| 649.0 | Water begins to flow over the protective earthen dikes. | | 647.4 | Water levels reach the flood of record. | | 647.0 | Water begins to flow over the lock gates and walls. | | 646.5 | Lock and dam 6 is closed to navigation. |
|
1) 647.48 ft on 04/21/1965
2) 645.20 ft on 04/18/2001
3) 644.87 ft on 04/20/1969
4) 644.30 ft on 04/20/1952
5) 643.85 ft on 04/19/1951
|
1) 625.25 ft on 07/31/1936
2) 628.60 ft on 01/01/1937
3) 629.51 ft on 10/04/1947
|
|
