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Dam IncidentsDam Incidents„„Total number of incidentsTotal number of incidents(1990(1990--2003) 2003) 4848––Class 1Class 1--23 Class 2 23 Class 2 --10; Class 3 10; Class 3 --1515„„Summary by yearSummary by year»»1990 1990 --111991 1991 --001992 1992 --221993 1993 ––111994 1994 --111995 1995 --221996 1996 --221997 1997 ––331998 1998 --221999 1999 --992000 2000 ––222001 2001 ––772002 2002 ––552003 2003 ––11112004 2004 --00„„The greatest risk is most often associated The greatest risk is most often associated with overtopping or static load (operational) with overtopping or static load (operational) conditions resulting in seepage piping and conditions resulting in seepage piping and erosionerosion