It was a passion to get her affairs in order before she had to retire behind doors, to have as much money as possible in case the deluge broke upon her again, to have a stout levee of cash against the rising tide of Yankee hate.
There are no more uses of "levee" in the book.
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Residents are working to fortify levees in expectation of heavy flooding tomorrow.
In about 100 years, the city will need higher levees because of global warming.