Historic Crests
(1) 1,619.68 ft on 06/26/2011
(2) 1,618.71 ft on 06/25/1995
(3) 1,618.70 ft on 06/25/1996
(4) 1,618.60 ft on 05/01/1997
(5) 1,618.50 ft on 05/14/1986
(6) 1,618.30 ft on 06/01/1984
(7) 1,617.90 ft on 07/01/2010
(8) 1,617.90 ft on 08/01/1975
(9) 1,617.70 ft on 08/01/1999
(10) 1,616.70 ft on 06/01/1971
(11) 1,616.60 ft on 07/01/1983
(12) 1,616.40 ft on 05/01/1969
(13) 1,616.20 ft on 07/01/1979
(14) 1,616.20 ft on 07/01/1978
(15) 1,616.00 ft on 07/01/1972
(16) 1,615.40 ft on 04/01/1987
(17) 1,613.90 ft on 06/01/2009
(18) 1,613.50 ft on 06/01/1970
(19) 1,613.10 ft on 06/01/1982
(20) 1,612.90 ft on 07/01/1998
(21) 1,611.70 ft on 04/01/1994
(22) 1,611.60 ft on 09/09/1993
(23) 1,611.20 ft on 04/01/1985
(24) 1,610.10 ft on 03/01/1968
(25) 1,609.50 ft on 04/01/1974
(26) 1,609.40 ft on 06/01/1976
(27) 1,608.80 ft on 05/01/1973
(28) 1,608.80 ft on 06/01/2001
(29) 1,608.60 ft on 03/01/1977
(30) 1,608.40 ft on 04/01/1980
(31) 1,608.00 ft on 03/01/2000
(32) 1,607.10 ft on 03/01/1988
(33) 1,602.50 ft on 03/01/1981
(34) 1,599.10 ft on 02/01/2002
(35) 1,594.30 ft on 12/01/2008
(36) 1,594.00 ft on 04/01/1989
(37) 1,593.00 ft on 07/01/1991
(38) 1,592.90 ft on 03/01/1992
(39) 1,591.00 ft on 03/01/1990
(40) 1,588.90 ft on 05/01/2003
(41) 1,583.20 ft on 06/01/2007
(42) 1,582.50 ft on 04/01/2004
(43) 1,578.40 ft on 07/01/2005
(44) 1,577.90 ft on 02/01/2006

(P): Preliminary values subject to further review.