2011
(2) 547.50 ft on 04/12/2008
(3) 547.40 ft on 05/12/1996
(4) 547.20 ft on 05/16/1983
(5) 546.50 ft on 07/14/2015
(6) 545.90 ft on 09/01/1979
(7) 545.60 ft on 06/10/1990
(8) 545.30 ft on 07/06/1995
(9) 544.60 ft on 12/03/2006
(10) 544.10 ft on 01/29/2012
(11) 543.50 ft on 01/22/2007
(12) 542.90 ft on 11/06/2009
(13) 541.50 ft on 05/18/2016
(14) 541.40 ft on 05/18/2002
(15) 541.10 ft on 05/29/2017
(16) 541.10 ft on 12/27/2013

(P): Preliminary values subject to further review.