Roller drum gate barrages: Recently Modified

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• Roller drum gate barrages

Recently Modified

Mississippi River Lock & Dam No. 17

USA (1939), modified on 29/01/2022

Mississippi River Lock & Dam No. 18

USA (1937), modified on 29/01/2022

Mississippi River Lock & Dam No. 11

USA (1937), modified on 26/12/2021

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