>>From an article in my Dutch newspaper I understand that the American Army Corps of Engineers builds levees with an average chance of breakthrough once in 230 years. In the Netherlands the norm is once in 1250 years for the river areas and once in 10,000 years for the cities. According to a Dutch professor the Americans have a different idea about risks.
>
>And have the Dutch dykes actually lasted 1250 - 10,000 years? The proof of the pudding is in the eating.
[snip]
Ever heard of testing in laboratories? Engineers have their methods to calculate the required strength and height of dikes. Maybe not in your country, but in the Netherlands we do have that expertise.
That's why I can sleep well. :)
Groet,
Peter de Valença
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