Historic Crests
(1) 428.20 ft on 12/15/1966
(2) 428.20 ft on 05/10/1970
(3) 427.70 ft on 02/20/1969
(4) 427.21 ft on 06/07/2002
(5) 427.00 ft on 04/15/1979
(6) 426.40 ft on 01/28/1993
(7) 426.31 ft on 04/10/1998
(8) 426.29 ft on 01/04/2010
(9) 426.27 ft on 02/07/2019
(10) 426.26 ft on 01/18/2005
(11) 426.16 ft on 03/14/2011
(12) 426.12 ft on 04/27/2013
(13) 426.11 ft on 05/04/2013
(14) 426.06 ft on 04/18/2008
(15) 426.04 ft on 04/14/2018
(16) 426.03 ft on 05/10/2017
(17) 426.01 ft on 01/07/2016
(18) 425.79 ft on 02/03/1999
(19) 425.77 ft on 02/16/2001
(20) 425.57 ft on 04/11/2009
(21) 425.50 ft on 01/08/2004
(22) 425.47 ft on 01/08/2004
(23) 425.47 ft on 01/08/2004
(24) 425.40 ft on 04/04/1980
(25) 425.07 ft on 02/08/2012
(26) 425.00 ft on 05/27/1995
(27) 424.89 ft on 04/07/2014
(28) 424.81 ft on 02/14/2008
(29) 424.69 ft on 03/07/2008
(30) 424.45 ft on 03/28/2015
(31) 424.38 ft on 03/18/2008
(32) 424.26 ft on 03/01/2009
(33) 424.15 ft on 12/25/2004
(34) 424.06 ft on 01/06/2009
(35) 424.02 ft on 03/01/2007
(36) 423.70 ft on 03/03/2014
(37) 423.57 ft on 03/21/2006
(38) 422.21 ft on 07/21/2000
(39) 419.60 ft on 05/22/2003

(P): Preliminary values subject to further review.