Historic Crests
(1) 271.70 ft on 05/01/1991
(2) 270.30 ft on 05/31/1983
(3) 268.16 ft on 05/19/2019 (P)
(4) 268.00 ft on 05/11/2002
(5) 267.00 ft on 04/19/1980
(6) 266.80 ft on 12/31/1982
(7) 265.20 ft on 07/24/1989
(8) 261.80 ft on 07/04/1997
(9) 259.02 ft on 11/09/2009
(10) 258.50 ft on 06/05/1990
(11) 257.60 ft on 05/30/2003
(12) 257.52 ft on 05/05/2016
(13) 257.03 ft on 05/27/2013
(14) 256.60 ft on 12/26/2001
(15) 255.90 ft on 07/29/1994
(16) 255.34 ft on 04/30/2015
(17) 255.13 ft on 12/27/2004
(18) 254.35 ft on 01/01/2005
(19) 254.30 ft on 01/01/2010
(20) 254.00 ft on 05/10/1999
(21) 253.40 ft on 01/01/1992
(22) 253.18 ft on 06/04/2008
(23) 253.10 ft on 12/13/1986
(24) 253.10 ft on 07/07/1995
(25) 252.84 ft on 07/21/2014
(26) 252.60 ft on 05/31/1998
(27) 252.60 ft on 06/19/1996
(28) 252.55 ft on 05/25/2011
(29) 252.30 ft on 08/13/1993
(30) 250.90 ft on 08/22/1985
(31) 250.70 ft on 05/21/1984
(32) 250.10 ft on 06/29/2000
(33) 248.40 ft on 01/01/1987
(34) 247.98 ft on 05/19/2006
(35) 245.67 ft on 09/15/2017
(36) 243.80 ft on 09/30/1981
(37) 243.07 ft on 07/31/2007
(38) 242.76 ft on 10/09/2012
(39) 242.20 ft on 10/05/1988

(P): Preliminary values subject to further review.