Historic Crests
(1) 525.10 ft on 04/06/1886
(2) 519.90 ft on 07/15/1916
(3) 518.70 ft on 04/11/1936
(4) 517.80 ft on 02/26/1961
(5) 517.50 ft on 01/02/1933
(6) 517.20 ft on 02/16/1946
(7) 516.10 ft on 03/31/1951
(8) 515.43 ft on 02/17/1990
(9) 515.00 ft on 01/07/1949
(10) 514.65 ft on 04/14/1979
(11) 514.40 ft on 04/05/1977
(12) 513.30 ft on 03/28/1980
(13) 512.69 ft on 03/21/1990
(14) 512.68 ft on 10/04/1995
(15) 512.44 ft on 03/04/2019
(16) 511.77 ft on 11/24/2005
(17) 511.48 ft on 10/27/1997
(18) 511.38 ft on 05/08/2003
(19) 511.33 ft on 05/06/2013
(20) 511.33 ft on 05/19/2003
(21) 511.26 ft on 06/21/1989
(22) 511.03 ft on 10/26/1998
(23) 511.00 ft on 02/24/2016
(24) 510.71 ft on 03/31/2002
(25) 510.60 ft on 03/08/1996
(26) 509.16 ft on 01/26/2004
(27) 509.16 ft on 09/17/2004
(28) 508.09 ft on 01/24/2006

(P): Preliminary values subject to further review.