Chain of Rocks Lock photograph

Chain Of Rocks Lock

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Opened 1953
Operator United States Army Corps of Engineers
ImpoundUpper Mississippi River
Locations Madison
Granite City
Illinois
USA
Date of Reg.
Date of Upd.
ID2258774
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About Chain Of Rocks Lock


Chain of Rocks Lock and Dam, also known as Locks No. 27, is a lock situated at the southern end of Chouteau Island near St. Louis, Missouri on the Upper Mississippi River. Its associated dam is just downstream of the Chain of Rocks Bridge, and the lock is located over 3 miles southeast on the Chain of Rocks canal.

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