Lock and Dam No. 21

[2] In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No.

Currently there is a study being conducted by the city of Quincy to convert Lock & Dam No.

[3] Media related to Mississippi River Lock and Dam number 21 at Wikimedia Commons

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Lock and Dam 21. View is from the Illinois side of the river, looking upriver to the north.