| 670.0 | Water begins to flow over portions of the protective earthen dike. | | 668.7 | Water levels reach the flood of record. | | 665.0 | Lock gates and walls go under water. | | 664.5 | The lock and dam is closed to navigation. |
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1) 667.85 ft on 04/19/1965
2) 665.70 ft on 04/16/2001
3) 665.45 ft on 04/11/1997
4) 665.10 ft on 04/18/1969
5) 663.84 ft on 04/19/1952
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1) 645.46 ft on 07/23/1936
2) 647.77 ft on 02/24/1944
3) 649.32 ft on 12/16/1938
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