The failure of a hydroelectric dam in Russia last week turned the spotlight on aging infrastructure in the U.S. American dams on average are 51 years old and have received a grade of "D" from ASCE. More than 2,000 dams in the country are due for repairs. The Association of State Dam Safety Officials estimates it would cost $16 billion to fix hazardous dams -- not the less than $60 million budgeted by the states.

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