Historic Crests
(1) 4,211.80 ft on 06/01/1986
(2) 4,211.00 ft on 04/01/1987
(3) 4,209.55 ft on 08/15/1985
(4) 4,209.55 ft on 03/15/1988
(5) 4,209.25 ft on 08/01/1984
(6) 4,204.50 ft on 08/01/1999

(P): Preliminary values subject to further review.