US Army Corps of Engineers
St. Louis District

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Lock 25

Lock & Dam 25


Lock and Dam 25 is equipped the 1,296-foot long dam structure with three submersible roller gates (near the center of the structure, see image at right) and 14 submersible tainter gates. At the time of construction, the submersible gates represented a marked advance in gate design and were seen as an improvement over non-submersible gates because they allowed for the almost unobstructed flow of floodwaters, ice and debris.

Having opened on May 18, 1939, Lock and Dam 25 is well beyond its 50-year design life and is currently undergoing major rehabilitation.

Location: Winfield, Mo.
Mississippi River Mile: 241.4
1st Day of Operation: May 18, 1939
Average lift: 15 feet
Pool size: 49,674 acre feet
Pool length: 27.8 miles
Lock characteristics:
Single Lock, 600 feet long, 110 feet wide
Dam Characteristics:
1,296 feet long, 14 Tainter Gates, 3 Roller Gates
Phone number: (636) 566-8120
Marine Radio: 12
Year
Tonnage
Lockages
2009
26,926,504
4,545
2008
23,244,934
3,929
2007
30,204,744
5,314
2006
31,026,288
4,971
2005
29,043,655
4,886
2004
27,894,562
4,795
2003
33,749,527
5,614
2002
38,916,145
6,601
2001
34,858,294
6,008
2000
39,177,450
6,623
1999
39,536,830
6,777
1998
34,819,845
6,110
1997
33,638,634
6,132
1996
36,088,709
6,652
1995
37,432,909
6,654
1994
30,758,651
5,658
1993
26,560,658
4,687
1992
39,378,151
7,282
1991
37,758,657
7,394
1990
42,339,143
7,923
1989
36,218,686
7,118
1988
37,875,033
7,326
1987
35,319,224
6,720
1986
28,159,960
5,681
1985
26,109,104
5,389
1984
36,167,255
7,027
1983
37,439,016
7,319
1982
32,767,055
6,586
1981
34,309,187
7,067
1980
32,519,470
6,770
1979 28,638,386 Na
1978 29,041,957 6,100
1977 25,093,200 5,671
1976 24,781,578 5,708
1975 23,712,446 5,336
1974 24,292,547 5,374
1973 22,706,350 5,085
1972 24,611,927 5,785
1971 21,430,888 5,580
1970 22,175,609 5,327
1969 18,622,522 4,715
1968 16,547,642 5,146
1967 16,355,932 4,906
1966 15,857,490 4,803
1965 13,425,723 4,287
1964 13,408,798 4,664
1963 12,599,623 4,345
1962 10,814,046 4,023
1961 9,762,001 3,866
1960 9,686,116 3,737
1959 9,154,872 3,834
1958 8,464,618 3,646
1957 7,460,929 3,383
1956 6,792,648 2,884
1955 6,530,038 2,974
1954 5,675,246 2,914
1953 5,072,640 2,870
1952 4,044,774 2,276
1951 4,225,148 2,187
1950 4,323,837 2,571
1949 3,654,954 2,634
1948 3,252,308 2,341
1947 3,120,342 2,068
1946 2,989,198 2,570
1945 2,033,557 1,695
1944 1,875,881 1,624
1943 1,608,788 1,687
1942 1,987,289 2,447
1941 1,974,121 2,189
1940 1,570,167 2,188
1939 1,122,824 1,645