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Dam Incidents•Total number of incidents(1990-2006) 71–High – 28; Significant - 12; Low - 31•Summary by year•1990 - 1 1991 - 0 1992 - 2 1993 – 11994 - 1 1995 - 2 1996 - 2 1997 – 31998 - 2 1999 - 9 2000 – 2 2001 – 72002 – 5 2003 – 11 2004 – 13 2005 – 32006 - 7•The greatest risk is most often associated with overtopping due to extreme storms or static load (operational) conditions resulting in seepage piping and erosion