Observation history unavailable for thie location.
Flood Impacts
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.
Historical Crests
Low Water Records
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
6) 643.76 ft on 04/13/1997
7) 643.55 ft on 04/07/1967
8) 643.45 ft on 05/01/1975
9) 643.23 ft on 06/26/1993
10) 643.04 ft on 05/07/1954
1) 625.30 ft on 07/31/1936
2) 628.60 ft on 01/01/1937
3) 629.50 ft on 10/04/1947
4) 630.00 ft on 02/05/1944
5) 630.30 ft on 12/27/1990