The Straight Dope
How long are these huge dams, like the Hoover Dam, engineered to last? How would we go about replacing it if it began to weaken or became obsolete? What’s the largest dam ever to fail? –Craig S., Jacksonville, Florida Best of Chicago voting is live now. Vote for your favorites » Don’t sweat the big dams, chum. It’s the little ones you should worry about. Most of the small and medium-size dams in this country were built to last just 50 years....