sentences:  Folsom Dam may have prevented as much as $4.7 billion in damages in 1986 alone.The New Year's Day storm of 1997 was the most severe in recent history, with a total inflow of 1 million acre feet (equal to the entire capacity of Folsom Lake) over a 5-day period.However, this time the Bureau of Reclamation was able to limit releases to less than .