Historic Crests
(1) 557.28 ft on 05/04/2011
(2) 556.25 ft on 05/15/2002
(3) 555.03 ft on 04/13/2008
(4) 554.95 ft on 05/16/1996
(5) 551.55 ft on 05/17/1983
(6) 551.39 ft on 01/18/2005
(7) 551.27 ft on 06/25/1998
(8) 551.10 ft on 01/24/2007
(9) 551.01 ft on 04/16/2018
(10) 550.60 ft on 05/02/1973
(11) 549.92 ft on 06/04/1995
(12) 549.76 ft on 04/10/1989
(13) 549.57 ft on 07/26/2015
(14) 549.30 ft on 04/02/1975
(15) 549.20 ft on 12/14/1985
(16) 549.10 ft on 03/25/1982
(17) 548.60 ft on 02/10/1969
(18) 548.60 ft on 04/19/1979
(19) 548.36 ft on 03/21/2006
(20) 548.34 ft on 05/28/1990
(21) 547.82 ft on 12/08/1993
(22) 547.70 ft on 06/03/1968
(23) 547.36 ft on 01/13/1991
(24) 546.91 ft on 03/23/1997
(25) 546.69 ft on 12/28/2001
(26) 546.62 ft on 04/16/2014
(27) 546.41 ft on 01/30/2012
(28) 546.00 ft on 02/14/1999
(29) 545.76 ft on 05/20/2017
(30) 545.64 ft on 03/17/2016
(31) 545.57 ft on 01/12/2014
(32) 545.49 ft on 05/09/1994
(33) 545.40 ft on 01/15/2004
(34) 544.57 ft on 05/21/2009
(35) 544.40 ft on 04/29/1984
(36) 543.47 ft on 05/21/2003
(37) 542.80 ft on 02/09/1988
(38) 542.27 ft on 01/29/2017
(39) 542.16 ft on 06/29/2010
(40) 540.32 ft on 04/26/1992
(41) 540.08 ft on 04/17/1987

(P): Preliminary values subject to further review.