Question: There are 2 0 7 lock chambers at 1 7 1 sites on the USACE waterways. Most of the locks and dams are well past

There are 207 lock chambers at 171 sites on the USACE waterways. Most of the locks and dams are well past their 50-year design lifeThe locks on the Upper Mississippi were generally built in the ........ Group of answer choices1910's1940's1930's1960's

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