Historic Crests
(1) 1,854.80 ft on 07/25/1975
(2) 1,854.60 ft on 08/31/1975
(3) 1,854.60 ft on 07/01/2011
(4) 1,854.40 ft on 07/07/1997
(5) 1,853.70 ft on 06/30/1997
(6) 1,851.30 ft on 09/30/1975
(7) 1,848.20 ft on 10/31/1975
(8) 1,848.00 ft on 05/31/1997
(9) 1,847.90 ft on 03/31/1972
(10) 1,847.70 ft on 04/30/1972
(11) 1,847.40 ft on 11/30/1972
(12) 1,847.40 ft on 11/30/1971
(13) 1,846.80 ft on 12/31/1972
(14) 1,845.30 ft on 01/31/1973
(15) 1,843.60 ft on 02/28/1973
(16) 1,818.30 ft on 07/10/2007
(17) 1,817.84 ft on 07/17/2005
(18) 1,817.80 ft on 07/17/2007
(19) 1,817.33 ft on 07/11/2004
(20) 1,816.70 ft on 01/31/2004
(21) 1,816.40 ft on 07/31/2004
(22) 1,815.30 ft on 05/14/1991
(23) 1,815.10 ft on 06/30/2004
(24) 1,814.70 ft on 04/30/2004
(25) 1,814.30 ft on 08/31/2004
(26) 1,814.30 ft on 02/28/2004
(27) 1,814.30 ft on 05/31/2004
(28) 1,813.90 ft on 03/31/2004
(29) 1,813.20 ft on 09/30/2004
(30) 1,812.70 ft on 10/31/2004
(31) 1,812.30 ft on 11/30/2004
(32) 1,810.00 ft on 12/31/2004

(P): Preliminary values subject to further review.