| 55.0 | THIS WAS THE ST. PATRICKS DAY FLOOD OF 1936. THIS CREST OCCURRED BEFORE FLOOD CONTROL PROJECTS WERE IN PLACE AT NUMEROUS LOCATIONS UPSTREAM. | | 40.5 | Lock walls overtopped. | | 37.0 | Navigation suspended, lock out of service. |
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1) 55.00 ft on 03/18/1936
2) 47.90 ft on 12/31/1942
3) 43.10 ft on 06/24/1972
4) 43.00 ft on 10/17/1954
5) 43.00 ft on 01/19/1996
6) 42.00 ft on 03/11/1966
7) 41.30 ft on 01/23/1959
8) 41.00 ft on 09/19/2004
9) 40.50 ft on 01/28/1952
10) 37.70 ft on 12/05/1950
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1) 0.00 ft on 01/01/1980
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