Lock 27 Chain of Rocks Canal

3291 West 20th Street, Granite City IL 62040 | 618.452.7107
ILLINOISouth Tourism

The southernmost lock & dam on the Mississippi River, and the only one south of the confluence of the Mississippi and Missouri rivers, Lock & Dam 27 moves more cargo than any other lock and dam on the Mississippi. It was built in response to a "chain of rocks" that made the river unnavigable in low water. The lock and dam are unique on the Mississippi, because the dam is a rock weir and the lock isn't connected to the dam and is actually 3 miles away at the southern end of the Chain of Rocks Canal which allows traffic to bypass the unnavigable portion.

Return to Previous Page


Lascelle's Granite City

Wake of the Flood

MCT Schoolhouse Trail