Built 1938 (581)
Built during 1930s (8,551)
Dam (28)
Illinois (2,500)
Iowa (3,507)
Mississippi River (155)
Navigable waterway (1,448)
| Open (28,314)
Owned by Corps of Engineers (43)
Owned by federal government (590)
Rock Island County, Illinois (40)
Scott County, Iowa (53)
State line crossing (514)
Total length over 2500 feet (587)
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